MAX4080TAUA+ ,76V, High-Side, Current-Sense Amplifiers with Voltage OutputApplicationsamplifiers with an input voltage range that extends from • Wide 4.5V to 76V Input Commo ..
MAX4080TAUA+T ,76V, High-Side, Current-Sense Amplifiers with Voltage OutputApplicationsamplifiers with an input voltage range that extends from • Wide 4.5V to 76V Input Commo ..
MAX4081FASA+ ,76V, High-Side, Current-Sense Amplifiers with Voltage OutputElectrical Characteristics(V = V = 4.5V to 76V, V = V = 5V (MAX4081 only), V = (V - V ) = 0V, R = 1 ..
MAX4081FAUA ,76V / High-Side / Current-Sense Amplifiers with Voltage OutputMAX4080/MAX408119-2562; Rev 0; 10/0276V, High-Side, Current-Sense Amplifiers withVoltage Output
MAX4081SASA ,76V / High-Side / Current-Sense Amplifiers with Voltage OutputFeaturesThe MAX4080/MAX4081 are high-side, current-sense Wide 4.5V to 76V Input Common-Mode Rangea ..
MAX4081SASA+ ,76V, High-Side, Current-Sense Amplifiers with Voltage OutputGeneral Description Beneits and
MAX774CSA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersMAX774/MAX775/MAX77619-0191; Rev 1; 3/94-5V/-12V/-15V or Adjustable, High-Efficiency, Low I Inverti ..
MAX774CSA+ ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-to-DC ControllersMAX774/MAX775/MAX77619-0191; Rev 2; 12/02-5V/-12V/-15V or Adjustable, High-Efficiency, Low I Invert ..
MAX774EPA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersMAX774/MAX775/MAX77619-0191; Rev 1; 3/94-5V/-12V/-15V or Adjustable, High-Efficiency, Low I Inverti ..
MAX774ESA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersFeaturesThe MAX774/MAX775/MAX776 inverting switching ' 85% Efficiency for 5mA to 1A Load Currentsre ..
MAX774ESA+ ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-to-DC ControllersApplicationsOrdering Information continued on last page.Data CommunicatorsTypical Operating Circuit ..
MAX774ESA+T ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-to-DC ControllersApplicationsOrdering Information continued on last page.Data CommunicatorsTypical Operating Circuit ..
MAX4080FAUA+-MAX4080FAUA+T-MAX4080SASA+-MAX4080SASA+T-MAX4080SAUA+-MAX4080SAUA+T-MAX4080TASA+-MAX4080TASA+T-MAX4080TAUA+-MAX4080TAUA+T-MAX4081FASA+-MAX4081SASA+-MAX4081SAUA+-MAX4081SAUA+T-MAX4081TASA+-MAX4081TAUA+
76V, High-Side, Current-Sense Amplifiers with Voltage Output
Selector Guide appears at end of data sheet.µMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
General DescriptionThe MAX4080/MAX4081 are high-side, current-sense
amplifiers with an input voltage range that extends from
4.5V to 76V making them ideal for telecom, automotive,
backplane, and other systems where high-voltage current
monitoring is critical. The MAX4080 is designed for uni-
directional current-sense applications and the MAX4081
allows bidirectional current sensing. The MAX4081 sin-
gle output pin continuously monitors the transition from
charge to discharge and avoids the need for a separate
polarity output. The MAX4081 requires an external refer-
ence to set the zero-current output level (VSENSE = 0V).
The charging current is represented by an output voltage
from VREF to VCC, while discharge current is given from
VREF to GND.
For maximum versatility, the 76V input voltage range
applies independently to both supply voltage (VCC) and
common-mode input voltage (VRS+). High-side current
monitoring does not interfere with the ground path of the
load being measured, making the MAX4080/MAX4081
particularly useful in a wide range of high-voltage sys-
tems.
The combination of three gain versions (5V/V, 20V/V,
60V/V = F, T, S suffix) and a user-selectable, external
sense resistor sets the full-scale current reading and its
proportional output voltage. The MAX4080/MAX4081
offer a high level of integration, resulting in a simple, accu-
rate, and compact current-sense solution.
The MAX4080/MAX4081 operate from a 4.5V to 76V sin-
gle supply and draw only 75µA of supply current. These
devices are specified over the automotive operating tem-
perature range (-40°C to +125°C) and are available in a
space-saving 8-pin µMAX® or SO package.
Applications●Automotive (12V, 24V, or 42V Batteries)●48V Telecom and Backplane Current Measurement●Bidirectional Motor Control●Power-Management Systems●Avalanche Photodiode and PIN-Diode Current
Monitoring●General System/Board-Level Current Sensing●Precision High-Voltage Current Sources
Beneits and Features●Ideal for High-Voltage Current Monitoring ApplicationsWide 4.5V to 76V Input Common-Mode RangeIndependent Operating Supply Voltage●High Accuracy and Low Quiescent Current Support
Precision Application Requirements±0.1% Full-Scale AccuracyLow 100μV Input Offset VoltageThree Gain Versions Available-5V/V (MAX4080F/MAX4081F)-20V/V (MAX4080T/MAX4081T)-60V/V (MAX4080S/MAX4081S)75μA Supply Current (MAX4080)●Flexible Current Sensing Supports Monitoring of
Charge and Discharge of BatteriesBidirectional (MAX4081) or Unidirectional
(MAX4080) ISENSEReference Input for Bidirectional OUT (MAX4081)●Minimizes Required Board Space8-Pin μMAX Package
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
PARTTEMP RANGEPIN-PACKAGE
MAX4080FAUA+-40°C to +125°C8 µMAX
MAX4080FAUA/V+-40°C to +125°C8 µMAX
MAX4080FASA+-40°C to +125°C8 SO
MAX4080TAUA+-40°C to +125°C8 µMAX
MAX4080TAUA/V+-40°C to +125°C8 µMAX
N.C.
OUTGND+
RS-
N.C.VCC
N.C.
RS+
µMAX/SO
TOP VIEW
MAX4080
REF1B
OUTGND
RS-
REF1AVCC
N.C.
RS+
µMAX/SO
MAX4081
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
Pin Conigurations
Ordering Information
EVALUATION KIT AVAILABLE
VCC to GND ..........................................................-0.3V to +80V
RS+, RS- to GND ..................................................-0.3V to +80V
OUT to GND ..........-0.3V to the lesser of +18V or (VCC + 0.3V)
REF1A, REF1B to GND
(MAX4081 Only) -0.3V to the lesser of +18V or (VCC + 0.3V)
Output Short Circuit to GND......................................Continuous
Differential Input Voltage (VRS+ - VRS-) ..............................±80V
Current into Any Pin .........................................................±20mA
Continuous Power Dissipation (TA = +70°C)8-Pin MAX (derate 4.5mW/°C above +70°C) ............362mW8-Pin SO (derate 5.88mW/°C above +70°C) ...............471mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
(VCC = VRS+ = 4.5V to 76V, VREF1A = VREF1B = 5V (MAX4081 only), VSENSE = (VRS+ - VRS-) = 0V, RLOAD = 100kΩ, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSOperating Voltage RangeVCCInferred from PSRR test4.576V
Common-Mode RangeCMVRInferred from CMRR test (Note 3)4.576V
Supply CurrentICCVCC = VRS+ = 76V,
no load
MAX408075190µAMAX4081103190
Leakage CurrentIRS+, IRS-VCC = 0V, VRS+ = 76V0.012µA
Input Bias CurrentIRS+, IRS-VCC = VRS+ = 76V512µA
Full-Scale Sense Voltage
(Note 4)VSENSE
MAX4080F/MAX4081F±1000MAX4080T/MAX4081T±250
MAX4080S/MAX4081S±100
GainAV
MAX4080F/MAX4081F5
V/VMAX4080T/MAX4081T20
MAX4080S/MAX4081S60
Gain AccuracyDAVVCC = VRS+ = 48V
(Note 5)
TA = +25°C±0.1±0.6TA = -40°C to +85°C±1
TA = TMIN to TMAX±1.2
Input Offset VoltageVOSVCC = VRS+ = 48V
(Note 6)
TA = +25°C±0.1±0.6TA = -40°C to +85°C±1
TA = TMIN to TMAX±1.2
Common-Mode Rejection Ratio
(Note 7)CMRRVCC = 48V, VRS+ = 4.5V to 76V100124dB
Power-Supply Rejection Ratio
(Note 7)PSRRVRS+ = 48V, VCC = 4.5V to 76V100122dB
OUT High Voltage(VCC –
VOH)
VCC = 4.5V, VRS+
= 48V, VREF1A =
VREF1B = 2.5V,
IOUT (sourcing) =
+500µA (Note 8)
MAX4080F/MAX4081F,
VSENSE = 1000mV
0.150.27VMAX4080T/MAX4081T,
VSENSE = 250mV
MAX4080S/MAX4081S,
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
DC Electrical CharacteristicsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Absolute Maximum Ratings
(VCC = VRS+ = 4.5V to 76V, VREF1A = VREF1B = 5V (MAX4081 only), VSENSE = (VRS+ - VRS-) = 0V, RLOAD = 100kΩ, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSOUT Low VoltageVOL
VCC = VRS+ = 48V,
VREF1A = VREF1B =
2.5V, VSENSE =
-1000mV (for
MAX4081 only)
IOUT (sinking) = 10µA415
IOUT (sinking) = 100µA2355
REF1A = REF1B Input Voltage
Range (MAX4081 Only)
(VREF –
VGND)
Inferred from REF1A rejection ratio,
VREF1A = VREF1B1.56V
REF1A Input Voltage Range
(MAX4081 Only)
(VREF1A –
VGND)
Inferred from REF1A rejection ratio,
VREF1B = VGND312V
REF1A Rejection Ratio
(MAX4081 Only)
VCC = VRS+ = 48V, VSENSE = 0V,
VREF1A = VREF1B = 1.5V to 6V80108dB
REF/REF1A Ratio
(MAX4081 Only)
VREF1A = 10V, VREF1B = VGND,
VCC = VRS+ = 48V (Note 2)0.4970.5000.503
REF1A Input Impedance
(MAX4081 Only)VREF1B = VGND250kΩ
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
DC Electrical Characteristics (continued)
Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design.
Note 2: VREF is defined as the average voltage of VREF1A and VREF1B. REF1B is usually connected to REF1A or GND. VSENSE is defined as VRS+ - VRS-.
Note 3: The common-mode range at the low end of 4.5V applies to the most positive potential at RS+ or RS-. Depending on the polarity of VSENSE and the device’s gain, either RS+ or RS- can extend below 4.5V by the device’s typical full-scale value of
VSENSE.
Note 4: Negative VSENSE applies to MAX4081 only.
Note 5: VSENSE is: MAX4080F, 10mV to 1000mV
MAX4080T, 10mV to 250mV
MAX4080S, 10mV to 100mV
MAX4081F, -500mV to +500mV
MAX4081T, -125mV to +125mV
MAX4081S, -50mV to +50mV
Note 6: VOS is extrapolated from the gain accuracy test for the MAX4080 and measured as (VOUT - VREF)/AV at VSENSE = 0V, for the MAX4081.
Note 7: VSENSE is: MAX4080F, 500mV
MAX4080T, 125mV
MAX4080S, 50mV
MAX4081F/T/S, 0V
VREF1B = VREF1A = 2.5V
Note 8: Output voltage is internally clamped not to exceed 18V.
Note 9: Output settles to within 1% of final value.
Note 10: The device will not experience phase reversal when overdriven.
(VCC = VRS+ = 4.5V to 76V, VREF1A = VREF1B = 5V (MAX4081 only), VSENSE = (VRS+ - VRS-) = 0V, RLOAD = 100kΩ, CLOAD = 20pF,
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITSBandwidthBWVCC = VRS+ = 48V,
VOUT = 2.5V
MAX4080F/T/S250
kHzMAX4081F/T/S150
OUT Settling Time to 1% of Final
Value
VSENSE = 10mV to 100mV20µs
VSENSE = 100mV to 10mV20
Capacitive-Load StabilityNo sustained oscillations500pF
Output ResistanceROUTVSENSE = 100mV0.1Ω
Power-Up TimeVCC = VRS+ = 48V, VSENSE = 100mV (Note 9)50µs
Saturation Recovery Time(Notes 9,10)50µs
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
AC Electrical Characteristics
(VCC = VRS+ = 48V, VSENSE = 0V, CLOAD = 20pF, RLOAD = ∞, TA = +25°C, unless otherwise noted.)
MAX4080 toc09
GAIN (dB)
MAX4081F/T/S
SMALL-SIGNAL GAIN vs. FREQUENCY
VOUT = 100mVP-P
MAX4081S
MAX4081T
MAX4081F
MAX4080 toc08
GAIN (dB)
MAX4080F/T/S
SMALL-SIGNAL GAIN vs. FREQUENCY
VSENSE = 10mV
MAX4080S
MAX4080T
MAX4080F
MAX4080 toc07
REFERENCE REJECTION RATIO (dB)-110
MAX4081F/T/S
REFERENCE REJECTION RATIO
vs. FREQUENCY
10k1k100101100k
MAX4080 toc06
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO (dB)
100k10k1k10010
-1301M
MAX4081F/T/S
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCYMAX4080 toc05
FREQUENCY (Hz)
COMMON-MODE REJECTION RATIO (dB)
100k10k1k10010
-1301M
MAX4081F/T/S
COMMON-MODE REJECTION RATIO
vs. FREQUENCYGAIN ACCURACY vs. VCCMAX4080 toc04
VCC (V)
GAIN ACCURACY (%)52402816
VRS+ = 48V
S VERSION
T VERSION
F VERSION
GAIN ACCURACY vs. TEMPERATURE
MAX4080 toc03
TEMPERATURE (°C)
GAIN ACCURACY (%)
INPUT OFFSET VOLTAGE
vs. TEMPERATUREMAX4080 toc02
INPUT OFFSET VOLTAGE (V)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE HISTOGRAM
MAX4080 toc01
INPUT OFFSET VOLTAGE (µV)
PERCENTAGE (%)
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
Typical Operating Characteristics
(VCC = VRS+ = 48V, VSENSE = 0V, CLOAD = 20pF, RLOAD = ∞, TA = +25°C, unless otherwise noted.)
MAX4080 toc18
INPUT
5mV/div
OUTPUT
300mV/div
20µs/div
MAX4080S
SMALL-SIGNAL TRANSIENT RESPONSEMAX4080 toc17
INPUT
5mV/div
OUTPUT
100mV/div
20µs/div
MAX4080T
SMALL-SIGNAL TRANSIENT RESPONSEMAX4080 toc16
INPUT
5mV/div
OUTPUT
25mV/div
20µs/div
MAX4080F
SMALL-SIGNAL TRANSIENT RESPONSEVOUT LOW VOLTAGE
vs. IOUT (SINKING)
MAX4080 toc15
IOUT (SINKING) (µA)
OUT
LOW VOLTAGE (mV)
TA = +125°C
TA = +85°C
TA = +25°C
TA = 0°C
TA = -40°C
VCC = 4.5V
MAX4080 toc14
IOUT (SOURCING) (mA)
OUT
HIGH VOLTAGE (V
- V
) (V)
VOUT HIGH VOLTAGE
vs. IOUT (SOURCING)
VCC = 4.5V
TA = +125°C
TA = +85°C
TA = +25°C
TA = 0°CTA = -40°C
MAX4081
SUPPLY CURRENT vs. TEMPERATURE
MAX4080 toc13
TEMPERATURE (°C)
SUPPLY CURRENT (
VREF1A = VREF1B = 2.5V
MAX4080
SUPPLY CURRENT vs. TEMPERATURE
MAX4080 toc12
TEMPERATURE (°C)
SUPPLY CURRENT (
MAX4080 toc11
VCC (V)
SUPPLY CURRENT (52162840
MAX4081
SUPPLY CURRENT vs. VCC
VREF = 2.5V
NO LOAD
VSENSE = 0V281640526476
MAX4080
SUPPLY CURRENT vs. VCCMAX4080 toc10
VCC (V)
SUPPLY CURRENT (
NO LOAD
VSENSE = 0V
MAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
Typical Operating Characteristics (continued)
(VCC = VRS+ = 48V, VSENSE = 0V, CLOAD = 20pF, RLOAD = ∞, TA = +25°C, unless otherwise noted.)
MAX4080 toc27
INPUT
33mV/div
OUTPUT
2V/div
20µs/div
MAX4081S
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc26
INPUT
100mV/div
OUTPUT
2V/div
20µs/div
MAX4081T
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc25
INPUT
400mV/div
OUTPUT
2V/div
20µs/div
MAX4081F
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc24
INPUT
33mV/div
OUTPUT
2V/div
20µs/div
MAX4080S
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc23
INPUT
100mV/div
OUTPUT
2V/div
20µs/div
MAX4080T
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc22
INPUT
400mV/div
OUTPUT
2V/div
20µs/div
MAX4080F
LARGE-SIGNAL TRANSIENT RESPONSEMAX4080 toc21
INPUT
1mV/div
OUTPUT
50mV/div
20µs/div
MAX4081S
SMALL-SIGNAL TRANSIENT RESPONSEMAX4080 toc20
INPUT
2.5mV/div
OUTPUT
50mV/div
20µs/div
MAX4081T
SMALL-SIGNAL TRANSIENT RESPONSEMAX4080 toc19
INPUT
10mV/div
OUTPUT
50mV/div
20µs/div
MAX4081F
SMALL-SIGNAL TRANSIENT RESPONSEMAX4080/MAX408176V, High-Side, Current-Sense Ampliiers
with Voltage Output
Typical Operating Characteristics (continued)
