AD8657 Datasheet, PDF (1/24 Pages) Analog Devices – 18 V, Precision, Micropower CMOS RRIO Operational Amplifier

18 V, Precision, Micropower
CMOS RRIO Operational Amplifier
AD8657
FEATURES
Micropower at high voltage (18 V): 18 μA typical
Low offset voltage: 350 µV maximum
Single-supply operation: 2.7 V to 18 V
Dual-supply operation: ±1.35 V to ±9 V
Low input bias current: 20 pA
Gain bandwidth: 200 kHz
Unity-gain stable
Excellent electromagnetic interference immunity
APPLICATIONS
Portable operating systems
Current monitors
4 mA to 20 mA loop drivers
Buffer/level shifting
Multipole filters
Remote/wireless sensors
Low power transimpedance amplifiers
GENERAL DESCRIPTION
The AD8657 is a dual, precision, micropower, rail-to-rail
input/output (RRIO) amplifier optimized for low power and
wide operating supply voltage range applications.
The AD8657 operates from 2.7 V up to 18 V with a typical
quiescent supply current of 18 μA. It uses the Analog Devices,
Inc., patented DigiTrim® trimming technique, which achieves
low offset voltage. The AD8657 also has high immunity to
electromagnetic interference.
The combination of low supply current, low offset voltage, very
low input bias current, wide supply range, and rail-to-rail input
and output makes the AD8657 ideal for current monitoring and
current loops in process and motor control applications. The
combination of precision specifications makes this device ideal
for dc gain and buffering of sensor front ends or high impedance
input sources in wireless or remote sensors or transmitters.
The AD8657 is specified over the extended industrial tempera-
ture range ( −40°C to +125°C) andis available in an 8-lead MSOP
package.
PIN CONFIGURATION
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8657
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. 8-Lead MSOP
Table 1. Micropower Op Amps
Supply Voltage 5 V
Single
AD8500
ADA4505-1
AD8505
AD8541
AD8603
Dual
AD8502
ADA4505-2
AD8506
AD8542
AD8607
Quad
AD8504
ADA4505-4
AD8508
AD8544
AD8609
12 V to 16 V
AD8663
AD8667
OP281
AD8669
OP481
36 V
OP295
ADA4062-2
OP495
ADA4062-4
Rev. 0
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