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
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | ADS8881x 18-Bit, 1-MSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter datasheet (Rev. D) | PDF | HTML | 2015/8/11 | ||
| Circuit design | Circuit for protecting low-voltage SAR ADC from electrical overstress with minim (Rev. A) | PDF | HTML | 2024/9/19 | |||
| 應用說明 | Continuous Wave Doppler Signal Chain Designs for TI’s Ultrasound AFE (Rev. A) | PDF | HTML | 2024/5/22 | |||
| Application brief | Understanding and Using SAR ADC SPICE Micromodel | PDF | HTML | 2021/11/23 | |||
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| 使用指南 | ADS8881EVMV2-PDK User's Guide (Rev. A) | 2017/10/4 | ||||
| 白皮書 | Voltage-reference impact on total harmonic distortion | 2016/8/1 | ||||
| 更多文件說明 | SAR ADCs for PLC Applications | PDF | HTML | 2016/2/11 | |||
| 電子書 | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 2015/5/21 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
ADS8881EVMV2-PDK — ADS8881 18 位元 1 MSPS 序列介面 SAR ADC 評估模組 V2 PDK
PSIEVM — 適用於測試 ADC 性能的精密訊號噴射器 PSI 評估模組
精密信號注入器 (PSI) 是一個用於評估逐次逼近暫存器 (SAR) 類比數位轉換器 (ADC) 效能的平台。電路板提供低失真、低雜訊、2kHz 輸入訊號，用於驅動 ADC 的輸入，並可與大多數 TI SAR 的 ADC 評估模組配對。電路板透過 USB 供電，同時也提供與 PC 的使用者介面連接。
REF6025EVM-PDK — REF6025 電壓參考評估模組
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
TIPD112 — 適用於多工器和步進輸入的資料採集、18 位元、1uS 全幅反應參考設計
This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide 18-bit settling performance for a Full Scale Step Input signal, thus leading to excellent system linearity. Such an input (...)
TIPD113 — 10 kHz AC、35mW、18 位元、1 Msps 資料採集參考設計
This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide the lowest power solution for a full scale input sine wave of 10 KHz. At a total power consumption of less than 35mW, this (...)
TIPD114 — 1KHz AC、1mW、18 位元、1Msps 資料擷取參考設計
This verified design provides results of a low power, low throughput use case of ADS8881. One of the ways to reduce power for a low throughput application is to select a high throughput (1 MSPS) part and run it at low speed. The power consumed by ADS8881 is 55uW for 10kSPS. The reference drive and (...)
TIPD115 — 採用最低失真、最低雜訊最佳化設定的 18 位元、1 MSPS 資料採集參考設計
This verified design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide the lowest noise & distortion solution for a full scale input sinewave of 10 KHz. This leads to a maximum possible value (...)
TIPD116 — 適用於 ECG 系統的資料擷取區塊、分離式 LEAD I ECG 實作參考設計
This verified design is for Electrocardiography (ECG), the measurement of the electrical activity of the heart, a method that requires a precision analog front end instrumentation gain stage, filtering, and high resolution digital conversion. This design features the methodology for achieving a (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
| VSON (DRC) | 10 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。