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General Description
The MAX4475–MAX4478/MAX4488/MAX4489 wide-
band, low-noise, low-distortion operational amplifiers
offer rail-to-rail outputs and single-supply operation
down to 2.7V. They draw 2.2mA of quiescent supply
current per amplifier while featuring ultra-low distortion
(0.0002% THD+N), as well as low input voltage-noise
density (4.5nV/√Hz) and low input current-noise density
(0.5fA/√Hz). These features make the devices an ideal
choice for applications that require low distortion and/or
low noise.
For power conservation, the MAX4475/MAX4488 offer a
low-power shutdown mode that reduces supply current
to 0.01µA and places the amplifiers’ outputs into a high-
impedance state. These amplifiers have outputs which
swing rail-to-rail and their input common-mode voltage
range includes ground. The MAX4475–MAX4478 are
unity-gain stable with a gain-bandwidth product of
10MHz. The MAX4488/4489 are internally compensated
for gains of +5V/V or greater with a gain-bandwidth
product of 42MHz. The single MAX4475/MAX4476/
MAX4488 are available in space-saving, 6-pin SOT23
and TDFN packages.
Applications
ADC Buffers
DAC Output Amplifiers
Low-Noise Microphone/Preamplifiers
Digital Scales
Strain Gauges/Sensor Amplifiers
Medical Instrumentation
Features
♦ Low Input Voltage-Noise Density: 4.5nV/√Hz
♦ Low Input Current-Noise Density: 0.5fA/√Hz
♦ Low Distortion: 0.0002% THD+N (1kΩ load)
♦ Single-Supply Operation from +2.7V to +5.5V
♦ Input Common-Mode Voltage Range Includes
Ground
♦ Rail-to-Rail Output Swings with a 1kΩ Load
♦ 10MHz GBW Product, Unity-Gain Stable
(MAX4475–MAX4478)
♦ 42MHz GBW Product, Stable with A
V
≥ +5V/V
(MAX4488/MAX4489)
♦ Excellent DC Characteristics
V
OS
= 70µV
I
BIAS
= 1pA
Large-Signal Voltage Gain = 120dB
♦ Low-Power Shutdown Mode:
Reduces Supply Current to 0.01µA
Places Output in High-Impedance State
♦ Available in Space-Saving SOT23, TDFN, µMAX
®
,
and TSSOP Packages
MAX4475–MAX4478/MAX4488/MAX4489
SOT23, Low-Noise, Low-Distortion, Wide-Band,
Rail-to-Rail Op Amps
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
Selector Guide
19-2137; Rev 3; 9/05
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.
+Denotes lead-free package.
*EP = Exposed paddle (connect to V
SS
).
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4475AUT-T
-40°C to +125°C
6 SOT23-6
AAZV
MAX4475AUA
-40°C to +125°C
8 µMAX —
MAX4475ASA
-40°C to +125°C
8 SO —
MAX4475ATT+T
-40°C to +125°C 6 TDFN-EP*
+ADD
PART
G A IN B W
( M H z)
STABLE
GAIN
(V/V)
NO. OF
AMPS
SHDN
MAX4475
10 1 1 Yes
MAX4476
10 1 1 —
MAX4477
10 1 2 —
MAX4478
10 1 4 —
MAX4488
42 5 1 Yes
MAX4489
42 5 2 —
25
20
10
5
0
10 1k 10k100 100k
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
MAX4475 toc20
FREQUENCY (Hz)
15
V
IN
EQUIVALENT INPUT NOISE VOLTAGE (nV/√Hz)
Typical Operating Characteristic
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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