AD7631

PRODUCTION

18-Bit, 250 kSPS, Differential Programmable Input PulSAR® ADC

Analog Devices AD7631 Product Info

10 February 2026 6

Features

Multiple pins/software-programmable input ranges
+5 V (10 V p-p), +10 V (20 V p-p), ±5 V (20 V p-p), ±10 V (40 V p-p)
Pins or serial SPI-compatible input ranges/mode selection

Power dissipation
73 mW @ 250 kSPS
10 mW @ 1 kSPS
See datasheet for additional features

Part details & applications

The AD7631 is an 18-bit, charge redistribution, successive approximation register (SAR), architecture analog-to-digital converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS high voltage process. The device is configured through hardware or via a dedicated write-only serial configuration port for input range and operating mode. The AD7631 contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. A falling edge on CNVST samples the fully differential analog inputs on IN+ and IN−. The AD7631 features four different analog input ranges. Power is scaled linearly with throughput. Operation is specified from −40°C to +85°C.

APPLICATIONS

Process controls
High speed data acquisition
Digital signal processing
Spectrum analysis
ATE

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