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類比轉數位轉換器 (ADC)
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ADS1232

現行

適用於橋接器感測器的 24 位元、80SPS、2 通道（差分）、針腳可編程 ΔΣ ADC

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產品規格表

ADS1232

現行
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產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 0.08 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Oscillator, PGA Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 4.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.3 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.3
Resolution (Bits) 24 Sample rate (max) (ksps) 0.08 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Oscillator, PGA Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 4.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.3 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.3
TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm)
  • Complete front-end for bridge sensors
  • 23.5-bits effective resolution at gain = 1
  • 19.2-bits noise-free resolution at gain = 64
  • Low-noise PGA
  • Selectable gains of 1, 2, 64, and 128
  • RMS noise:
    • 17nV at 10SPS at gain = 128
    • 44nV at 80SPS at gain = 128
  • 100dB simultaneous 50Hz and 60Hz rejection
  • Flexible clocking:
    • Low-drift internal oscillator
    • Optional external crystal
  • Selectable 10SPS or 80SPS data rates
  • Easy ratiometric measurements:
    • External voltage reference up to 5V
  • Two-channel differential input with internal temperature sensor (ADS1232)
  • Four-channel differential input (ADS1234)
  • Two-wire serial interface
  • Supply voltage range: 2.7V to 5.3V
  • Temperature range: –40°C to +105°C
  • Packages: TSSOP-24 (ADS1232) or TSSOP-28 (ADS1234)
  • Complete front-end for bridge sensors
  • 23.5-bits effective resolution at gain = 1
  • 19.2-bits noise-free resolution at gain = 64
  • Low-noise PGA
  • Selectable gains of 1, 2, 64, and 128
  • RMS noise:
    • 17nV at 10SPS at gain = 128
    • 44nV at 80SPS at gain = 128
  • 100dB simultaneous 50Hz and 60Hz rejection
  • Flexible clocking:
    • Low-drift internal oscillator
    • Optional external crystal
  • Selectable 10SPS or 80SPS data rates
  • Easy ratiometric measurements:
    • External voltage reference up to 5V
  • Two-channel differential input with internal temperature sensor (ADS1232)
  • Four-channel differential input (ADS1234)
  • Two-wire serial interface
  • Supply voltage range: 2.7V to 5.3V
  • Temperature range: –40°C to +105°C
  • Packages: TSSOP-24 (ADS1232) or TSSOP-28 (ADS1234)

The ADS1232 and ADS1234 (ADS123x) are precision, 24-bit, analog-to-digital converters (ADCs). With a low-noise programmable gain amplifier (PGA), a precision delta-sigma ADC, and internal oscillator. The ADS123x provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and pressure sensors.

An input multiplexer (MUX) accepts either two (ADS1232) or four (ADS1234) differential inputs. The ADS1232 also includes a temperature sensor to monitor ambient temperature. The low-noise PGA has a selectable gain of 1, 2, 64, or 128, supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV.

The delta-sigma ADC provides a maximum of 23.5-bits effective resolution, and supports two data rates: 10SPS (providing 50Hz and 60Hz rejection) and 80SPS. The ADS123x can be clocked externally using an oscillator or a crystal, or by the internal oscillator.

Offset calibration is performed on-demand, and the ADS123x can be put in a low-power standby mode or shut off completely in power-down mode. The ADS123x are operated through simple pin-driven control—there are no digital registers to program.

Data are output over a two-wire serial interface that connects directly to the MSP430 and other microcontrollers.

The ADS1232 and ADS1234 (ADS123x) are precision, 24-bit, analog-to-digital converters (ADCs). With a low-noise programmable gain amplifier (PGA), a precision delta-sigma ADC, and internal oscillator. The ADS123x provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and pressure sensors.

An input multiplexer (MUX) accepts either two (ADS1232) or four (ADS1234) differential inputs. The ADS1232 also includes a temperature sensor to monitor ambient temperature. The low-noise PGA has a selectable gain of 1, 2, 64, or 128, supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV.

The delta-sigma ADC provides a maximum of 23.5-bits effective resolution, and supports two data rates: 10SPS (providing 50Hz and 60Hz rejection) and 80SPS. The ADS123x can be clocked externally using an oscillator or a crystal, or by the internal oscillator.

Offset calibration is performed on-demand, and the ADS123x can be put in a low-power standby mode or shut off completely in power-down mode. The ADS123x are operated through simple pin-driven control—there are no digital registers to program.

Data are output over a two-wire serial interface that connects directly to the MSP430 and other microcontrollers.
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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 ADS123x 2- and 4-Channel, 24-Bit, Delta-Sigma ADCs for Bridge Sensors datasheet (Rev. H) PDF | HTML 2025/6/2
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
電子書 Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020/6/19
電子書 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015/3/19
應用說明 Delta-Sigma ADC Design for Bridge Sensor Applications 2011/9/30
使用指南 ADS1232REF User's Guide (Rev. B) 2011/7/14
白皮書 Complete Front End Solutions for Weigh Scales 2007/6/14

設計與開發

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開發板

ADS1232REF — ADS1232 評估模組

ADS1232REF 為一塊電路板，設計用以搭載 ADS1232 24 位元 ΔΣ 高精度、低雜訊類比至數位轉換器。該開發板包含秤重數位器所需的完整電路與使用者介面。適用於對 ADS1232 裝置進行一般性評估。該開發板由 +5VDC 與 +3.3VDC 供電，這些電源由板上兩個穩壓器 U1 與 U2 產生。採用微控制器 MSP430F449，提供操作 LCD 控制器、硬體 SPI™ 與 UART 介面所需的記憶體，並具備一個乘法器，用以執行多項韌體乘法運算。

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模擬型號

ADS1232 IBIS Model

SBAM112.ZIP (33 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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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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TSSOP (PW) 24 Ultra Librarian
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