四路、128kHz、24 位同步采样 Σ-Δ ADC
Based on the single-channel ADS1271, the quad and ADS1278 octal are 24-bit, delta-sigma ΔΣ analog-to-digital converters ADCs with data rates up to 144k samples per second SPS, allowing simultaneous sampling of four or eight channels. The devices are offered in identical packages, permitting drop-in expandability.
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 ADS1274 and ADS1278 combine 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 0.005dB 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 devices are fully specified over the extended industrial range –40°C to +105°C and are available in an HTQFP-64 PowerPAD™ package.
70kHz Bandwidth
111dB SNR High-Resolution Mode
–108dB THD
0.8µV/°C Offset Drift
1.3ppm/°C Gain Drift
High-Speed: 144kSPS, 106dB SNR
High-Resolution: 52kSPS, 111dB SNR
Low-Power: 52kSPS, 31mW/ch
Low-Speed: 10kSPS, 7mW/ch
* APPLICAONS
PowerPAD is a trademark of Texas Instruments, Inc.
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners.
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
ADS1274 TI 德州仪器 | 当前型号 | 当前型号 |
ADS1174 德州仪器 | 功能相似 | ADS1274和ADS1174的区别 |
ADS1178 德州仪器 | 功能相似 | ADS1274和ADS1178的区别 |
ADS127L01 德州仪器 | 功能相似 | ADS1274和ADS127L01的区别 |