Analog Devices Inc.（ADI） MAX4173FEUT+T

View All Display Drivers by Analog Devices Inc.（ADI）

Part Number:
MAX4173FEUT+T
Manufacturer:
Analog Devices Inc.（ADI）
Category:
Display Drivers
RoHs:
RoHS Compliant
Datasheet:
Description:
IC CURRENT SENSE 1 CIRCUIT SOT6
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Specifications

Type

Paramete

Type

Paramete

Voltage - Supply Span (Min)

3 V

Current - Output / Channel

Slew Rate

Output Type

Supplier Device Package

SOT-6

Voltage - Supply Span (Max)

28 V

Current - Input Bias

700 µA

Gain Bandwidth Product

Voltage - Input Offset

300 µV

-3db Bandwidth

1.4 MHz

Current - Supply

420µA

Mounting Type

Surface Mount

Operating Temperature

-40°C ~ 85°C

Amplifier Type

Current Sense

Grade

Package / Case

SOT-23-6

Number of Circuits

Qualification

Overview

MAX4173FEUT+T Datasheet Summary

1. Basic Information

Part Number: MAX4173FEUT+T
Manufacturer: Maxim Integrated
Device Type: Low‑Cost, Voltage‑Output, High‑Side Current‑Sense Amplifier
Package: 6‑Pin SOT23 (Tape‑and‑Reel)
Top Mark: AABO
RoHS: Lead‑free / RoHS‑compliant
Gain: 50 V/V
Temperature Range: −40 °C to +85 °C

2. Key Features

High‑side current sensing with 0 V to +28 V input common‑mode range (independent of supply voltage)
Fixed voltage gain 50 V/V, no external gain resistors required
±0.5% full‑scale accuracy (at 25 °C)
Input offset voltage: typ ±0.3 mV, max ±3 mV (at 25 °C)
Wide bandwidth: 1.4 MHz (VSENSE = 100 mV)
Low supply current: typ 420 µA
Supply voltage: +3 V to +28 V
Compact SOT23‑6 package
No phase reversal when overdriven

3. Pin Configuration (SOT23‑6, Top View)

Pin	Name	Function
1, 2	GND	Ground
3	VCC	Supply voltage; bypass with 0.1 µF capacitor to GND
4	RS+	High‑side connection to external sense resistor
5	RS−	Load‑side connection to external sense resistor
6	OUT	Voltage output proportional to VSENSE = VRS+ − VRS−

4. Absolute Maximum Ratings

VCC, RS+, RS− to GND: −0.3 V to +30 V
OUT to GND: −0.3 V to (VCC + 0.3 V)
Differential input voltage (VRS+ − VRS−): ±0.3 V
Continuous power dissipation (TA = 70 °C): 696 mW
ESD and pin current: ±20 mA per pin
Storage temperature: −65 °C to +150 °C
Soldering temperature (reflow): +260 °C

5. Electrical Characteristics (TA = −40 °C to +85 °C, VCC = 3–28 V)

Parameter	Conditions	Min	Typ	Max	Unit
Supply Voltage Range	—	3	—	28	V
Common‑Mode Input Range	—	0	—	28	V
Supply Current	VRS+ > 2 V, VCC > 12 V	—	0.42	1.0	mA
Full‑Scale Sense Voltage	—	—	—	150	mV
Gain	—	—	50	—	V/V
Gain Accuracy	VSENSE = 10–150 mV, VCC = VRS+ = 12 V25 °Cfull temp range	—	0.5	±2.5±4.0	%
Total Output Error	VSENSE = 100 mV, VCC = VRS+ = 12 V, 25 °C	—	±0.5	3.25	%
Bandwidth	VSENSE = 100 mV, CL = 5 pF	—	1.4	—	MHz
Settling Time (to 1%)	VSENSE = 6.25 mV ↔ 100 mV, CL = 5 pF	—	400 / 800	—	ns
Power‑Supply Rejection	VSENSE = 32 mV, VRS+ ≥ 2 V	60	91	—	dB
Output Resistance	—	—	12	—	kΩ
Power‑Up Time (to 1%)	VSENSE = 100 mV, CL = 5 pF	—	10	—	µs

6. Functional Description

The MAX4173FEUT+T is a high‑side current‑sense amplifier that produces a voltage output proportional to the current through an external sense resistor RSENSE:

VOUT = GAIN × RSENSE × ILOAD

GAIN = 50 V/V
Common‑mode range 0–28 V works even below supply voltage
Suitable for battery‑powered systems, chargers, and current monitoring

7. Typical Applications

Notebook computers
Portable / battery‑powered systems
Smart battery packs and chargers
Cell phones
Power‑management systems
Board‑level current monitoring
PA bias control
Precision current sources

8. Application Notes

Choose RSENSE to set full‑scale VSENSE (typically ≤100 mV for best accuracy)
Use low‑inductance sense resistors for high‑frequency currents
OUT drives high‑impedance loads (e.g., ADC inputs); output resistance ≈12 kΩ
Bypass VCC with 0.1 µF ceramic capacitor close to the device

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