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ADS1222

現行

具有 2 通道差分輸入多工器的 24 位元 ADC

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ADS1222

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 0.24 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 1.35 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
Resolution (Bits) 24 Sample rate (max) (ksps) 0.24 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 1.35 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
TSSOP (PW) 14 32 mm² (5 mm × 6.4 mm)
  • 240SPS Data Rate with 4MHz Clock
  • 20-Bit Effective Resolution
  • Input Multiplexer with Two Differential Channels
  • Pin-Selectable, High-Impedance Input Buffer
  • ±5V Differential Input Range
  • 0.0003% INL (typ), 0.0015% INL (max)
  • Self-Calibrating
  • Simple 2-Wire Serial Interface
  • On-Chip Temperature Sensor
  • Single Conversions with Standby Mode
  • Low Current Consumption: 300µA
  • Analog Supply: 2.7V to 5.5V
  • APPLICATIONS
    • Hand-Held Instrumentation
    • Portable Medical Equipment
    • Industrial Process Control
    • Weigh Scales

All trademarks are the property of their respective owners.
  • 240SPS Data Rate with 4MHz Clock
  • 20-Bit Effective Resolution
  • Input Multiplexer with Two Differential Channels
  • Pin-Selectable, High-Impedance Input Buffer
  • ±5V Differential Input Range
  • 0.0003% INL (typ), 0.0015% INL (max)
  • Self-Calibrating
  • Simple 2-Wire Serial Interface
  • On-Chip Temperature Sensor
  • Single Conversions with Standby Mode
  • Low Current Consumption: 300µA
  • Analog Supply: 2.7V to 5.5V
  • APPLICATIONS
    • Hand-Held Instrumentation
    • Portable Medical Equipment
    • Industrial Process Control
    • Weigh Scales

All trademarks are the property of their respective owners.

The ADS1222 is a 2-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter. It offers excellent performance and low power in a TSSOP-14 package. The ADS1222 is well-suited for demanding, high-resolution measurements, especially in portable systems and other space-saving and power-constrained applications.

A delta-sigma (ΔΣ) modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (mux) is used to select between two separate differential input channels. A buffer can be selected to increase the input impedance of the measurement.

A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1222 can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1222s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1222 is designed to easily connect to microcontrollers, such as the MSP430.

The ADS1222 supports 2.7V to 5.5V supplies. Power is typically less than 1mW in 3V operation and less than 1µW during Standby mode.

The ADS1222 is a 2-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter. It offers excellent performance and low power in a TSSOP-14 package. The ADS1222 is well-suited for demanding, high-resolution measurements, especially in portable systems and other space-saving and power-constrained applications.

A delta-sigma (ΔΣ) modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (mux) is used to select between two separate differential input channels. A buffer can be selected to increase the input impedance of the measurement.

A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1222 can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1222s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1222 is designed to easily connect to microcontrollers, such as the MSP430.

The ADS1222 supports 2.7V to 5.5V supplies. Power is typically less than 1mW in 3V operation and less than 1µW during Standby mode.
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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 ADS1222: 24-Bit A/D Conv with 2-Channel Differential Input Multiplexer datasheet (Rev. B) 2008/12/10
應用說明 Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023/3/29
電子書 Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015/3/19

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模擬型號

ADS1222 IBIS Model

SBAM116.ZIP (30 KB) - IBIS 模型
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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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