ADS1235
- 24-Bit, High-Precision ADC
- 120,000 Noise-Free Counts
(10-mV Input, 10 SPS) - Offset Drift: 1 nV/°C
- Gain Drift: 0.5 ppm/°C
- 120,000 Noise-Free Counts
- Three Differential or Five Single-Ended Inputs
- Two Reference Inputs
- Wide Input Voltage Range: ±7 mV to ±5 V
- Low-Noise PGA, Gain: 1, 64, and 128
- Data Rate: 2.5 SPS to 7200 SPS
- AC- or DC-Bridge Excitation Option
- Chop Mode for Zero Drift Operation
- Simultaneous 50-Hz and 60-Hz Rejection Mode
- Single-Cycle Settling Mode
- Missing Reference Input Monitor
- Signal Overrange Monitor
- Temperature Sensor
- Cyclic Redundancy Check (CRC)
- 5-V or ±2.5-V Power Supply
The ADS1235 is a precision, 7200-SPS, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). This device also includes diagnostic features such as PGA overrange and reference monitors. The ADC provides high-accuracy, zero-drift conversion data for high-precision equipment, including weigh scales, strain gauges, and resistive pressure sensors.
The ADC has signal and reference multiplexers that support three differential signal inputs and two reference inputs. The ADC also includes a low-noise PGA that provides gains of 1, 64, and 128. The ADC also has a 24-bit ΔΣ modulator and programmable digital filter.
The high-impedance inputs (1 GΩ) of the PGA reduce measurement error that is caused by sensor loading.
The ADC supports ac-bridge excitation to remove the drift errors from the sensor wiring. The ADC provides the clock control signals for the ac-excitation operation.
The flexible digital filter is programmable for single-cycle settled conversions, and provides 50-Hz and 60-Hz line cycle rejection at the same time.
The ADS1235 is available in a 5-mm × 5-mm QFN package, and is specified across the –40°C to +125°C temperature range.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet | PDF | HTML | 2018年 9月 28日 |
Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2024年 3月 18日 | |
Application note | A Basic Guide to Bridge Measurements (Rev. A) | PDF | HTML | 2024年 3月 13日 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 2023年 3月 29日 | |
Application note | Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) | PDF | HTML | 2021年 8月 23日 | |
Application brief | Reduce Bridge Measurement Offset and Drift Using the AC Excitation Mode (Rev. A) | PDF | HTML | 2021年 4月 1日 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 2020年 6月 19日 | ||
EVM User's guide | ADS1261 and ADS1235 Evaluation Module User's Guide (Rev. A) | 2018年 9月 28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)。
ADS1235EVM — ADS1235 評估模組
The ADS1235 evaluation module (EVM) is a platform for evaluating the ADS1235 analog-to-digital converter (ADC). ADS1235 is a low-drift, 24-bit, 7200-SPS, 6-channel delta-sigma (ΔΣ) ADC with an integrated PGA for low-noise bridge measurements. This sensor-ready ADC provides a (...)
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)
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
RF 接收器
RF 發射器
ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.
支援產品和硬體
產品
系列電壓參考
精確 ADC
生物感測 AFE
整合式精密 ADC 與 DAC
高速 ADC (≥10 MSPS)
精密 DAC (≤10 MSPS)
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 |
---|---|---|
VQFN (RHB) | 32 | 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。