22 μA, RRIO, CMOS, 18 V
Operational Amplifier
AD8546/AD8548
Data Sheet
FEATURES
PIN CONFIGURATIONS
Micropower at high voltage: 22 μA maximum
Low input bias current: 20 pA maximum
Gain bandwidth product: 240 kHz
Slew rate: 80 V/ms
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8546
OUT B
–IN B
+IN B
TOP VIEW
(Not to Scale)
Large signal voltage gain: 110 dB minimum
Single-supply operation: 2.7 V to 18 V
Dual-supply operation: 1.35 V to 9 V
Unity-gain stable
Figure 1. AD8546 (8-Lead MSOP)
OUT A
–IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
AD8548
TOP VIEW
APPLICATIONS
(Not to Scale)
+IN B
–IN B
OUT B
10 +IN C
Portable medical equipment
Remote sensors
9
8
–IN C
OUT C
Transimpedance amplifiers
Current monitors
Figure 2. AD8548 (14-Lead SOIC_N)
4 mA to 20 mA loop drivers
Buffer/level shifting
Table 1. Micropower Op Amps1
GENERAL DESCRIPTION
The AD8546 and AD8548 are dual and quad micropower, high
input impedance amplifiers optimized for low power and wide
operating supply voltage range applications.
Supply Voltage
12 V to 18 V
AD8663
Amplifier
5 V
36 V
Single
AD8500
AD8505
AD8541
AD8603
ADA4505-1
AD8502
AD8506
AD8542
AD8607
ADA4505-2
AD8504
AD8508
AD8544
AD8609
ADA4505-4
The AD8546/AD8548 rail-to-rail input/output (RRIO) feature
provides increased dynamic range to drive low frequency data
converters, making these amplifiers ideal for dc gain and buffering
of sensor front ends or high impedance input sources used in
wireless or remote sensors or transmitters.
Dual
AD8546
AD8657
AD8667
OP281
OP295
ADA4062-2
The low supply current specification (22 μA) of the AD8546/
AD8548 over a wide operating voltage range of 2.7 V to 18 V
or dual supplies (±1.ꢀ5 V to ±± V) makes these amplifiers useful
for a variety of battery-powered, portable applications, such as
ECGs, pulse monitors, glucose meters, smoke and fire detectors,
vibration monitors, and backup battery sensors.
Quad
AD8548
AD8669
OP481
OP495
ADA4062-4
The AD8546/AD8548 are specified over the extended industrial
temperature range of −40°C to +125°C. The AD8546 is available
in an 8-lead MSOP package; the AD8548 is available in a 14-lead
SOIC_N package.
1 See www.analog.com for the latest selection of micropower op amps.
Rev. B
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