ADS8881
- Sample Rate: 1 MHz
- No Latency Output
- Unipolar, True-Differential Input Range:
–VREF to +VREF - Wide Common-Mode Voltage Range:
0 V to VREF with 90-dB CMRR (min) - SPI™-Compatible Serial Interface with
Daisy-Chain Option - Excellent AC and DC Performance:
- ADS8881C:
INL: ±1 LSB (typ), ±2.0 LSB (max)
DNL: ±1.0 LSB (max), 18-Bit NMC
SNR: 100 dB, THD: –115 dB - ADS8881I:
INL: ±1.5 LSB (typ), ±3.0 LSB (max)
DNL: +1.5 and –1 LSB (max), 18-Bit NMC
SNR: 100 dB, THD: –115 dB
- ADS8881C:
- Wide Operating Range:
- AVDD: 2.7 V to 3.6 V
- DVDD: 2.7 V to 3.6 V
(Independent of AVDD) - REF: 2.5 V to 5 V (Independent of AVDD)
- Operating Temperature:
ADS8881C : 0°C to +70°C
ADS8881I : –40°C to +85°C
- Low-Power Dissipation:
- 5.5 mW at 1 MSPS
- 0.55 mW at 100 kSPS
- 55 µW at 10 kSPS
- Power-Down Current (AVDD): 50 nA
- Full-Scale Step Settling to 18 Bits: 290 ns
- Packages: MSOP-10 and VSON-10
The ADS8881 is an 18-bit, 1-MSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).
The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit makes synchronizing with the digital host easy.
The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).
Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8881 excellent for lower-speed applications.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | ADS8881x 18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter datasheet (Rev. D) | PDF | HTML | 2015年 8月 11日 |
Application note | Continuous Wave Doppler Signal Chain Designs for TI’s Ultrasound AFE (Rev. A) | PDF | HTML | 2024年 5月 22日 | |
Application brief | Understanding and Using SAR ADC SPICE Micromodel | PDF | HTML | 2021年 11月 23日 | |
E-book | Tips and tricks for designing with voltage references (Rev. A) | 2021年 5月 7日 | ||
Circuit design | Circuit for protecting low-voltage SAR ADC from electrical overstress with minim | 2019年 5月 25日 | ||
User guide | ADS8881EVMV2-PDK User's Guide (Rev. A) | 2017年 10月 4日 | ||
User guide | ADS8881EVMV2-PDK User's Guide | 2017年 5月 8日 | ||
White paper | Voltage-reference impact on total harmonic distortion | 2016年 8月 1日 | ||
More literature | SAR ADCs for PLC Applications | 2016年 2月 11日 | ||
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 2015年 5月 21日 | ||
EVM User's guide | ADS8881EVM User's Guide | 2013年 6月 6日 |
設計與開發
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封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
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VSON (DRC) | 10 | Ultra Librarian |
VSSOP (DGS) | 10 | Ultra Librarian |
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