19-2424; Rev 1; 12/02
Ultra-Low Offset/Drift, Low-Noise,
Precision SOT23 Amplifiers
General Description
The MAX4238/MAX4239 are low-noise, low-drift, ultra-
high 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
庐
outputs, operate from a
single 2.7V to 5.5V supply, and consume only 600碌A.
An active-low shutdown mode decreases supply cur-
rent to 0.1碌A.
The MAX4238 is unity-gain stable with a gain-band-
width product of 1MHz, while the decompensated
MAX4239 is stable with A
V
鈮?/div>
10V/V and a GBWP of
6.5MHz. The MAX4238/MAX4239 are available in 8-pin
narrow SO and 6-pin SOT23 packages.
o
Ultra-Low, 0.1碌V Offset Voltage
2.0碌V (max) at +25掳C
2.5碌V (max) at -40掳C to +85掳C
3.5碌V (max) at -40掳C to +125掳C
o
Low 10nV/
o
C Drift
o
Specified over the -40
o
C to +125
o
C Automotive
Temperature Range
o
Low Noise: 1.5碌V
P-P
from DC to 10Hz
o
150dB A
VOL
, 140dB PSRR, 140dB CMRR
o
High Gain-Bandwidth Product
1MHz (MAX4238)
6.5MHz (MAX4239)
o
0.1碌A Shutdown Mode
o
Rail-to-Rail Output (R
L
= 1k鈩?
o
Low 600碌A Supply Current
o
Ground-Sensing Input
o
Single 2.7V to 5.5V Supply Voltage Range
o
Available in a Space-Saving 6-Pin SOT23 Package
Features
MAX4238/MAX4239
Applications
Thermocouples
Strain Gauges
Electronic Scales
Medical Instrumentation
Instrumentation Amplifiers
Typical Application Circuit
PART
5V
Ordering Information
TEMP RANGE
-40
o
C to +125
o
C
-40
o
C to +125
o
C
-40 C to +125 C
-40 C to +125 C
o
o
o
o
PIN-
PACKAGE
6 SOT23-6
8 SO
6 SOT23-6
8 SO
TOP
MARK
AAZZ
鈥?/div>
ABAA
鈥?/div>
MAX4238AUT-T
18k鈩?/div>
360鈩?/div>
STRAIN GUAGE
ADC
A
V
= 100
AIN
MAX4238ASA
MAX4239AUT-T
MAX4239ASA
18k鈩?/div>
MAX4238/
MAX4239
Selector Guide
PART
MAX4238
MAX4239
MINIMUM STABLE
GAIN
1V/V
10V/V
GAIN
BANDWIDTH
(MHz)
1
6.5
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations appear at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
MAX4238 PDF文件相关型号
MAX4238ASA,MAX4238AUT-T,MAX4239,MAX4239ASA,MAX4239AUT-T
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