March 2002
1
MIC922
MIC922
Micrel
MIC922
230MHz Low-Power SC-70 Op Amp
Final Information
General Description
The MIC922 is a high-speed operational amplifier with a gain-
bandwidth product of 230MHz. The part is unity gain stable.
It has a very low 2.5mA supply current, and features the
TeenyTM SC-70 package.
Supply voltage range is from
2.5V to
9V, allowing the
MIC922 to be used in low-voltage circuits or applications
requiring large dynamic range.
The MIC922 is stable driving any capacitative load and
achieves excellent PSRR and CMRR, making it much easier
to use than most conventional high-speed devices. Low
supply voltage, low power consumption, and small packing
make the MIC922 ideal for portable equipment. The ability to
drive capacitative loads also makes it possible to drive long
coaxial cables.
Features
230MHz gain bandwidth product
400MHz 3dB bandwidth
2.5mA supply current
SC-70 package
1500V/
s slew rate
Drives any capacitive load
Unity gain stable
Applications
Video
Imaging
Ultrasound
Portable equipment
Line drivers
Ordering Information
Part Number
Junction Temp. Range
Package
MIC922BC5
40
C to +85
C
SC-70
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Pin Description
Pin Number
Pin Name
Pin Function
1
IN+
Noninverting Input
2
V
Negative Supply (Input)
3
IN
Inverting Input
4
OUT
Output: Amplifier Output
5
V+
Positive Supply (Input)
Pin Configuration
IN+
V
OUT
IN
1
3
4
5
2
V+
A39
Part
Identification
SC-70
Functional Pinout
IN+
V
OUT
IN
1
3
4
5
2
V+
SC-70
Teeny is a trademark of Micrel, Inc.
MIC922
Micrel
MIC922
2
March 2002
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
V
V
) ........................................... 20V
Differential Input Voltage (
V
IN+
V
IN
) .......... 4V, Note 3
Input Common-Mode Range (V
IN+
, V
IN
) .......... V
V+
to V
V
Lead Temperature (soldering, 5 sec.) ....................... 260
C
Storage Temperature (T
S
) ........................................ 150
C
ESD Rating, Note 4 ................................................... 1.5kV
Operating Ratings
(Note 2)
Supply Voltage (V
S
) .......................................
2.5V to
9V
Junction Temperature (T
J
) ......................... 40
C to +85
C
Package Thermal Resistance
SC-70-5
(
JA
) .................................................... 450
C/W
Electrical Characteristics (
5V)
V+ = +5V, V = 5V, V
CM
= 0V, R
L
= 10M
; T
J
= 25
C, bold values indicate 40
C
T
J
+85
C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OS
Input Offset Voltage
-5
0.8
5
mV
V
OS
V
OS
Temperature Coefficient
15
V/
C
I
B
Input Bias Current
1.7
4.5
A
I
OS
Input Offset Current
-2
0.3
2
A
V
CM
Input Common-Mode Range
3.25
+3.25
V
CMRR
Common-Mode Rejection Ratio
2.5V < V
CM
< +2.5V
75
80
dB
PSRR
Power Supply Rejection Ratio
3.5V < V
S
<
9V
68
87
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 2k
, V
OUT
=
2V
65
74
dB
R
L
= 100
, V
OUT
=
1V
77
dB
V
OUT
Maximum Output Voltage Swing
positive, R
L
= 2k
+3
3.6
V
negative, R
L
= 2k
3.6
3
V
positive, R
L
= 100
+2.7
3.0
V
negative, R
L
= 100
, Note 5
2.6
2.3
V
GBW
Unity Gain-Bandwidth Product
C
L
= 1.7pF
200
MHz
PM
Phase Margin
C
L
= 1.7pF
49
BW
3dB Bandwidth
Av = 1, C
L
= 1.7pF
320
MHz
SR
Slew Rate
C=1.7pF, Gain=1, V
OUT
=4V
PP
420
V/
s
negative SR = 360V/
s
I
SC
Short-Circuit Output Current
source
65
78
mA
sink
40
47
mA
I
S
Supply Current
No Load
2.5
3
mA
Input Voltage Noise
f = 10kHz
9
nV/
Hz
Input Current Noise
f = 10kHz
1.1
pA/
Hz
Electrical Characteristics
V+ = +9V, V = 9V, V
CM
= 0V, R
L
= 10M
; T
J
= 25
C, bold values indicate 40
C
T
J
+85
C; unless noted
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OS
Input Offset Voltage
-5
0.4
5
mV
V
OS
Input Offset Voltage
15
V/
C
Temperature Coefficient
I
B
Input Bias Current
1.7
4.5
A
I
OS
Input Offset Current
0.3
2
A
V
CM
Input Common-Mode Range
7.25
+7.25
V
CMRR
Common-Mode Rejection Ratio
6.5V < V
CM
< +6.5V
58
83
dB
PSRR
Power Supply Rejection Ratio
3.5V < V
S
<
9V
68
87
dB
March 2002
3
MIC922
MIC922
Micrel
Symbol
Parameter
Condition
Min
Typ
Max
Units
A
VOL
Large-Signal Voltage Gain
R
L
= 2k
, V
OUT
=
3V
65
76
dB
R
L
= 100
, V
OUT
=
1V
86
dB
V
OUT
Maximum Output Voltage Swing
positive, R
L
= 2k
7
7.5
V
negative, R
L
= 2k
7.5
7
V
GBW
Unity Gain-Bandwidth Product
C
L
= 1.7pF
230
MHz
PM
Phase Margin
C
L
= 1.7pF
44
BW
3dB Bandwidth
A
V
= 1, C
L
= 1.7pF
400
MHz
SR
Slew Rate
C=1.7pF, Av =1, V
OUT
=8V
PP
,
1500
V/
s
positive SR = 750V/
s
I
SC
Short-Circuit Output Current
source
70
84
mA
sink
40
50
mA
I
S
Supply Current
No Load
2.5
3
mA
Input Voltage Noise
f = 10kHz
9
nV/
Hz
Input Current Noise
f = 10kHz
1.1
pA/
Hz
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3.
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to change).
Note 4.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 5.
Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in "Typical Characteristics."
MIC922
Micrel
MIC922
4
March 2002
Test Circuits
2k
10k
10k
10k
0.1
F
0.1
F
0.1
F
10
F
50
50
50
0.1
F
10
F
All resistors:
1% metal film
Output
Input
Input
V+
V
MIC922
4
5
3
1
2
BNC
BNC
BNC
PSRR vs. Frequency
R2 4k
S2
S1
0.1
F
10
F
0.1
F
10
F
10pF
10pF
V+
V
MIC922
4
5
3
1
2
BNC
R4 27k
R3 27k
R1
20
R5
20
100pF
To
Dynamic
Analyzer
Noise Measurement
0.1
F
10
F
0.1
F
10
F
V+
V
MIC922
4
5
3
1
2
BNC
R7c 2k
R7b 200
R7a 100
Input
R6
5k
R2
5k
R3
200k
R4
250
R5
5k
Output
R1 5k
BNC
All resistors 1%
V
V
R2
R1
R2
R
R4
OUT
ERROR
=
+
+
+
+
1
5
R7
CMRR vs. Frequency
V+
V
IN
V
MIC922
4
5
3
1
2
300
50
V
OUT
FET Probe
C
L
0.1
F
10
F
0.1
F
10
F
Closed Loop Frequency Response Measurement
March 2002
5
MIC922
MIC922
Micrel
Typical Characteristics
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
-40 -20
0
20
40
60
80 100
SUPPLY CURRENT (mA)
TEMPERATURE (
C)
Supply Current
vs. Temperature
V
=
9V
V
=
2.5V
V
=
5V
0
0.2
0.4
0.6
0.8
1
1.2
1.4
-40 -20
0
20
40
60
80 100
OFFSET VOLTAGE (mV)
TEMPERATURE (
C)
Offset Voltage
vs. Temperature
V
=
2.5V
V
=
9V
V
=
5V
0
0.5
1
1.5
2
2.5
3
-40 -20
0
20
40
60
80 100
INPUT BIAS CURRENT (
A)
TEMPERATURE (
C)
Bias Current
vs. Temperature
V
=
5V
V
=
2.5V
V
=
9V
-3
-2
-1
0
1
2
3
4
5
6
7
8
-5 -4 -3 -2 -1 0
1
2
3
4
5
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage
vs. Common-Mode Voltage
V
=
5V
40
C
25
C
85
C
-3
-2
-1
0
1
2
3
4
5
6
7
8
-9.0
-7.2
-5.4
-3.6
-1.8
0
1.8
3.6
5.4
7.2
9.0
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage
vs. Common-Mode Voltage
85
C
25
C
40
C
V
=
9V
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
10 20 30 40 50 60 70 80
OUTPTU VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
25
C
40
C
85
C
Sourcing
V
=
5V
0
0.9
1.8
2.7
3.6
4.5
5.4
6.3
7.2
8.1
9.0
9.9
0 10 20 30 40 50 60 70 80 90
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
40
C
+85
C
+25
C
Sourcing
V
=
9V
-5.0
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
-50-45-40-35-30-25-20-15-10 -5 0
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
40
C
25
C
Sinking
V
=
5V
85
C
-60
-54
-48
-42
-36
-30
-24
-18
-12
-6
0
6
2.0
2.7
3.4
4.1
4.8
5.5
6.2
6.9
7.6
8.3
9.0
NOISE VOLTAGE (nV/HZ)
SUPPLY VOLTAGE (
V)
Short Circuit Current
vs. Supply Voltage
Sinking
85
C
25
C
40
C
0
9
18
27
36
45
54
63
72
81
90
99
2.0
2.7
3.4
4.1
4.8
5.5
6.2
6.9
7.6
8.3
9.0
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (
V)
Short-Circuit Current
vs. Supply Voltage
40
C
85
C
25
C
Sourcing
-9.0
-8.1
-7.2
-6.3
-5.4
-4.5
-3.6
-2.7
-1.8
-0.9
0.0
0.9
-60-54-48-42-36-30-24-18-12 -6 0
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Votage
vs. Output Current
40
C
85
C
25
C
Sinking
V
=
9V
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5
SUPPLY CURRENT (mA)
SUPPLY VOLTAGE (V)
Supply Current
vs. Supply Voltage
40
C
25
C
85
C
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