ADS1271IPW集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS1271IPW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ADS1271IPW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

105kSPS Data Rate

AC Performance:

51kHz Bandwidth

109dB SNR (High-Resolution Mode)

−108dB THD

DC Accuracy:

1.8μV/°C Offset Drift

2ppm/°C Gain Drift

Selectable Operating Modes:

High-Speed: 105kSPS Data Rate

High-Resolution: 109dB SNR

Low-Power: 35mW Dissipation

Power-Down Control

Digital Filter:

Linear Phase Response

Passband Ripple: ±0.005dB

Stop Band Attenuation: 100dB

Internal Offset Calibration On Command

Selectable SPI or Frame Sync Serial Interface

Designed for Multichannel Systems:

Daisy-Chainable Serial Interface

Easy Synchronization

Simple Pin-Driven Control

Modulator Output Option

Specified from −40°C to +105°C

Analog Supply: 5V

Digital Supply: 1.8V to 3.3V

APPLICATIONS

Vibration/Modal Analysis

Acoustics

Dynamic Strain Gauges

Pressure Sensors

Test and Measurement

DESCRIPTION

The ADS1271 is a 24-bit, delta-sigma analog-to-digital

converter (ADC) with a data rate up to 105kSPS. It offers

a unique combination of excellent DC accuracy and

outstanding AC performance. The high-order,

chopper-stabilized modulator achieves very low drift with

low in-band noise. The onboard decimation filter

suppresses modulator and signal out-of-band noise. The

ADS1271 provides a usable signal bandwidth up to 90%

of the Nyquist rate with less than 0.005dB of ripple.

Traditionally, industrial delta-sigma ADCs offering good

drift performance use digital filters with large passband

droop. As a result, they have limited signal bandwidth and

are mostly suited for DC measurements. High-resolution

ADCs in audio applications offer larger usable bandwidths,

but the offset and drift specification are significantly

weaker than their industrial counterparts. The ADS1271

combines these converters, allowing high-precision

industrial measurement with excellent DC and AC

specifications ensured over an extended industrial

temperature range.

Three operating modes allow for optimization of speed,

resolution, and power. A selectable SPI or a frame-sync

serial interface provides for convenient interfacing to

microcontrollers or DSPs. The output from the modulator

is accessible for external digital filter applications. All

operations, including internal offset calibration, are

controlled directly by pins; there are no registers to

program.