ADS1232 24-bit ADC

Name: ADS1232 24-bit ADC
Brand: Texas Instruments

ADS1232

Texas Instrumentsic data converter

The ADS1232 is a 24-bit delta-sigma ADC designed for bridge sensor applications, providing high resolution and low noise performance.

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Specifications

Operating Voltage: 2.7V to 5.3V (AVDD, DVDD)
Supply Current: 600µA to 2500µA (normal mode), 0.1µA to 1µA (standby mode) (AVDD = DVDD = 3V/5V, gain = 1-128)
Interface: SPI
Resolution: 24 bits (no missing codes)
Range: ±0.5VREF / Gain for full-scale input (gain = 1-2), ±(AVDD - AGND) / Gain for full-scale input (gain = 64, 128)
Accuracy: ±0.0002% of FSR at gain = 1, 2 (INL), ±0.0004% of FSR at gain = 64, 128 (INL)
Temperature Range: -40°C to +105°C

Pin	Name	Functions	Notes
1	DVDD	POWER	Digital power supply
24	DRDY/DOUT	GPIO	Data ready/output, dual-purpose pin
2	DGND	GND	Digital ground
3	CLKIN/XTAL1	GPIO	External crystal connection or external clock input
4	XTAL2	GPIO	External crystal connection 2
5	DGND	GND	Digital ground
6	DGND	GND	Digital ground
7	TEMP	GPIO	Temperature sensor select
18	AVDD	POWER	Analog power supply: 2.7V to 5.3V
9, 10	CAP	GPIO	PGA bypass, connect a 0.1µF capacitor across pins 9 and 10
11	AINP1	ADC	Positive analog input channel 1
12	AINN1	ADC	Negative analog input channel 1
14	AINP2	ADC	Positive analog input channel 2
13	AINN2	ADC	Negative analog input channel 2
16	REFP	ADC	Positive reference input
15	REFN	ADC	Negative reference input
22	PDWN	GPIO	Power-down: hold this pin low to power down and reset the ADC. Toggle the pin at device power-up.
19, 20	GAIN0, GAIN1	GPIO	Gain select pins
23	SCLK	SPI	Serial clock: clock out data on the rising edge. Also used to initiate offset calibration and standby modes.
21	SPEED	GPIO	Data rate select

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ADS1232

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