MAXIM MAX4239AUT-T

19-2424; Rev 1; 12/02
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
Applications
Features
♦ Ultra-Low, 0.1µV Offset Voltage
2.0µV (max) at +25°C
2.5µV (max) at -40°C to +85°C
3.5µV (max) at -40°C to +125°C
♦ Low 10nV/oC Drift
♦ Specified over the -40oC to +125oC Automotive
Temperature Range
♦ Low Noise: 1.5µVP-P from DC to 10Hz
♦ 150dB AVOL, 140dB PSRR, 140dB CMRR
♦ High Gain-Bandwidth Product
1MHz (MAX4238)
6.5MHz (MAX4239)
♦ 0.1µA Shutdown Mode
Thermocouples
♦ Rail-to-Rail Output (RL = 1kΩ)
Strain Gauges
♦ Low 600µA Supply Current
Electronic Scales
♦ Ground-Sensing Input
Medical Instrumentation
♦ Single 2.7V to 5.5V Supply Voltage Range
Instrumentation Amplifiers
♦ Available in a Space-Saving 6-Pin SOT23 Package
Ordering Information
Typical Application Circuit
PART
TEMP RANGE
PINPACKAGE
TOP
MARK
MAX4238AUT-T
-40oC to +125oC
6 SOT23-6
AAZZ
MAX4238ASA
-40oC to +125oC
8 SO
MAX4239AUT-T
-40oC to +125oC
6 SOT23-6
MAX4239ASA
-40oC to +125oC
8 SO
5V
18kΩ
360Ω
STRAIN GUAGE
ADC
AV = 100
18kΩ
—
ABAA
—
AIN
MAX4238/
MAX4239
Selector Guide
PART
MAX4238
MAX4239
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MINIMUM STABLE
GAIN
1V/V
10V/V
GAIN
BANDWIDTH
(MHz)
1
6.5
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4238/MAX4239
General Description
The MAX4238/MAX4239 are low-noise, low-drift, ultrahigh precision amplifiers that offer near-zero DC offset
and drift through the use of patented autocorrelating
zeroing techniques. This method constantly measures
and compensates the input offset, eliminating drift over
time and temperature and the effect of 1/f noise. Both
devices feature Rail-to-Rail® outputs, operate from a
single 2.7V to 5.5V supply, and consume only 600µA.
An active-low shutdown mode decreases supply current to 0.1µA.
The MAX4238 is unity-gain stable with a gain-bandwidth product of 1MHz, while the decompensated
MAX4239 is stable with AV ≥ 10V/V and a GBWP of
6.5MHz. The MAX4238/MAX4239 are available in 8-pin
narrow SO and 6-pin SOT23 packages.
MAX4238/MAX4239
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (VCC to GND).......................................6V
All Other Pins .................................(GND - 0.3V) to (VCC + 0.3V)
Output Short-Circuit Duration
(OUT shorted to VCC or GND) ...............................Continuous
Continuous Power Dissipation (TA = +70°C)
6-Pin Plastic SOT23 (derate 9.1mW/°C above +70°C).727mW
8-Pin Plastic 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
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
(2.7V ≤ V CC ≤ 5.5V, V CM = GND = 0V, V OUT = V CC /2, R L = 10kΩ connected to V CC /2, SHDN = V CC , T A = +25 ° C,
unless otherwise noted.)
PARAMETER
Input Offset Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.1
2
µV
VOS
(Note 1)
50
nV/1000hr
IB
(Note 2)
1
pA
Input Offset Current
IOS
(Note 2)
2
pA
Input Noise Voltage
enP-P
Long-Term Offset Drift
Input Bias Current
Common-Mode Input
Voltage Range
VCM
RS = 100Ω, 0.01Hz to 10Hz
1.5
Inferred from CMRR test
GND
- 0.1
µVP-P
VCC 1.3
V
Common-Mode Rejection Ratio
CMRR
-0.1V ≤ VCM ≤ VCC - 1.3V (Note 1)
120
140
dB
Power-Supply Rejection Ratio
PSRR
2.7V ≤ VCC ≤ 5.5V (Note 1)
120
140
dB
Large-Signal Voltage Gain
AVOL
0.05V ≤ VOUT ≤ VCC - 0.05V
(Note 1)
RL = 10kΩ
125
150
0.1V ≤ VOUT ≤ VCC - 0.1V
(Note 1)
RL = 1kΩ
125
145
RL = 10kΩ
Output Voltage Swing
VOH/VOL
RL = 1kΩ
dB
VCC - VOH
VOL
4
10
35
50
VOL
35
50
To either supply
Output Leakage Current
0 ≤ VOUT ≤ VCC, SHDN = GND (Note 2)
Gain-Bandwidth Product
Minimum Stable Closed-Loop
Gain
2
GBWP
40
0.01
VCC = 5V, CL = 100pF,
VOUT = 2V step
MAX4238
0.35
MAX4239
1.6
RL = 10kΩ, CL = 100pF,
measured at f = 100kHz
MAX4238
1
MAX4239
6.5
RL = 10kΩ, CL = 100pF,
phase margin = 60o
10
VCC - VOH
Output Short-Circuit Current
Slew Rate
4
MAX4238
1
MAX4239
10
_______________________________________________________________________________________
mV
mA
1
µA
V/µs
MHz
V/V
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
(2.7V ≤ V CC ≤ 5.5V, V CM = GND = 0V, V OUT = V CC /2, R L = 10kΩ connected to V CC /2, SHDN = V CC , T A = +25 ° C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
RL = 10kΩ, CL = 100pF,
phase margin = 60o
Maximum Closed-Loop Gain
Settling Time
-1V step
AV = 10
(Note 4)
Overload Recovery Time
Startup Time
AV = 10
MIN
MAX4238
1000
MAX4239
6700
0.1% (10 bit)
0.5
0.025% (12 bit)
1.0
0.006% (14 bit)
0.0015% (16
1.7
2.3
0.1% (10 bit)
3.3
0.025% (12 bit)
4.1
0.006% (14 bit)
0.0015% (16
4.9
5.7
0.1% (10 bit)
1.8
0.025% (12 bit)
2.6
0.006% (14 bit)
3.4
0.0015% (16
Supply Voltage Range
VCC
Supply Current
ICC
Shutdown Logic High
VIH
Shutdown Logic Low
VIL
Shutdown Input Current
TYP
Inferred by PSRR test
MAX
V/V
ms
ms
ms
4.3
2.7
5.5
SHDN = VCC, no load, VCC = 5.5V
600
850
SHDN = GND, VCC = 5.5V
0.1
1
2.2
0V ≤ V SHDN ≤ VCC
UNITS
V
µA
V
0.1
0.8
V
1
µA
_______________________________________________________________________________________
3
MAX4238/MAX4239
ELECTRICAL CHARACTERISTICS (continued)
MAX4238/MAX4239
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
ELECTRICAL CHARACTERISTICS
(2.7V ≤ VCC ≤ 5.5V, VCM = GND = 0V, VOUT = VCC/2, RL = 10kΩ connected to VCC/2, SHDN = VCC, TA = -40°C to +125°C, unless otherwise noted.) (Note 5)
PARAMETER
Input Offset Voltage
Input Offset Drift
Common-Mode Input Voltage
Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Large-Signal Voltage Gain
SYMBOL
CONDITIONS
VOS
(Note 1)
TCVOS
(Note 1)
VCM
CMRR
PSRR
10
GND 0.05
2.7V ≤ VCC ≤ 5.5V (Note 1)
120
RL = 10kΩ,
TA = -40°C to +85°C
0.1V ≤ VOUT
≤ VCC - 0.1V
TA = -40°C to +125°C
(Note 1)
125
VOH/VOL
RL = 1kΩ
Supply Voltage Range
VCC
Supply Current
ICC
Shutdown Logic High
VIH
Shutdown Logic Low
VIL
µV
nV/°C
VCC 1.4
V
dB
dB
dB
95
0.1V ≤ VOUT ≤ VCC - 0.1V,
TA = -40°C to +85°C
120
0.2V ≤ VOUT ≤ VCC - 0.2V,
TA = -40°C to +125°C
80
dB
VCC - VOH
20
VOL
20
VCC - VOH
100
Inferred by PSRR test
UNITS
90
mV
100
VOL
0V ≤ VOUT ≤ VCC, SHDN = GND (Note
Output Leakage Current
Shutdown Input Current
3.5
115
RL = 10kΩ
MAX
TA = -40°C to +125°C
GND - 0.05V ≤ TA = -40°C to +85°C
VCM ≤ VCC 1.4V (Note 1) TA = -40°C to +125°C
AVOL
TYP
2.5
Inferred from CMRR test
RL = 1kΩ
(Note 1)
Output Voltage Swing
MIN
TA = -40°C to +85°C
2.7
SHDN = VCC, no load, VCC = 5.5V
2
µA
5.5
V
900
SHDN = GND, VCC = 5.5V
2
2.2
0V ≤ V SHDN ≤ VCC
µA
V
0.7
V
2
µA
Note 1: Guaranteed by design. Thermocouple and leakage effects preclude measurement of this parameter during production
testing. Devices are screened during production testing to eliminate defective units.
Note 2: IN+ and IN- are gates to CMOS transistors with typical input bias current of 1pA. CMOS leakage is so small that it is
impractical to test and guarantee in production. Devices are screened during production testing to eliminate defective units.
Note 3: Leakage does not include leakage through feedback resistors.
Note 4: Overload recovery time is the time required for the device to recover from saturation when the output has been
driven to either rail.
Note 5: Specifications are 100% tested at TA = +25°C, unless otherwise noted. Limits over temperature are guaranteed by design.
4
_______________________________________________________________________________________
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
30
20
TA = +25°C
0
-1.5 -1.2 -0.9 -0.6 -0.3 0
TA = +25°C
TA = -40°C
0
-0.4
0.3 0.6 0.9 1.2 1.5
2.7
3.4
4.1
4.8
5.5
0.9
0
1.8
2.7
3.6
COMMON-MODE VOLTAGE (V)
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
MAX4238
GAIN AND PHASE vs. FREQUENCY (TA = +25°C)
0.20
VCC = 2.7V
0.15
VCC = 5V
0.10
MAX4238/39 toc05
0.25
0.35
0.30
OUTPUT LOW VOLTAGE (V)
MAX4238/39 toc04
VOH = VCC - VOUT
0.05
0.25
VCC = 2.7V
0.20
VCC = 5V
0.15
0.10
0.05
0
0
15
0
20
5
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
10k
100k
0.1k
20
1k
1M
10M
MAX4238/39 toc08
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
0.1k
1k
10k
100k
FREQUENCY (Hz)
10k
100k
1M
10M
FREQUENCY (Hz)
MAX4238
GAIN AND PHASE vs. FREQUENCY (TA = +125°C)
GAIN AND PHASE (dB/DEGREES)
MAX4238/39 toc07
MAX4238
GAIN AND PHASE vs. FREQUENCY (TA = -40°C)
FREQUENCY (Hz)
15
SINK CURRENT (mA)
SOURCE CURRENT (mA)
1k
10
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
1M
10M
MAX4239
GAIN AND PHASE vs. FREQUENCY (TA = +25°C)
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
MAX4238/39 toc09
10
GAIN AND PHASE (dB/DEGREES)
5
0
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
MAX4238/39 toc06
SUPPLY VOLTAGE (V)
GAIN AND PHASE (dB/DEGREES)
OFFSET VOLTAGE (µV)
0.30
0.1k
TA = +125°C
0.2
-0.2
-0.4
0
GAIN AND PHASE (dB/DEGREES)
TA = -40°C
-0.2
10
OUTPUT HIGH VOLTAGE (V)
0.2
MAX4238/39 toc03
TA = +125°C
OFFSET VOLTAGE (µV)
40
0.4
MAX4238/39 toc02
0.4
MAX4238/39 toc01
PERCENTAGE OF UNITS (%)
50
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
OFFSET VOLTAGE vs. SUPPLY VOLTAGE
OFFSET VOLTAGE (µV)
INPUT OFFSET DISTRIBUTION
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
0.1k
1k
10k
100k
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________
5
MAX4238/MAX4239
Typical Operating Characteristics
(VCC = 5V, VCM = 0V, RL = 10kΩ connected to VCC/2, SHDN = VCC, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = 5V, VCM = 0V, RL = 10kΩ connected to VCC/2, SHDN = VCC, TA = +25°C, unless otherwise noted.)
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
1k
10k
100k
1M
10M
SUPPLY CURRENT vs. SUPPLY VOLTAGE
TA = +125°C
500
VCC = 5V
AV = 1000V/V
CL = 100pF
RL = 10kΩ
0.1k
1k
MAx4238/39 toc12
600
SUPPLY CURRENT (µA)
MAX4238/39 toc11
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
TA = -40°C
400
TA = +25°C
300
200
100
0
10k
100k
1M
0
10M
1
2
3
5
FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX4238
LARGE-SIGNAL TRANSIENT RESPONSE
-20
-40
-20
-40
-80
IN
1V/div
-60
CMRR (dB)
-60
MAX4238/39 toc15
0
MAX4238/39 toc13
0
-80
-100
-100
-120
-120
-140
-140
OUT
1V/div
-160
-160
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
MAX4238
SMALL-SIGNAL TRANSIENT RESPONSE
MAX4239
SMALL-SIGNAL TRANSIENT RESPONSE
MAX4238/39 toc16
MAX4238/39 toc17
10µs/div
AV = 1V/V
RL = 2kΩ
CL = 100pF
OVERVOLTAGE RECOVERY TIME
MAX4238/39 toc18
IN
50mV/div
IN
50mV/div
0
IN
50mV/div
OUT
50mV/div
OUT
1V/div
OUT
500mV/div
0
10µs/div
10µs/div
AV = 1V/V
RL = 2kΩ
CL = 100pF
6
4
FREQUENCY (Hz)
MAX4238/39 toc14
0.1k
MAX4239
GAIN AND PHASE vs. FREQUENCY (TA = +125°C)
GAIN AND PHASE (dB/DEGREES)
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
MAX4238/39 toc10
GAIN AND PHASE (dB/DEGREES)
MAX4239
GAIN AND PHASE vs. FREQUENCY (TA = -40°C)
PSRR (dB)
MAX4238/MAX4239
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
AV = 10V/V
RL = 2kΩ
CL = 100pF
400µs/div
AV = 100V/V
RL = 10kΩ
VCC = 2.5V
VEE = -2.5V
_______________________________________________________________________________________
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
SHUTDOWN WAVEFORM
DC TO 10Hz NOISE
MAX4238/39 toc20
MAX4238/39 toc19
SHDN
2V/div
2µV/div
OUT
1V/div
OUT
10µs/div
1s/div
RL = 10kΩ
CL = 100pF
VCC = 2.5V
VEE = -2.5V
Pin Description
PIN
NAME
FUNCTION
SOT23
SO
1
6
OUT
Amplifier Output
2
4
GND
Ground
3
3
IN+
Noninverting Input
4
2
IN-
Inverting Input
5
1
SHDN
6
7
VCC
Positive Power Supply
N.C.
No Connection. Not internally
connected.
—
5, 8
Shutdown Input. Active low
shutdown, connect to VCC for
normal operation.
Detailed Description
The MAX4238/MAX4239 are high-precision amplifiers
that have less than 2.5µV of input-referred offset and
low 1/f noise. These characteristics are achieved
through a patented autozeroing technique that samples
and cancels the input offset and noise of the amplifier.
The pseudorandom clock frequency varies from 10kHz
to 15kHz, reducing intermodulation distortion present in
chopper-stabilized amplifiers.
Offset Error Sources
To achieve very low offset, several sources of error
common to autozero-type amplifiers need to be considered. The first contributor is the settling of the sampling
capacitor. This type of error is independent of inputsource impedance, or the size of the external gain-setting resistors. Maxim uses a patented design technique
to avoid large changes in the voltage on the sampling
capacitor to reduce settling time errors.
The second error contributor, which is present in both
autozero and chopper-type amplifiers, is the charge
injection from the switches. The charge injection
appears as current spikes at the input, and combined
with the impedance seen at the amplifier’s input, contributes to input offset voltage. Minimize this
feedthrough by reducing the size of the gain-setting
resistors and the input-source impedance. A capacitor
in parallel with the feedback resistor reduces the
amount of clock feedthrough to the output by limiting
the closed-loop bandwidth of the device.
The design of the MAX4238/MAX4239 minimizes the
effects of settling and charge injection to allow specification of an input offset voltage of 0.1µV (typ) and less
than 2.5µV over temperature (-40°C to +85°C).
1/f Noise
1/f noise, inherent in all semiconductor devices, is
inversely proportional to frequency. 1/f noise increases
3dB/octave and dominates amplifier noise at lower frequencies. This noise appears as a constantly changing
voltage in series with any signal being measured. The
MAX4238/MAX4239 treat 1/f noise as a slow varying
offset error, inherently canceling the 1/f noise.
_______________________________________________________________________________________
7
MAX4238/MAX4239
Typical Operating Characteristics (continued)
(VCC = 5V, VCM = 0V, RL = 10kΩ connected to VCC/2, SHDN = VCC, TA = +25°C, unless otherwise noted.)
MAX4238/MAX4239
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
Output Overload Recovery
Autozeroing amplifiers typically require a substantial
amount of time to recover from an output overload. This
is due to the time it takes for the null amplifier to correct
the main amplifier to a valid output. The MAX4238/
MAX4239 require only 3.3ms to recover from an output
overload (see Electrical Characteristics and Typical
Operating Characteristics).
Shutdown
The MAX4238/MAX4239 feature a low-power (0.1µA)
shutdown mode. When SHDN is pulled low, the clock
stops and the device output enters a high-impedance
state. Connect SHDN to VCC for normal operation.
Pin Configurations
TOP VIEW
MAX4238/
MAX4239
MAX4238/
MAX4239
SHDN 1
8
N.C.
IN- 2
7
VCC
3
6
OUT
GND 4
5
N.C.
IN+
OUT 1
6
VCC
GND 2
5
SHDN
IN+ 3
4
IN-
SO
SOT23
Applications Information
Minimum and Maximum Gain
Configurations
The MAX4238 is a unity-gain stable amplifier with a gainbandwidth product (GBWP) of 1MHz. The MAX4239 is
decompensated for a GBWP of 6.5MHz and is stable with
a gain of 10V/V. Unlike conventional operational amplifiers, the MAX4238/MAX4239 have a maximum gain
specification. To maintain stability, set the gain of the
MAX4238 between AV = 1000V/V to 1V/V, and set the
gain of the MAX4239 between AV = 6700V/V and 10V/V.
Chip Information
TRANSISTOR COUNT: 821
PROCESS: BiCMOS
ADC Buffer Amplifier
The low offset, fast settling time, and 1/f noise cancellation of the MAX4238/MAX4239 make these devices
ideal for ADC buffers. The MAX4238/MAX4239 are well
suited for low-speed, high-accuracy applications such
as strain gauges (see Typical Application Circuit).
Error Budget Example
When using the MAX4238/MAX4239 as an ADC buffer,
the temperature drift should be taken into account when
determining the maximum input signal. With a typical offset drift of 10nV/°C, the drift over a 10°C range is 100nV.
Setting this equal to 1/2LSB in a 16-bit system yields a
full-scale range of 13mV. With a single 2.7V supply, an
acceptable closed-loop gain is AV = 200. This provides
sufficient gain while maintaining headroom.
8
_______________________________________________________________________________________
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
6LSOT.EPS
_______________________________________________________________________________________
9
MAX4238/MAX4239
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
MAX
MIN
0.069
0.053
0.010
0.004
0.014
0.019
0.007
0.010
0.050 BSC
0.150
0.157
0.228
0.244
0.016
0.050
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.25
0.19
1.27 BSC
3.80
4.00
5.80
6.20
0.40
SOICN .EPS
MAX4238/MAX4239
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0 -8
A1
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PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
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Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.