ADS1217 - 8 通道 24 位模数转换器

ADS1217是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1217是8 通道 24 位模数转换器，本站介绍了ADS1217的封装应用图解、特点和优点、功能等，并给出了与ADS1217相关的TI元器件型号供参考。

ADS1217 - 8 通道 24 位模数转换器 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADS1217 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.

The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog Converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a 2nd-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric cancellation. The onboard current DACs operate independently with the maximum current set by an external resistor.

The serial interface is SPI compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1217 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation.

产品特性

24 BITS NO MISSING CODES
INL: 0.0012% of FSR max
FULL-SCALE INPUT = ±2VREF
PGA FROM 1 TO 128
22 BITS EFFECTIVE RESOLUTION (PGA =1), 19 BITS (PGA = 128)
SINGLE CYCLE SETTLING MODE
PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
ON-CHIP 1.25V/2.5V REFERENCE
ON-CHIP CALIBRATION
SPI COMPATIBLE
POWER SUPPLY: 2.7V to 5.25V
< 1mW POWER CONSUMPTION, VDD = 3V
APPLICATIONS
- INDUSTRIAL PROCESS CONTROL
- LIQUID/GAS CHROMATOGRAPHY
- BLOOD ANALYSIS
- SMART TRANSMITTERS
- PORTABLE INSTRUMENTATION
- WEIGH SCALES
- PRESSURE TRANSDUCERS

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