MAX9922EUB+-MAX9923FEUB+-MAX9923HEUB+-MAX9923TEUB+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX9922EUB+ ,Ultra-Precision, High-Side Current-Sense AmplifiersApplications+Denotes a lead(Pb)-free/RoHS-compliant package.Notebook/Desktop Power ManagementHandhe ..
MAX9923FEUB+ ,Ultra-Precision, High-Side Current-Sense Amplifiersapplications where high accuracy,♦ Extended Temperature Range (-40°C to +85°C)large common-mode mea ..
MAX9923HEUB+ ,Ultra-Precision, High-Side Current-Sense AmplifiersFeaturesThe MAX9922/MAX9923 ultra-precision, high-side cur-♦ Ultra-Precision V Over TemperatureOSre ..
MAX9923TEUB+ ,Ultra-Precision, High-Side Current-Sense AmplifiersELECTRICAL CHARACTERISTICS(V = V = V +12V, V = +3.3V, V = 0V, V = V /2 for bidirectional, V = 0V fo ..
MAX9924UAUB+ ,Variable-Reluctance Sensor Interface with Differential Input and Adaptive Peak ThresholdFeaturesThe MAX9924–MAX9927 variable reluctance (VR or mag-♦ Differential Input Stage Provides Enha ..
MAX9926UAEE , Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold
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MAX9922EUB+-MAX9923FEUB+-MAX9923HEUB+-MAX9923TEUB+
Ultra-Precision, High-Side Current-Sense Amplifiers
General Description
The MAX9922/MAX9923 ultra-precision, high-side cur-
rent-sense amplifiers feature ultra-low offset voltage
(VOS) of 25µV (max) and laser-trimmed gain accuracy
better than 0.5%. The combination of low VOSand high-
gain accuracy allows precise current measurements
even at very small sense voltages.
The MAX9922/MAX9923 are capable of both unidirec-
tional and bidirectional operation. For unidirectional
operation, connect REF to GND. For bidirectional oper-
ation, connect REF to VDD/2.
The MAX9922 has adjustable gain set with two external
resistors. The MAX9923T/MAX9923H/MAX9923F use an
internal laser-trimmed resistor for fixed gain of 25V/V,
100V/V, and 250V/V, respectively. The devices operate
from a +2.85V to +5.5V single supply, independent
of the input common-mode voltage, and draw only 700µA
operating supply current and less than 1µA in shutdown.
The +1.9V to +28V current-sense input common-mode
voltage range makes the MAX9922/MAX9923 ideal for
current monitoring in applications where high accuracy,
large common-mode measurement range, and mini-
mum full-scale VSENSEvoltage is critical.
The MAX9922/MAX9923 use a spread-spectrum
autozeroing technique that constantly measures and
cancels the input offset voltage, eliminating drift over
time and temperature, and the effect of 1/f noise. This,
in conjunction with the indirect current-feedback tech-
nique, achieves less than 25µV (max) offset voltage.
The MAX9922/MAX9923 are available in a small 10-pin
µMAX®package and are specified over the -40°C to
+85°C extended temperature range.
Applications
Notebook/Desktop Power Management
Handheld Li+ Battery Current Monitoring
Precision Current Sources
FeaturesUltra-Precision VOSOver Temperature
MAX9922: ±10µV (max)
MAX9923T: ±25µV (max)
MAX9923H: ±20µV (max)
MAX9923F: ±10µV (max)±0.5% (max) Full-Scale Gain AccuracyBidirectional or Unidirectional ISENSEMultiple Gains Available
Adjustable (MAX9922)
+25V/V (MAX9923T)
+100V/V (MAX9923H)
+250V/V (MAX9923F)1.9V to 28V Input Common-Mode Voltage,
Independent of VDDSupply Voltage: +2.85V to +5.5V700µA Supply Current, 1µA Shutdown CurrentExtended Temperature Range (-40°C to +85°C)Available in Space-Saving 10-Pin µMAX
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
Ordering Information
19-4429; Rev 1; 1/10
+Denotes a lead(Pb)-free/RoHS-compliant package.
EVALUATION KIT
AVAILABLE
PARTPIN-
PACKAGE
TEMP
RANGEGAIN (V/V)
MAX9922EUB+10 µMAX- 40°C to + 85° C Adjustable
MAX9923TEUB+10 µMAX- 40°C to + 85° C 25
MAX9923HEUB+10 µMAX- 40°C to + 85° C 100
MAX9923FEUB+10 µMAX- 40°C to + 85° C 250
Pin Configuration
VDD
OUT
REFN.C.
RS-
RS+
RSB
MAX9922
MAX9923T
MAX9923H
MAX9923F
µMAX
TOP VIEW
GNDSHDN
Typical Operating Circuits appear at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VRSB= VRS+= VRS-=+12V, VDD= +3.3V, VGND= 0V, VREF = VDD/2 for bidirectional, VREF = 0V for unidirectional, VSENSE= VRS+- VRS-0V, MAX9922 is set for AV=100V/V (R1= 1kΩ, R2= 99kΩ), SHDN= VDD, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
Stresses 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.
RSB, RS+, RS- to GND...........................................-0.3V to +30V
VDDto GND..............................................................-0.3V to +6V
OUT, REF, FB, SHDN
to GND.................-0.3V to the lower of (VDD + 0.3V) and +6V
OUT Short Circuit to VDDor GND..............................Continuous
Differential Voltage (VRS+- VRS-), (VRSB- VRS+),
(VRSB- VRS-)...................................................................±5.5V
Current into Any Pin..........................................................±20mA
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 4.5mW/°C above +70°C)...........362mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC CHARACTERISTICS
MAX9922 (AV = 100), VSENSE = 0V,
VREF = VDD/2, -40°C ≤ TA ≤ +85°C±0.1±10
MAX9923T, VSENSE = 0V, VREF = VDD/2,
-40°C ≤ TA ≤ +85°C±0.2±25
MAX9923H, VSENSE = 0V, VREF = VDD/2
-40°C ≤ TA ≤ +85°C±0.2±20
Input Offset Voltage
(Notes 2, 3)VOS
MAX9923F, VSENSE = 0V, VREF = VDD/2,
-40°C ≤ TA ≤ +85°C±0.1±10
MAX9922 (AV = 100V/V), VSENSE = 0V,
VREF = VDD/2, -40°C ≤ TA ≤ +85°C±0.05
MAX9923T, VSENSE = 0V, VREF = VDD/2,
-40°C ≤ TA ≤ +85°C±0.20
MAX9923H, VSENSE = 0V, VREF = VDD/2,
-40°C ≤ TA ≤ +85°C±0.10
Input Offset Voltage
Temperature Drift (Notes 2, 4)TCVOS
MAX9923F, VSENSE = 0V, VREF = VDD/2,
-40°C ≤ TA ≤ +85°C±0.05
µV/°C
Input Common-Mode RangeVCMRGuaranteed by CMRR1.9028.00V
Input Common-Mode RejectionCMRR1.9V ≤ VRS+ ≤ 28V, -40°C ≤ TA ≤ +85°C
(Note 2)121140dB
MAX9922Adj
MAX9923T25
MAX9923H100GainAV
MAX9923F250
V/V
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VRSB= VRS+= VRS-=+12V, VDD= +3.3V, VGND= 0V, VREF = VDD/2 for bidirectional, VREF = 0V for unidirectional, VSENSE= VRS+- VRS-0V, MAX9922 is set for AV=100V/V (R1= 1kΩ, R2= 99kΩ), SHDN= VDD, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
TA = +25°C±0.17±0.40MAX9922
(AV = 100)-40°C ≤ TA ≤ +85°C±0.60
TA = +25°C±0.12±0.30
MAX9923T-40°C ≤ TA ≤ +85°C±0.60
TA = +25°C±0.24±0.40
MAX9923H-40°C ≤ TA ≤ +85°C±0.75
TA = +25°C±0.21±0.50
Gain Accuracy
(Note 5)ΔAV
MAX9923F-40°C ≤ TA ≤ +85°C±0.80
MAX9922 (AV = 100)±0.06
MAX9923T±0.04
MAX9923H±0.06Gain Nonlinearity~AV
MAX9923F±0.12
Open-Loop GainAVOLMAX9922160dB
Input Bias CurrentIRS+, IRS- 1pA
FB Bias CurrentIFBMAX99221pA
FB ResistanceRFBMAX9923T/MAX9923H/MAX9923F resistance
between FB and REF1kΩ
TA = +25°C0VDD -
1.4REF Input RangeGuaranteed by REF
CMRR test-40°C ≤ TA ≤ +85°C0VDD -
REF Common-Mode Rejection
Ratio0 ≤ REF ≤ VDD - 1.4V (Note 2)94100dB
MAX9922 (bidirectional)±20
MAX9923T (bidirectional)±60±70
MAX9923H (bidirectional)±16±20
REF Input Current
(Note 6)
MAX9923F (bidirectional)±6±7
RL = 10kΩ to GND
and REF = GND730
OUT High VoltageVOHVOH = VDD – VOUT
(Note 7)RL = 10kΩ to VDD
and REF = VDD - 1.416
RL = 10kΩ to GND and REF = GND110OUT Low Voltage (Note 7)VOLRL = 10kΩ to VDD and REF = VDD - 1.4630mV
SHDN Logic-LowVILVDD = 5.5V0.3V
SHDN Logic-HighVIHVDD = 5.5V0.6 x
VDDV
SHDN Input CurrentIIH/IIL0.001±1µA
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VRSB= VRS+= VRS-=+12V, VDD= +3.3V, VGND= 0V, VREF = VDD/2 for bidirectional, VREF = 0V for unidirectional, VSENSE= VRS+- VRS-0V, MAX9922 is set for AV=100V/V (R1= 1kΩ, R2= 99kΩ), SHDN= VDD, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
AC CHARACTERISTICS
MAX992210
MAX9923T50VSENSE = 10mVP-P
MAX9923H10
-3dB Small-Signal BandwidthBW
VSENSE = 5mVP-PMAX9923F2.5
kHz
Slew RateSR∆VOUT = 2V, CLOAD = 100pF0.4V/µs
MAX9922200
MAX9923T100
MAX9923H200
OUT Settling Time to 1% of
Final ValueCLOAD = 7pF
MAX9923F400
Input-Voltage Noise
Peak-to-PeakfO = 0.1Hz to 10Hz3.4µVP-P
Autozeroing Clock FrequencyfCPseudo-random20kHz
Capacitive-Load StabilityNo sustained oscillations200pF
POWER-SUPPLY CHARACTERISTICS
Supply Voltage RangeVDDGuaranteed by PSRR2.855.50V
Power-Supply Rejection RatioPSRR2.85V ≤ VDD ≤ 5.5V, -40°C ≤ TA ≤ +85°C
(Note 2)9399dB
VDD = 5.0V7801300IDDVDD = 3.0V7001500Quiescent Supply Current
IRSBVRSB = 12V200300
IDD_SDV SHDN = 0.3V0.051Shutdown Supply CurrentIRSB_SDV SHDN = 0.3V, VRSB = 28V0.051µA
Power-Down Input CurrentIRS+L,
IRS-LVDD = VREF = 0V, VRSB = VRS+ = VRS- = 28V0.010.1µA
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
Note 1:All devices are 100% production tested at TA= +85°C. All temperature limits are guaranteed by design.
Note 2:VOSis measured in bidirectional mode with VREF = VDD/2.
Note 3:Data sheet limits are guaranteed by design and bench characterization. Thermocouple effects preclude measurement of
this parameter during production testing. Devices are screened during production testing to eliminate defective units.
Note 4:VOSdrift limits are guaranteed by design and bench characterization and are the average of drift from -40°C to +25°C and
from +25°C to +85°C.
Note 5:VRSB= VRS+= 12V, VREF= VDD/2 for bipolar mode and VREF= 0V for unipolar mode. Gain accuracy and gain linearity are
specified over a VSENSErange that keeps the output voltage 250mV away from the rails to achieve full accuracy. Output of
the part is rail-to-rail, and goes to within 25mV of the rails, but accuracy is not maintained. Linear operation is not guaran-
teed for VSENSEvoltages > ±150mV. See the Typical Operating Characteristicssection for plots of Input vs. Output.
Note 6:This is the worst-case REF current needed to directly drive the bottom terminal of the gain setting resistors, at VDD= 3.3V,
and VREF= VDD/2 while maintaining gain accuracy. An internal 1kΩresistor (R1) is present in the MAX9923T/
MAX9923H/MAX9923F between the FB and REF pins, while in the MAX9922 the resistor is external and user selectable. A
voltage identical to the VSENSEdevelops across this resistor. In all versions the REF input current is dependent on the mag-
nitude and polarity of VSENSE, and in the MAX9922 it is dependent on the value of the external resistor as well. The input
bias current for REF is typically 1pA in the MAX9922 since it connects to the gate of a MOS transistor. See the External
Referencesection for more details.
Note 7:The range of VREF, VCM, and VSENSEmay limit the output swing of the MAX9922 with adjustable gain set to less than
100V/V.
ELECTRICAL CHARACTERISTICS (continued)
(VRSB= VRS+= VRS-=+12V, VDD= +3.3V, VGND= 0V, VREF = VDD/2 for bidirectional, VREF = 0V for unidirectional, VSENSE= VRS+- VRS-0V, MAX9922 is set for AV=100V/V (R1= 1kΩ, R2= 99kΩ), SHDN= VDD, TA= -40°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Power-Down Supply CurrentIRSBLVDD = VREF = 0V, VRSB = VRS+ = VRS- = 28V0.051µA
Power-Up Time
MAX9922, AV = 100V/V, VREF = 0V, VSENSE =
10mV, VDD = 0V to 3.3V, settling to 0.1% of final
value
800µs
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
Typical Operating Characteristics
(VDD= 3.3V, VSHDN= VDD, VRSB= VRS+ = VRS- = 12V, TA= +25°C, unless otherwise noted.)
MAX9922 UNIPOLAR
GAIN ACCURACY HISTOGRAM
MAX9922/23 toc01
GAIN ACCURACY (%)
N (%)
MAX9922 INPUT
OFFSET VOLTAGE HISTOGRAM
MAX9922/23 toc02
VOS (μV)
N (%)420-8-6-4-2-108
MAX9922
OFFSET VOLTAGE DRIFT HISTOGRAM
MAX9922/23 toc03
TCVOS (nV/°C)
N (%)20100-40-30-20-10-5040
INPUT REFERRED OFFSET
vs. INPUT COMMON-MODE VOLTAGE
MAX9922/23 toc04
INPUT COMMON MODE (V)
OFFSET VOLTAGE (20481216
MAX9922
INPUT vs. OUTPUT
MAX9922/23 toc05
DIFFERENTIAL INPUT (mV)
OUTPUT-REF (V)
RF = 100kΩ
RG = 20kΩ
MAX9922
INPUT vs. OUTPUT
MAX9922/23 toc06
DIFFERENTIAL INPUT (mV)
OUTPUT-REF (V)-1505-5
RF = 100kΩ
RG = 1kΩ
GAIN ERROR
vs. INPUT COMMON-MODE VOLTAGE
MAX9922/23 toc07
INPUT COMMON MODE (V)
GAIN ERROR (%)
REF = GND
VOH/VOL
vs. IOH/IOL
MAX9922/23 toc08
OUTPUT CURRENT (mA)
(V)642
VOH
VOL
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
Typical Operating Characteristics (continued)
(VDD= 3.3V, VSHDN= VDD, VRSB= VRS+ = VRS- = 12V, TA= +25°C, unless otherwise noted.)
RSB CURRENT
vs. TEMPERATURE
MAX9922/23 toc10
TEMPERATURE (°C)
SUPPLY CURRENT (mA)3510-15
VRSB = 12VVRSB = 28V
VRSB = 1.9V
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX9922/23 toc11
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
VDD = 3.3V
VDD = 5.5V
VDD = 2.85V
MAX9922
GAIN vs. FREQUENCY
MAX9922/23 toc12
FREQUENCY (Hz)
GAIN (dB)
100E+3
10E+3
1E+3
100E+0
10E+0
1E+0100E-3
10E-31E+6
GAIN = OPEN LOOP
GAIN = 1000
INPUT CMRR
vs. FREQUENCY
MAX9922/23 toc13
FREQUENCY (Hz)
CMRR (dB)
10E+31E+3100E+010E+0
1E+0100E+3
PSRR
vs. FREQUENCY
MAX9922/23 toc14
FREQUENCY (Hz)
PSRR (dB)
10E+31E+3100E+010E+0
1E+0100E+3
SUPPLY CURRENT
vs. TEMPERATURE
MAX9922/23 toc09
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
VDD = 5.5V
VDD = 2.85V
VDD = 3.3V
MAX9922/MAX9923
Ultra-Precision, High-Side
Current-Sense Amplifiers
INPUT NOISE DENSITY
vs. FREQUENCY
MAX9922/23 toc15
FREQUENCY (Hz)
10,0001,000100
250100,000
NOISE DENSITY (nV/
Hz)
32kHz SPIKE ENERGY
= 4.3μVRMS
1s/div
PEAK-TO-PEAK NOISE
(0.1Hz TO 10Hz)
MAX9922/23 toc16
1.25μV/div
LARGE SIGNAL INPUT
STEP RESPONSE (MAX9922, AV = 100)
MAX9922/23 toc17
TIME (200μs/div)
INPUT
(10mV/div)
OUTPUT
(1V/div)
POWER-ON RESPONSE
(MAX9922, AV = 100)
MAX9922/23 toc18
TIME (80μs/div)
OUT
(500mV/div)
VDD
(1V/div)
VSENSE = 10mV
SHUTDOWN ON/OFF TRANSIENT
(MAX9922, AV = 100)
MAX9922/23 toc19
TIME (200μs/div)
SHDN
(1V/div)
OUTPUT
(500mV/div)
VSENSE = 10mV
Typical Operating Characteristics (continued)
(VDD= 3.3V, VSHDN= VDD, VRSB= VRS+ = VRS- = 12V, TA= +25°C, unless otherwise noted.)

Partno	Mfg	Dc	Qty	Available	Descript
MAX9922EUB+	MAIXM	N/a	2500	avai	Ultra-Precision, High-Side Current-Sense Amplifiers
MAX9923FEUB+	MAIXM	N/a	2500	avai	Ultra-Precision, High-Side Current-Sense Amplifiers
MAX9923HEUB+	MAIXM	N/a	2500	avai	Ultra-Precision, High-Side Current-Sense Amplifiers
MAX9923TEUB+	MAIXM	N/a	2500	avai	Ultra-Precision, High-Side Current-Sense Amplifiers