TI ADS1211U

The ADS1210 and ADS1211 are precision, wide dynamic range, delta-sigma Analog-to-Digital (A/D) converters with 24-bit resolution operating from a single +5V supply. The differential inputs are ideal for direct connection to transducers or low-level voltage signals. The delta-sigma architecture is used for wide dynamic range and to ensure 22 bits of no-missing-code performance. An effective resolution of 23 bits is achieved through the use of a very low-noise input amplifier at conversion rates up to 10Hz. Effective resolutions of 20 bits can be maintained up to a sample rate of 1kHz through the use of the unique Turbo modulator mode of operation. The dynamic range of the converters is further increased by providing a low-noise programmable gain amplifier with a gain range of 1 to 16 in binary steps. The ADS1210 and ADS1211 are designed for high resolution measurement applications in smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation. Both converters include a flexible synchronous serial interface that is SPI-compatible and also offers a two-wire control mode for low cost isolation. The ADS1210 is a single-channel converter and is offered in both 18-pin DIP and 18-lead SOIC packages. The ADS1211 includes a 4-channel input multiplexer and is available in 24-pin DIP, 24-lead SOIC, and 28-lead SSOP packages.

• DELTA-SIGMA A/D CONVERTER 23 BITS EFFECTIVE RESOLUTION AT 10Hz AND 20 BITS AT 1000Hz
• DIFFERENTIAL INPUTS
• PROGRAMMABLE GAIN AMPLIFIER FLEXIBLE SPI™-COMPATIBLE SSI INTERFACE WITH 2-WIRE MODE
• PROGRAMMABLE CUT-OFF FREQUENCY UP TO 15.6kHz
• INTERNAL/EXTERNAL REFERENCE
• ON-CHIP SELF-CALIBRATION
• ADS1211 INCLUDES 4-CHANNEL MUX

• INDUSTRIAL PROCESS CONTROL
• INSTRUMENTATION
• BLOOD ANALYSIS
• SMART TRANSMITTERS
• PORTABLE INSTRUMENTS
• WEIGH SCALES
• PRESSURE TRANSDUCERS