19-1295; Rev 3; 8/01
UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
General Description
Features
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.
ꢀ 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
For additional power conservation, the MAX4249/4251/
4253/4256 offer a low-power shutdown mode that
reduces supply current to 0.5µA and puts the ampli-
fiers’ 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 internally compen-
sated for gains of +10V/V or greater with a gain-band-
width product of 22MHz. The single MAX4250/
MAX4255 are available in space-saving, 5-pin SOT23
packages. The MAX4252 is available in an 8-pin UCSP
package and the MAX4253 is available in a 10-pin
UCSP package.
Load
ꢀ 3MHz GBW Product, Unity-Gain Stable
(MAX4250–MAX4254)
22MHz GBW Product, Stable with A ≥ 10V/V
(MAX4249/MAX4255/MAX4256/MAX4257)
V
ꢀ Excellent DC Characteristics
V
OS
= 70µV
= 1pA
I
BIAS
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
Applications
Wireless Communications Devices
PA Control
Ordering Information
PIN/BUMP-
PACKAGE
TOP
MARK
PART
TEMP. RANGE
Portable/Battery-Powered Equipment
Medical Instrumentation
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
14 SO
—
—
MAX4249ESD
MAX4249EUB
MAX4250EUK-T
10 µMAX
5 SOT23-5
ADC Buffers
ACCI
Digital Scales/Strain Gauges
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
MAX4253
MAX4252
2
1
3
A4
A2
A3
A1
OUTB
INB-
INB+
V
A
B
C
OUTB
OUTA
DD
SHDNB
B4
B1
INA-
INA+
V
DD
INB-
INB+
V
SS
C4
C1
C2
C3
V
SS
INA-
INA+
OUTA
SHDNA
UCSP
UCSP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.