AD820ARZ-REEL7 Audio Power Amplifier IC Precision Amplifiers SGL-Supply RR Lo Pwr FET-Inpt
digital audio amplifier ic
,audio preamplifier ic
AD820ARZ-REEL7 Audio Power Amplifier IC Precision Amplifiers SGL-Supply RR Lo Pwr FET-Inpt
FEATURES
- True single-supply operation
- Output swings rail-to-rail
- Input voltage range extends below ground Single-supply capability from 5 V to 30 V Dual-supply capability from ±2.5 V to ±15 V
- Excellent load drive
- Capacitive load drive up to 350 pF Minimum output current of 15 mA
- Excellent ac performance for low power 800 μA maximum quiescent current Unity-gain bandwidth: 1.8 MHz
- Slew rate of 3 V/μs
- Excellent dc performance
- 800 μV maximum input offset voltage 2 μV/°C typical offset voltage drift
- 25 pA maximum input bias current
- Low noise: 13 nV/√Hz @ 10 kHz
APPLICATIONS
- Battery-powered precision instrumentation Photodiode preamps
- Active filters
- 12-bit to 14-bit data acquisition systems Medical instrumentation
- Low power references and regulators
GENERAL DESCRIPTION
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).
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