文件名称:
ads1248 24bit ADC 8 ch
开发工具:
文件大小: 1mb
下载次数: 0
上传时间: 2015-06-05
详细说明： DESCRIPTION The ADS1246, ADS1247, and ADS1248 are 23 • 24 Bits, No Missing Codes highly-integrated, precision, 24-bit analog-to-digital • Data Output Rates Up to 2kSPS converters (ADCs). The ADS1246/7/8 feature an • Single-Cycle Settling for All Data Rates onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a • Simultaneous 50/60Hz Rejection at 20SPS single-cycle settling digital filter, and an internal • 4 Differential/7 Single-Ended Inputs (ADS1248) oscillator. The ADS1247 and ADS1248 a lso provide a • 2 Differential/3 Single-Ended Inputs (ADS1247) built-in, very low drift voltage reference with 10mA output capacity, and two matched programmable • Low-Noise PGA: 48nV at PGA = 128 current digital-to-analog converters (DACs). The • Matched Current Source DACs ADS1246/7/8 provide a complete front-end solution • Very Low Drift Internal Voltage Reference: for temperature sensor applications including thermal 10ppm/°C (max) couples, thermistors, and RTDs. • Sensor Burnout Detection An input multiplexer supports four differential inputs • 4/8 General-Purpose I/Os (ADS1247/8) for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a • Internal Temperature Sensor sensor burnout detect, voltage bias for • Power Supply and V REF Monitoring thermocouples, system monitoring, and (ADS1247/8) general-purpose digital I/Os (ADS1247 and • Self and System Calibration ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The ΔΣ modulator and • SPI™-Compatible Serial Interface adjustable digital filter settle in only one cycle, for fast • Analog Supply Unipolar (+2.7V to channel cycling when using the input multiplexer, and +5.25V)/Bipolar (±2.5V) Operation support data rates up to 2kSPS. For data rates of • Digital Supply: +2.7V to +5.25V 20SPS or less, both 50Hz and 60Hz interference are rejected by the filter. • Operating Temperature –40°C to +125°C The ADS1246 is offered in a small TSSOP-16 APPLICATIONS package, the ADS1247 is available in a TSSOP-20 package, and the ADS1248 in a TSSOP-28 package. • Temperature Measurement All three devices are rated over the extended – RTDs, Thermocouples, and Thermistors specified temperature range of –40°C to +1 ...展开收缩
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