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ADS1232-ADS1232IPW-ADS1232IPWG4-ADS1232IPWR
24-Bit, Ultra Low-Noise Analog-to-Digital Converter 24-TSSOP -40 to 105
1FEATURES DESCRIPTION
APPLICATIONS
ADS1232
ADS1234SBAS350F–JUNE 2005–REVISED FEBRUARY 2008
www.ti.com
24-Bit Analog-to-Digital Converter
For Bridge Sensors Complete Front-End for Bridge Sensors The ADS1232 and ADS1234 are precision 24-bit
analog-to-digital converters (ADCs). With an onboard,•
Upto 23.5 Effective Bitslow-noise programmable gain amplifier (PGA),•
Onboard, Low-Noise PGA precision delta-sigma ADC and internal oscillator, the•
RMS Noise: ADS1232/4 providea complete front-end solution for
17nVat 10SPS (PGA= 128) bridge sensor applications including weigh scales,
44nVat 80SPS (PGA= 128) strain gauges and pressure sensors.
19.2-Bit Noise-Free Resolutionat Gain=64 The input multiplexer accepts either two (ADS1232)•
Over 100dB Simultaneous 50Hz and 60Hz or four (ADS1234) differential inputs. The ADS1232
also includes an onboard temperature sensor to
Rejectionmonitor ambient temperature. The onboard, low-noise•
Flexible Clocking: PGA hasa selectable gain of 1, 2, 64, or 128
Low-Drift Onboard Oscillator (±3%) supportinga full-scale differential input of ±2.5V,
Optional External Crystal ±1.25V, ±39mV,or ±19.5mV. The delta-sigma ADC•
Selectable Gainsof1,2, 64, and 128 has 23.5-bit effective
3rd-order modulator•
Easy Ratiometric Measurements–data rates are
External Voltage Reference upto 5V 60Hz rejection)•
Selectable 10SPSor 80SPS Data Rates clocked externally•
Two-Channel Differential Input with Built-In Thereis also
Temperature Sensor (ADS1232) requiresno external
performed on-demand•
Four-Channel Differential Input (ADS1234) put ina low-power•
Simple Serial Digital Interface completelyin•
Supply Range: 2.7Vto 5.3V the ADS1232/4
pin-driven control.•
–40°Cto +105°C Temperature Range programin order
Data are output
interface that•
Weigh Scales other microcontrollers.
