MAX492 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps

19-0265; Rev 2; 9/96
Single/Dual/Quad, Micropower,
Single-Supply Rail-to-Rail Op Amps
_______________General Description
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
the common-mode voltage extends from V_CC to V_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.
________________________Applications
Portable Equipment
Battery-Powered Instruments
Data Acquisition
Signal Conditioning
Low-Voltage Applications
__________Typical Operating Circuit
____________________________Features
o Low-Voltage Single-Supply Operation (+2.7V to +6V)
o Rail-to-Rail Input Common-Mode Voltage Range
o Rail-to-Rail Output Swing
o 500kHz Gain-Bandwidth Product
o Unity-Gain Stable
o 150µA Max Quiescent Current per Op Amp
o No Phase Reversal for Overdriven Inputs
o 200µV Offset Voltage
o High Voltage Gain (108dB)
o High CMRR (90dB) and PSRR (110dB)
o Drives 1kΩ Load
o Drives Large Capacitive Loads
o MAX495 Available in µMAX Package—8-Pin SO
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX492CPA
0°C to +70°C
8 Plastic DIP
MAX492CSA
0°C to +70°C
8 SO
MAX492C/D
0°C to +70°C
Dice*
MAX492EPA
-40°C to +85°C
8 Plastic DIP
MAX492ESA
-40°C to +85°C
8 SO
MAX492MJA
-55°C to +125°C 8 CERDIP
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
_________________Pin Configurations
+5V
10k
ANALOG
INPUT
2
7
6
MAX495
3
4
10k
1
V_DD
MAX187
2 _AIN
(ADC)
DOUT ⁶
SCLK ⁸
CS ⁷
SERIAL
INTERFACE
SHDN ³
REF ⁴
GND
5
4.096V
TOP VIEW
OUT1 ₁
IN1- ₂
IN1+ 3
V_EE 4
MAX492
DIP/SO
8 VCC
7 ^OUT2
6 ^IN2-
5 ^IN2+
NULL ₁
IN1- ₂
IN1+ 3
V_EE 4
MAX495
8 N.C.
7 ^VCC
6 ^OUT
5 ^NULL
INPUT SIGNAL CONDITIONING FOR LOW-VOLTAGE ADC
DIP/SO/µMAX
Pin Configurations continued at end of data sheet.
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