AD820ARZ-REEL7 vs OP177GS vs AD820ARZ Comparison

Product Details The AD820 is a precision, low power FET input op amp that can operate from a single supply of 5 V to 36 V, or dual supplies of ±2.5 V to ±18 V. It has true single-supply capability, with an input voltage range extending below the negative rail, allowing the AD820 to accommodate input signals below ground in the single-supply mode. Output voltage swing extends to within 10 mV of each rail, providing the maximum output dynamic range. Offset voltage of 800 μV maximum, offset voltage drift of 2 μV/°C, typical input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to 1 GΩ. 1.8 MHz unity gain bandwidth, −93 dB THD at 10 kHz, and 3 V/μs slew rate are provided for a low supply current of 800 μA. The AD820 drives up to 350 pF of direct capacitive load and provides a minimum output current of 15 mA. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for the single-supply user. The AD820 is available in two performance grades. The A and B grades are rated over the industrial temperature range of −40°C to +85°C. The AD820 is offered in three 8-lead package options: plastic DIP (PDIP), surface mount (SOIC) and (MSOP).

.

*Applications**

.

Battery-powered precision instrumentation

.

Photodiode preamps

.

Active filters

.

12-bit to 14-bit data acquisition systems

.

Medical instrumentation

.

Low power references and regulators

.

True single-supply operation

.

Excellent load drive

.

Excellent ac performance for low power

.

Excellent dc performance

.

Low noise: 13 nV/√Hz @ 10 kHz

Product Details The OP177 features one of the highest precision performance of any operational amplifier currently available. Offset voltage of the OP177 is only 25 μV maximum at room temperature. The ultralow VOS of the OP177 combines with the exceptional offset voltage drift (TCVOS) of 0.3 μV/°C maximum to eliminate the need for external VOS adjustment and increases system accuracy over temperature. The OP177 open-loop gain of 12 V/μV is maintained over the full ±10 V output range. CMRR of 130 dB minimum, PSRR of 120 dB minimum, and maximum supply current of 2 mA are just a few examples of the excellent performance of this operational amplifier. The combination of outstanding specifications of the OP177 ensures accurate performance in high closed-loop gain applications. This low noise, bipolar input operational amplifier is also a cost effective alternative to chopper-stabilized amplifiers. The OP177 provides chopper-type performance without the usual problems of high noise, low frequency chopper spikes, large physical size, limited common-mode input voltage range, and bulky external storage capacitors. The OP177 is offered in the −40°C to +85°C extended industrial temperature ranges. This product is available in 8-lead PDIP, as well as the space saving 8-lead SOIC. ### Features and Benefits

.

Ultralow offset voltage

.

TA = 25°C, 25 μV maximum

.

Outstanding offset voltage drift 0.3 μV/°C maximum

.

Excellent open-loop gain and gain linearity

.

12 V/μV typical

.

CMRR: 130 dB minimum

.

PSRR: 115 dB minimum

.

Low supply current 2.0 mA maximum

.

Fits industry-standard precision operational amplifier sockets

The AD820ARZ is a precision, low power FET input Operational Amplifier that can operate from a single supply of 5 to 36V or dual supplies of ±2.5 to ±18V. It has true single-supply capability, with an input voltage range extending below the negative rail, allowing this to accommodate input signals below ground in the 1-supply mode. Output voltage swing extends to within 10mV of each rail, providing the maximum output dynamic range. This drives up to 350pF of direct capacitive load and provides a minimum output current of 15mA. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for the single-supply user.

.

Input voltage range extends below ground

.

Excellent load drive

.

Excellent AC performance for low power

.

800µA Maximum quiescent current

.

1.8MHz Unity-gain bandwidth

.

Excellent DC performance

.

13nV/√Hz at 10kHz Low noise