ADS1178 - 八路 16 位同步采样模数转换器

ADS1178是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1178是八路 16 位同步采样模数转换器，本站介绍了ADS1178的封装应用图解、特点和优点、功能等，并给出了与ADS1178相关的TI元器件型号供参考。

ADS1178 - 八路 16 位同步采样模数转换器 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADS1174 (quad) and ADS1178 (octal) are multiple delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with data rates up to 52k samples-per-second (SPS), which allow synchronous sampling of four and eight channels. These devices use identical packages, and are also compatible with the high-performance 24-bit ADS1274 and ADS1278, permitting drop-in upgrades.

The delta-sigma architecture offers near ideal 16-bit ac performance (97dB SNR, -105dB THD, 1LSB linearity) combined with 0.005dB passband ripple and linear phase response.

The high-order, chopper-stabilized modulator achieves very low drift (2µV/°C offset, 2ppm/°C gain) and low noise (1LSBPP). The on-chip finite impulse response (FIR) filter provides a usable signal bandwidth up to 90% of the Nyquist rate with 100dB of stop band attenuation while suppressing modulator and signal out-of-band noise.

Two operating modes allow for optimization of speed and power: High-speed mode (31mW/Ch at 52kSPS), and Low-power mode (7mW/Ch at 10kSPS).

A SYNC input control pin allows the device conversions to be started and synchronized to an external event. SPI and Frame-Sync serial interfaces are supported. The device is fully specified over the extended industrial range (40°C to +105°C) and is available in an HTQFP-64 PowerPAD package.

产品特性

Simultaneously Sample Four/Eight Channels
Selectable Operating Modes:High-Speed: 52kSPS Data Rate, 31mW/chLow-Power: 10kSPS Data Rate, 7mW/ch
AC Performance:25kHz Bandwidth97dB SNR-105dB THD
DC Performance:2µV/°C Offset Drift2ppm/°C Gain Drift
Digital Filter:Linear Phase ResponsePassband Ripple: ±0.005dBStop Band Attenuation: 100dB
Selectable SPI or Frame Sync Serial Interface
Simple Pin-Driven Control
Low Sampling Aperture Error
Specified from -40°C to +105°C
Analog Supply: 5V
I/O Supply: 1.8V to 3.3V
Digital Core Supply: 1.8V
APPLICATIONS
- 3-Phase Power Monitors
- Defibrillators and ECG Monitors
- Coriolis Flow Meters
- Vibration/Modal Analysis

PowerPAD is a trademark of Texas Instruments. SPI is a trademark of Motorola, Inc.

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