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General Description
The MAX4249–MAX4257 low-noise, low-distortion oper-
ational amplifiers offer rail-to-rail outputs and single-
supply operation down to 2.4V. They draw 400µA of
quiescent supply current per amplifier while featuring
ultra-low distortion (0.0002% THD), as well as low input
voltage-noise density (7.9nV/√Hz) and low input
current-noise density (0.5fA/√Hz). These features make
the devices an ideal choice for portable/battery-powered
applications that require low distortion and/or low noise.
For additional power conservation, the MAX4249/
MAX4251/MAX4253/MAX4256 offer a low-power shut-
down mode that reduces supply current to 0.5µA and
puts the amplifiers’ outputs into a high-impedance
state. The MAX4249-MAX4257’s outputs swing rail-to-
rail and their input common-mode voltage range
includes ground. The MAX4250–MAX4254 are unity-
gain stable with a gain-bandwidth product of 3MHz.
The MAX4249/MAX4255/MAX4256/MAX4257 are inter-
nally compensated for gains of 10V/V or greater with a
gain-bandwidth product of 22MHz. The single MAX4250/
MAX4255 are available in space-saving 5-pin SOT23
packages. The MAX4252 is available in an 8-bump chip-
scale package (UCSP™) and the MAX4253 is available in
a 10-bump UCSP. The MAX4250AAUK comes in a 5-pin
SOT23 package and is specified for operation over the
automotive (-40°C to +125°C) temperature range.
Applications
Wireless Communications Devices
PA Control
Portable/Battery-Powered Equipment
Medical Instrumentation
ADC Buffers
Digital Scales/Strain Gauges
Features
♦ Available in Space-Saving UCSP, SOT23, and
µMAX
®
Packages
♦ Low Distortion: 0.0002% THD (1kΩ load)
♦ 400µA Quiescent Supply Current per Amplifier
♦ Single-Supply Operation from 2.4V to 5.5V
♦ Input Common-Mode Voltage Range Includes
Ground
♦ Outputs Swing Within 8mV of Rails with a 10kΩ
Load
♦ 3MHz GBW Product, Unity-Gain Stable
(MAX4250–MAX4254)
22MHz GBW Product, Stable with A
V
≥ 10V/V
(MAX4249/MAX4255/MAX4256/MAX4257)
♦ Excellent DC Characteristics
V
OS
= 70µV
I
BIAS
= 1pA
Large-Signal Voltage Gain = 116dB
♦ Low-Power Shutdown Mode
Reduces Supply Current to 0.5µA
Places Outputs in a High-Impedance State
♦ 400pF Capacitive-Load Handling Capability
MAX4249–MAX4257
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
________________________________________________________________ Maxim Integrated Products 1
19-1295; Rev 7; 4/05
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.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
UCSP is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.
A
B
C
12 3
OUTA
V
DD
OUTB
INA-
INB-
INB+
V
SS
INA+
MAX4252
OUTA
V
DD
OUTB
INA-
INB-
INA+
INB+
V
SS
SHDNA
SHDNB
MAX4253
C1
B1
A1
A2
A3
A4
B4
C2 C3
C4
TOP VIEW
(BUMPS ON BOTTOM)
UCSP
UCSP
Pin Configurations continued at end of data sheet.
Pin Configurations
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4249ESD
-40°C to +85°C
14 SO —
MAX4249EUB
-40°C to +85°C
10 µMAX —
MAX4250EUK-T
-40°C to +85°C
5 SOT23-5
ACCI
M AX 4250AAU K- T
- 40°C to + 125°C
5 SOT23-5
AEYJ
