MAX4376/MAX4377/MAX4378
Single/Dual/Quad, High-Side Current-Sen
Amplifiers with Internal Gain
________________________________________________________________Maxim Integrated Products
1
19-1781; Rev 3; 5/04
General Description
The MAX4376/MAX4377/MAX4378 single, dual, and quad precision high-side current-n amplifiers are available in space-saving packages. They feature buffered voltage outputs that eliminate the need for gain-tting resistors and are ideal for today’s notebook computers, cell phones, and other systems where cur-rent monitoring is critical. The precision devices are offered in three fixed-gain versions of 20, 50, and 100:
GAIN SUFFIX 20T 50F 100 H
For example, MAX4376TAUK is a single high-side amplifier with a gain of 20.
High-side current monitoring is especially uful in bat-tery-powered systems since it does not interfere with the ground path of the battery charger. The input com-mon-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-n feedback remains viable even when connected to a battery pack in deep discharge.
The full-scale current reading can be t by choosing the appropriate voltage gain and external-n resis-tor. This capability offers a high level of integration and flexibility, resulting in a simple and compact current-n solution.
The MAX4376/MAX4377/MAX4378 operate over a sup-ply voltage range of +3V to +28V, draw 1mA of supply current per amplifier, and operate over the full automo-tive temperature range of -40°C to +125
°C. The devices have a wide bandwidth of 2MHz, making them suitable for u inside battery-charger control loops.The buffered outputs drive up to 2mA of output current into a ground-referenced load.
The MAX4376 is available in a tiny 5-pin SOT23 pack-age. The MAX4377/MAX4378 are available in space-saving 8-pin µMAX and 14-pin TSSOP packages,respectively.
Applications
武神赵子龙演员表Features
o Low-Cost, Single/Dual/Quad, High-Side Current-Sen Amplifiers
o ±0.5% Typical Full-Scale Accuracy o +3V to +28V Supply Operation
o
Adjustable Current-Sen Capability with External Sen Resistor
o Buffered Output Voltage with 2mA Drive o 1mA (typ) Supply Current
o 2.0MHz Bandwidth (Gain = +20V/V)
o Automotive Temperature Range (-40°C to +125°C)o Full 0 to 28V Common-Mode Range, Independent of Supply Voltage
o Three Gain Versions Available
+20V/V (MAX437_T)+50V/V (MAX437_F)+100V/V (MAX437_H)
o Available in Space-Saving 5-Pin SOT23 (Single), 8-Pin µMAX (Dual), and 14-Pin TSSOP (Quad)
Ordering Information continued at end of data sheet.
Ordering Information
Notebook Computers Current-Limited Power Supplies
Fuel Gauges in PC
General-System/Board-Level Current Monitoring Battery Chargers
Portable/Battery-Powered Systems Cell Phones
Smart Battery Packages Automotive Current Detect Power Management Systems
PA Bias Control
Pin Configurations
For pricing, delivery, and ordering information,plea contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at
M A X 4376/M A X 4377/M A X 4378
改host
Single/Dual/Quad, High-Side Current-Sen Amplifiers with Internal Gain
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V RS+= 0 to 28V, V SENSE = (V RS+- V RS-) = 0V, V CC = +3.0V to +28V, R L = ∞, T A = T MIN to T MAX,unless otherwi noted. Typical values are at T A = 25°C.) (Note 1)
Stress beyond tho listed under “Absolute Maximum Ratings” may cau permanent damage to the device. The are stress ratings only, and functional operation of the device at the or any other conditions beyond tho indicated in the operational ctions of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
V CC , RS+, RS- -0.3V to +30V OUT -0.3V to (V CC + 0.3V) Differential Input Voltage (V RS+- V RS- ).................................±8V Output Short Circuit to V CC ........................................Continuous Output Short Circuit 1s Current into .±20mA Continuous Power Dissipation (T A = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW 8-Pin µMAX (derate 4.5mW/°C above +70°C).............362mW 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW 14-Pin TSSOP (derate 9.1mW/°C above +70°C).........727mW Operating Temperature Range .........................-40°C to +125°C +150°C Storage -65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
MAX4376/MAX4377/MAX4378
Single/Dual/Quad, High-Side Current-Sen
Amplifiers with Internal Gain
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ELECTRICAL CHARACTERISTICS (continued)
(V RS+= 0 to 28V, V SENSE = (V RS+- V RS-) = 0V, V CC = +3.0V to +28V, R L = ∞, T A = T MIN to T MAX,unless otherwi noted. Typical values are at T A = 25°C.) (Note 1)
Note 4:V SENSE such that V OUT is in saturation.
M A X 4376/M A X 4377/M A X 4378
Single/Dual/Quad, High-Side Current-Sen Amplifiers with Internal Gain 4_______________________________________________________________________________________
0.50
0.650.600.550.700.750.800.850.900.951.000
10
5
15
20
25
30
SUPPLY CURRENT (PER AMPLIFIER)
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
S U P P L Y C U R R E N T (m A )
0.40.20.80.61.21.01.4-50
025-255075100125SUPPLY CURRENT (PER AMPLIFIER)
vs. TEMPERATURE
TEMPERATURE (°C)S U P P L Y C U R R E N T (m A )
-1.0
-0.8-0.6-0.4-0.20.00.20.40.60.81.01.2
0510********
TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGE (V SENSE
= 100mV)
SUPPLY VOLTAGE (V)
T O T A L O U T P U T E R R O R (%)
-
1-20123456TOTAL OUTPUT ERROR
vs. SUPPLY VOLTAGE (V SENSE = 6.25mV)
T O T A L O U T P U T E R R O R (%)
-4-30
10寒假中的一件事
5
15
20
25
30
SUPPLY VOLTAGE (V)
-
1.0
-0.4-0.6-0.8-0.200.20.40.60.81.0
010*********
TOTAL OUTPUT ERROR vs. COMMON-MODE VOLTAGE
COMMON-MODE VOLTAGE (V)
T O T A L O U T P U T E R R O R (%)
-2.0
-1.0-1.50-0.51.51.00.52.0GAIN ACCURACY vs. TEMPERATURE
TEMPERATURE (°C)G A I N A C C U R A C Y (%)
-50
-25
25
50
关系学75
100
125Typical Operating Characteristics
(V CC = V RS+ = 12V, V SENSE = 100mV, T A = +25°C.)
-1.0
-0.6-0.8-0.2-0.40.200.40.80.61.0
-50025-255075100125150
TOTAL OUTPUT ERROR vs. TEMPERATURE
TEMPERATURE (°C)
T O T A L O U T P U T E R R O R (%)
MAX4376/MAX4377/MAX4378
Single/Dual/Quad, High-Side Current-Sen
班级发展规划Amplifiers with Internal Gain
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Typical Operating Characteristics (continued)
(V CC = V RS+ = 12V, V SENSE = 100mV, T A = +25°C.)
2µs/div
MAX4376F
SMALL-SIGNAL TRANSIENT RESPONSE
(V SENSE = 95mV TO 100mV)
IN 5mV/div
OUT 100mV/div
95mV
100mV 5V
4.75V
C L = 15pF R L = 2.5k Ω
2µs/div
MAX4376H
SMALL-SIGNAL TRANSIENT RESPONSE
(V SENSE = 95mV to 100mV)
IN 5mV/div
OUT 200mV/div
95mV
100mV 10V
9.5V
C L = 15pF R L = 5k Ω
2µs/div MAX4376T
LARGE-SIGNAL TRANSIENT RESPONSE
(V SENSE = 6mV to 100mV)
IN 45mV/div
OUT 500mV/div
6mV 100mV 2V
0.120V
C L = 15pF R L = 1k Ω
-2
0-121435TOTAL OUTPUT ERROR
vs. FULL-SCALE SENSE VOLTAGE
V SENSE (mV)
T O T A L O U T P U T E R R O R (%)
50
100150
200
2µs/div
MAX4376T
SMALL-SIGNAL TRANSIENT RESPONSE
(V SENSE = 95mV TO 100mV)
IN 5mV/div
OUT 50mV/div
心理焦虑95mV
100mV 2.0V
1.9V
孤篇压全唐
C L = 15pF R L =1k Ω
2µs/div
MAX4376F
LARGE-SIGNAL TRANSIENT RESPONSE
(V SENSE = 6mV to 100mV)
千张卷
IN 45mV/div
OUT 2V/div
6mV
100mV 5V
0.3V
C L = 15pF R L = 2.5k Ω
