ADS8885
- Sample Rate: 400 kHz
- 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:
- SNR: 100 dB, THD: –115 dB
- INL: ±1.5 LSB (typ), ±3.0 LSB (max)
- DNL: +1.5 and –1 LSB (max), 18-Bit NMC
- Wide Operating Range:
- AVDD: 2.7 V to 3.6 V
- DVDD: 1.65 V to 3.6 V
(Independent of AVDD) - REF: 2.5 V to 5 V (Independent of AVDD)
- Operating Temperature: –40°C to +85°C
- Low-Power Dissipation:
- 2.6 mW at 400 kSPS
- 0.65 mW at 100 kSPS
- 65 µW at 10 kSPS
- Power-Down Current (AVDD): 50 nA
- Full-Scale Step Settling to 18 Bits: 1200 ns
- Packages: MSOP-10 and SON-10
The ADS8885 is an 18-bit, 400-kSPS, 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 ADS8885 excellent for lower-speed applications.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | 18-Bit, 400-kSPS, Serial Interface, microPower, Miniature, True-Differential Inp datasheet (Rev. A) | 2013年 12月 17日 | |
Circuit design | Circuit for protecting low-voltage SAR ADC from electrical overstress with minim (Rev. A) | PDF | HTML | 2024年 9月 19日 | |
White paper | Voltage-reference impact on total harmonic distortion | 2016年 8月 1日 | ||
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 2015年 5月 21日 |
設計與開發
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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VSSOP (DGS) | 10 | Ultra Librarian |
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