Analog DevicesADA4620-2ARZ-R7Amplificatori OP

ADA4620-2/ADA4620-1: 36 V, Precision, Low Noise, 16.5 MHz JFET Op Amps with Rail-to-Rail Output

The ADA4620-1 and ADA4620-2 are 36 V, precision, low noise, low offset drift, JFET op amps. The parts offer the combination of top precision parameters at speed, and at extended operating range and temperature.

The ADA4620 is ideal for high DC precision and AC performance. The specifications make the ADA4620 optimal as a front-end amplifier in a data-acquisition (DAQ) system, or for a TIA circuit with high input impedance.

For only 1.3 mA of supply current per amplifier, the ADA4620 has a gain-bandwidth product of 16.5 MHz, a 32 V/μs slew rate, 5.1 nV/√Hz of broadband noise, and 225 nV p-p of 0.1 Hz to 10 Hz noise. The input voltage range includes the negative supply, and the output swings rail-to-rail.

The ADA4620 is specified for operating over the temperature range of −40°C to +125°C, and dual supplies ranging from ±2.25 V to ±18 V, or on a single supply ranging from +4.5 V to +36 V. The ADA4620- 1 and ADA4620-2 are available in an 8-lead SOIC_N package.

Key Features and Benefits

• •  Low offset voltage: ±30 μV typ
• •  Low offset voltage drift: ±0.32 μV/°C typ
• •  Low input bias current: ±0.8 pA typ, ±5 pA max
• •  Low 1/f noise: 225 nV p-p, 0.1 Hz to 10 Hz typ
• •  Voltage noise density: 5.1 nV/√Hz at 1 kHz typ
• •  Gain bandwidth product: 16 MHz typ
• •  High slew rate: 32V/μs typ
• •  Low THD + N: −148 dB at 1 kHz typ
• •  Low supply current: 1.3 mA per amplifier typ
• •  Wide power supply range
• •  Single supply: 4.5 V to 36 V
• •  Dual supplies: ±2.25 V to ±18 V
• •  No phase reversal
• •  Unity-gain stable
• •  Extended high input common-mode range
• •  (V+) − 4.4 V < VCM ≤ (V+)
• •  Multiple channel options:
• •  ADA4620-1 single channel
• •  ADA4620-2 dual channel

Applications

• •  Transimpedance amplifiers
• •  Electronic test and measurement
• •  Scientific and field instruments
• •  Semiconductor test
• •  Data acquisition systems
• •  High impedance sensors

Evaluation Board

The ADA4620-2 and ADA4620-1 can be evaluated with the EVAL-ADA4620-1.

Block Diagrams and Tables