مدار مجتمع (آی سی) آی‌سی جمع‌آوری داده مبدل آنالوگ به دیجیتال (ای‌دی‌سی)

HCTMICRO HCT6961-8

Manufacturer	HCTmicro
Mfr. Part Number	HCT6961-8
Electland Part Code	704640
Electland Part Number	NYE_HCT6961-8
Category	Analog to Digital Converters (ADC)
Description	24 Bit Analog to Digital Converter 8 Input Sigma-Delta QFN-32-EP(5x5)

Product Attributes

Category	Integrated Circuits (ICs) Data Acquisition Analog to Digital Converters (ADC)
Operating Temperature	-40℃~+105℃
Voltage - Supply	2.3V~5.5V
interface	SPI
Number of Channels	8
Clock Frequency	2.4576MHz
Clock/Oscillator	Built-in
ADC architecture	Sigma-Delta
Resolution(Bits)	24;6.4kHz;12.8kHz
Quiescent Current (Iq)	1uA
Voltage Reference	Built-in
Programmable Gain	Support
Packaging	QFN-32-EP(5x5)
Weight	0.1535g

Introduction

HCT6961-x is a SPI-interface 16/8-channel, 24-bit high-precision ADC IC, integrating a 1×–128× programmable low-noise instrumentation amplifier, high-precision Sigma-Delta ADC, dual precision current sources, high-performance temperature sensor, 5ppm/℃ high-precision voltage reference, bias voltage output circuit, and precision internal RC clock source. The ADC achieves an effective resolution of 23.3 bits @ 1× PGA and 21.8 bits @ 64× PGA, with equivalent input noise as low as 8nV/√Hz, offset voltage of 1μV, and offset temperature coefficient below 10nV/℃. The output data rate is configurable from 3.125Hz to 6400Hz, or 6.25Hz to 12800Hz in high-power and frequency-doubling modes. Suitable for high-performance temperature sensors, analytical balances, industrial process control, DC/AC power measurement, instrumentation, and other applications requiring high-precision and low-offset measurements.

Features

Operating voltage range: 2.3~5.5V
Operating current: 380μA in normal mode, 280μA in low-power mode, 1μA in sleep mode
Built-in low-noise amplifier: configurable gain of 1/2/4/8/16/32/64/128×
16/8-channel signal input, configurable as 16/8 single-ended or 8/4 differential inputs
Integrated dual precision current sources and one voltage bias circuit, assignable to 16/8 input channels
Integrated 5ppm/℃, 2.5V high-precision voltage reference; load regulation < 60μV/mA
24-bit high-precision low-drift Sigma-Delta ADC
11 selectable decimation rates: 3.125Hz~6400Hz
Data rate 6.25Hz~12800Hz in high-power and frequency-doubling mode
50/60Hz simultaneous rejection
DC offset self-calibration
Linearity: 0.0005% FS, 24 effective bits
Noise level: 8nV/√Hz @ 128× PGA
Offset drift: 1μV @ 64/128× PGA
Integrated 2.4576MHz internal high-frequency RC clock; production frequency deviation < 1%, temperature drift 1% over -40~85℃
Precision clock input via external pin
Built-in low-impedance ground switch
Built-in high-precision temperature sensor; deviation within 1°C over -40~85℃