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類比轉數位轉換器 (ADC)
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ADS1271

現行

適用於寬頻應用的 24 位元、105kSPS、1 通道 Delta-Sigma ADC

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產品規格表

ADS1271

現行
產品規格表 立即訂購

產品詳細資料

Resolution (Bits) 24 Sample rate (max) (ksps) 105 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable, Wideband Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 92 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 109 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 105 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features Daisy-Chainable, Wideband Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 92 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 109 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
TSSOP (PW) 16 32 mm² 5 x 6.4
  • 105kSPS Data Rate
  • AC Performance:
    51kHz Bandwidth
    109dB SNR (High-Resolution Mode)
    –108dB THD
  • DC Accuracy:
    1.8µV/°C Offset Drift
    2ppm/°C Gain Drift
  • Selectable Operating Modes:
    High-Speed: 105kSPS Data Rate
    High-Resolution: 109dB SNR
    Low-Power: 35mW Dissipation
  • Power-Down Control
  • Digital Filter:
    Linear Phase Response
    Passband Ripple: ±0.005dB
    Stop Band Attenuation: 100dB
  • Internal Offset Calibration On Command
  • Selectable SPI&™ or Frame Sync Serial Interface
  • Designed for Multichannel Systems:
    Daisy-Chainable Serial Interface
    Easy Synchronization
  • Simple Pin-Driven Control
  • Modulator Output Option
  • Specified from –40°C to +105°C
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Vibration/Modal Analysis
    • Acoustics
    • Dynamic Strain Gauges
    • Pressure Sensors
    • Test and Measurement

SPI is a trademark of Motorola Inc. All other trademarks are the property of their respective owners.
  • 105kSPS Data Rate
  • AC Performance:
    51kHz Bandwidth
    109dB SNR (High-Resolution Mode)
    –108dB THD
  • DC Accuracy:
    1.8µV/°C Offset Drift
    2ppm/°C Gain Drift
  • Selectable Operating Modes:
    High-Speed: 105kSPS Data Rate
    High-Resolution: 109dB SNR
    Low-Power: 35mW Dissipation
  • Power-Down Control
  • Digital Filter:
    Linear Phase Response
    Passband Ripple: ±0.005dB
    Stop Band Attenuation: 100dB
  • Internal Offset Calibration On Command
  • Selectable SPI&™ or Frame Sync Serial Interface
  • Designed for Multichannel Systems:
    Daisy-Chainable Serial Interface
    Easy Synchronization
  • Simple Pin-Driven Control
  • Modulator Output Option
  • Specified from –40°C to +105°C
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.3V
  • APPLICATIONS
    • Vibration/Modal Analysis
    • Acoustics
    • Dynamic Strain Gauges
    • Pressure Sensors
    • Test and Measurement

SPI is a trademark of Motorola Inc. All other trademarks are the property of their respective owners.

The ADS1271 is a 24-bit, delta-sigma analog-to-digital converter (ADC) with a data rate up to 105kSPS. It offers a unique combination of excellent DC accuracy and outstanding AC performance. The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. The ADS1271 provides a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.

Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for DC measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specification are significantly weaker than their industrial counterparts. The ADS1271 combines these converters, allowing high-precision industrial measurement with excellent DC and AC specifications ensured over an extended industrial temperature range.

Three operating modes allow for optimization of speed, resolution, and power. A selectable SPI or a frame-sync serial interface provides for convenient interfacing to microcontrollers or DSPs. The output from the modulator is accessible for external digital filter applications. All operations, including internal offset calibration, are controlled directly by pins; there are no registers to program.

The ADS1271 is a 24-bit, delta-sigma analog-to-digital converter (ADC) with a data rate up to 105kSPS. It offers a unique combination of excellent DC accuracy and outstanding AC performance. The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. The ADS1271 provides a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.

Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop. As a result, they have limited signal bandwidth and are mostly suited for DC measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specification are significantly weaker than their industrial counterparts. The ADS1271 combines these converters, allowing high-precision industrial measurement with excellent DC and AC specifications ensured over an extended industrial temperature range.

Three operating modes allow for optimization of speed, resolution, and power. A selectable SPI or a frame-sync serial interface provides for convenient interfacing to microcontrollers or DSPs. The output from the modulator is accessible for external digital filter applications. All operations, including internal offset calibration, are controlled directly by pins; there are no registers to program.
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重要文件 類型 標題 格式選項 日期
* Data sheet 24-Bit, Wide Bandwidth Analog-to-Digital Converter datasheet (Rev. F) 2007年 10月 23日
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 2023年 3月 29日
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 2020年 6月 19日
White paper Voltage-reference impact on total harmonic distortion 2016年 8月 1日
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 2015年 3月 19日
Application note Synchronizing the ADS1271 2005年 10月 27日

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使用指南: PDF
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ADS1271-EXCEL-CALC-TOOL — ADS1271 Design Calculator

    The ADS1271 Excel calculator tool provides the user with several easy-to-use tools to simplify the configuration of the ADS1271. The tool helps the user understand the different settings and operating modes that aid in optimizing a design with the ADS1271 wide-bandwidth analog-to-digital converter (...)
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ADS1271 IBIS Model

SBAM115.ZIP (104 KB) - IBIS Model
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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 (...)

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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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PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

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