Product Overview

SC1641 is a low-power, low-noise 24 bit ∑ - Δ ADC suitable for high-precision measurement applications. It contains 3 differential analog inputs and integrates an on-chip low-noise instrument amplifier, allowing for direct input of small signals. SC1641 can operate with an internal clock or an external clock, and the output data rate can be set through software programming, which can vary within the range of 4.17Hz to 940Hz.

SC1641 is powered by a 2.7V to 5.25V power supply, with a typical power consumption of 360 µ A, and is packaged in a 16 pin TSSOP.

Main performance

◼ Working voltage range: 2.7V-5.25V

◼ Maximum effective resolution of 23 bits

◼ Root Mean Square (RMS) noise

38nV (at 4.17Hz)

79nV (at 16.7Hz)

◼ power waste:

Working mode: 360 µ A

◼ Supports 15 update rates: 4.17Hz-940Hz

◼ 3-channel differential signal input

◼ Built in low-noise amplifier

◼ Gain range 0.5/1/2/4/8/16/32/64/128x optional

◼ Built in RCO circuit, default frequency 64K

◼ Built in programmable current source

◼ Built in bias voltage generator

◼ TSSOP-16 package

◼ SPI communication interface

Supports standard 3-wire SPI interface

Supports up to 5M SCLK communication clock

Supports CRC and XOR verification

Application scenarios

◼ Thermocouple measurement

◼ Thermistor measurement

◼ RTD measurement

◼ instrumentation and meters

Functional module schematic diagram

Order Information

Overall dimensions