AD546 Hoja de datos PDF

AD546 Hoja de datos en formato PDF ( Datasheet )

AD546 Función - 1 pA Monolithic Electrometer Operational Amplifier - Analog Devices

Número de pieza AD546
Descripción 1 pA Monolithic Electrometer Operational Amplifier
Fabricantes Analog Devices 
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AD546 Hoja de datos, Descripción, Manual
1 mV max Input Offset Voltage
Low Offset Drift: 20 V/؇C
1 pA max Input Bias Current
Input Bias Current Guaranteed Over Full
Common-Mode Voltage Range
3 V/s Slew Rate
1 MHz Unity Gain Bandwidth
Low Input Voltage Noise: 4 V p-p, 0.1 Hz to 10 Hz
Available in a Low Cost, 8-Pin Plastic Mini-DIP
Standard Op Amp Pinout
Electrometer Amplifiers
Photodiode Preamps
pH Electrode Buffers
Log Ratio Amplifiers
1 pA Monolithic Electrometer
Operational Amplifier
8-Pin Plastic
Mini-DIP Package
The AD546 is a monolithic electrometer combining the virtues
of low (1 pA) input bias current with the cost effectiveness of a
plastic mini-DIP package. Both input offset voltage and input
offset voltage drift are laser trimmed, providing very high perfor-
mance for such a low cost amplifier.
Input bias currents are reduced significantly by using “topgate”
JFET technology. The 1015 common-mode impedance,
resulting from a bootstrapped input stage, insures that input
bias current is essentially independent of common-mode voltage
The AD546 is suitable for applications requiring both minimal
levels of input bias current and low input offset voltage. Appli-
cations for the AD546 include use as a buffer amplifier for cur-
rent output transducers such as photodiodes and pH probes. It
may also be used as a precision integrator or as a low droop rate
sample and hold amplifier. The AD546 is pin compatible with
standard op amps; its plastic mini-DIP package is ideal for use
with automatic insertion equipment.
The AD546 is available in two performance grades, all rated
over the 0°C to +70°C commercial temperature range, and
packaged in an 8-pin plastic mini-DIP.
1. The input bias current of the AD546 is specified, 100%
tested and guaranteed with the device in the fully warmed-up
2. The input offset voltage of the AD546 is laser trimmed to
less than 1 mV (AD546K).
3. The AD546 is packaged in a standard, low cost, 8-pin
4. A low quiescent supply current of 700 µA minimizes any
thermal effects which might degrade input bias current and
input offset voltage specifications.
*Covered by Patent No. 4,639,683.
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

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