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Series Information for AD549LHZ - Analog Devices


  • feature
    Ultralow input bias current 60 fA maximum (AD549L) 100 fA maximum (AD549K) 250 fA maximum (AD549J) Input bias current guaranteed over the common-mode voltage range Low offset voltage 0.50 mV maximum (AD549K) 1.00 mV maximum (AD549J) Low offset drift 15 u03bcV/u00b0C maximum (AD549K) 20 u03bcV/u00b0C maximum (AD549J) Low power 700 u03bcA maximum supply current Low input voltage noise 4 u03bcV (typ) p-p over 0.1 Hz to 10 Hz MIL-STD-883B parts available



The AD549 is a monolithic electrometer operational amplifier with very low input bias current. Input offset voltage and input offset voltage drift are laser trimmed for precision performance. The ultralow input current of the part is achieved with Topgate™ JFET technology, a process development exclusive to Analog Devices, Inc. This technology allows fabrication of extremely low input current JFETs compatible with a standard junction isolated bipolar process. The 1015 Ω common-mode impedance, which results from the bootstrapped input stage, ensures that the input current is essentially independent of the common- mode voltage. The AD549 is suited for applications requiring very low input current and low input offset voltage. It excels as a preamp for a wide variety of current output transducers, such as photodiodes, photomultiplier tubes, or oxygen sensors. The AD549 can also be used as a precision integrator or low droop sample-and-hold. The AD549 is pin compatible with standard FET and electrometer op amps, allowing designers to upgrade the performance of present systems at little additional cost. The AD549 is available in a TO-99 hermetic package. The case is connected to Pin 8, thus, the metal case can be independently connected to a point at the same potential as the input terminals, minimizing stray leakage to the case. The AD549 is available in four performance grades. The J, K, and L versions are rated over the commercial temperature range of 0°C to +70°C. The S grade is specified over the military temperature range of −55°C to +125°C and is available processed to MIL-STD-883B, Rev. C. Extended reliability plus screening is also available. Plus screening includes 168 hour burn-in, as well as other environmental and physical tests derived from MIL-STD-883B, Rev. C.


No. of Amplifiers:
1 Amplifier, 1Amplifiers
Slew Rate:
Supply Voltage Range:
± 5V to ± 18V
Amplifier Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
AD549 Series
Automotive Qualification Standard:
RoHS Phthalates Compliant:
No SVHC (07-Jul-2017)
Amplifer Supply Voltage:
± 5V to ± 18V
Op Amp Type:
Low Input Bias

Alternate Descriptions

RS Components
OP Amp Single GP 18V
RS Components UK
OP Amp Single GP 18V
RS Components DE
Operationsverstärker AD549LHZ 1MHz TO-99, 8-Pin No Montage-Typ : Durchsteckmontage Stromversorgungs-Typ : Dual Versorgungsspannung bipolar typ. : ±15V Flankensteilheit typ. : 3V/µs Betriebstemperatur max. : +70 °C Abmessungen : 9.4 x 9.4 x 4.7mm Länge : 9.4mm Eingansspannungsrauschen typ. : 90nV/√Hz, Analog Devices
RS Components HK
OP Amp Single GP 18V
RS Components JP
OP Amp Single GP 18V
RS Components FR
OP Amp Single GP 18V
RS Components CN
OP Amp Single GP 18V
RS Components ES
OP Amp Single GP 18V
RS Components NL
OP Amp Single GP 18V
RS Components NO
OP Amp Single GP 18V
RS Components US
OP Amp Single GP 18V
RS Components SG
OP Amp Single GP 18V
RS Components TW
OP Amp Single GP 18V

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