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數位電源監測器

LMP92064

現行

2V、12 位元、快速同時取樣 SPI 輸出電流/電壓監控器

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產品規格表

LMP92064

現行
產品規格表 立即訂購

產品詳細資料

Common-mode voltage (max) (V) 2 Common-mode voltage (min) (V) -0.2 Digital interface SPI Resolution (Bits) 12 Input offset (±) (max) (µV) 32 Input offset drift (±) (max) (µV/°C) 0.28 Input offset drift (±) (typ) (µV/°C) 0.28 Voltage gain (V/V) 25 CMRR (min) (dB) 110 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 4.5 Iq (max) (mA) 13 Gain error (%) 0.5, 0.75 Gain error drift (±) (max) (ppm/°C) 25 Features Low-side Capable Number of channels 1 Power measurement accuracy (%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 105
Common-mode voltage (max) (V) 2 Common-mode voltage (min) (V) -0.2 Digital interface SPI Resolution (Bits) 12 Input offset (±) (max) (µV) 32 Input offset drift (±) (max) (µV/°C) 0.28 Input offset drift (±) (typ) (µV/°C) 0.28 Voltage gain (V/V) 25 CMRR (min) (dB) 110 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 4.5 Iq (max) (mA) 13 Gain error (%) 0.5, 0.75 Gain error drift (±) (max) (ppm/°C) 25 Features Low-side Capable Number of channels 1 Power measurement accuracy (%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 105
WSON (NHR) 16 20 mm² 5 x 4
  • Two Simultaneous Sampling 12-Bit ADCs
    • Conversion Rate: 125 kSps (Minimum)
  • 12-Bit Current Sense Channel
    • Input-referred Offset: ±15 µV
    • Common-mode Voltage Range: –0.2 V to 2 V
    • Maximum Differential Input Voltage: 75 mV
    • Fixed Gain: 25 V/V
    • Gain Error: ±0.75% (Maximum)
    • Bandwidth (–3dB): 70 kHz
    • DC PSRR: 100 dB
    • DC CMRR: 110 dB
  • 12-Bit Voltage Channel
    • INL: ±1 LSB
    • Offset Error: ±2 mV (Maximum)
    • Gain Error: ±0.75% (Maximum)
    • Maximum Input Voltage: 2.048 V
    • Bandwidth: 100 kHz
  • Internal Reference
  • SPI Frequency: Up to 20 MHz
  • Temperature Range: –40°C to 105°C
  • 16-Pin WSON Package
  • Two Simultaneous Sampling 12-Bit ADCs
    • Conversion Rate: 125 kSps (Minimum)
  • 12-Bit Current Sense Channel
    • Input-referred Offset: ±15 µV
    • Common-mode Voltage Range: –0.2 V to 2 V
    • Maximum Differential Input Voltage: 75 mV
    • Fixed Gain: 25 V/V
    • Gain Error: ±0.75% (Maximum)
    • Bandwidth (–3dB): 70 kHz
    • DC PSRR: 100 dB
    • DC CMRR: 110 dB
  • 12-Bit Voltage Channel
    • INL: ±1 LSB
    • Offset Error: ±2 mV (Maximum)
    • Gain Error: ±0.75% (Maximum)
    • Maximum Input Voltage: 2.048 V
    • Bandwidth: 100 kHz
  • Internal Reference
  • SPI Frequency: Up to 20 MHz
  • Temperature Range: –40°C to 105°C
  • 16-Pin WSON Package

The LMP92064 is a precision low-side digital current sensor and voltage monitor with a digital SPI interface. This analog frontend (AFE) includes a precision current sense amplifier to measure a load current across a shunt resistor and a buffered voltage channel to measure the voltage supply of the load. The current and voltage channels are sampled simultaneously by independent 125-kSps, 12-bit ADC converters, allowing for very accurate power calculations in unidirectional sensing applications.

The LMP92064 includes an internal 2.048-V reference for the ADCs, eliminating the need of an external reference and reducing component count and board space.

A host can communicate with the LMP92064 using a four-wire SPI interface running at speeds of up to 20 MHz. The fast SPI interface lets the user take advantage of the higher bandwidth ADC to capture fast varying signals. The four-wire interface with dedicated unidirectional input and output lines also allows for an easy interface to digital isolators in applications where isolation is required.

The LMP92064 operates from a single 4.5-V to 5.5-V supply and includes a separate digital supply pin. The LMP92064 is specified over a temperature range of –40°C to 105°C, and is available in a 5-mm × 4-mm 16-Pin WSON package.

The LMP92064 is a precision low-side digital current sensor and voltage monitor with a digital SPI interface. This analog frontend (AFE) includes a precision current sense amplifier to measure a load current across a shunt resistor and a buffered voltage channel to measure the voltage supply of the load. The current and voltage channels are sampled simultaneously by independent 125-kSps, 12-bit ADC converters, allowing for very accurate power calculations in unidirectional sensing applications.

The LMP92064 includes an internal 2.048-V reference for the ADCs, eliminating the need of an external reference and reducing component count and board space.

A host can communicate with the LMP92064 using a four-wire SPI interface running at speeds of up to 20 MHz. The fast SPI interface lets the user take advantage of the higher bandwidth ADC to capture fast varying signals. The four-wire interface with dedicated unidirectional input and output lines also allows for an easy interface to digital isolators in applications where isolation is required.

The LMP92064 operates from a single 4.5-V to 5.5-V supply and includes a separate digital supply pin. The LMP92064 is specified over a temperature range of –40°C to 105°C, and is available in a 5-mm × 4-mm 16-Pin WSON package.
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重要文件 類型 標題 格式選項 日期
* Data sheet LMP92064 Precision Low-Side, 125-kSps Simultaneous Sampling, Current Sensor and Voltage Monitor With SPI datasheet (Rev. A) PDF | HTML 2014年 12月 29日
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 2022年 1月 25日

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韌體

SNOC016 — BOOST-LMP92064EVM Launchpad Firmware

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LMP92064 IBIS Model

SNOM458.ZIP (24 KB) - IBIS Model
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計算工具

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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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。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

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TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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