Dual, Wideband, High Output Current
OPERATIONAL AMPLIFIER
DESCRIPTION
The OPA2677 provides the high output current and low distortion
required in emerging ADSL and HDSL2 driver applications.
Operating on a single +12V supply, the OPA2677 consumes a
low 9mA/chan quiescent current to deliver a very high 500mA
peak output current. Guaranteed output current supports even the
most demanding ADSL CPE requirements with > 380mA mini-
mum output current with low harmonic distortion. Differential
driver applications will deliver < 85dBc distortion at the peak
upstream power levels of full rate ADSL. The high 200MHz
bandwidth will also support the most demanding VDSL line
driver requirements.
OPA2677
FEATURES
q
WIDEBAND +12V OPERATION: 200MHz (G = +4)
q
UNITY GAIN STABLE: 220MHz (G = 1)
q
HIGH OUTPUT CURRENT: 500mA
q
OUTPUT VOLTAGE SWING:
5V
q
HIGH SLEW RATE: 1800V/
s
q
LOW SUPPLY CURRENT: 18mA
q
FLEXIBLE POWER CONTROL
APPLICATIONS
q
xDSL LINE DRIVER
q
CABLE MODEM DRIVER
q
MATCHED I/Q CHANNEL AMPLIFIER
q
BROADBAND VIDEO LINE DRIVER
q
ARB LINE DRIVER
q
PERFORMANCE UPGRADE TO AD8017
Power control features are included in the SO-14 package version
to allow system power to be minimized. Two logic control lines
allow four quiescent power settings. These include full power,
power cutback for short loops, idle state for no signal transmission
but line match maintenance, and shutdown for power off with a
high impedance output.
Specified on
6V supplies (to support +12V operation), the
OPA2677 will also support a single +5V or dual
5V supply.
Video applications will benefit from its very high output
current to drive up to 10 parallel video loads (15
) with < 0.1%/
0.1
dG/d non-linearity.
TM
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111
Twx: 910-952-1111 Internet: http://www.burr-brown.com/ Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
OPA2677 RELATED PRODUCTS
SINGLES
DUALS
TRIPLES
NOTES
OPA681
OPA2681
OPA3681
Single +12V Capable
--
OPA2607
--
12V Capable
2000 Burr-Brown Corporation
PDS-1593A
Printed in U.S.A. April, 2000
Single Supply ADSL Upstream Driver
82.5
2k
2k
1
F
17.4
100
2Vp-p
AFE
Output
324
20
324
1/2
OPA2677
1/2
OPA2677
+12V
1:1.7
15Vp-p
Twisted Pair
17.7Vp-p
20
17.4
+6.0V
OPA2677
OPA2677
For most current data sheet and other product
information, visit www.burr-brown.com
2
OPA2677
SPECIFICATIONS: V
S
=
6V
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
OPA2677U, H, N
TYP
GUARANTEED
0
C to
40
C to
MIN/
TEST
PARAMETER
CONDITIONS
+25
C
+25
C
(2)
70
C
(3)
+85
C
(3)
UNITS
MAX
LEVEL
(1)
AC PERFORMANCE (Figure 1)
Small-Signal Bandwidth (V
O
= 0.5Vp-p)
G = +1, R
F
= 511
220
MHz
typ
C
G = +2, R
F
= 475
200
MHz
typ
C
G = +4, R
F
= 402
200
MHz
typ
C
G = +8, R
F
= 250
250
MHz
typ
C
Bandwidth for 0.1dB Gain Flatness
G = +4, V
O
= 0.5Vp-p
80
MHz
typ
C
Large-Signal Bandwidth
G = +4, V
O
= 5Vp-p
200
MHz
typ
C
Slew Rate
G = +4, 5V Step
1800
V/
s
typ
C
Rise/Fall Time
G = +4, V
O
= 2V Step
2
ns
typ
C
Spurious Free Dynamic Range
V
O
= 2Vp-p, 5MHz, 100
74
dB
typ
C
V
O
= 2Vp-p, 100kHz, 100
96
dB
typ
C
Input Voltage Noise
2.0
nV/
Hz
typ
C
Non-Inverting Input Current Noise
14
pA/
Hz
typ
C
Inverting Input Current Noise
21
pA/
Hz
typ
C
Differential Gain
NTSC, G = +2, R
L
= 150
0.03
%
typ
C
NTSC, G = +2, R
L
= 37.5
0.05
%
typ
C
Differential Phase
NTSC, G = +2, R
L
= 150
0.01
degrees
typ
C
NTSC, G = +2, R
L
= 37.5
0.04
degrees
typ
C
Channel-to-Channel Crosstalk
f = 5MHz, Input Referred
80
dB
typ
C
DC PERFORMANCE
(4)
Open-Loop Transimpedance Gain
V
O
= 0V, R
L
= 100
135
95
90
85
k
min
A
Input Offset Voltage
V
CM
= 0V
1.0
5.5
7
7.5
mV
max
A
Average Offset Voltage Drift
V
CM
= 0V
35
40
V/
C
max
B
Non-Inverting Input Bias Current
V
CM
= 0V
10
30
45
55
A
max
A
Average Non-Inverting Input Bias Current Drift
V
CM
= 0V
250
350
nA/
C
max
B
Inverting Input Bias Current
V
CM
= 0V
10
30
45
55
A
max
A
Average Inverting Input Bias Current Drift
V
CM
= 0V
250
350
nA
/C
max
B
INPUT
(4)
Common-Mode Input Range (CMIR)
(5)
4.5
4.2
4.1
4.0
V
min
A
Common-Mode Rejection Ratio(CMRR)
V
CM
= 0V, Input Referred
55
52
51
50
dB
min
A
Non-Inverting Input Impedance
250 || 2
k
|| pF
typ
C
Minimum Inverting Input Resistance
Open-Loop
22
14
min
B
Maximum Inverting Input Resistance
Open-Loop
22
30
max
B
OUTPUT
(4)
Voltage Output Swing
No Load
5.1
4.9
4.8
4.7
V
min
A
R
L
= 100
5.0
4.8
4.7
4.5
V
min
A
R
L
= 25
4.8
V
typ
C
Current Output, Sourcing
V
O
= 0
500
380
340
290
mA
min
A
Current Output, Sinking
V
O
= 0
500
380
340
290
mA
min
A
Closed-Loop Output Impedance
G = +4, f = 100kHz
0.003
typ
C
Power Control (SO-14 only)
Maximum Logic 0
A0, A1
1.8
1.0
V
max
A
Minimum Logic 1
A0, A1
2.3
2.6
V
min
A
Logic Input Current
A0 = A1 = 0
50
100
A
max
A
Supply Current at Full Power
A0 = 1, A1 = 1
18
mA
typ
C
Supply Current at Power Cutback
A0 = 0, A1 = 1
13.5
mA
typ
C
Supply Current at Idle Power
A0 = 1, A1 = 0
3.8
mA
typ
C
Supply Current at Shutdown
A0 = 0, A1 = 0
0.8
mA
typ
C
Output Impedance in Idle Power
G = +4, f = 100kHz
0.1
typ
C
Output Impedance in Shutdown
100 || 4
k
|| pF
typ
C
Supply Current Step Time
10% to 90% Change
200
ns
typ
C
Output Switching Glitch
Inputs at GND
20
mV
typ
C
Shutdown Isolation
G = +4, 1MHz, A0 = 0, A1 = 0
85
dB
typ
C
POWER SUPPLY
Specified Operating Voltage
6
V
typ
C
Maximum Operating Voltage
6.3
6.3
6.3
V
max
A
Maximum Quiescent Current
V
S
=
6V, Full Power
18
18.5
19
19.5
mA
max
A
Minimum Quiescent Current
V
S
=
6V, Full Power
18
17.5
16.6
16.3
mA
min
A
Power Supply Rejection Ratio (PSRR)
f = 100kHz, Input Referred
56
52
50
49
dB
min
A
TEMPERATURE RANGE
Specification: U, N
40 to +85
C
Thermal Resistance,
JA
U
SO-8
Junction-to-Ambient
125
C/W
H
PSO-8
55
C/W
N
SO-14
100
C/W
NOTES: (1) Test Levels: (A) 100% tested at 25
C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25
C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23
C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
V
CM
is the input common-mode voltage. (5) Tested < 3dB below minimum CMRR limit at
CMIR limits.
3
OPA2677
SPECIFICATIONS: V
S
= +5V
At T
A
= +25
C, G = +2, R
F
= 453
, and R
L
= 100
, unless otherwise noted. See Figure 2 for AC performance only
OPA2677U, H, N
TYP
GUARANTEED
0
C to
40
C to
MIN/
TEST
PARAMETER
CONDITIONS
+25
C
+25
C
(2)
70
C
(3)
+85
C
(3)
UNITS
MAX
LEVEL
(1)
AC PERFORMANCE (Figure 2)
Small-Signal Bandwidth (V
O
= 0.5Vp-p)
G = +1, R
F
= 536
160
MHz
typ
C
G = +2, R
F
= 511
150
MHz
typ
C
G = +4, R
F
= 453
160
MHz
typ
C
G = +8, R
F
= 332
160
MHz
typ
C
Bandwidth for 0.1dB Gain Flatness
G = +4, V
O
= 0.5Vp-p
70
MHz
typ
C
Large-Signal Bandwidth
G = +4, V
O
= 2Vp-p
100
MHz
typ
C
Slew Rate
G = +4, 2V Step
1100
V/
s
typ
C
Rise/Fall Time
G = +4, V
O
= 2V Step
2
ns
typ
C
Spurious Free Dynamic Range
V
O
= 2Vp-p, 5MHz, 100
67
dB
typ
C
V
O
= 2Vp-p, 100kHz, 100
87
dB
typ
C
Input Voltage Noise
2.0
nV/
Hz
typ
C
Non-Inverting Input Current Noise
14
pA/
Hz
typ
C
Inverting Input Current Noise
21
pA/
Hz
typ
C
Channel-to-Channel Crosstalk
f = 5MHz, Input Referred
80
dB
typ
C
DC PERFORMANCE
(4)
Open-Loop Transimpedance Gain
V
O
= 0V, R
L
= 100
125
90
85
80
k
min
A
Input Offset Voltage
V
CM
= 0V
0.8
4.0
5.5
6.0
mV
max
A
Average Offset Voltage Drift
V
CM
= 0V
35
40
V/
C
max
B
Non-Inverting Input Bias Current
V
CM
= 0V
10
30
45
55
A
max
A
Average Non-Inverting Input Bias Current Drift
V
CM
= 0V
250
350
nA/
C
max
B
Inverting Input Bias Current
V
CM
= 0V
10
30
45
55
A
max
A
Average Inverting Input Bias Current Drift
V
CM
= 0V
250
350
nA
/C
max
B
INPUT
(4)
Most Positive Input Voltage
3.7
3.4
3.3
3.2
V
min
A
Least Positive Input Voltage
1.3
1.6
1.7
1.8
V
max
A
Common-Mode Rejection Ratio(CMRR)
V
CM
= 2.5V, Input Referred
52
50
49
48
dB
min
A
Non-Inverting Input Impedance
250 || 2
k
|| pF
typ
C
Minimum Inverting Input Resistance
Open-Loop
29
20
min
B
Maximum Inverting Input Resistance
Open-Loop
29
37
max
B
OUTPUT
(4)
Most Positive Output Voltage
No Load
4.2
4.0
3.9
3.7
V
min
A
R
L
= 100
4.0
3.9
3.8
3.6
V
min
A
Least Positive Output Voltage
No Load
0.8
1.0
1.1
1.3
V
max
A
R
L
= 100
1.0
1.1
1.2
1.5
V
max
A
Current Output, Sourcing
V
O
= 2.5V
300
200
160
120
mA
min
A
Current Output, Sinking
V
O
= 2.5V
300
200
160
120
mA
min
A
Closed-Loop Output Impedance
G = +4, f = 100kHz
0.02
typ
C
Power Control (SO-14 only)
Maximum Logic 0
A0, A1
1.8
1.0
V
max
A
Minimum Logic 1
A0, A1
2.3
2.6
V
min
A
Logic Input Current
A0 = A1 = 0
50
100
A
max
A
Supply Current at Full Power
A0 = 1, A1 = 1
13.5
mA
typ
C
Supply Current at Power Cutback
A0 = 0, A1 = 1
11
mA
typ
C
Supply Current at Idle Power
A0 = 1, A1 = 0
2
mA
typ
C
Supply Current at Shutdown
A0 = 0, A1 = 0
0.8
mA
typ
C
Output Impedance in Idle Power
G = +4, f = 100kHz
0.1
typ
C
Output Impedance in Shutdown
100 || 4
k
|| pF
typ
C
Supply Current Step Time
10% to 90% Change
200
ns
typ
C
Output Switching Glitch
Inputs at GND
20
mV
typ
C
Shutdown Isolation
G = +4, 1MHz, A0 = 0, A1 = 0
85
dB
typ
C
POWER SUPPLY
Specified Operating Voltage
+5
V
typ
C
Maximum Operating Voltage
+12.6
+12.6
+12.6
V
max
A
Maximum Quiescent Current
V
S
= +5V, Full Power
13.5
14.5
15
15.5
mA
max
A
Minimum Quiescent Current
V
S
= +5V, Full Power
13.5
12.5
12
11.5
mA
min
A
Power Supply Rejection Ratio (PSRR)
f = 100kHz, Input Referred
52
dB
typ
C
TEMPERATURE RANGE
Specification: U, N
40 to +85
C
Thermal Resistance,
JA
U
SO-8
Junction-to-Ambient
125
C/W
H
PSO-8
55
C/W
N
SO-14
100
C/W
NOTES: (1) Test Levels: (A) 100% tested at 25
C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25
C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23
C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
V
CM
is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMRR at
CMIR limits.
4
OPA2677
ABSOLUTE MAXIMUM RATINGS
Power Supply ..............................................................................
6.5VDC
Internal Power Dissipation
(1)
............................ See Thermal Information
Differential Input Voltage ..................................................................
1.2V
Input Voltage Range ............................................................................
V
S
Storage Temperature Range: U, N, H ........................... 40
C to +125
C
Lead Temperature (soldering, 10s) .............................................. +300
C
Junction Temperature (T
J
) ........................................................... +175
C
NOTE:: (1) Packages must be derated based on specified
JA
. Maximum T
J
must be observed.
ELECTROSTATIC
DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from perfor-
mance degradation to complete device failure. Burr-Brown
Corporation recommends that all integrated circuits be handled
and stored using appropriate ESD protection methods.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet published specifica-
tions.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
PIN CONFIGURATIONS
Top View
SO-8, PSO-8
SO-14
PACKAGE
SPECIFIED
DRAWING
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
RANGE
MARKING
NUMBER
(1)
MEDIA
OPA2677U
SO-8 Surface Mount
182
40
C to +85
C
OPA2677U
OPA2677U
Rails
"
"
"
"
"
OPA2677U/2K5
Tape and Reel
OPA2677H
PSO-8 Surface Mount
182-1
40
C to +85
C
OPA2677H
--
Rails
"
"
"
"
"
--
Tape and Reel
OPA2677N
SO-14 Surface Mount
235
40
C to 85
C
OPA2677N
--
Rails
"
"
"
"
"
--
Tape and Reel
NOTE: (1) Models with a slash (/) are available only as Tape and Reel in the quantity indicated after the slash (e.g. /2K5 indicates 2500 devices per reel). Ordering 2500
pieces of the OPA2677U/2K5 will get a single 2500-piece Tape and Reel.
PACKAGE/ORDERING INFORMATION
1
2
3
4
8
7
6
5
+V
S
Out B
In B
+In B
OPA2677U, H
Out A
In A
+In A
V
S
1
2
3
4
5
6
7
14
13
12
11
10
9
8
In A
+In A
A0
V
S
A1
+In B
In B
Out A
NC
NC
+V
S
NC
NC
Out B
Power
Control
OPA2677N
5
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
=
6V
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
NON-INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
100
200
300
400
500
6
3
0
3
6
9
12
15
18
Normalized Gain (dB)
V
O
= 0.5Vp-p
See Figure 1.
G = +8
R
F
= 250
G = +2
R
F
= 475
G = +4
R
F
= 402
G = +1
R
F
= 511
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
100
200
300
400
500
6
3
0
3
6
9
12
15
18
Normalized Gain (dB)
V
O
= 0.5Vp-p
G = 8, R
F
= 280
G = 2, R
F
= 422
G = 8, R
F
= 280
G = 4, R
F
= 383
NON-INVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
100
200
300
400
500
18
15
12
9
6
3
0
3
6
9
12
15
Gain (dB)
G = +4, See Figure 1
V
O
= 10Vp-p
V
O
= 8Vp-p
V
O
= 2Vp-p
V
O
1Vp-p
INVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
100
200
300
400
500
18
15
12
9
6
3
0
3
6
9
12
15
Gain (dB)
G = 4
R
F
= 383
V
O
= 8Vp-p
V
O
= 10Vp-p
V
O
= 5Vp-p
V
O
1Vp-p
NON-INVERTING PULSE RESPONSE
Time (5ns/div)
Output Voltage (1V/div)
Output Voltage (100mV/div)
5Vp-p
G = +4
200mVp-p
Left Scale
Large Signal
Right Scale
Small Signal
INVERTING PULSE RESPONSE
Time (5ns/div)
Output Voltage (1V/div)
Output Voltage (100mV/div)
5Vp-p
Left Scale
Large Signal
Right Scale
200mVp-p
Small Signal
6
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
=
6V
(Cont.)
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
HARMONIC DISTORTION vs FREQUENCY
Frequency (MHz)
0.1
1
20
10
60
65
70
75
80
85
90
95
100
Harmonic Distortion (dBc)
V
O
= 2Vp-p
R
L
= 100
Single Channel. See text
for differential performance.
2nd-Harmonic
3rd-Harmonic
HARMONIC DISTORTION vs OUTPUT VOLTAGE
Output Voltage (Vp-p)
0.1
1
10
60
65
70
75
80
85
90
95
100
Harmonic Distortion (dBc)
F = 5MHz
R
L
= 100
2nd-Harmonic
3rd-Harmonic
Single Channel. See text for differential performance.
HARMONIC DISTORTION vs NON-INVERTING GAIN
Gain Magnitude (V/V)
1
60
65
70
75
80
85
90
95
100
10
Harmonic Distortion (dBc)
V
O
= 2Vp-p
f = 5MHz
R
L
= 100
2nd-Harmonic
3rd-Harmonic
Single Channel (see text for differential performance).
HARMONIC DISTORTION vs INVERTING GAIN
Gain Magnitude (V/V)
1
60
65
70
75
80
85
90
95
100
10
Harmonic Distortion (dBc)
V
O
= 2Vp-p
f = 5MHz
R
L
= 100
2nd-Harmonic
3rd-Harmonic
Single Channel (see text for differential performance).
HARMONIC DISTORTION vs LOAD RESISTANCE
Load Resistance (
)
10
100
1000
60
65
70
75
80
85
90
95
100
Harmonic Distortion (dBc)
Single Channel. See text
for differential performance.
V
O
= 2Vp-p
f = 5MHz
2nd-Harmonic
3rd-Harmonic
2-TONE, 3rd-ORDER
INTERMODULATION SPURIOUS
Single-Tone Load Power (dBm)
10
0
5
5
10
60
65
70
75
80
85
90
95
100
3rd-Order Spurious Level (dBc)
Figure 1
20MHz
5MHz
1MHz
Single Channel. See text
for differential performance.
10MHz
7
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
=
6V
(Cont.)
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
MAXIMUM OUTPUT SWING
vs LOAD RESISTANCE
Load Resistance (
)
10
6
5
4
3
2
1
0
1
2
3
4
5
6
100
1000
Output Voltage (V)
Figure 1
OUTPUT VOLTAGE AND CURRENT LIMITATIONS
I
O
(mA)
600
6
5
4
3
2
1
0
1
2
3
4
5
6
0
200
400
200
400
600
V
O
(V)
R
L
= 10
R
L
= 25
R
L
= 50
R
L
= 100
1W Internal Power
Single Ch.
1W Internal Power
Single Ch.
OUTPUT VOLTAGE AND CURRENT LIMITATIONS
Frequency (Hz)
10
2
100
10
1
10
5
10
6
10
4
10
3
10
7
Voltage Noise nV/
Hz
Current Noise pA/
Hz
Inverting Current Noise
20pA/
Hz
15pA/
Hz
2nV/
Hz
Voltage Noise
Non-Inverting Current Noise
CHANNEL-TO-CHANNEL CROSSTALK
Frequency (Hz)
10
6
10
7
10
8
60
65
70
75
80
85
90
95
100
Crosstalk, Input Referred (dB)
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
1
10
100
1000
90
80
70
60
50
40
30
20
10
0
R
S
(
)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
Frequency (Hz)
1M
2
0
2
4
6
8
10
10M
100M
1G
Normalized Gain to Capacitive
Load (dB)
C
L
= 10pF
C
L
= 22pF
C
L
= 100pF
C
L
= 47pF
1/2
OPA2677
402
R
S
133
1k
C
L
1k
is optional.
8
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
=
6V
(Cont.)
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
CMRR AND PSRR vs FREQUENCY
Frequency (Hz)
10
3
70
60
50
40
30
20
10
0
10
4
10
5
10
6
10
7
10
8
Power Supply Rejection Ratio (dB)
Common-Mode Rejection Ratio (dB)
CMRR
PSRR
+PSRR
OPEN-LOOP TRANSIMPEDANCE GAIN AND PHASE
Frequency (Hz)
10
4
10
5
10
6
10
7
10
8
10
9
120
100
80
60
40
20
0
Transimpedance Gain (20dB
/div)
0
45
90
135
180
225
270
Transimpedance Phase (45
/div)
CLOSED-LOOP OUTPUT IMPEDANCE
vs FREQUENCY
Frequency (Hz)
10
4
10
5
10
6
10
7
10
8
10
9
100
10
1
0.1
0.01
0.001
Output Impedance Magnitude (
)
COMPOSITE VIDEO dG/d
Number of 150
Loads
1
2
3
4
5
6
7
8
9
10
0.14
0.12
0.10.
0.08
0.06
0.04
0.02
0.00
dG/d
(%/
)
G = +2
R
F
= 475
V
S
=
5V
d
, Negative Video
d
, Positive Video
dG, Positive Video
dG, Negative Video
8
6
4
2
0
2
4
6
8
NON-INVERTING OVERDRIVE RECOVERY
Time (20ns/div)
Output Voltage (2V/div)
4
3
2
1
0
1
2
3
4
Input Voltage (1V/div)
G = +4
R
L
= 100
Figure 1
Input
Output
8
6
4
2
0
2
4
6
8
INVERTING OVERDRIVE RECOVERY
Time (20ns/div)
Output Voltage (2V/div)
4
3
2
1
0
1
2
3
4
Input Voltage (1V/div)
Input
Output
G = 4
R
L
= 100
9
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
=
6V
(Cont.)
At T
A
= +25
C, G = +4, R
F
= 402
, and R
L
= 100
, unless otherwise noted. See Figure 1 for AC performance only
TYPICAL DC ERROR DRIFT
vs TEMPERATURE
Ambient Temperature (
C)
55
10
8
6
4
2
0
2
4
6
8
10
35
15
5
25
45
65
85
105
125
Input Offset Voltage (mV)
Input Bias Current (
A)
Non-Inverting Bias Current
Input Offset Voltage
Inverting Bias Current
SUPPLY AND OUTPUT CURRENT
vs TEMPERATURE
Temperature (
C)
55
600
550
500
450
400
350
300
250
200
150
100
35
15
5
25
45
65
85
105
125
Output Current (mA)
50
40
30
20
10
0
Output Current (mA)
Sourcing Output Current
Sinking Output Current
Supply Current, Full Power
CMIR AND OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
Supply Voltage (
V)
2
3
4
5
6
5
4
3
2
1
0
6
Voltage Range (
V)
Output Voltage
No Load
+V Input Voltage
V Input Voltage
10
OPA2677
NON-INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
50
100
150
200
250
6
3
0
3
6
9
12
15
18
Normalized Gain (dB)
See Figure 2.
G = +1
R
F
= 536
G = +2
R
F
= 511
G = +4
R
F
= 453
G = +8
R
F
= 332
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
Frequency (MHz)
0
50
100
150
200
250
6
3
0
3
6
9
12
15
18
Normalized Gain (dB)
G = 8
R
F
= 332
G = 4
R
F
= 453
G = 2
R
F
= 511
G = 1
R
F
= 536
400
300
200
100
0
100
200
300
400
SMALL-SIGNAL PULSE RESPONSE
Time (5ns/div)
Output Voltage (100mV/div)
V
O
= 500mVp-p
See Figure 2.
TYPICAL PERFORMANCE CURVES: V
S
= +5V
At T
A
= +25
C, G = +4, R
F
= 453
, and R
L
= 100
to VS/2, unless otherwise noted. See Figure 2.
1.6
1.2
0.8
0.4
0
0.4
0.8
1.2
1.6
LARGE-SIGNAL PULSE RESPONSE
Time (5ns/div)
Output Voltage (400mV/div)
V
O
= 2Vp-p
See Figure 2.
RECOMMENDED R
S
vs CAPACITIVE LOAD
Capacitive Load (pF)
1
10
100
1000
50
45
40
35
30
25
20
15
10
5
0
R
S
(
)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
Frequency (Hz)
1M
2
0
2
4
6
8
10
10M
100M
1G
Normalized Gain to Capacitive
Load (dB)
C
L
= 10pF
C
L
= 22pF
C
L
= 47pF
453
150
5k
5k
1k
1k
Load Optional.
1/2
OPA2677
V
I
+5V
0.1
F
V
O
R
S
C
L
0.1
F
C
L
= 100pF
11
OPA2677
TYPICAL PERFORMANCE CURVES: V
S
= +5V
(Cont.)
At T
A
= +25
C, G = +4, R
F
= 453
, and R
L
= 100
, unless otherwise noted. See Figure 2 for AC performance only.
HARMONIC DISTORTION vs FREQUENCY
Frequency (MHz)
0.1
1
20
10
50
55
60
65
70
75
80
85
90
Harmonic Distortion (dBc)
V
O
= 2Vp-p
R
L
= 100
to V
S
/2
Single Channel. See Figure 2.
2nd-Harmonic
3rd-Harmonic
HARMONIC DISTORTION vs OUTPUT VOLTAGE
Output Voltage (Vp-p)
0.1
1
2
50
55
60
65
70
75
80
85
90
Harmonic Distortion (dBc)
f = 5MHz
R
L
= 100
to V
S
/2
Single Channel.
See Figure 2.
3rd-Harmonic
2nd-Harmonic
HARMONIC DISTORTION vs NON-INVERTING GAIN
Gain Magnitude (V/V)
1
50
55
60
65
70
75
80
85
90
10
Harmonic Distortion (dBc)
2nd-Harmonic
3rd-Harmonic
Single Channel
V
O
= 2Vp-p
f = 5MHz
R
L
= 100
to V
S
/2
HARMONIC DISTORTION vs INVERTING GAIN
Gain (V/V)
1
50
55
60
65
70
75
80
85
90
10
Harmonic Distortion (dBc)
2nd-Harmonic
3rd-Harmonic
Single Channel
V
O
= 2Vp-p
f = 5MHz
R
L
= 100
to V
S
/2
HARMONIC DISTORTION vs LOAD RESISTANCE
Load Resistance (
)
10
100
1000
50
55
60
65
70
75
80
85
90
Harmonic Distortion (dBc)
Single Channel.
V
O
= 2Vp-p
f = 5MHz
2nd-Harmonic
3rd-Harmonic
2-TONE, 3rd-ORDER SPURIOUS LEVEL
Single-Tone Load Power (dBm)
10
0
5
5
10
50
55
60
65
70
75
80
85
90
3rd-Order Spurious Level (dBc)
20MHz
5MHz
1MHz
Single Channel. See Figure 2.
10MHz
12
OPA2677
APPLICATIONS INFORMATION
WIDEBAND CURRENT FEEDBACK OPERATION
The OPA2677 gives the exceptional AC performance of a
wideband current feedback op amp with a highly linear, high
power output stage. Requiring only 9mA/ch. quiescent cur-
rent, the OPA2677 will swing to within 1V of either supply
rail and deliver in excess of 380mA guaranteed at room
temperature. This low output headroom requirement, along
with supply voltage independent biasing, gives remarkable
single (+5V) supply operation. The OPA2677 will deliver
greater than 150MHz bandwidth driving a 2Vp-p output into
100
on a single +5V supply. Previous boosted output stage
amplifiers have typically suffered from very poor crossover
distortion as the output current goes through zero. The
OPA2677 achieves a comparable power gain with much
better linearity. The primary advantage of a current feedback
op amp over a voltage feedback op amp is that AC perfor-
mance (bandwidth and distortion) is relatively independent
of signal gain.
Figure 1 shows the DC coupled, gain of +4, dual power
supply circuit configuration used as the basis of the
6V
Specifications and Typical Performance Curves. For test
purposes, the input impedance is set to 50
with a resistor
to ground and the output impedance is set to 50
with a
series output resistor. Voltage swings reported in the speci-
fications are taken directly at the input and output pins while
load powers (dBm) are defined at a matched 50
load. For
the circuit of Figure 1, the total effective load will be 100
|| 537
= 84
.
Figure 2 shows the AC coupled, gain of +4, single supply
circuit configuration used as the basis of the +5V Specifica-
tions and Typical Performance Curves. Though not a "rail-
to-rail" design, the OPA2677 requires minimal input and
output voltage headroom compared to other very wideband
current feedback op amps. It will deliver a 3Vp-p output
swing on a single +5V supply with greater than 100MHz
bandwidth. The key requirement of broadband single supply
operation is to maintain input and output signal swings
within the usable voltage ranges at both the input and the
output. The circuit of Figure 2 establishes an input midpoint
bias using a simple resistive divider from the +5V supply
(two 806
resistors). The input signal is then AC coupled
into this midpoint voltage bias. The input voltage can swing
to within 1.3V of either supply pin, giving a 2.4Vp-p input
signal range centered between the supply pins. The input
impedance matching resistor (57.6
) used for testing is
adjusted to give a 50
input match when the parallel
combination of the biasing divider network is included. The
gain resistor (R
G
) is AC coupled, giving the circuit a DC
gain of +1--which puts the input DC bias voltage (2.5V) on
the output as well. The feedback resistor value has been
adjusted from the bipolar supply condition to re-optimize for
a flat frequency response in +5V, gain of +4, operation.
Again, on a single +5V supply, the output voltage can swing
to within 1V of either supply pin while delivering more than
200mA output current. A demanding 100
load to a mid-
point bias is used in this characterization circuit. The new
output stage used in the OPA2677 can deliver large bipolar
output currents into this midpoint load with minimal cross-
over distortion, as shown by the +5V supply, harmonic
distortion plots.
FIGURE 1. DC-Coupled, G = +4, Bipolar Supply, Specifi-
cation and Test Circuit.
FIGURE 2. AC-Coupled, G = +4, Single Supply Specifica-
tion and Test Circuit.
1/2
OPA2677
+6V
+
6V
50
Load
50
50
V
O
V
I
50
Source
R
G
133
R
F
402
+
6.8
F
0.1
F
6.8
F
0.1
F
+V
S
V
S
1/2
OPA2677
+5V
+V
S
V
S
/2
806
100
V
O
V
I
57.6
806
R
F
453
R
G
150
0.1
F
0.1
F
6.8
F
+
0.1
F
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