ADS1146 - 用于温度传感器的 16 位模数转换器

ADS1146是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1146是用于温度传感器的 16 位模数转换器，本站介绍了ADS1146的封装应用图解、特点和优点、功能等，并给出了与ADS1146相关的TI元器件型号供参考。

ADS1146 - 用于温度传感器的 16 位模数转换器 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADS1146, ADS1147, and ADS1148 are highly-integrated, precision, 16-bit analog-to-digital converters (ADCs). The ADS1146/7/8 feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1147 and ADS1148 also provide a built-in voltage reference with 10mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The ADS1146/7/8 provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).

An input multiplexer supports four differential inputs for the ADS1148, two for the ADS1147, and one for the ADS1146. In addition, the multiplexer has a sensor burnout detect, voltage bias for thermocouples, system monitoring, and general-purpose digital I/Os (ADS1147 and ADS1148). The onboard, low-noise PGA provides selectable gains of 1 to 128. The delta-sigma modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2kSPS. For data rates of 20SPS or less, both 50Hz and 60Hz interference are rejected by the filter.

The ADS1146 is offered in a small TSSOP-16 package, the ADS1147 is available in a TSSOP-20 package, and the ADS1148 is available in TSSOP-28 and QFN-32 packages. All three devices operate over the extended specified temperature range of –40°C to +105°C.

产品特性

16 Bits, No Missing Codes
Data Output Rates Up to 2kSPS
Single-Cycle Settling for All Data Rates
Simultaneous 50/60Hz Rejection at 20SPS
4 Differential/7 Single-Ended Inputs (ADS1148)
2 Differential/3 Single-Ended Inputs (ADS1147)
Matched Current Source DACs
Internal Voltage Reference
Sensor Burnout Detection
4/8 General-Purpose I/Os (ADS1147/8)
Internal Temperature Sensor
Power Supply and VREF Monitoring (ADS1147/8)
Self and System Calibration
SPI™-Compatible Serial Interface
Analog Supply Operation: +2.7V to +5.25V Unipolar, ±2.5V Bipolar
Digital Supply: +2.7V to +5.25V
Operating Temperature –40°C to +125°C

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