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類比轉數位轉換器 (ADC)
精確 ADC

ADS125H02

現行

具有 ±20V 輸入、PGA、IDAC、GPIO 和 VREF 的 24 位元、40 kSPS、雙通道 Delta-Sigma ADC

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產品規格表

ADS125H02

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 40 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 15.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 45 Analog supply voltage (min) (V) -18, 0 Analog supply voltage (max) (V) 18, 36 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 40 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 15.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 45 Analog supply voltage (min) (V) -18, 0 Analog supply voltage (max) (V) 18, 36 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
VQFN (RHB) 32 25 mm² (5 mm × 5 mm)
  • ±20-V input, 24-bit delta-sigma ADC
  • Programmable data rate: 2.5 SPS to 40 kSPS
  • High-voltage, high-impedance PGA:
    • Differential input range: up to ±20 V
    • Programmable gain: 0.125 to 128
    • Common-mode input voltage: up to ±15.5 V
    • Input impedance: 1 GΩ (minimum)
  • High-performance ADC:
    • Input noise: 45 nVRMS (20 SPS)
    • CMRR: 105 dB
    • Normal-mode rejection at 50 Hz, 60 Hz: 95 dB
    • Offset drift: 5 nV/°C
    • Gain drift: 1 ppm/°C
    • INL: 2 ppm
  • Integrated features and diagnostics:
    • 2.5-V reference: 3 ppm/°C drift
    • Clock oscillator: 2.5% error (maximum)
    • Excitation current sources
    • GPIO to drive external mux
    • Signal and reference voltage monitors
    • Cyclic redundancy check (CRC)
  • Power supplies:
    • AVDD: 4.75 V to 5.25 V
    • DVDD: 2.7 V to 5.25 V
    • HVDD: ±5 V to ±18 V
  • Operating temperature: –40°C to +125°C
  • 5-mm × 5-mm VQFN package
  • ±20-V input, 24-bit delta-sigma ADC
  • Programmable data rate: 2.5 SPS to 40 kSPS
  • High-voltage, high-impedance PGA:
    • Differential input range: up to ±20 V
    • Programmable gain: 0.125 to 128
    • Common-mode input voltage: up to ±15.5 V
    • Input impedance: 1 GΩ (minimum)
  • High-performance ADC:
    • Input noise: 45 nVRMS (20 SPS)
    • CMRR: 105 dB
    • Normal-mode rejection at 50 Hz, 60 Hz: 95 dB
    • Offset drift: 5 nV/°C
    • Gain drift: 1 ppm/°C
    • INL: 2 ppm
  • Integrated features and diagnostics:
    • 2.5-V reference: 3 ppm/°C drift
    • Clock oscillator: 2.5% error (maximum)
    • Excitation current sources
    • GPIO to drive external mux
    • Signal and reference voltage monitors
    • Cyclic redundancy check (CRC)
  • Power supplies:
    • AVDD: 4.75 V to 5.25 V
    • DVDD: 2.7 V to 5.25 V
    • HVDD: ±5 V to ±18 V
  • Operating temperature: –40°C to +125°C
  • 5-mm × 5-mm VQFN package

The ADS125H02 is a ±20-V input, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The ADC features a low-noise programmable gain amplifier (PGA), an internal reference, clock oscillator, and signal or reference out-of-range monitors.

The integration of a wide input range, ±18-V PGA and an ADC into a single package reduces board area up to 50% compared to discrete solutions.

Programmable gain of 0.125 to 128 (corresponding to an equivalent input range from ±20 V to ±20 mV) eliminates the need for an external attenuator or external gain stages. 1-GΩ minimum input impedance reduces error caused by sensor loading. Additionally, the low noise and low drift performance allow direct connections to bridge, resistance temperature detector (RTD), and thermocouple sensors.

The digital filter attenuates 50-Hz and 60-Hz line cycle noise for data rates ≤ 50 SPS or 60 SPS to reduce measurement error. The filter also provides no-latency conversion data for high data throughput during channel sequencing.

The ADS125H02 is housed in a 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +125°C temperature range.

The ADS125H02 is a ±20-V input, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The ADC features a low-noise programmable gain amplifier (PGA), an internal reference, clock oscillator, and signal or reference out-of-range monitors.

The integration of a wide input range, ±18-V PGA and an ADC into a single package reduces board area up to 50% compared to discrete solutions.

Programmable gain of 0.125 to 128 (corresponding to an equivalent input range from ±20 V to ±20 mV) eliminates the need for an external attenuator or external gain stages. 1-GΩ minimum input impedance reduces error caused by sensor loading. Additionally, the low noise and low drift performance allow direct connections to bridge, resistance temperature detector (RTD), and thermocouple sensors.

The digital filter attenuates 50-Hz and 60-Hz line cycle noise for data rates ≤ 50 SPS or 60 SPS to reduce measurement error. The filter also provides no-latency conversion data for high data throughput during channel sequencing.

The ADS125H02 is housed in a 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +125°C temperature range.
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技術文件

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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 ADS125H02 ±20-V Input, 2-Channel, 40-kSPS, 24-Bit, Delta-Sigma ADC With PGA and Voltage Reference datasheet (Rev. C) PDF | HTML 2019/6/17
應用說明 A Simple, Java-Based CRC Calculator PDF | HTML 2026/3/4
Circuit design 來自 +5V 供電電源且用於高電壓資料轉換器的精密、±15V 電 源供應電路 PDF | HTML Download English Version PDF | HTML 2025/12/9
應用說明 K-type thermocouple measurement circuit with precision ADC (Rev. A) PDF | HTML 2024/9/20
Circuit design 4-Ch, diff. in., DAQ front-end circuit w/ configurable voltage & current inputs (Rev. A) PDF | HTML 2024/9/19
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 A Basic Guide to RTD Measurements (Rev. A) PDF | HTML 2023/3/29
應用說明 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
應用說明 A Basic Guide to Thermocouple Measurements (Rev. A) PDF | HTML 2023/3/29
Product overview PLC Analog Input Front-End Architectures PDF | HTML 2022/7/31
應用說明 ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 2021/9/9
應用說明 Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 2021/8/23
應用說明 RTD Wire-Break Detection Using Precision Delta-Sigma ADCs PDF | HTML 2021/2/18
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19
Application brief Simplified ±10 V Analog Input Module Using the ADS125H02 2019/5/8

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

ADS125H02EVM — ADS125H02 評估模組

ADS125H02 評估模組 (EVM) 是用於評估 ADS125H02 類比轉數位轉換器 (ADC) 的平台。ADS125H02 是一款寬輸入範圍、24 位元、19.2 kSPS 的三角積分 (ΔΣ) ADC，它整合 PGA、電壓參考和內部故障監測器。差動輸入電壓範圍從 ±20mV 至 ±15.5V。這款感測器就緒的 ADC 為最嚴苛的量測應用，包括磅秤、應變計感測器、熱電偶和電阻溫度偵測器 (RTD)，提供高精確度、單晶片量測解決方案。

ADS125H02EVM 及 ΔΣ ADC 評估軟體 (DELTASIGMAEVAL-GUI) 皆可減少原型開發時間，讓您的產品更快上市。

使用指南: PDF
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支援軟體

ADS125H02-C-EXAMPLE-CODE — ADS125H02 example C code

Expedite your embedded design using this example C code for the ADS125H02
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模擬型號

ADS125H0X IBIS Model

SBAM384.ZIP (65 KB) - IBIS 模型
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計算工具

ADC-RTD-CONFIG-CALC — RTD Configuration Calculator for Precision ADCs

此電阻溫度偵測器 (RTD) 配置計算機是一套 Microsoft® Excel 工具，可協助使用者為 RTD 應用找出系統解決方案。預設顯示兩線、三線及四線 RTD 配置，並配備適用三線 RTD 的高側或低側參考電阻，及一或兩個整合式數位轉類比轉換器 (IDAC) 電流來源的選項。

此外，計算機支援各種 RTD 類型和精確類比轉數位轉換器 (ADC)。使用此計算器為每個組態選擇參考及偏壓電阻值、IDAC 電流及增益設定。此外，計算機也提供全誤差的一階近似，以幫助使用者找出系統中最大的誤差來源。

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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

SBAC234 — ADS125H02 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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封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RHB) 32 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

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