BURR-BROWN OPA241 User Manual

®

OPA241

OPA4251

OPA241

OPA2241
OPA4241

OPA4241

Single-Supply,

OPERATIONAL AMPLIFIERS

OPA241 Family optimized for +5V supply.
OPA251 Family optimized for ±15V supply.

FEA TURES

●

Micro

POWER: IQ = 25µA

● SINGLE-SUPPLY OPERATION

● RAIL-TO-RAIL OUTPUT (within 50mV)

● WIDE SUPPLY RANGE

Single Supply: +2.7V to +36V
Dual Supply: ±1.35V to ±18V

● LOW OFFSET VOLTAGE: ±250µV max

● HIGH COMMON-MODE REJECTION: 124dB

● HIGH OPEN-LOOP GAIN: 128dB

● SINGLE, DUAL, AND QUAD

APPLICATIONS

● BATTERY OPERATED INSTRUMENTS

● PORTABLE DEVICES

● MEDICAL INSTRUMENTS

● TEST EQUIPMENT

OPA2251

OPA251

OPA2251
OPA4251

Micro

POWER

DESCRIPTION

The OPA241 series and OPA251 series are specifically
designed for battery powered, portable applications. In addi­tion to very low power consumption (25µA), these amplifi­ers feature low offset voltage, rail-to-rail output swing, high
common-mode rejection, and high open-loop gain.

The OPA241 series is optimized for operation at low power
supply voltage while the OPA251 series is optimized for
high power supplies. Both can operate from either single
(+2.7V to +36V) or dual supplies (±1.35V to ±18V). The
input common-mode voltage range extends 200mV below
the negative supply—ideal for single-supply applications.

They are unity-gain stable and can drive large capacitive
loads. Special design considerations assure that these prod­ucts are easy to use. High performance is maintained as the
amplifiers swing to their specified limits. Because the initial
offset voltage (±250µV max) is so low, user adjustment is
usually not required. However, external trim pins are pro­vided for special applications (single versions only).

The OPA241 and OPA251 (single versions) are available
in standard 8-pin DIP and SO-8 surface-mount packages.
The OPA2241 and OPA2251 (dual versions) come in 8-pin
DIP and SO-8 surface-mount packages. The OPA4241 and
OPA4251 (quad versions) are available in 14-pin DIP and
SO-14 surface-mount packages. All are fully specified
from –40°C to +85°C and operate from –55°C to +125°C.

SBOS075

OPA241, OPA251

Offset Trim

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

© 1997 Burr-Brown Corporation PDS-1406B Printed in U.S.A. October, 1998

–In
+In

1
2
3

V–

4

8-Pin DIP, SO-8

8
7
6
5

NC
V+
Output
Offset Trim

Out A

–In A
+In A

OPA2241, OPA2251

1
2
3

V–

4

A

B

8-Pin DIP, SO-8

1

V+

8

Out B

7

–In B

6

+In B

5

Out A

–In A
+In A

V+
+In B
–In B

Out B

OPA4241, OPA4251

1
2

AD

3
4
5

BC

6
7

14-Pin DIP, SO-14

OPA241, 2241, 4241
OPA251, 2251, 4251

Out D

14

–In D

13

+In D

12

V–

11

+In C

10

–In C

9

Out C

8

®

SPECIFICATIONS: VS = 2.7V to 5V

At TA = +25°C, RL = 100kΩ connected to VS/2, unless otherwise noted.

Boldface limits apply over the specified temperature range, T

PARAMETER CONDITION MIN TYP
OFFSET VOLTAGE

Input Offset Voltage V

T

= –40°C to +85°C ±100 ±400 ±130 µV

A

vs Temperature dV
vs Power Supply PSRR V

T

= –40°C to +85°C VS = 2.7V to 36V 30 ✻ µV/V

A

Channel Separation (dual, quad) 0.3 ✻ µV/V

INPUT BIAS CURRENT

Input Bias Current

T

= –40°C to +85°C –25 nA

A

Input Offset Current I

T

= –40°C to +85°C ±2 nA

A

(2)

OS

/dT TA = –40°C to +85°C ±0.4 ±0.6 µV/°C

OS

I

B

OS

NOISE

Input Voltage Noise, f = 0.1Hz to 10Hz 1 ✻ µVp-p
Input Voltage Noise Density, f = 1kHz e
Current Noise Density, f = 1kHz i

n
n

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V
Common-Mode Rejection Ratio CMRR V

T

= –40°C to +85°C V

A

CM

INPUT IMPEDANCE

Differential 10
Common-Mode 10

OPEN-LOOP GAIN

Open-Loop Voltage Gain A

T

= –40°C to +85°C

A

T

= –40°C to +85°C

A

= 100kΩ, VO = (V–)+100mV to (V+)–100mV

OLRL

RL = 100kΩ, VO = (V–)+100mV to (V+)–100mV

RL = 10kΩ, VO = (V–)+200mV to (V+)–200mV
RL = 10kΩ, VO = (V–)+200mV to (V+)–200mV

FREQUENCY RESPONSE

Gain-Bandwidth Product GBW 35 ✻ kHz
Slew Rate SR V
Overload Recovery Time V

OUTPUT

Voltage Output Swing from Rail

T

= –40°C to +85°C RL = 100kΩ to VS/2, A

A

T

= –40°C to +85°C RL = 10kΩ to VS/2, A

A

Short-Circuit Current I

Single Versions –24/+4 ✻ mA

(3)

V

RL = 100kΩ to VS/2, A

O

R

L

R

SC

Dual, Quad Versions –30/+4 ✻ mA

Capacitive Load Drive C

LOAD

POWER SUPPLY

Specified Voltage Range V
Operating Voltage Range T
Quiescent Current (per amplifier) I

T

= –40°C to +85°C IO = 0 ±36 µA

A

S

Q

TEMPERATURE RANGE

Specified Range –40 +85 ✻✻°C
Operating Range –55 +125 ✻✻°C
Storage Range –55 +125 ✻✻°C
Thermal Resistance

8-Pin DIP 100 ✻ °C/W

θ

JA

SO-8 Surface Mount 150 ✻ °C/W
14-Pin DIP 80 ✻ °C/W
SO-14 Surface Mount 100 ✻ °C/W

✻ Specifications the same as OPA241UA, PA.
NOTES: (1) V

output and power supply rails.

= +5V. (2) The negative sign indicates input bias current flows out of the input terminals. (3) Output voltage swings are measured between the

S

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.

= –40°C to +85°C.

A

OPA241UA, PA OPA251UA, PA
OPA2241UA, PA OPA2251UA, PA
OPA4241UA, PA OPA4251UA, PA

(1)

MAX MIN TYP

(1)

±50 ±250 ±100 µV

= 2.7V to 36V 3 30 ✻✻µV/V

S

–4 –20 ✻ nA

±0.1 ±2 ✻ nA

45 ✻ nV/√Hz
40 ✻ fA/√Hz

= –0.2V to (V+) –0.8V 80 106 ✻ dB

–0.2

CM

= 0V to (V+) –0.8V 80 dB

CM

(V+) –0.8

7

|| 2 ✻ Ω || pF

9

|| 4 ✻ Ω || pF

100 120 ✻ dB
100 dB
100 120 ✻ dB
100 dB

= 5V, G = 1 0.01 ✻ V/µs

S

• G = V

IN

= 100kΩ to VS/2, A

= 10kΩ to VS/2, A

L

S

≥ 70dB 50 ✻ mV

OL

≥ 100dB 75 100 ✻ mV

OL

≥ 100dB 100 mV

OL

≥ 100dB 100 200 ✻ mV

OL

≥ 100dB 200 mV

OL

60 ✻ µs

See Typical Curve ✻

= –40°C to +85°C +2.7 +36 ✻✻V

+2.7 to +5

A

IO = 0 ±25 ±30 ✻ µA

✻ V

MAX UNITS

V

®

OPA241, 2241, 4241
OPA251, 2251, 4251

2

SPECIFICATIONS: VS = ±15V

At TA = +25°C, RL = 100kΩ connected to ground, unless otherwise noted.

Boldface limits apply over the specified temperature range, T

PARAMETER CONDITION MIN TYP MAX MIN TYP MAX UNITS
OFFSET VOLTAGE

Input Offset Voltage V

T

= –40°C to +85°C ±150 ±100 ±300 µV

A

vs Temperature dV
vs Power Supply PSRR V

T

= –40°C to +85°C VS = ±1.35V to ±18V ✻ 30 µV/V

A

Channel Separation (dual, quad) ✻ 0.3 µV/V

INPUT BIAS CURRENT

Input Bias Current

T

= –40°C to +85°C –25 nA

A

Input Offset Current I

T

= –40°C to +85°C ±2 nA

A

(1)

OS

/dT TA = –40°C to +85°C ±0.6 ±0.5 µV/°C

OS

I

B

OS

NOISE

Input Voltage Noise, f = 0.1Hz to 10Hz ✻ 1 µVp-p
Input Voltage Noise Density, f = 1kHz e
Current Noise Density, f = 1kHz i

n
n

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V
Common-Mode Rejection Ratio CMRR V

T

= –40°C to +85°C V

A

CM

INPUT IMPEDANCE

Differential ✻ 10
Common-Mode ✻ 10

OPEN-LOOP GAIN

Open-Loop Voltage Gain A

T

= –40°C to +85°C

A

T

= –40°C to +85°C

A

= 100kΩ, VO = –14.75V to +14.75V

OLRL

RL = 100kΩ, VO = –14.75V to +14.75V

RL = 20kΩ, VO = –14.7V to +14.7V
RL = 20kΩ, VO = –14.7V to +14.7V

FREQUENCY RESPONSE

Gain-Bandwidth Product GBW ✻ 35 kHz
Slew Rate SR G = 1 ✻ 0.01 V/µs
Overload Recovery Time V

OUTPUT

Voltage Output Swing from Rail

T

= –40°C to +85°C RL = 100kΩ, A

A

T

= –40°C to +85°C RL = 20kΩ, A

A

Short-Circuit Current I

Single Versions ✻ –21/+4 mA

(2)

V

O

SC

Dual Versions ✻ –50/+4 mA

Capacitive Load Drive C

LOAD

POWER SUPPLY

Specified Voltage Range V
Operating Voltage Range T
Quiescent Current (per amplifier) I

T

= –40°C to +85°C IO = 0 ±45 µA

A

S

Q

TEMPERATURE RANGE

Specified Range ✻✻–40 +85 °C
Operating Range ✻✻–55 +125 °C
Storage Range ✻✻–55 +125 °C
Thermal Resistance

8-Pin DIP ✻ 100 °C/W

θ

JA

SO-8 Surface Mount ✻ 150 °C/W
14-Pin DIP ✻ 80 °C/W
SO-14 Surface Mount ✻ 100 °C/W

✻ Specifications the same as OPA251UA, PA.
NOTES: (1) The negative sign indicates input bias current flows out of the input terminals. (2) Output voltage swings are measured between the output and

power supply rails.

= –40°C to +85°C.

A

OPA241UA, PA OPA251UA, PA
OPA2241UA, PA OPA2251UA, PA
OPA4241UA, PA OPA4251UA, PA

±100 ±50 ±250 µV

= ±1.35V to ±18V ✻✻ 330µV/V

S

✻ –4 –20 nA

✻ ±0.1 ±2nA

✻ 45 nV/√Hz
✻ 40 fA/√Hz

(V–) –0.2 (V+) –0.8

= –15.2V to 14.2V ✻ 100 124 dB

CM

= –15V to 14.2V 100 dB

CM

7

|| 2 Ω || pF

9

|| 4 Ω || pF

✻ 100 128 dB

100 dB

✻ 100 128 dB

100 dB

• G = V

IN

RL = 100kΩ, A

R

= 100kΩ, A

L

R

= 20kΩ, A

L

S

≥ 70dB ✻ 50 mV

OL

≥ 100dB ✻ 75 250 mV

OL

≥ 100dB 250 mV

OL

≥ 100dB ✻ 100 300 mV

OL

≥ 100dB 300 mV

OL

✻ 60 µs

✻ See Typical Curve

✻ ±15 V

= –40°C to +85°C ✻✻±1.35 ±18 V

A

IO = 0 ✻ ±27 ±38 µA

V

3

OPA251, 2251, 4251

OPA241, 2241, 4241

®

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V+ to V– .................................................................... 36V

Input Voltage
Output Short Circuit

Operating Temperature .................................................. –55°C to +125°C

Storage Temperature .....................................................–55°C to +125°C

Junction Temperature...................................................................... 150°C

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

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 that 0.5V beyond the supply rails should be current­limited to 5mA or less. (3) One amplifier per package.

(2)

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

to Ground

(3)

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

(1)

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 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 its
published specifications.

PACKAGE/ORDERING INFORMATION

PRODUCT VOLTAGE RANGE PACKAGE NUMBER

SPECIFIED VOLTAGE DRAWING TEMPERATURE

OPA241 SERIES
Single

OPA241PA 2.7V to 5V 2.7V to 36V 8-Pin DIP 006 –40°C to +85°C
OPA241UA 2.7V to 5V 2.7V to 36V SO-8 Surface Mount 182 –40°C to +85°C

Dual

OPA2241PA 2.7V to 5V 2.7V to 36V 8-Pin DIP 006 –40°C to +85°C
OPA2241UA 2.7V to 5V 2.7V to 36V SO-8 Surface Mount 182 –40°C to +85°C

Quad

OPA4241PA 2.7V to 5V 2.7V to 36V 14-Pin DIP 010 –40°C to +85°C
OPA4241UA 2.7V to 5V 2.7V to 36V SO-14 Surface Mount 235 –40°C to +85°C

OPA251 SERIES
Single

OPA251PA ±15V 2.7V to 36V 8-Pin DIP 006 –40°C to +85°C
OPA251UA ±15V 2.7V to 36V SO-8 Surface Mount 182 –40°C to +85°C

Dual

OPA2251PA ±15V 2.7V to 36V 8-Pin DIP 006 –40°C to +85°C
OPA2251UA ±15V 2.7V to 36V SO-8 Surface Mount 182 –40°C to +85°C

Quad

OPA4251PA ±15V 2.7V to 36V 14-Pin DIP 010 –40°C to +85°C
OPA4251UA ±15V 2.7V to 36V SO-14 Surface Mount 235 –40°C to +85°C

NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book.

OPERATING PACKAGE SPECIFICATION

(1)

RANGE

®

OPA241, 2241, 4241
OPA251, 2251, 4251

4

TYPICAL PERFORMANCE CURVES

At TA = +25°C, and RL = 100kΩ connected to VS/2 (ground for VS = ±15V), unless otherwise noted.

Curves apply to OPA241 and OPA251 unless specified.

160
140
120
100

80
60
40

Voltage Gain (dB)

20

0

–20

OPEN-LOOP GAIN/PHASE vs FREQUENCY

G

VS = ±15V
V

= +5V

S

0.01 0.1

1 10 100 1k 10k 100k

Frequency (Hz)

180
160
140
120
100

Φ

80

Phase (°)

60
40
20
0

140

120

100

80

60

40

20

Power Supply Rejection Ratio (dB)

0

POWER SUPPLY and COMMON-MODE

REJECTION RATIO vs FREQUENCY

VS = ±15V

VS = ±5V

CMRR

+PSRR

–PSRR

0.1 1 10 100 1k 10k 100k
Frequency (Hz)

140

130

120

110

100

90

Channel Separation (dB)

80

70

30

28

26

24

Quiescent Current (µA)

CHANNEL SEPARATION vs FREQUENCY

Dual and quad devices.
G = 1, all channels.
Quad measured channel
A to D or B to C—other
combinations yield improved
rejection.

10010 1k 10k 100k

QUIESCENT CURRENT vs SUPPLY VOLTAGE

Per Amplifier

Frequency (Hz)

INPUT VOLTAGE AND CURRENT

NOISE SPECTRAL DENSITY vs FREQUENCY

Current Noise

Voltage Noise

0.1 1 10 100 1k 10k
Frequency (Hz)

QUIESCENT CURRENT vs TEMPERATURE

Per Amplifier

VS = ±15V

VS = +5V

Voltage Noise (nV/÷Hz)

Quiescent Current (µA)

1k

100

10

40

35

30

25

20

1k

100

Current Noise (fA/√Hz)

10

22

0 5 10 15 20 25 30 35 40

Total Supply Voltage (V)

15

–75 –50 –25 0 25 50 75 100 125

Temperature (°C)

5

OPA251, 2251, 4251

OPA241, 2241, 4241

®