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ZXCT1009

High Side Current Sense Monitor

The ZXCT1009 is a high side current sense monitor from Diodes Incorporated. View the full ZXCT1009 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Official ZXCT1009 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Diodes Incorporated

Category

Integrated Circuits

Package

SOT23, SM8

ZXCT1009 Key Specifications

ParameterValue
Accuracy±1%
Output Current9.98mA
FunctionCurrent Monitor
Mounting TypeSurface Mount
Operating Temperature-40°C ~ 85°C
Package / CaseTO-236-3, SC-59, SOT-23-3
Sensing MethodHigh-Side
Supplier Device PackageSOT-23-3
Input Voltage Range2.5V ~ 20V

ZXCT1009 Overview

Part: ZXCT1009 — Diodes Incorporated

Type: High-Side Current Monitor

Description: The ZXCT1009 is a high-side current sense monitor that translates a voltage developed across a current shunt resistor into a proportional output current, featuring a wide input voltage range of 2.5V to 20V and a low quiescent current of 4 μA.

Operating Conditions:

  • Supply voltage: 2.5–20 V
  • Operating temperature: -40 to 85 °C
  • Sense voltage: 0 to 2500 mV

Absolute Maximum Ratings:

  • Max supply voltage: 20 V (on any pin relative to I_OUT)
  • Max continuous current: 25 mA (I_OUT)
  • Max junction/storage temperature: 125 °C

Key Specs:

  • Quiescent current: 4 μA (Typ, V_SENSE = 0V)
  • Accuracy: -2.5 to 2.5 % (R_SENSE = 0.1 Ω, V_SENSE = 200mV)
  • Transconductance: 10000 μA/V (Typ, I_OUT/V_SENSE)
  • Bandwidth: 300 kHz (Typ, V_SENSE(DC) = 10mV)
  • Bandwidth: 2 MHz (Typ, V_SENSE(DC) = 100mV)
  • V_SENSE- Input Current: 100 nA (Max)

Features:

  • Low cost, accurate high-side current sensing
  • Output voltage scaling
  • Up to 2.5V sense voltage
  • 2.5V to 20V supply range
  • 4 μA quiescent current
  • 1% typical accuracy
  • SOT23 and SM8 packages
  • AEC-Q100.3 qualified; ZXCT1009FTA only

Applications:

  • Battery chargers
  • Smart battery packs
  • DC motor control
  • Over current monitor
  • Power management
  • Level translating
  • Programmable current source

Package:

  • SOT23
  • SM8

ZXCT1009 Features

  • Low cost, accurate high-side current sensing
  • Output voltage scaling
  • Up to 2.5V sense voltage
  • 2.5V to 20V supply range
  • 4 μ A quiescent current
  • 1% typical accuracy
  • SOT23 and SM8 packages
  • AEC-Q100.3 qualified; ZXCT1009FTA only

ZXCT1009 Applications

  • Battery chargers
  • Smart battery packs
  • DC motor control
  • Over current monitor
  • Power management
  • Level translating
  • Programmable current source

·

ZXCT1009 Pin Configuration

Pin NamePin Function
V SENSE+Connection to supply voltage
V SENSE-Connection to load
I OUTOutput current, proportional to measured current

ZXCT1009 Electrical Characteristics

SymbolParameterConditionsLimitsLimitsLimitsUnits
MinTypMax
V INV CC range2.520V
I OUT 1Output CurrentV SENSE = 0V V SENSE = 10mV V SENSE = 100mV V SENSE = 200mV V SENSE = 1V1 90 0.975 1.95 9.64 104 1.002 2.0 9.9815 120 1.025 2.05 10.2μA μA mA mA mA
V SENSE †Sense Voltage02500mV
I SENSE-V SENSE - Input Current100nA
A CCAccuracyR SENSE = 0.1 Ω V SENSE = 200mV-2.52.5%
G MTransconductance, I OUT /V SENSE10000μA/V
BWBandwidthV SENSE(DC) = 10mv, RF P IN = -40dBm ‡ V SENSE(DC) = 100mv, RF P IN = -20dBm ‡300 2kHz MHz

ZXCT1009 Absolute Maximum Ratings

DescriptionDescriptionRatingUnit
Voltage on any pin (relative to I OUT)Voltage on any pin (relative to I OUT)-0.6 to 20V
Continous output current, I OUTContinous output current, I OUT25mA
Continuous sense voltage, V SENSE †Continuous sense voltage, V SENSE †-0.5 to +5V
Operating temperature, T AOperating temperature, T A-40 to 85°C
Storage temperatureStorage temperature-55 to 125°C
Package power dissipation@T =SOT23450mW
A 25°C (Derate to zero @125°C)SM82W

ZXCT1009 Typical Application

The following text describes how to scale a load current to an output voltage.{ l } V _ { S E N S E } = V _ { I N } - V _ { L O A D } V _ { O U T } = 0 . 0 1 x V _ { S E N S E } x R o u T ^ { 1 }E.g.

  • A 1A current is to be represented by a 100mV output voltage:
    1. Choose the value of RSENSE to give 50mV >

VSENSE > 500mV at full load.

For example VSENSE = 100mV at 1.0A.

RSENSE = 0.1/1.0 => 0.1 Ω .

  1. Choose ROUT to give VOUT = 100mV, when

VSENSE = 100mV.

Rearranging 1 for Rout gives:

ROUT = VOUT /(VSENSE x 0.01)

ROUT = 0.1 / (0.1 x 0.01) = 100 Ω

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
ZXCT1009FTADiodes IncorporatedTO-236-3, SC-59, SOT-23-3

More part numbers on this datasheet

Their pages show this same datasheet. Some are linked through their part family rather than checked part by part, so confirm the exact part in the ordering information.

Other Integrated Circuits

All Integrated Circuits datasheetsAll Diodes datasheets (217)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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