REV. A

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a

OP215

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Dual Precision JFET-Input

Operational Amplifier

FEATURES

High Slew Rate: 10 V/ s Min

Fast Settling Time: 0.9

s to 0.1% Type

Low Input Offset Voltage Drift: 10

V/ C Max

Wide Bandwidth: 3.5 MHz Min

Temperature-Compensated Input Bias Currents

Guaranteed Input Bias Current: 18 nA Max (125 C)

Bias Current Specified Warmed Up over Temperature

Low Input Noise Current: 0.01 pA/

High Common-Mode Rejection Ratio 86 dB Min

Pin Compatible with Standard Dual Pinouts

Models with MIL-STD-883 Class B Processing Available

GENERAL DESCRIPTION

The OP215 offers the proven JFET-input performance advantages

of high speed and low input bias current with the tracking and

convenience advantages of a dual op amp configuration.

Low input offset voltages, low input currents, and low drift are

featured in these high-speed amplifiers.

bias-current compensation scheme gives a low input bias current

V+

NOMINV

INPUT+

V–

J3

J1

Q5

R1

J2

C1

7.4

pF

J4

Q12

–INV

INPUT

Q8

R3

Q6

J5

J11

Q7

NULL

R8

J8 J7

R7

NULL

Q1

Q3

R9

Q11

R4

R5

3.6

k

Q16

Q13

Q15

R6

3.6k

Q14

Q4

Q2

R2

C2

7.4pF

Q10

Q9

J6

Q19

Q17

Q18

Q21

J9

Q20

J10

Q23

R13

Q24

Q22

OUTPUT

R10

Q25

R11

R12

NOTE

R7, R8 ARE ELECTRONICALLY ADJUSTED

ON-CHIP FOR MINIMUM OFFSET VOLTAGE

Figure 1. Simplified Schematic (1/2 OP215)

at elevated temperature. Thus, the OP215 features an input bias

current of 1.4 nA at 70

∞C ambient (not junction) temperature

which greatly extends the application usefulness of this device.

Applications include high-speed amplifiers for current output

DACs, active filters, sample-and-hold buffers, and photocell

amplifiers. For additional precision JFET op amps, see the

OP249 and AD712 data sheets.