OPA340/2340/4340

Out D

In D

+In D

+In C

In C

Out C

Out A

In A

+In A

+In B

In B

Out B

OPA4340

SSOP-16

V+

Out B

In B

+In B

Out A

In A

+In A

OPA2340

8-Pin DIP, SO-8, MSOP-8

V+

Output

+In

OPA340

8-Pin DIP, SO-8

V+

Out

+In

OPA340

SOT-23-5

SINGLE-SUPPLY, RAIL-TO-RAIL

OPERATIONAL AMPLIFIERS

Micro

Amplifier

Series

FEATURES

RAIL-TO-RAIL INPUT

RAIL-TO-RAIL OUTPUT (within 1mV)

Micro

SIZE PACKAGES

WIDE BANDWIDTH: 5.5MHz

HIGH SLEW RATE: 6V/

LOW THD+NOISE: 0.0007% (f = 1kHz)

LOW QUIESCENT CURRENT: 750

A/channel

SINGLE, DUAL, AND QUAD

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/ · FAXLine: (800) 548-6133 (US/Canada Only) · Cable: BBRCORP · Telex: 066-6491 · FAX: (520) 889-1510 · Immediate Product Info: (800) 548-6132

APPLICATIONS

DRIVING A/D CONVERTERS

PCMCIA CARDS

DATA ACQUISITION

PROCESS CONTROL

AUDIO PROCESSING

COMMUNICATIONS

ACTIVE FILTERS

TEST EQUIPMENT

DESCRIPTION

OPA340 series rail-to-rail CMOS operational amplifi-
ers are optimized for low voltage, single supply opera-
tion. Rail-to-rail input/output and high speed operation
make them ideal for driving sampling analog-to-digital
converters. They are also well suited for general pur-
pose and audio applications as well as providing I/V
conversion at the output of D/A converters. Single,
dual, and quad versions have identical specifications
for design flexibility.

The OPA340 series operates on a single supply as low as
2.5V with an input common-mode voltage range that
extends 500mV below ground and 500mV above the
positive supply. Output voltage swing is to within 1mV

of the supply rails with a 100k

load. They offer excel-

lent dynamic response (BW = 5.5MHz, SR = 6V/

s), yet

quiescent current is only 750

A. Dual and quad designs

feature completely independent circuitry for lowest
crosstalk and freedom from interaction.

The single (OPA340) packages are the tiny 5-lead
SOT-23-5 surface mount, SO-8 surface mount, and
8-pin DIP. The dual (OPA2340) comes in the minia-
ture MSOP-8 surface mount, SO-8 surface mount,
and 8-pin DIP packages. The quad (OPA4340) pack-
ages are the space-saving SSOP-16 surface mount,
SO-14 surface mount, and the 14-pin DIP. All are
specified from 40

C to +85

C and operate from

C to +125

C. A SPICE macromodel is available

for design analysis.

OPA4340

OPA340

OPA2340

OPA4340

OPA340

OPA2340
OPA4340

PDS-1404C

Printed in U.S.A. December, 1997

OPA340/2340/4340

SPECIFICATIONS: V

= 2.7V to 5V

At T

= +25

C, R

= 10k

connected to V

/2 and V

OUT

= V

/2, unless otherwise noted.

Boldface limits apply over the specified temperature range, T

= 40

C to +85

C. V

= 5V.

PARAMETER

CONDITION

MIN

TYP

(1)

MAX

UNITS

OFFSET VOLTAGE
Input Offset Voltage

= 5V

150

500

vs Temperature

/dT

2.5

vs Power Supply

PSRR

= 2.7V to 5.5V, V

= 0V

120

V/V

= 40

C to +85

= 2.7V to 5.5V, V

= 0V

120

V/V

Channel Separation, dc

0.2

V/V

INPUT BIAS CURRENT
Input Bias Current

0.2

= 40

C to +85

Input Offset Current

0.2

NOISE
Input Voltage Noise, f = 0.1 to 50kHz

Vrms

Input Voltage Noise Density, f = 1kHz

nV/

Current Noise Density, f = 1kHz

fA/

INPUT VOLTAGE RANGE
Common-Mode Voltage Range

0.3

(V+) +0.3

Common-Mode Rejection Ratio

CMRR

0.3V < V

< (V+) 1.8V

= 5V, 0.3V

< V

< 5.3V

= 2.7V, 0.3V

< V

< 3V

INPUT IMPEDANCE
Differential

|| 3

|| pF

Common-Mode

|| 6

|| pF

OPEN-LOOP GAIN
Open-Loop Voltage Gain

= 100k

, 5mV < V

< (V+) 5mV

106

124

= 40

C to +85

= 100k

, 5mV < V

< (V+) 5mV

106

= 10k

, 50mV < V

< (V+) 50mV

100

120

= 40

C to +85

= 10k

, 50mV < V

< (V+) 50mV

100

= 2k

, 200mV < V

< (V+) 200mV

114

= 40

C to +85

= 2k

, 200mV < V

< (V+) 200mV

FREQUENCY RESPONSE
Gain-Bandwidth Product

GBW

G = 1

5.5

MHz

Slew Rate

= 5V, G = 1, C

= 100pF

Settling Time, 0.1%

= 5V, 2V Step, C

= 100pF

0.01%

= 5V, 2V Step, C

= 100pF

1.6

Overload Recovery Time

· G = V

0.2

Total Harmonic Distortion + Noise

THD+N

= 5V, V

= 3Vp-p

(2)

, G = 1, f = 1kHz

0.0007

OUTPUT
Voltage Output Swing from Rail

(3)

= 100k

, A

106dB

= 40

C to +85

= 100k

106dB

= 10k

100dB

= 40

C to +85

= 10k

, A

100dB

= 2k

94dB

200

= 40

C to +85

= 2k

, A

94dB

200

Short-Circuit Current

Capacitive Load Drive

LOAD

See Typical Curve

POWER SUPPLY
Specified Voltage Range

2.7

Operating Voltage Range

2.5 to 5.5

Quiescent Current (per amplifier)

= 0, V

= +5V

750

950

= 40

C to +85

= 0, V

= +5V

1100

TEMPERATURE RANGE
Specified Range

+85

Operating Range

+125

Storage Range

+125

Thermal Resistance

SOT-23-5 Surface Mount

200

C/W

MSOP-8 Surface Mount

150

C/W

SO-8 Surface Mount

150

C/W

8-Pin DIP

100

C/W

SSOP-16 Surface Mount

100

C/W

SO-14 Surface Mount

100

C/W

14-Pin DIP

C/W

NOTES: (1) V

= +5V. (2) V

OUT

= 0.25V to 3.25V. (3) Output voltage swings are measured between the output and power supply rails.

OPA340NA, PA, UA

OPA2340EA, PA, UA
OPA4340EA, PA, UA

OPA340/2340/4340

Out D

In D

+In D

+In C

In C

Out C

Out A

In A

+In A

V+

+In B

In B

Out B

OPA4340

PACKAGE/ORDERING INFORMATION

Supply Voltage ................................................................................... 5.5V
Signal Input Terminals, Voltage

(2)

.................... (V) 0.5V to (V+) +0.5V

Current

(2)

.................................................... 10mA

Output Short-Circuit

(3)

.............................................................. Continuous

Operating Temperature ................................................. 55

C to +125

Storage Temperature ..................................................... 55

C to +125

Junction Temperature ...................................................................... 150

Lead Temperature (soldering, 10s) ................................................. 300

NOTES: (1) Stresses above these ratings may cause permanent damage.
(2) Input terminals are diode-clamped to the power supply rails. Input signals
that can swing more than 0.5V beyond the supply rails should be current-
limited to 10mA or less. (3) Short-circuit to ground, one amplifier per
package.

ABSOLUTE MAXIMUM RATINGS

(1)

PIN CONFIGURATIONS

Top View

SOIC/DIP

PACKAGE

SPECIFIED

DRAWING

TEMPERATURE

PACKAGE

ORDERING

TRANSPORT

PRODUCT

PACKAGE

NUMBER

(1)

RANGE

MARKING

NUMBER

(2)

MEDIA

Single
OPA340NA

5-Lead SOT-23-5

331

C to +85

A40

OPA340NA-250

Tape and Reel

OPA340NA-3K

Tape and Reel

OPA340PA

8-Pin DIP

006

C to +85

OPA340PA

Rails

OPA340UA

SO-8 Surface-Mount

182

C to +85

OPA340UA

Rails

(3)

Dual
OPA2340EA

MSOP-8 Surface-Mount

337

C to +85

A40A

OPA2340EA-250

Tape and Reel

OPA2340EA-2500

Tape and Reel

OPA2340PA

8-Pin DIP

006

C to +85

OPA2340PA

Rails

OPA2340UA

SO-8 Surface-Mount

182

C to +85

OPA2340UA

Rails

(3)

Quad
OPA4340EA

SSOP-16 Surface-Mount

322

C to +85

OPA4340EA

OPA4340EA-250

Tape and Reel

OPA4340EA-2500

Tape and Reel

OPA4340PA

14-Pin DIP

010

C to +85

OPA4340PA

Rails

OPA4340UA

SO-14 Surface Mount

235

C to +85

OPA4340UA

Rails

(3)

NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with -250, -2500, and
-3K are available only in Tape and Reel in the quantities indicated (e.g., -250 indicates 250 devices per reel). Ordering 3000 pieces of "OPA340NA-3K" will get
a single 3000 piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. (3) SO-8 and SO-14
models also available in Tape and Reel.

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.

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degrada-
tion 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 its
published specifications.

OPA340/2340/4340

TYPICAL PERFORMANCE CURVES

At T

= +25

C, V

= +5V, and R

= 10k

connected to V

/2, unless otherwise noted.

CLOSED-LOOP OUTPUT IMPEDANCE

vs FREQUENCY

Output Resistance (

)

Frequency (Hz)

100

10k

100k

10M

G = 100

G = 10

G = 1

CHANNEL SEPARATION vs FREQUENCY

Frequency (Hz)

Channel Separation (dB)

140

130

120

110

100

10k

100k

G = 1, All Channels

OPEN-LOOP GAIN/PHASE vs FREQUENCY

0.1

160

140

120

100

Voltage Gain (dB)

135

180

Phase (°)

Frequency (Hz)

100

10k

100k

10M

INPUT VOLTAGE AND CURRENT NOISE

SPECTRAL DENSITY vs FREQUENCY

10k

100

0.1

Voltage Noise (nV

Hz)

Frequency (Hz)

100

10k

100k

Current Noise (fA

Hz)

Current Noise

Voltage Noise

TOTAL HARMONIC DISTORTION + NOISE

vs FREQUENCY

0.1

0.01

0.001

0.0001

THD+N (%)

Frequency (Hz)

100

10k

20k

= 600

G = 10

G = 1

= 2k

= 10k

= 600

= 10k

POWER SUPPLY and COMMON-MODE

REJECTION vs FREQUENCY

100

PSRR, CMRR (dB)

Frequency (Hz)

100

10k

100k

PSRR

CMRR

OPA340/2340/4340

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

= +5V, and R

= 10k

connected to V

/2, unless otherwise noted.

QUIESCENT CURRENT vs TEMPERATURE

1000

900

800

700

600

500

Quiescent Current (µA)

Temperature (°C)

100

125

Per Amplifier

SHORT-CIRCUIT CURRENT vs TEMPERATURE

Temperature (°C)

Short-Circuit Current (mA)

100

125

SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE

Supply Voltage (V)

Short-Circuit Current (mA)

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

COMMON-MODE REJECTION vs TEMPERATURE

100

CMRR (dB)

Temperature (°C)

100

125

= 5V, V

= 0.3V to 5.3V

= 2.7V, V

= 0.3V to 3V

= 2.7V to 5V, V

= 0.3V to (V+) 1.8V

QUIESCENT CURRENT vs SUPPLY VOLTAGE

Supply Voltage (V)

Quiescent Current (

800

750

700

650

600

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Per Amplifier

OPEN-LOOP GAIN AND POWER SUPPLY REJECTION

vs TEMPERATURE

130

120

110

100

, PSRR (dB)

Temperature (°C)

100

125

= 100k

= 10k

= 2k

PSRR

OPA340/2340/4340

INPUT BIAS CURRENT vs TEMPERATURE

Input Bias Current (pA)

Temperature (°C)

100

125

100

0.1

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

= +5V, and R

= 10k

connected to V

/2, unless otherwise noted.

INPUT BIAS CURRENT

vs INPUT COMMON-MODE VOLTAGE

Common-Mode Voltage (V)

Input Bias Current (pA)

1.0

0.8

0.6

0.4

0.2

0.4

0.6

0.8

1.0

OUTPUT VOLTAGE SWING vs OUTPUT CURRENT

Output Current (mA)

Output Voltage (V)

±10

±20

±30 ±40

±50 ±60

±70 ±80

±90 ±100

+125°C

+25°C

55°C

+125°C

+25°C

55°C

OFFSET VOLTAGE DRIFT MAGNITUDE

PRODUCTION DISTRIBUTION

Percent of Amplifiers (%)

Offset Voltage Drift (µV/°C)

Typical production
distribution of
packaged units.

10 11 12 13 15

MAXIMUM OUTPUT VOLTAGE vs FREQUENCY

10M

Frequency (Hz)

100k

Output Voltage (Vp-p)

= 5.5V

= 2.7V

Maximum output
voltage without
slew rate-induced
distortion.

OFFSET VOLTAGE

PRODUCTION DISTRIBUTION

Percent of Amplifiers (%)

Offset Voltage (µV)

Typical production
distribution of
packaged units.

500

400

300

200

100

200

300

400

500

OPA340/2340/4340

APPLICATIONS INFORMATION

OPA340 series op amps are fabricated on a state-of-the-art
0.6 micron CMOS process. They are unity-gain stable and
suitable for a wide range of general purpose applications.
Rail-to-rail input/output make them ideal for driving sam-
pling A/D converters. In addition, excellent ac performance
makes them well-suited for audio applications. The class AB
output stage is capable of driving 600

loads connected to

any point between V+ and ground.

Rail-to-rail input and output swing significantly increases
dynamic range, especially in low supply applications.
Figure 1 shows the input and output waveforms for the
OPA340 in unity-gain configuration. Operation is from a
single +5V supply with a 10k

load connected to V

/2.

The input is a 5Vp-p sinusoid. Output voltage is approxi-
mately 4.98Vp-p.

Power supply pins should be bypassed with 0.01

F ceramic

capacitors.

OPERATING VOLTAGE

OPA340 series op amps are fully specified from +2.7V to
+5V. However, supply voltage may range from +2.5V to
+5.5V. Parameters are guaranteed over the specified supply
range--a unique feature of the OPA340 series. In addition,
many specifications apply from 40

C to +85

C. Most

behavior remains virtually unchanged throughout the full
operating voltage range. Parameters which vary signifi-
cantly with operating voltages or temperature are shown in
the typical performance curves.

RAIL-TO-RAIL INPUT

The input common-mode voltage range of the OPA340
series extends 500mV beyond the supply rails. This is
achieved with a complementary input stage--an N-channel
input differential pair in parallel with a P-channel differen-
tial pair (see Figure 2). The N-channel pair is active for input
voltages close to the positive rail, typically
(V+) 1.3V to 500mV above the positive supply, while the
P-channel pair is on for inputs from 500mV below the
negative supply to approximately (V+) 1.3V. There is a
small transition region, typically (V+) 1.5V to (V+) 1.1V,
in which both pairs are on. This 400mV transition region
can vary

300mV with process variation. Thus, the transi-

tion region (both stages on) can range from (V+) 1.8V to
(V+) 1.4V on the low end, up to (V+) 1.2V to (V+) 0.8V
on the high end.

FIGURE 2. Simplified Schematic.

= +5, G = +1, R

= 10k

2V/div

FIGURE 1. Rail-to-Rail Input and Output.

BIAS1

BIAS2

Class AB

Control

Circuitry

(Ground)

V+

Reference

Current

OUT

OPA340/2340/4340

OPA340 series op amps are laser-trimmed to the reduce
offset voltage difference between the N-channel and
P-channel input stages, resulting in improved common-
mode rejection and a smooth transition between the
N-channel pair and the P-channel pair. However, within the
400mV transition region PSRR, CMRR, offset voltage,
offset drift, and THD may be degraded compared to opera-
tion outside this region.

A double-folded cascode adds the signal from the two input
pairs and presents a differential signal to the class AB output
stage. Normally, input bias current is approximately 200fA,
however, input voltages exceeding the power supplies by
more than 500mV can cause excessive current to flow in or
out of the input pins. Momentary voltages greater than
500mV beyond the power supply can be tolerated if the
current on the input pins is limited to 10mA. This is easily
accomplished with an input resistor as shown in Figure 3.
Many input signals are inherently current-limited to less
than 10mA, therefore, a limiting resistor is not required.

CAPACITIVE LOAD AND STABILITY

OPA340 series op amps can drive a wide range of capacitive
loads. However, all op amps under certain conditions may
become unstable. Op amp configuration, gain, and load
value are just a few of the factors to consider when determin-
ing stability. An op amp in unity gain configuration is the
most susceptible to the effects of capacitive load. The
capacitive load reacts with the op amp's output resistance,
along with any additional load resistance, to create a pole in
the small-signal response which degrades the phase margin.
In unity gain, OPA340 series op amps perform well, with a
pure capacitive load up to approximately 1000pF. Increasing
gain enhances the amplifier's ability to drive more capaci-
tance. See the typical performance curve "Small-Signal
Overshoot vs Capacitive Load."

One method of improving capacitive load drive in the unity
gain configuration is to insert a 10

to 20

resistor in series

with the output, as shown in Figure 4. This significantly
reduces ringing with large capacitive loads. However, if
there is a resistive load in parallel with the capacitive load,
it creates a voltage divider introducing a dc error at the
output and slightly reduces output swing. This error may be
insignificant. For instance, with R

= 10k

and R

= 20

there is only about a 0.2% error at the output.

DRIVING A/D CONVERTERS

OPA340 series op amps are optimized for driving medium
speed (up to 100kHz) sampling A/D converters. However,
they also offer excellent performance for higher speed
converters. The OPA340 series provides an effective means
of buffering the A/D's input capacitance and resulting
charge injection while providing signal gain.

Figures 5 and 6 show the OPA340 driving an ADS7816.
The ADS7816 is a 12-bit, micro-power sampling converter
in the tiny MSOP-8 package. When used with the minia-
ture package options of the OPA340 series, the combina-
tion is ideal for space-limited and low power applications.
For further information consult the ADS7816 data sheet.

With the OPA340 in a noninverting configuration, an RC
network at the amplifier's output can be used to filter high
frequency noise in the signal (Figure 5). In the inverting
configuration, filtering may be accomplished with a ca-
pacitor across the feedback resistor (Figure 6).

FIGURE 3. Input Current Protection for Voltages Exceeding

the Supply Voltage.

OPAx340

10mA max

V+

OUT

OVERLOAD

RAIL-TO-RAIL OUTPUT

A class AB output stage with common-source transistors is
used to achieve rail-to-rail output. For light resistive loads
(>50k

), the output voltage is typically a few millivolts

from the supply rails. With moderate resistive loads (2k

50k

), the output can swing to within a few tens of milli-

volts from the supply rails and maintain high open-loop
gain. See the typical performanc curve "Output Voltage
Swing vs Output Current."

FIGURE 4. Series Resistor in Unity-Gain Configuration Improves Capacitive Load Drive.

OPAx340

V+

OUT

OPA340/2340/4340

FIGURE 5. OPA340 in Noninverting Configuration Driving ADS7816.

FIGURE 6. OPA340 in Inverting Configuration Driving ADS7816.

FIGURE 7. Speech Bandpass Filter.

ADS7816

12-Bit A/D

DCLOCK

OUT

CS/SHDN

OPA340

+5V

V+

+In

REF

GND

Serial

Interface

0.1µF

NOTE: A/D Input = 0 to V

REF

330pF

= 0V to 5V for 0V to 5V output.

ADS7816

12-Bit A/D

DCLOCK

OUT

CS/SHDN

OPA340

+5V

V+

+In

REF

GND

Serial

Interface

0.1µF

NOTE: A/D Input = 0 to V

REF

= 0V to 5V for

0V to 5V output.

RC network filters high frequency noise.

500

3300pF

243k

10M

1.74M

220pF

47pF

200pF

1/2

OPA2340

+5V

1/2

OPA2340

Filters 160Hz to 2.4kHz

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: OPA2340EA