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MAX6220ASA-2.5 |MAX6220ASA25MAXIMN/a23avaiLow-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference
MAX6220ASA-5.0 |MAX6220ASA50MAXIMN/a164avaiLow-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference


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MAX6220ASA-2.5-MAX6220ASA-5.0
Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference
General Description
The MAX6220 is a low-noise, precision voltage refer-
ence with extremely low 20ppm/°C temperature coeffi-
cient over the automotive temperature range (-40°C to
+125°C) and excellent ±0.1% initial accuracy. This
device features buried-zener technology for low noise
performance. The load-regulation specification is guar-
anteed for source and sink currents up to 15mA.
Excellent line and load regulation and low output
impedance at high frequency make the MAX6220 ideal
for high-resolution data-conversion systems up to
16 bits. The MAX6220 is set for 2.5V, 4.096V, and
5.0V outputs.
Applications

High-Accuracy Industrial and Process Control
ATE Equipment
Precision Current Sources
Features
Low 20ppm/°C Temperature Coefficient over
-40°Cto +125°C Range
Very Low 1.5µVp-p Noise (0.1Hz to 10Hz)±0.1% Initial Accuracy±15mA Output Source and Sink Current8V to 40V Input Voltage RangeOptional Noise Reduction and Voltage TrimExcellent Transient ResponseLow 20ppm/1000hr Long-Term StabilityStable for All Capacitive Loads
MAX6220
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference

REFERENCE OUT
GND
*OPTIONAL (STABLE WITH ALL CAPACITIVE LOADS)
TRIM
OUT
8V TO 40V INPUT2.2μF2.2μFMAX6220
Typical Operating Circuit

OUTNR
TRIMGND
I.C.
I.C.IN
I.C.
SOIC

TOP VIEW
MAX6220
Pin Configuration

19-1930; Rev 0; 4/01
PARTTEMP. RANGEPIN-
PACKAGE
OUPUT
VOLTAGE
(V)

MAX6220ASA25-40°C to +125°C8 SO2.5
MAX6220ASA41-40°C to +125°C8 SO4.096
MAX6220ASA50-40°C to +125°C8 SO5.0
Ordering Information
MAX6220
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—(+2.5V)

(VIN= +10V, IOUT= 0mA, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
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.
(Voltages Referenced to GND)
IN..............................................................................-0.3V to +42V
OUT, TRIM...............................................................-0.3V to +12V..............................................................................-0.3V to +6V
OUT Short-Circuit to GND Duration (VIN≤12V)..........Continuous
OUT Short-Circuit to GND Duration (VIN≤42V)........................5s
OUT Short-Circuit to IN Duration (VIN≤12V)..............Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)....................471mW
Operating Temperature Range...........................-40°C to +125°C
Storage Temperature Range..............................-65°C to +150°C
Lead Temperature (soldering, 10s)...................................+300°C
PARAMETERSYMBOLCONDITIONSTAMINTYPMAXUNITS

Input Voltage RangeVIN840V
Output VoltageVOUT+25°C2.4972.5002.503V
Output Voltage Temperature
Coefficient (Note 1)TCVOUT220ppm/˚C
+25°C27Line Regulation (Note 2)ΔVOUT/
ΔVIN8V ≤ VIN ≥ 40V45ppm/V
+25°C16Sourcing: 0mA ≤ IOUT ≤ 15mA15
+25°C16Load Regulation (Note 2)ΔVOUT/
ΔIOUTSinking: -15mA ≤ IOUT ≤ 0mA30
ppm/mA
+25°C1.82.9Supply CurrentIIN3.3mA
Trim-Adjustment RangeΔVOUT(Figure 1)±15±25mV
Turn-On Settling TimetONTo ±0.01% of final value5µs
0.1Hz ≤ f ≥ 10Hz1.5µVp-pOutput Noise Voltage
(Note 3)eN10Hz ≤ f ≥ 1kHz1.32.8µVRMS
Temperature Hysteresis(Note 4)20ppm
Long-Term StabilityΔVOUTΔt = 1000hr20ppm
MAX6220
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
ELECTRICAL CHARACTERISTICS—(+4.096V)

(VIN= +10V, IOUT= 0mA, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSTAMINTYPMAXUNITS

Input Voltage RangeVIN840V
Output VoltageVOUT+25°C4.0924.0964.100V
Output VoltageTemperature
Coefficient (Note 1)TCVOUT220ppm/°C
+25°C27Line Regulation (Note 2)ΔVOUT/
ΔVIN8V ≤ VIN ≥ 40V45ppm/V
+25°C16Sourcing: 0mA ≤ IOUT ≤ 15mA15
+25°C16Load Regulation (Note 2)ΔVOUT/
ΔIOUTSinking: -15mA ≤ IOUT ≤ 0mA30
ppm/mA
+25°C1.93.1Supply CurrentIIN3.5mA
Trim-Adjustment RangeΔVOUT(Figure 1)±24±40mV
Turn-On Settling TimetONTo ±0.01% of final value5µs
0.1Hz ≤ f ≥ 10Hz2.4µVp-pOutput Noise Voltage
(Note 3)eN10Hz ≤ f ≥ 1kHz2.04.0µVRMS
Temperature Hysteresis(Note 4)20ppm
Long-Term StabilityΔVOUTΔt = 1000hr20ppm
MAX6220
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
ELECTRICAL CHARACTERISTICS—(+5.0V)

(VIN= +10V, IOUT= 0mA, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1:
Temperature coefficient is measured by the box method; i.e., the maximum ΔVOUTis divided by ΔT x VOUT.
Note 2:
Line regulation (ΔVOUT/ (VOUTx ΔVIN)) and load regulation (ΔVOUT/ (VOUTx ΔIOUT)) are measured with pulses and do
not include output voltage changes due to die-temperature changes.
Note 3:
Noise specifications are guaranteed by design.
Note 4:
Temperature hysteresis is specified at TA= +25°C by measuring VOUTbefore and after changing temperature by +25°C.
PARAMETERSYMBOLCONDITIONSTAMINTYPMAXUNITS

Input Voltage RangeVIN840V
Output VoltageVOUT+25°C4.9955.0005.005V
Output Voltage Temperature
Coefficient (Note 1)TCVOUT220ppm/°C
+25°C27Line Regulation (Note 2)ΔVOUT/
ΔVIN8V ≤ VIN ≥ 40V45ppm/V
+25°C16Sourcing: 0mA ≤ IOUT ≤ 15mA15
+25°C16Load Regulation (Note 2)ΔVOUT/
ΔIOUTSinking: -15mA ≤ IOUT ≤ 0mA30
ppm/mA
+25°C2.03.3Supply CurrentIIN3.7mA
Trim-Adjustment RangeΔVOUT(Figure 1)±30±50mV
Turn-On Settling TimetONTo ±0.01% of final value5µs
0.1Hz ≤ f ≥ 10Hz3.0µVp-pOutput Noise Voltage
(Note 3)eN10Hz ≤ f ≥ 1kHz2.55.0µVRMS
Temperature Hysteresis(Note 4)20ppm
Long-Term StabilityΔVOUTΔt = 1000hr20ppm
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
MAX6220
Typical Operating Characteristics

(VIN= +10V, IOUT= 0mA, TA = +25°C, unless otherwise noted.)
MAX6220_50
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX6220 toc01
TEMPERATURE (°C)
OUT
(mV)
OUT
(ppm)105-3558545125
CHANGE IN OUTPUT VOLTAGE
vs. INPUT VOLTAGE
VIN (V)
OUT
(ppm)
MAX6220
toc07
MAX6220_41
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX6220 toc02
TEMPERATURE (°C)
OUT
(mV)
OUT
(ppm)105-3558545125
MAX6220_25
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX6220 toc03
TEMPERATURE (°C)
OUT
(mV)
OUT
(ppm)105-3558545125
MAX6220_25
CHANGE IN OUTPUT VOLTAGE
vs. OUTPUT CURRENT
MAX6220
toc06
IOUT (mA)
OUT
TA = +85°C
TA = -40°CTA = +25°C
MAX6220_41
CHANGE IN OUTPUT VOLTAGE
vs. OUTPUT CURRENT
MAX6220
toc05
IOUT (mA)
OUTTA = +25°C
TA = -40°C
TA = +85°C
MAX6220_50
CHANGE IN OUTPUT VOLTAGE
vs. OUTPUT CURRENT
MAX6220
toc04
IOUT (mA)
OUT
TA = +25°C
TA = -40°CTA = +85°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6220
toc08
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
MAX6220_25MAX6220_41
MAX6220_50
SUPPLY CURRENT vs. TEMPERATURE
MAX6220
toc09
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
MAX6220_41
MAX6220_50
MAX6220_25
MAX6220
Low-Noise, Precision, +2.5V/+4.096V/+5V
Voltage Reference
Typical Operating Characteristics (continued)

(VIN= +10V, IOUT= 0mA, TA = +25°C, unless otherwise noted.)
MAX6220_41
0.1Hz TO 10Hz NOISE

OUT
, 1
V/div
MAX6220 toc14
1s/div
COUT = CNR = 0μF1001k10k
MAX6220_25
OUTPUT NOISE-VOLTAGE
DENSITY vs. FREQUENCY

MAX6220
toc10
FREQUENCY (Hz)
CNR = 0μF
CNR = 1μF
OUTPUT NOISE DENSITY (nV/
Hz)
MAX6220_25
0.1Hz TO 10Hz NOISE

OUT
, 0.5
V/div
MAX6220 toc13
1s/div
COUT = CNR = 0μF1001k10k
MAX6220_41
OUTPUT NOISE-VOLTAGE
DENSITY vs. FREQUENCY

MAX6220
toc11
FREQUENCY (Hz)
CNR = 0μF
CNR = 1μF
OUTPUT NOISE DENSITY (nV/
Hz)
1001001k10k
MAX6220_50
OUTPUT NOISE-VOLTAGE
DENSITY vs. FREQUENCY

MAX6220
toc12
FREQUENCY (Hz)
CNR = 0μF
CNR = 1μF
OUTPUT NOISE DENSITY (nV
Hz)
MAX6220_50
0.1Hz TO 10Hz NOISE

OUT
, 1
V/div
1s/div
COUT = CNR = 0μF
MAX6220 toc151M10k
FREQUENCY (Hz)
1001k100k
OUTPUT IMPEDANCE vs. FREQUENCY
MAX6220
toc16
OUTPUT IMPEDANCE (
ISINK = 5mA
ISOURCE = 5mA60
1201001k10k
RIPPLE REJECTION
vs. FREQUENCY (CNR = 1μF)

MAX6220
toc17
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
MAX6220_41
MAX6220_25
MAX6220_501001k10k
RIPPLE REJECTION
vs. FREQUENCY (CNR = 0μF)

MAX6220
toc18
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
MAX6220_25MAX6220_41
MAX6220_50
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