ADS1278-HT - 高温四路/八路 24 位同步采样模数转换器

ADS1278-HT是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS1278-HT是高温四路/八路 24 位同步采样模数转换器，本站介绍了ADS1278-HT的封装应用图解、特点和优点、功能等，并给出了与ADS1278-HT相关的TI元器件型号供参考。

ADS1278-HT - 高温四路/八路 24 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

Based on the single-channel ADS1271, the ADS1278 (octal) is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with data rates up to 128 k samples per second (SPS), allowing simultaneous sampling of eight channels.

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 specifications are significantly weaker than respective industrial counterparts. The ADS1278 combines these types of converters, allowing high-precision industrial measurement with excellent dc and ac specifications.

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. These ADCs provide a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005 dB of ripple.

Four operating modes allow for optimization of speed, resolution, and power. All operations are controlled directly by pins; there are no registers to program. The device is fully specified over the extended industrial range (–55°C to 210°C) and is available in an HTQFP-64 PowerPAD package (–55°C to 175°C), an 84-pin HFQ package and a KGD chiptray option.

产品特性

Simultaneously Measure Eight Channels
Up to 128-kSPS Data Rate
AC Performance: 62-kHz Bandwidth 111-dB SNR (High-Resolution Mode) –108-dB THD
DC Accuracy: 0.8-µV/°C Offset Drift 1.3-ppm/°C Gain Drift
Selectable Operating Modes: High-Speed: 128 kSPS, 106 dB SNR High-Resolution: 52 kSPS, 111 dB SNR Low-Power: 52 kSPS, 31 mW/ch Low-Speed: 10 kSPS, 7 mW/ch
Linear Phase Digital Filter
SPI or Frame-Sync Serial Interface
Low Sampling Aperture Error
Modulator Output Option (digital filter bypass)
Analog Supply: 5 V
Digital Core: 1.8 V
I/O Supply: 1.8 V to 3.3 V
Currently Available in an HTQFP-64 PowerPAD™ package, an 84-Pin HFQ Package and a KGD Chiptray Option
Supports Extreme Temperature Applications
- Controlled Baseline
- One Assembly/Test Site
- One Fabrication Site
- Available in Extreme (–55°C/210°C) Temperature Range(1)
- Extended Product Life Cycle
- Extended Product-Change Notification
- Product Traceability
- Texas Instruments High Temperature Products Utilize Highly Optimized Silicon (Die) Solutions With Dsign and Process Enhancements to Maximize Performance Over Extended Temperatures
APPLICATIONS
- Down-Hole Drilling
- High Temperature Environments
- Vibration/Modal Analysis
- Multi-Channel Data Acquisition
- Acoustics/Dynamic Strain Gauges
- Pressure Sensors

(1) Custom temperature ranges available All other trademarks are the property of their respective owners

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