19-0265; Rev 2; 9/96
S in g le /Du a l/Qu a d , Mic ro p o w e r,
S in g le -S u p p ly Ra il-t o -Ra il Op Am p s
2/MAX495
_______________Ge n e ra l De s c rip t io n
The dual MAX492, quad MAX494, and single MAX495
operational amplifiers combine excellent DC accuracy
with rail-to-rail operation at the input and output. Since
____________________________Fe a t u re s
♦ Low-Voltage Single-Supply Operation (+2.7V to +6V)
♦ Rail-to-Rail Input Common-Mode Voltage Range
♦ Rail-to-Rail Output Swing
♦ 500kHz Gain-Bandwidth Product
♦ Unity-Gain Stable
♦ 150µA Max Quiescent Current per Op Amp
♦ No Phase Reversal for Overdriven Inputs
♦ 200µV Offset Voltage
♦ High Voltage Gain (108dB)
♦ High CMRR (90dB) and PSRR (110dB)
♦ Drives 1kΩ Load
♦ Drives Large Capacitive Loads
♦ MAX495 Available in µMAX Package—8-Pin SO
the common-mode voltage extends from V
to V ,
CC
EE
the devices can operate from either a single supply
(+2.7V to +6V) or split supplies (±1.35V to ±3V). Each
op amp requires less than 150µA supply current. Even
with this low current, the op amps are capable of driving
a 1kΩ load, and the input referred voltage noise is only
25nV/√Hz. In addition, these op amps can drive loads in
excess of 1nF.
The precision performance of the MAX492/MAX494/
MAX495, combined with their wide input and output
dynamic range, low-voltage single-supply operation, and
very low supply current, makes them an ideal choice for
battery-operated equipment and other low-voltage appli-
cations. The MAX492/MAX494/MAX495 are available in
DIP and SO packages in the industry-standard op-amp
pin configurations. The MAX495 is also available in the
smallest 8-pin SO: the µMAX package.
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 SO
MAX492CPA
MAX492CSA
MAX492C/D
MAX492EPA
MAX492ESA
MAX492MJA
0°C to +70°C
________________________Ap p lic a t io n s
Portable Equipment
0°C to +70°C
Dice*
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
8 Plastic DIP
8 SO
Battery-Powered Instruments
Data Acquisition
8 CERDIP
Signal Conditioning
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
Low-Voltage Applications
__________Typ ic a l Op e ra t in g Circ u it
_________________P in Co n fig u ra t io n s
TOP VIEW
+5V
OUT1
IN1-
V
1
2
3
4
8
7
6
5
CC
1
OUT2
IN2-
V
DD
IN1+
10k
6
MAX187
(ADC)
IN2+
V
EE
MAX492
2
3
7
6
8
7
DOUT
2
SERIAL
INTERFACE
DIP/SO
AIN
SCLK
CS
MAX495
4
ANALOG
INPUT
3
4
NULL
IN1-
N.C.
1
2
3
4
8
7
6
5
SHDN
REF
MAX495
10k
V
CC
4.096V
GND
5
OUT
IN1+
NULL
V
EE
DIP/SO/µMAX
INPUT SIGNAL CONDITIONING FOR LOW-VOLTAGE ADC
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800