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Precision, Fast Sample-Rate, Digital Current-Sense Amplifier

Up to 1Msps Digital Current-Sense Amplifier with Smart Modes to Save Power and Simplify MCU firmware

产品详情

主要特征

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10mV or 50mV
VOS @25°C (µV) (max) 20
Output Format Digital
CMVR (V) (min) 0
CMVR (V) (max) 36
VCC (V) (min) 1.71
VCC (V) (max) 1.98
ICC (µA) (typ) 2700
Bi-Dir. Curr. Sense Yes
Gain Selectable (25V/V or 125V/V)
Gain Accuracy @25°C (%) (max) 0.55
Oper. Temp. (°C) -40 to +125
Package/Pins THIN WLP/12
Budgetary
Price (See Notes)
1.11
缩小

简化框图

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com

参量

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10mV or 50mV
VOS @25°C (µV) (max) 20
Output Format Digital
CMVR (V) (min) 0
CMVR (V) (max) 36
VCC (V) (min) 1.71
VCC (V) (max) 1.98
ICC (µA) (typ) 2700
Bi-Dir. Curr. Sense Yes
Gain Selectable (25V/V or 125V/V)
Gain Accuracy @25°C (%) (max) 0.55
Oper. Temp. (°C) -40 to +125
Package/Pins THIN WLP/12
Budgetary
Price (See Notes)
1.11

主要特征

  • Programmable Sample Rate up to 1Msps
  • Wide Input Common-Mode range from -0.1V (ground sensing) to 36V
  • Programmable Input Sense Range (±10mV and ±50mV)
  • Very low 5μV Input Offset Voltage allows using a small sense resistor
  • I2C compliant and SMBus compatible interface with smart modes to save power:
    • Wake-up current threshold
    • Low 4 measurements/s rate
    • Auto-shutdown when I2C is inactive
  • Bi-directional current sensing
  • Common-Mode Voltage monitoring up to 36V
  • Space-saving 12-bump WLP (0.4mm pitch) and 12-pin TDFN
  • Peak current Log
  • Programmable over-current/voltage thresholds and under-voltage threshold
  • Alert output with programmable response time
  • 64-cell deep FIFO

应用/用途

  • Base-Station PA Control
  • Battery Operated Devices
  • Industrial Control and Automation
  • Server Backplanes
  • Telecom Equipment

描述

The MAX40080 is a high-precision, fast-response, bi-directional current-sense amplifier with digital output and a very wide input common-mode range from -0.1V (ground sensing) to 36V.

The device features an ultra-low 5μV input offset voltage and a very low 0.2% gain error. The low input offset voltage is especially important because it allows using a small sense resistor, thus saving power dissipation, but at the same time not compromising the measurement accuracy. The device also features a programmable input sensing range between ±10mV and ±50mV (or programmable input gain between 125V/V and 25V/V) which is very useful to enhance accuracy at low current.

The device includes an analog-to-digital converter with a programmable sample rate and 12-bit resolution (13-bit including sign bit for current measurement) and features an I2C compliant and SMBus compatible interface.

The device features a wake-up current threshold and auto-shutdown mode when the I2C is inactive. Both these features are designed to minimize power consumption.

The device is available in a small 12-pin WLP (and also a 12-pin TDFN) and is specified over the -40°C to +125°C extended operating temperature range.

简化框图

MAX40080: Block Diagram MAX40080: Block Diagram Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com