AD8502 Datasheet, PDF (1/6 Pages) Analog Devices – 1μ Micropower Precision CMOS Operational Amplifier

Preliminary Technical Data
FEATURES
Supply current: 1 μA maximum/amplifier
Offset voltage: 3 mV maximum
Single-supply or dual-supply operation
Rail-to-rail input and output
No phase reversal
Unity gain stable
APPLICATIONS
Portable equipment
Remote sensors
Low power filters
Threshold detectors
Current sensing
GENERAL DESCRIPTION
The AD850x family are low power, precision CMOS op amps
featuring a maximum supply current of 1 μA. The AD850x family
has a maximum offset voltage of 3 mV and a typical input bias
current of 1 pA, and it operates rail-to-rail on both the input
and output. The AD850x family can operate from a single-
supply voltage of +1.8 V to +5.5 V or a dual-supply voltage of
±0.9 V to ±2.75 V.
With its low power consumption, low input bias current, and
rail-to-rail input and output, the AD850x family is ideally suited
for a variety of battery-powered portable applications. Potential
applications include bedside monitors, pulse monitors, glucose
meters, smoke and fire detectors, vibration monitors, and
backup battery sensors.
1μ Micropower Precision CMOS
Operational Amplifier
AD8502/AD8504
PIN CONFIGURATIONS
OUT A 1
8 V+
–IN A 2 AD8502 7 OUT B
TOP VIEW
+IN A 3 _{(Not to Scale)} 6 –IN B
V– 4
5 +IN B
Figure 1. 8-Lead SOT23
OUT A ¹
IN A ²
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
AD8504
TOP VIEW
(Not to Scale)
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
Figure 2. 14-Lead TSSOP (RU-14)
The ability to swing rail-to-rail at both the input and output
helps maximize dynamic range and signal-to-noise ratio in
systems that operate at very low voltages. The low offset voltage
allows the AD850x family to be used in systems with high gain
without having excessively large output offset errors, and it
provides high accuracy without the need for system calibration.
The AD850x family is fully specified over the industrial
temperature range (−40°C to +85°C) and is operational over the
extended industrial temperature range (−40°C to +125°C). The
AD8502 is available in a 8-lead, SOT23 surface-mount package.
The AD8504 is available in 14-lead TSSOP surface-mount
package.
Rev. PrB
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