MAX4208AUA+-MAX4208AUA+T Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX4208AUA+-MAX4208AUA+T
Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
General Description
The MAX4208/MAX4209 ultra-low offset and drift instrumen-
tation amplifiers feature exceptional precision specifications,
low power consumption, rail-to-rail output, excellent gain-
bandwidth product, and buffered REFIN/MODE input in a very small μMAX® package. These devices use a spread-
spectrum, autozeroing technique that constantly measures
and corrects the input offset, eliminating drift over time
and temperature and the effect of 1/f noise. This technique achieves less than 20μV offset voltage, allows ground-sens-
ing capability, provides ultra-low CMOS input bias current
and increased common-mode rejection performance.
The MAX4208/MAX4209 provide high-impedance inputs optimized for small-signal differential voltages (±100mV).
All devices provide a gain-bandwidth product of 750kHz.
The MAX4208 provides an adjustable gain with two exter-
nal resistors or unity gain with FB connected to OUT. The MAX4209 is available with a fixed gain of 100V/V with ±0.03% (typ) accuracy. Both devices include a reference input (REF) to level-shift the output, allowing for bipolar sig-
nals in single-supply applications. In both devices, REFIN/
MODE is an input to a precision unity-gain buffer, which
sets the REF voltage to level-shift the output. The internal
REF buffer allows the reference to be set by a simple resis-
tive divider or an ADC reference without any loading error.
The MAX4208/MAX4209 operate with a 2.85V to 5.5V single-supply voltage and consume only 750μA of qui-escent current (when the internal buffer is off) and only 1.4μA in shutdown mode. These amplifiers also operate with ±2.5V dual supplies with REF connected to ground and REFIN/MODE to VSS. The MAX4208/MAX4209 are available in space-saving 8-pin μMAX packages and
are specified over the automotive operating temperature
range (-40°C to +125°C).
Applications●Strain-Gauge Ampliiers●Industrial Process Control●Battery-Powered Medical Equipment●Precision Low-Side Current Sense●Notebook Computers●Differential Voltage Ampliication
Beneits and Features●Spread-Spectrum, Auto-Zero Instrumentation
Amplifiers Improve DC Characteristics to Maximize
Sensor Performance• Input Offset Voltage: ±20μV (max) at +25°C • ±0.25% (max) Gain Error • Low 0.2μV/°C Offset Voltage Drift • 1pA CMOS Input Bias Current • True Ground Sensing with Rail-to-Rail Output • 750kHz Gain-Bandwidth Product ●Buffered REF Input for High Accuracy and Bipolar
Operation ●Low Power Operation Supports Remote Sensing and
Battery-Powered Applications• 2.85V to 5.5V Single-Supply Operation (or ±1.425V to ±2.75V Dual Supplies) • 750μA Supply Current• 1.4μA Shutdown Mode●Adjustable (MAX4208) and Fixed Gain of 100 (MAX4209) Provide Design Flexibility
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
PARTTEMP RANGEPIN-
PACKAGEGAIN
(V/V)
MAX4208AUA+T-40°C to +125°C8 µMAXADJ
MAX4209HAUA+T-40°C to +125°C8 µMAX100
IN-
IN+
REFIN/MODE
REF
MAX4208
VDD
VSSCFB
OUT
REFG = 1 + R2 R1BUFFER OUT =
VDD/2
VDD/2
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision
Instrumentation Amplifiers with REF Buffer
Typical Application Circuit
EVALUATION KIT AVAILABLE
VDD to VSS ..............................................................-0.3V to +6V
All Other Pins ................................(VSS - 0.3V) to (VDD + 0.3V)
OUT Short-Circuit Duration .......................................ContinuousCurrent Into OUT, VDD, and VSS .....................................±25mA
Current Into Any Other Pin ...............................................±20mA
Continuous Power Dissipation (TA = +70°C) μMAX (derate 4.5mW/°C above +70°C) .....................362mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°CLead Temperature (soldering, 10s) .................................+300°C
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
INPUT DC CHARACTERISTICS
Input Offset VoltageVOSMAX4208, G = 100V/V±3±20µVMAX4209H, G = 100V/V±3±20
Input Bias CurrentIB-100mV ≤ VDIFF ≤ +100mV (Note 3)1pA
Input Offset CurrentIOS-100mV ≤ VDIFF ≤ +100mV (Note 3)1pA
Input ResistanceRINVCM = VDD/2
Differential mode2GΩCommon mode2
Gain Error
-20mV ≤ VDIFF ≤ +20mVMAX4208, G = 100V/V0.05±0.25-20mV ≤ VDIFF ≤ +20mVMAX4209H, G = 100V/V0.05±0.25
Gain Nonlinearity(Note 2)
MAX4208, G = 100V/V25150
ppmMAX4209H, G = 100V/V25150
Input Common-Mode RangeVCMGuaranteed by CMRR testVSS - 0.1VDD - 1.30V
Input Common-Mode Rejection
Ratio CMRRVCM = (VSS - 0.1V) to (VDD - 1.30V)106135dB
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Absolute Maximum Ratings
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.
Electrical Characteristics
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Power-Supply Rejection RatioPSRRVDD = 2.85V to 5.5V, VREF = VCM =(VSS + 0.5V)100125dB
REFIN/MODE AND REF DC CHARACTERISTICS
REFIN/MODE Buffer Input Offset Voltage(Note 2)±10±40µV
REFIN/MODE Input Voltage LowVILReference buffer is OFFVSSVSS +
0.05V
REFIN/MODE Input Voltage HighVIHShutdown modeVDD -
0.2VDDV
REFIN/MODE Buffered
Reference Input RangeVREFIN/MODEReference buffer is ON, guaranteed by
REFIN/MODE CMRR testVSS +
0.2VDD -
1.3V
REFIN/MODE Buffer
Common-Mode Rejection Ratio(VSS + 0.2V) ≤ VREF/MODE ≤ (VDD - 1.3V) (Note 2)106135dB
REFIN/MODE Buffer
Power-Supply Rejection RatioVDD = 2.85V to 5.5V, VREF/MODE = VCM = (VSS + 0.5V)100125dB
REFIN/MODE Bias CurrentIREFINVSS < VREFIN/MODE < VDD (Note 3)1pA
REF Common-Mode RangeGuaranteed by reference CMRR test(Note 4)VSSVDD -
1.30V
REF Common-Mode Rejection
RatioVSS ≤ VREF ≤ (VDD - 1.30V)(Note 4)106135dB
REF, FB Bias CurrentMAX4208 (Note 3)1pA
REF Input Current (MAX4209) IREFVDIFF = 0V (Note 5)±10nA
VDIFF = ±100mV (Note 5)±100µA
OUTPUT DC CHARACTERISTICS
Output Voltage Swing(Notes 6 and 7)
VOHVDD - VOUT
RL = 100kΩ3045
RL = 10kΩ5070
RL = 1kΩ250325
VOLVOUT - VSS
RL = 100kΩ3040
RL = 10kΩ5065
RL = 1kΩ250285
Short-Circuit CurrentISC
Source+20Sink-25
Short-Circuit Recovery Time0.50ms
AC CHARACTERISTICS
Gain-Bandwidth ProductGBWMAX4208, G = 1V/V750kHz
Small-Signal BandwidthBWMAX4209H, G =100V/V7.5kHz
Slew Rate (Note 8)SRMAX4208, G = 1V/V, VOUT = 100mV step80V/ms
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Electrical Characteristics (continued)
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.) (Note 1)
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = -40°C to +125°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Settling TimetSTo within 0.1% of inal value
MAX4208,G = 1V/V10µs
MAX4209H120
Maximum Capacitive LoadCLNo sustained oscillations200pF
Input Voltage Noiseen
f = 0.1Hz to 10Hz2.5µVP-P
f = 1kHz140nV/√Hz
Power-Up TimeTo within 0.1% of inal value20ms
Shutdown Enable/Disable
TimetEN, tDIS20ms
POWER SUPPLY
Supply VoltageVDDGuaranteed by PSRR test2.855.50V
Supply CurrentIDD
VREFIN/MODE = VSS,
buffer OFFVDD = 5V0.751.30(VSS + 0.2V) ≤ VREFIN/MODE ≤ (VDD - 1.3V), buffer ONVDD = 5V1.402.30
VREFIN/MODE = VDD, shutdown mode1.45.0µA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
INPUT DC CHARACTERISTICS
Input Offset VoltageVOS
MAX4208, G = 100V/V
TA = +25°C to +85°C±45
TA = -40°C to +125°C±60
MAX4209H, G = 100V/V
TA = +25°C to +85°C±30
TA = -40°C to +125°C±40
Input Offset Voltage
Temperature Drift(Note 2)TCVOS
MAX4208, G = 100V/VTA = +25°C to +85°C0.1±0.45
µV/°CTA = -40°C to +125°C0.1±0.45
MAX4209H, G = 100V/VTA = +25°C to +85°C0.01±0.17
TA = -40°C to +125°C0.01±0.17
Input Bias Current-100mV ≤ VDIFF < +100mV (Note 3)
TA = +85°C10TA = +125°C20
Gain Error
MAX4208, G = 100V/V,-20mV ≤ VDIFF ≤ +20mV
TA = +25°C to +85°C0.30
TA = -40°C to +125°C0.35
MAX4209H, G = 100V/V,-20mV ≤ VDIFF ≤ +20mV
TA = +25°C to +85°C0.30
TA = -40°C to +125°C0.35
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Electrical Characteristics (continued)
Electrical Characteristics
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = -40°C to +125°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Gain Error Temperature Drift (Note 2)
-20mV ≤ VDIFF ≤ +20mV (MAX4208),G = 100V/V
TA = -40°C to +125°C50180
ppm/°C-20mV ≤ VDIFF ≤ +20mV (MAX4209H),G = 100V/V
TA = -40°C to +125°C50180
Gain Nonlinearity(Note 2)GNL
MAX4208,G = 100V/V
TA = +25°C to +85°C210
ppm
TA = -40°C to +125°C700
MAX4209H,G = 100V/V
TA = +25°C to +85°C210
TA = -40°C to +125°C700
Input Common-Mode
RangeVCMGuaranteed by CMRR test,
TA = -40°C to +125°CVSS - 0.1VDD - 1.6V
Input Common-Mode
Rejection RatioCMRR(VSS - 0.1V) ≤ VCM ≤ (VDD - 1.6V)
TA = +25°C to +85°C96
TA = -40°C to +125°C90
Power-Supply Rejection
RatioPSRRVDD = 2.85V to 5.5V,VREF = VCM = VSS + 0.5V
TA = +25°C to +85°C96
TA = -40°C to +125°C90
REFIN/MODE AND REF DC CHARACTERISTICS
REFIN/MODE Buffer Input Offset Voltage
TA = +25°C to +85°C100µV
TA = -40°C to +125°C100
REFIN/MODE Buffered
Reference Input RangeVREFIN/MODEReference buffer is ON, guaranteed by REFIN/
MODE CMRR testVSS + 0.2VDD - 1.6V
REFIN/MODE Input Voltage LowVILReference buffer is OFFVSS + 0.05V
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Electrical Characteristics (continued)
Note 1: Specifications are 100% production tested at +25°C, unless otherwise noted. Limits over temperature are guaranteed by
design.Note 2: Guaranteed by design. Thermocouple and leakage effects preclude measurement of this parameter during production test-
ing. Devices are screened during production testing to eliminate defective units.Note 3: IN+ and IN- are gates to CMOS transistors with typical input bias current of 1pA. CMOS leakage is so small that it is impracti-cal to test and guarantee in production. Max VDIFF is ±100mV. Devices are screened during production testing to eliminate defective units. For the MAX4208, when there are no external resistors, the input bias current at FB and REF is 1pA (typ).Note 4: Setting REF to ground (VSS) is allowed if the REF buffer is off. The unity-gain buffer is on when VREFIN/MODE is between 0.15V and (VDD - 1.3V). In this range, VREF = VREFIN/MODE ±40μV (maximum buffer input offset voltage over tempera-ture). Setting REFIN/MODE to VDD puts the part in shutdown (IDD = 1.4μA).Note 5: This is the REF current needed to directly drive the end terminal of the gain-setting resistors when REFIN/MODE is con-nected to VSS to put the buffer in high-impedance mode. The REF input current is tested at the gain of 100. At gain 10 and
1000, IREF = ±100μA and 3.4μA, respectively at +25°C. See the Detailed Description.Note 6: Output swing high (VOH) and output swing low (VOL) are measured only on G = 100 and G = 1000 devices. Devices with G = 1 and G = 10 have output swing high limited by the range of VREF, VCM, and VDIFF (see the Output Swing section).Note 7: Maximum range for VDIFF is from -100mV to +100mV.
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = -40°C to +125°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
REFIN/MODE Input-Voltage
HighVIHMAX4208/MAX4209 in shutdownVDD - 0.2V
REFIN/MODE Buffer
Common-Mode Rejection Ratio
(VSS + 0.2V)≤ VREF ≤(VDD - 1.6V)
TA = +25°C to +85°C96
TA = -40°C to +125°C90
REF Common-Mode Range(Note 4)Guaranteed by REF CMRR testVSSVDD - 1.6V
REF Common-Mode Rejection
RatioVSS ≤ VREF ≤ (VDD - 1.6V)
TA = +25°C to +85°C96dB
TA = -40°C to +125°C90
REFIN/MODE Buffer
Power-Supply Rejection Ratio
VDD = 2.85V to 5.5V, VREFIN/MODE = VCM = (VSS + 0.5V)
TA = +25°C to +85°C96
TA = -40°C to +125°C90
OUTPUT DC CHARACTERISTICS
Output Voltage Swing (Note 6)
VOHVDD - VOUT
RL = 100kΩ60
RL = 10kΩ90
RL = 1kΩ375
VOLVOUT - VSS
RL = 100kΩ50
RL = 10kΩ75
RL = 1kΩ325
POWER SUPPLY
Supply VoltageVDDGuaranteed by PSRR test2.855.50V
Supply Current
VREFIN/MODE = VSS,
buffer OFFVDD = 5V1.70(VSS + 0.2V) ≤ VREFIN/MODE ≤ (VDD - 1.6V), buffer ONVDD = 5V3.0
REFIN/MODE = VDD, shutdown mode10µA
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Electrical Characteristics (continued)
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.)
OFFSET VOLTAGE DRIFT HISTOGRAM
(TA = -20°C TO +85°C)
MAX4208/9 toc02
VOS DRIFT (nV/°C)
FREQUENCY (%)50100150200250300
GAIN ACCURACY HISTOGRAM
MAX4208/9 toc03
GAIN ACCURACY (%)
FREQUENCY (%)
AV = +100V/V
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
MAX4208/9 toc04
SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE (µV)
TA = -20°CTA = +25°CTA = +85°C
TA = -40°CTA = +125°C
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
MAX4208/9 toc05
INPUT COMMON-MODE VOLTAGE (V)
INPUT OFFSET VOLTAGE (µV)
TA = -20°CTA = +25°CTA = +85°C
TA = -40°CTA = +125°C
INPUT OFFSET VOLTAGE
vs. REFIN COMMON-MODE (BUFFER ENABLED)
MAX4208/9 toc06
REFIN COMMON-MODE (V)
INPUT OFFSET VOLTAGE (µV)
TA = -20°CTA = -40°CTA = +25°C
TA = +125°CTA = +85°C
LINEARITY ERROR
vs. DIFFERENTIAL INPUT VOLTAGE
MAX4208/9 toc07
LINEARITY ERROR (ppm)
AV = +100V/V
INPUT OFFSET VOLTAGE HISTOGRAM
MAX4208/9 toc01
INPUT OFFSET VOLTAGE (µV)
FREQUENCY (%)151050-5-10-15
AV = +100V/V
-201k10010k100k1M10M
GAIN vs. FREQUENCY
MAX4208/9 toc08
GAIN (dB)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX4208/9 toc09
CMRR (dB)
10k100k1k100
-1401M
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Typical Operating Characteristics
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4208/9 toc10
FREQUENCY (Hz)
GAIN (dB)
10k100k1k100
-1401M
SUPPLY CURRENT (BUFFER ON)
vs. SUPPLY VOLTAGE
MAX4208/9 toc15
IDD
(mA)
VREFIN/MODE = VDD/2
TA = -40°CTA = +25°CTA = +125°C
MAX4208 INPUT-REFERRED NOISE
MAX4208/9 toc11
1s/div
1.2µV/div
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX4208/9 toc16
IDD
(µA)
TA = -40°C
TA = +25°C
TA = +125°C
VREFIN/MODE = VDD
INPUT NOISE vs. FREQUENCY
MAX4208/9 toc12
FREQUENCY (Hz)
INPUT-NOISE DENSITY (nV/
Hz)
1001k
10,00010k100k
CFB = 1nF
CAPACITOR
CFB = 10nF
CAPACITOR
WHITE NOISE
140nV/Hz
IDD vs. VREFIN/MODE
MAX4208/9 toc13
VREFIN/MODE (V)
IDD
(mA)GREY = OUT OF
COMMON-MODE RANGE
INTERNAL BUFFER ON
VREFIN/MODE (VSS + 0.2V)
INTERNAL BUFFER OFF
VREFIN/MODE (VSS + 0.05V)
SHUTDOWN MODE
SUPPLY CURRENT (BUFFER OFF)
vs. SUPPLY VOLTAGE
MAX4208/9 toc14
VDD (V)
IDD
(µA)
VREFIN/MODE = VSS
TA = -40°CTA = +25°C
TA = +125°C
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Typical Operating Characteristics (continued)
(VDD = 5V, VSS = 0V, VCM = VREF = VDD/2, VREFIN/MODE = VSS, RL = 100kΩ to VDD/2, VDIFF = (VIN+ - VIN-) = 0V, MAX4208 set for G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), TA = +25°C, unless otherwise noted.)
LARGE-SIGNAL PULSE RESPONSE TIME
MAX4208/9 toc17
100µs/div
VIN+
5mV/div
OUTPUT
50mV/div
2.5V
2.5V
AV = 10V/V
VIN+ = 10mV STEP
VIN- = VREF = (VDD - VSS)/2
VREFIN/MODE = VSS
LARGE-SIGNAL PULSE RESPONSE TIME
MAX4208/9 toc18
400µs/div
VIN+
5mV/div
OUTPUT
500mV/div
2.5V
2.5V
AV = 100V/V
VIN+ = 10mV STEP
VIN- = VREF = (VDD - VSS)/2
VREFIN/MODE = VSS
LARGE-SIGNAL PULSE RESPONSE TIME
MAX4208/9 toc19
400µs/div
VIN+
1mV/div
OUTPUT
1V/div
2.5V
2.5V
AV = 1000V/V
VIN+ = 2mV STEP
VIN- = VREF = (VDD - VSS)/2
VREFIN/MODE = VSS
MAX4208/MAX4209Ultra-Low Offset/Drift, Precision Instrumentation Ampliiers with REF Buffer
Typical Operating Characteristics (continued)

Partno	Mfg	Dc	Qty	Available	Descript
MAX4208AUA+	N/A	N/a	2500	avai	Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
MAX4208AUA+T	N/A	N/a	2500	avai	Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer