Datasheet AD8502, AD8504 (Analog Devices)

1 μA Micropower CMOS Operational Amplifiers AD8502/AD8504 FEATURES PIN CONFIGURATIONS Supply current: 1 μA maximum/amplifier OUT A 1 8 V+ Offset voltage: 3 mV maximum –IN A 2 AD8502 7 OUT B Single-supply or dual-supply operation TOP VIEW +IN A 3 6 –IN B Rail-to-rail input and output (Not to Scale)
01 0
No phase reversal V– 4 5 +IN B
3- 32 06
Unity gain stable
Figure 1. 8-Lead SOT-23
APPLICATIONS OUT A 1 14 OUT D 2 Portable equipment –IN A 13 –IN D +IN A AD8504 Remote sensors 3 12 +IN D TOP VIEW Low power filters V+ 4 11 V– (Not to Scale) Threshold detectors +IN B 5 10 +IN C –IN B 6 9 Current sensing –IN C
38
OUT B 7 8 OUT C
0 3- 32 06 Figure 2. 14-Lead TSSOP (RU-14)
GENERAL DESCRIPTION
The AD8502/AD8504 are low power, precision CMOS operational without creating excessively large output offset errors. The amplifiers featuring a maximum supply current of 1 μA per AD8502 and AD8504 offer an additional benefit by providing amplifier. The AD8502/AD8504 have a maximum offset voltage high accuracy without the need for system calibration. of 3 mV and a typical input bias current of 1 pA operating rail- The AD8502/AD8504 are fully specified over the industrial to-rail on both the input and output. The AD8502/AD8504 can temperature range (−40°C to +85°C) and the extended indus- operate from a single-supply voltage of +1.8 V to +5.5 V or a trial temperature range (−40°C to +125°C). The AD8502 is dual-supply voltage of ±0.9 V to ±2.75 V. available in an 8-lead, SOT-23 surface-mount package. The With its low power consumption, low input bias current, and AD8504 is available in a 14-lead TSSOP surface-mount package. rail-to-rail input and output, the AD8502/AD8504 are ideally suited for a variety of battery-powered portable applications.
Table 1. Low Supply Current Op Amps
Potential applications include bedside monitors, pulse monitors,
Supply Current 1 μA 10 μA 20 μA
glucose meters, smoke and fire detectors, vibration monitors, Single AD8500 and backup battery sensors. Dual AD8502 ADA4505-2 AD8506 Quad AD8504 ADA4505-4 AD8508 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 use of the AD8502/AD8504 in systems with high gain
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Document Outline Features Applications Pin Configurations General Description Revision History Specifications Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Typical Performance Characteristics Outline Dimensions Ordering Guide