Model Information

• Part Number: AD623ARZ-R7
• Temperature Range: -40°C to +85°C
• Package: 8-Lead Standard Small Outline Package [SOIC_N]
• Package Option: R-8
• Marking Code: R-8
• RoHS Compliance: Yes (denoted by "Z" in part number)

Key Features

• Easy to Use: Rail-to-rail output swing
• Input Voltage Range: Extends 150 mV below ground (single supply)
• Low Power: 550 µA maximum quiescent current
• Gain Set with One External Resistor: Gain range 1 to 1000
• High Accuracy DC Performance: 0.10% gain error (G = 1), 0.35% gain error (G > 1)
• Noise: 35 nV/√Hz RTI noise at 1 kHz
• Optimal Dynamic Specifications: 800 kHz bandwidth (G = 1), 20 µs settling time to 0.01% (G = 10)

Applications

• Low power medical instrumentation
• Transducer interfaces
• Thermocouple amplifiers
• Industrial process controls
• Difference amplifiers
• Low power data acquisition

General Description

The AD623ARZ-R7 is an integrated, single- or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 2.7 V to 12 V. It offers user flexibility by allowing single gain set resistor programming and conforms to the 8-lead industry standard pinout configuration. With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains of up to 1000.

Pin Configuration and Function Descriptions

• Pin 1: Inverting Terminal of External Gain Setting Resistor, RG.
• Pin 2: Inverting In-Amp Input.
• Pin 3: Noninverting In-Amp Input.
• Pin 4: Negative Supply Terminal.
• Pin 5: In-Amp Output Reference Input.
• Pin 6: In-Amp Output.
• Pin 7: Positive Supply Terminal.
• Pin 8: Noninverting Terminal of External Gain Setting Resistor, RG.

Electrical Specifications (Single Supply)

• Gain Range: 1 to 1000
• Gain Error: 0.03% to 0.35% depending on gain setting
• Nonlinearity: 50 ppm
• Voltage Offset: 25 µV to 500 µV
• Input Bias Current: 17 nA to 25 nA
• Input Impedance: Differential 2||2 GΩ||pF, Common-Mode 2||2 GΩ||pF
• Input Voltage Range: VS = 3 V to 12 V (−VS) − 0.15 V
• Common-Mode Rejection: 70 dB to 110 dB depending on gain setting
• Output Swing: 0.2 (+VS) − 0.5 V
• Small Signal −3 dB Bandwidth: 800 kHz to 2 kHz depending on gain setting
• Slew Rate: 0.3 V/µs
• Settling Time to 0.01%: 30 µs to 20 µs depending on gain setting

Noise Performance

• Voltage Noise: 35 nV/√Hz at 1 kHz
• RTI Noise: 3.0 µV p-p at 0.1 Hz to 10 Hz for G = 1, 1.5 µV p-p for G = 1000

Mechanical Dimensions

• Package Dimensions: 8-Lead Standard Small Outline Package [SOIC_N] compliant with JEDEC standards