EMC1701-1

The EMC1701 is a combination high-side current sensing device with precision temperature measurement. It measures the voltage developed across an external sense resistor to represent the high-side current of a battery or voltage regulator. The EMC1701 also measures the bus voltage and uses these measured values to present a proportional power calculation. The EMC1701 contains additional bi-directional peak detection circuitry to flag instantaneous current spikes with programmable time duration and magnitude threshold. Finally, the EMC1701 includes an internal diode channel for ambient temperature measurement.

Both current sensing and temperature monitoring include two tiers of protection: one that can be masked and causes the ALERT# pin to be asserted, and the other that cannot be masked and causes the THERM# pin to be asserted.

Features
  • High-side current sensor Bi-directional current measurement Measures bus voltage 1% current measurement accuracy Integrated over 82ms to 2.6sec with 11-bit resolution 3V to 24V voltage bus voltage range
  • Bi-directional current measurement
  • Measures bus voltage
  • 1% current measurement accuracy
  • Integrated over 82ms to 2.6sec with 11-bit resolution
  • 3V to 24V voltage bus voltage range
  • Calculates proportional power
  • Independent hardware set instantaneous current peak detector (EMC1701-1 only) Software controls to program time duration and magnitude threshold
  • Software controls to program time duration and magnitude threshold
  • Power supply options Bus or separately powered for low voltage operation
  • Bus or separately powered for low voltage operation
  • Wide temperature operating range: -40°C to +85°C
  • Internal temperature monitor ±1°C accuracy (-5°C < TA < 85°C)
  • ±1°C accuracy (-5°C < TA < 85°C)
  • ALERT# and THERM# outputs for temperature, voltage, and out-of-current limit reporting
  • I2C/SMBus 2.0 interface Pin-selectable SMBus Address Block Read and Write
  • Pin-selectable SMBus Address
  • Block Read and Write
  • Available in a 12-pin 4mm x 4mm QFN RoHS Compliant Package (EMC1701-1)
  • Available in a 10-pin MSOP RoHS Compliant Package (EMC1701-2)
  • Notebook and Desktop Computers
  • Industrial
  • Power Management Systems
  • Embedded Applications
Parameter
Parameter Name Value Value
# Current Sensors 1 1
Description Current/DC Power Sensor with Temperature Monitoring Current/DC Power Sensor with Temperature Monitoring
Full Scale Range (mV) 10, 20, 40, 80 10, 20, 40, 80
Current Measuerment Max Accr (%) ±1 ±1
Effective Sampling Interval min to max (msec) 2.5 to 2600 2.5 to 2600
Bus Voltage Range (V) +3 to +24 +3 to +24
# Temperature Monitors (ambient, remote) 1, 0 1, 0
Temperature Accuracy Typ / Max (°C) ±0.25 / ±1.0 ±0.25 / ±1.0
Alert/Therm 2 2
Peak Detection Hardware Hardware
Interface SMBus/I2C SMBus/I2C
Address Select yes yes
Documents
EMC1701 High-Side Current-Sense and Internal 1??C Temperature Monitor Data SheetData Sheets09/27/2010816KB
AN18.15 - PCB Design Guidelines for QFN and DQFN PackagesAppNote10/16/2014205KB
EMC1701 High-Side Current-Sense and Internal 1??C Temperature Monitor Data BriefProduct Briefs09/27/2010298KB
EMC1701 Reference Design Part Library, Microsoft Object Library FileSchematics09/28/200911KB
EMC1701 Reference Design Schematic, PDFSchematics10/02/200920KB
Similar Devices
ProductDescriptionFull Scale Range (mV)Bus Voltage Range (V)Price5K
EMC1701-1Current/DC Power Sensor with Temperature Monitoring10, 20, 40, 80+3 to +24
EMC1701-2Current/DC Power Sensor with Temperature Monitoring10, 20, 40, 80+3 to +24$1.12
EMC1702-1Current/DC Power Sensor with Temperature Monitoring10, 20, 40, 80+3 to +24$1.12
EMC1704-1Current/DC Power Sensor with Temperature Monitoring10, 20, 40, 80+3 to +24
EMC1704-2Current/DC Power Sensor with Temperature Monitoring10, 20, 40, 80+3 to +24$2.02
PAC1710Current/DC Power Sensor10, 20, 40, 800 to +40$0.67
PAC1720Dual Current/DC Power Sensor10, 20, 40, 800 to +40$1.18
PAC1921Current/DC Power Sensor1000 to +32$1.18
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
EMC1701-1-KP-TR0.0254000.13939412QFN4x4x0.9mmMatte Tine3
EMC1701 High-Side Current-Sense and Internal 1??C Temperature Monitor Data Sheet EMC1701-2
AN18.15 LAN9220
EMC1701 High-Side Current-Sense and Internal 1??C Temperature Monitor Data Brief EMC1701-2
EMC1701 Reference Design Schematic, PDF EMC1701-2