MAX4122 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps

19-1087; Rev 1; 8/97
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply Rail-to-Rail I/O Op Amps
General Description
The MAX4122–MAX4129 family of operational amplifiers
combines wide bandwidth and excellent DC accuracy with
Rail-to-Rail^® operation at the inputs and outputs. These
devices require only 650µA per amplifier, and operate from
either a single supply (+2.7V to +6.5V) or dual supplies
(±1.35V to ±3.25V) with a common-mode voltage range
that extends 250mV beyond V_EE and V_CC. They are capa-
ble of driving 250Ω loads. The MAX4122/MAX4123/
MAX4126/MAX4127/MAX4129 have a 5MHz gain band-
width product, while the decompensated MAX4124/
MAX4125/MAX4128 (stable at closed-looped gains of
10 or greater) have a 25MHz gain bandwidth product. In
addition, the MAX4123/MAX4125/MAX4127 feature a
shutdown mode in which the outputs are placed in a
high-impedance state and the supply current is reduced
to only 25µA per amplifier.
With their rail-to-rail input common-mode range and
output swing, these amplifiers are ideal for low-voltage
single-supply operation. Although the minimum operat-
ing voltage is specified at 2.7V, the devices typically
operate down to 1.8V. In addition, low offset voltage
and high speed make them the ideal signal-condition-
ing stages for precision, low-voltage, data-acquisition
systems. The MAX4122 and MAX4124 come in the
space-saving 5-pin SOT23-5 package.
________________________Applications
Battery-Powered Instruments
Portable Equipment
Data-Acquisition Systems
Signal Conditioning
Low-Power, Low-Voltage Applications
Selection Table
PART
BW
(MHz)
MAX4122 5
MAX4123 5
MAX4124 25
MAX4125 25
MAX4126 5
MAX4127 5
MAX4128 25
MAX4129 5
AMPS
PER
PKG.
1
1
1
1
2
2
2
4
SHUT-
DOWN
MODE
—
Yes
—
Yes
—
Yes
—
—
PIN-
PACKAGE
5 SOT23-5
8 SO/µMAX
5 SOT23-5
8 SO/µMAX
8 SO/µMAX
14 SO
8 SO/µMAX
14 SO
Features
o 5-Pin SOT23 Package (MAX4122/4)
o +2.7V to +6.5V Single-Supply Operation
o Rail-to-Rail Input Common-Mode Voltage Range
o Rail-to-Rail Output Voltage Swing
o 5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9)
25MHz Gain-Bandwidth Product (MAX4124/5/8)
o 650µA Quiescent Current per Amplifier
o 25µA Shutdown Function (MAX4123/5/7)
o 200µV Offset Voltage
o No Phase Reversal for Overdriven Inputs
o Drive 250Ω Loads
o Stable with 500pF Capacitive Loads
o Unity-Gain Stable (MAX4122/3/6/7/9)
Stable at Gains ≥ 10V/V (MAX4124/5/8)
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
MARKING
INFO.
MAX4122EUK -40°C to +85°C 5 SOT23-5
AAAZ
MAX4123C/D 0°C to +70°C Dice*
—
MAX4123ESA -40°C to +85°C 8 SO
—
MAX4123EUA -40°C to +85°C 8 µMAX
—
Ordering Information continued at end of data sheet.
*Dice are specified at T_A = +25°C, DC parameters only.
Pin Configurations appear at end of data sheet.
__________Typical Operating Circuit
+5V
SERIAL
INTERFACE
MAX187
3 _SHDN
V_DD ¹
6 _DOUT
AIN ²
8 _SCLK
VREF ⁴
7 _CS
GND ⁵
MAX4123
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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