产品详情

Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode Internal Input voltage range (max) (V) 3.6 Input voltage range (min) (V) -1.3 Features PGA, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 3.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode Internal Input voltage range (max) (V) 3.6 Input voltage range (min) (V) -1.3 Features PGA, Small Size Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 3.3 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
WQFN (RUK) 20 9 mm² (3 mm × 3 mm) TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • 4 simultaneously sampling differential inputs
  • Programmable data rate up to 64 kSPS
  • Programmable gain up to 128
  • Noise performance:
    • 102-dB dynamic range at gain = 1, 4 kSPS
    • 80-dB dynamic range at gain = 64, 4 kSPS
  • Total harmonic distortion: –100 dB
  • High-impedance inputs for direct sensor connection:
    • Input impedance 330-kΩ for gains of 1, 2, and 4
    • Input impedance ≥ 1-MΩ for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • 244-ns resolution, 8.192-MHz fCLKIN
  • Current-detect mode allows for extremely low power tamper detection
  • Fast startup: first data within 0.5 ms of supply ramp
  • Integrated negative charge pump allows input signals below ground
  • Crosstalk between channels: –120 dB
  • Low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7-V to 3.6-V analog and digital supplies
  • Low power consumption: 3.3 mW at 3-V AVDD and DVDD
  • Packages: 20-pin TSSOP or 20-pin WQFN
  • Operating temperature range: –40°C to +125°C
  • 4 simultaneously sampling differential inputs
  • Programmable data rate up to 64 kSPS
  • Programmable gain up to 128
  • Noise performance:
    • 102-dB dynamic range at gain = 1, 4 kSPS
    • 80-dB dynamic range at gain = 64, 4 kSPS
  • Total harmonic distortion: –100 dB
  • High-impedance inputs for direct sensor connection:
    • Input impedance 330-kΩ for gains of 1, 2, and 4
    • Input impedance ≥ 1-MΩ for gains of 8, 16, 32, 64, and 128
  • Programmable channel-to-channel phase delay calibration:
    • 244-ns resolution, 8.192-MHz fCLKIN
  • Current-detect mode allows for extremely low power tamper detection
  • Fast startup: first data within 0.5 ms of supply ramp
  • Integrated negative charge pump allows input signals below ground
  • Crosstalk between channels: –120 dB
  • Low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7-V to 3.6-V analog and digital supplies
  • Low power consumption: 3.3 mW at 3-V AVDD and DVDD
  • Packages: 20-pin TSSOP or 20-pin WQFN
  • Operating temperature range: –40°C to +125°C

The ADS131M04 is a four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer, shunt, or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Optional cyclic redundancy checks (CRCs) on the data input, data output, and register map maintain communication integrity.

The complete analog front-end (AFE) is offered in a 20-pin TSSOP package or a leadless 20-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.

The ADS131M04 is a four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer, shunt, or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Optional cyclic redundancy checks (CRCs) on the data input, data output, and register map maintain communication integrity.

The complete analog front-end (AFE) is offered in a 20-pin TSSOP package or a leadless 20-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.

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设计与开发

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评估板

ADS131M04EVM — 汽车类四通道、24 位、64kSPS、同步采样 Δ-Σ ADC

ADS131M04 评估模块 (EVM) 是一种用于评估 ADS131M04 的平台,后者是一款低功耗同步采样的 Δ-Σ 模数转换器 (ADC)。

ADS131M04EVM 套件包括 ADS131M04EVM 板和支持随附软件的精密主机接口 (PHI) 控制器板。

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应用软件和框架

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ADC 能量计量库软件包使用高性能多通道模数转换器 (ADC) 实现了各种计量参数,通常用于测量电表、配电单元 (PDU) 和断路器的能量。

该 ADC 对通道在高达 8kHz 时的输出进行采样,以测量主交流电源各分支的电流和电压。该软件库在宽输入电流范围(0.05A 至 100A)内能达到很高的精度,在必要时还支持高采样频率,以实现独立谐波分析等高级电能质量功能。与集成片上系统 (SoC) 和应用特定的专用产品相比,通过使用独立 ADC 对电流传感器输出进行采样,可以让设计人员更加灵活地选择计量微控制器。

该软件包含硬件抽象层,以实现 ADC 和 Arm® Cortex® 之间的通信,而 (...)

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支持软件

ADS131M08-C-EXAMPLE-CODE — ADS131M08 example C code

Expedite your embedded design using this example C code for the ADS131M08 product family
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支持软件

SBAC257 — ADS131M04EVM GUI 安装程序

Evaluate the ADS131M04 using the evaluation module (EVM) and graphical user interface (GUI) software
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仿真模型

ADS131M02/03/04 IBIS model (Rev. A)

SBAM423A.IBS (314 KB) - IBIS 模型
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计算工具

ADC-DESIGN-CALC — Online design calculator tool for TI Precision ADCs

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除了可用作独立工具之外,该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

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参考设计

TIDA-010036 — 使用独立 ADC 的单相并联电表参考设计

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参考设计

TIDA-010037 — 使用独立 ADC 的高精度分相 CT 电量计参考设计

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封装 引脚 CAD 符号、封装和 3D 模型
WQFN (RUK) 20 Ultra Librarian
TSSOP (PW) 20 Ultra Librarian

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