ADS7871
- PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
- Programmable Input (Up to 4-Channel Differential/Up to 8-Channel Single-Ended or Some Combination)
- 1.15-V, 2.048-V, or 2.5-V Internal Reference
- SPI/DSP Compatible Serial Interface ( 20 MHz)
- Throughput Rate: 48 kSamples/sec
- Error Overload Indicator
- Programmable Output 2s Complement/Binary
- 2.7-V to 5.5-V Single Supply Operation
- 4-Bit Digital I/O Via Serial Interface
- Pin Compatible With ADS7870
- SSOP-28 Package
- APPLICATIONS
- Portable Battery-Powered Systems
- Low-Power Instrumentation
- Low-Power Control Systems
- Smart Sensor Applications
All trademarks are the property of their respective owners.
The ADS7871 (US patents 6140872, 6060874) is a complete low power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 14-bit successive approximation analog-to-digital (A/D) converter and a precision voltage reference.
The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.
For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.
The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.
The ADS7871 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7871s share a common reference.
The serial interface allows the use of SPI, QSPI, Microwire, and 8051-family protocols, without glue logic.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | ADS7871: 14-Bit A/D Converter, MUX, PGA & Internal Reference DAQ System datasheet (Rev. C) | 2004年 10月 4日 | |
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 2015年 5月 21日 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | 2011年 3月 17日 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) | 2010年 11月 10日 | ||
User guide | ADS7870/ADS7871 EVM | 2003年 9月 9日 |
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)。
ADS7871SW-LINUX — 適用於 ADS7871 的 Linux 驅動程式
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: (...)
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 (...)
支援產品和硬體
產品
精密度運算放大器 (Vos<1mV)
一般用途運算放大器
音訊運算放大器
轉阻放大器
高速運算放大器 (GBW ≥ 50 MHz)
功率運算放大器
視訊放大器
線路驅動器
轉導放大器與雷射驅動器
全差分放大器
精確 ADC
生物感測 AFE
高速 ADC (≥10 MSPS)
接收器
觸控式螢幕控制器
差分放大器
儀器放大器
音訊線路接收器
類比電流感測放大器
數位電源監測器
配備整合式分流電阻器的類比電流感測放大器
具整合式分流電阻器的數位電源監測器
晶粒與晶圓服務
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
SSOP (DB) | 28 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
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。