八路同步采样24位模拟数字转换器 OCTAL SIMULTANEOUS-SAMPLING 24-BIT ANALOG-TO-DIGITAL CONVERTER
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.
电源电压DC 4.75V min
供电电流 97.0 mA
电路数 8
通道数 8
位数 24
耗散功率 530 mW
采样率 128 ksps
功耗 530 mW
模数转换数ADC 8
工作温度Max 210 ℃
工作温度Min -55 ℃
耗散功率Max 785 mW
输入通道数 8
电源电压Max 5.25 V
电源电压Min 4.75 V
安装方式 Surface Mount
引脚数 84
封装 CFP-84
封装 CFP-84
产品生命周期 Active
包装方式 Each
RoHS标准 RoHS Compliant
含铅标准 Contains Lead
REACH SVHC版本 2015/06/15
ECCN代码 3A001A2A