ADS1245IDGST集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS1245IDGST属于集成电路（IC）的模数转换器（ADC）。由美国德州仪器公司制造生产的ADS1245IDGST模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。

FEATURES

20-Bit Effective Resolution

High-Impedance Buffered Input

±2.5V Differential Input Range

Pin-Compatible with ADS1244

0.0006% INL (typ), 0.0015% INL (max)

Simple Two-Wire Serial Interface

Simultaneous 50Hz and 60Hz Rejection

Single Conversions with Sleep Mode

Single-Cycle Settling

Self-Calibration

Well Suited for Multi-Channel Systems

Easily Connects to the MSP430

Current Consumption: 158μA

Analog Supply: 2.5V to 5.25V

Digital Supply: 1.8V to 3.6V

APPLICATIONS

Hand-Held Instrumentation

Portable Medical Equipment

Industrial Process Control

Test and Measurement Systems

DESCRIPTION

The ADS1245 is a 24-bit, delta-sigma analog-to-digital

converter (ADC). It offers excellent performance and very

low power in an MSOP-10 package and is well suited for

demanding high-resolution measurements, especially in

portable and other space- and power-constrained

systems.

The buffered input presents an impedance of 3GΩ, minimizing

measurement errors when using high-impedance

sources. The ADS1245 is compatible with ADS1244 and

offers a direct upgrade path for designs requiring higher input

impedance.

A third-order delta-sigma (ΔΣ) modulator and digital filter

form the basis of the ADC. The analog modulator has a

±2.5V differential input range. The digital filter rejects both

50Hz and 60Hz signals, completely settles in one cycle,

and outputs data at 15 samples per second (SPS).

A simple, two-wire serial interface provides all the

necessary control. Data retrieval, self-calibration, and

Sleep mode are handled with a few simple waveforms.

When only single conversions are needed, the ADS1245

can be shut down (Sleep mode) while idle between

measurements to dramatically reduce the overall power

dissipation. Multiple ADS1245s can be connected

together to create a synchronously sampling multichannel

measurement system. The ADS1245 is designed to easily

connect to microcontrollers, such as the MSP430.

The ADS1245 supports 2.5V to 5.25V analog supplies and

1.8V to 3.6V digital supplies. Power is typically less than

470μW in normal operation and less than 1μW during

Sleep mode.