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類比轉數位轉換器 (ADC)
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ADS1235

現行

適用於橋感測器且具有 PGA 和 AC 激磁的 24 位元、7.2-kSPS、3 通道差動、delta-sigma ADC

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產品規格表

ADS1235

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 7.2 Number of input channels 5 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5, 5 Input voltage range (min) (V) -2.5, 0 Features 50/60 Hz Rejection, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 23 Analog supply voltage (min) (V) -2.5, 4.75 Analog supply voltage (max) (V) 2.5, 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 7.2 Number of input channels 5 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5, 5 Input voltage range (min) (V) -2.5, 0 Features 50/60 Hz Rejection, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 23 Analog supply voltage (min) (V) -2.5, 4.75 Analog supply voltage (max) (V) 2.5, 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
VQFN (RHB) 32 25 mm² (5 mm × 5 mm)
  • 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
  • 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
  • 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
  • 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.

 

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.

 
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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 ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet PDF | HTML 2018/9/28
應用說明 Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 2024/3/18
應用說明 A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 2024/3/13
應用說明 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
應用說明 Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 2021/8/23
Application brief Reduce Bridge Measurement Offset and Drift Using the AC Excitation Mode (Rev. A) PDF | HTML 2021/4/1
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19

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)。

開發板

ADS1235EVM — ADS1235 評估模組

ADS1235 評估模組 (EVM) 是用於評估 ADS1235 類比轉數位轉換器 (ADC) 的平台。ADS1235 是一款低漂移，24 位元，7200-SPS，6 通道 delta-sigma (ΔΣ) ADC，搭載整合式 PGA，適用於低雜訊橋量測。這套含感測器功能的 ADC 提供高準確度，單晶片量測解決方案，適合最嚴苛要求的測試與量測儀器，其中包括磅秤，應變規感測器與高解析度壓力量測。

提供 ADS1235EVM 和 ΔΣ EvaluaTIon 軟體 (DELTASIGMAEVAL-GUI) 以縮短原型開發時間，加快產品上市速度。

使用指南: PDF
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支援軟體

ADS1235-C-EXAMPLE-CODE — ADS1235 example C code

Expedite your embedded design using this example C code for the ADS1235
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模擬型號

ADS1235 IBIS Model

SBAM401.ZIP (46 KB) - IBIS 模型
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計算工具

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。

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計算工具

SBAR015 — ADS1235 Design Calculator

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設計工具

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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VQFN (RHB) 32 Ultra Librarian
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