19-5873; Rev 1; 8/11
EVALUATION KIT AVAILABLE
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
General Description
The MAX44260/MAX44261 offer a unique combination of
high speed, precision, low noise, and low-voltage opera-
tion making them ideally suited for a large number of
signal processing functions such as filtering and ampli-
fication of signals in portable and industrial equipment.
The amplifiers feature an input offset of less than 50FV
and a high-gain bandwidth product of 15MHz while
maintaining a low 1.8V supply rail. The devices’ rail-to-
rail input/outputs and low noise guarantee maximum
dynamic range in demanding applications such as 12- to
14-bit SAR ADC drivers. Unlike traditional rail-to-rail input
structures, input crossover distortion is absent due to an
optimized input stage with an ultra-quiet charge pump.
The MAX44260 includes a fast-power-on shutdown mode
for further power savings. The MAX44261 offers a unique
on-demand calibration pin where the user can invoke
self-trimming of the input offset voltage.
The family of parts operates from a supply range of 1.8V
to 5.5V over the -40NC to +125NC temperature range and
can operate down to 1.7V over the 0NC to +70NC tem-
perature range. The MAX44260/MAX44261 are available
in small, 6-pin SC70 packages. The MAX44260 is also
available in a 1mm x 1.5mm thin µDFN (ultra-thin LGA)
package.
Ordering Information
appears at end of data sheet.
Features
S
Low 1.8V Supply Rail Over the -40°C to +125°C
Range
1.7V Supply Rail Over the 0°C to +70°C Range
S
15MHz Unity-Gain Bandwidth
S
Low 12.7nV/√Hz Input Voltage-Noise Density
S
Low 1.2fA/√Hz Input Current-Noise Density
S
S
S
S
S
S
Low 50µV (max) V
OS
at +25°C
On-Demand V
OS
Self-Calibration (MAX44261)
500fA Low Input Bias Current
750µA Quiescent Current per Amplifier
< 1µA Supply Current in Shutdown
Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin
µDFN (MAX44260) Packages
S
Low 110dB Total Harmonic Distortion
Applications
Notebooks
3G/4G Handsets
Portable Media Players
Portable Medical Instruments
Battery-Operated Devices
Analog-to-Digital Converter Buffers
Transimpedance Amplifiers
General-Purpose Signal Processing
Typical Application Circuit
15nF
+3.3V
2.4kI
22kI
330pF
MAX44260
10kI
3.3nF
ADC
MAX11645
CORNER FREQUENCY = 10kHz
SALLEN-KEY FILTER
For related parts and recommended products to use with this part, refer to:
www.maxim-ic.com/MAX44260.related
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Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
ABSOLUTE MAXIMUM RATINGS
IN+, IN-, OUT .................................(V
SS
- 0.3V) to (V
DD
+ 0.3V)
V
DD
to V
SS
...............................................................-0.3V to +6V
SHDN, CAL
.............................................................-0.3V to +6V
Output to Short-Circuit Ground Duration .............................. 10s
Continuous Input Current into Any Pin ............................
Q20mA
Continuous Power Dissipation (T
A
= +70NC)
SC70 (derate 3.1mW/NC above +70NC) ......................245mW
6-Pin Thin µDFN (Ultra-Thin LGA)
(derate 2.1mW/NC above +70NC) .............................110.2mW
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature .....................................................+150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
SC70
Junction-to-Ambient Thermal Resistance (B
JA
) .... 326.5NC/W
Junction-to-Case Thermal Resistance (B
JC
) .............115NC/W
Thin µDFN (Ultra-Thin LGA)
Junction-to-Ambient Thermal Resistance (B
JA
) ....... 470NC/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(V
DD
= 3.3V, V
SS
= 0V, V
IN+
= V
IN-
= V
DD
/2, RL = 10kI to V
DD
/2, V
CAL
= V
SHDN
= V
DD
, T
A
= -40NC to +125NC. Typical values are
at T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
DC CHARACTERISTICS
Input Voltage Range
V
IN+
V
IN-
Guaranteed by CMRR test
T
A
= +25NC
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Capacitance
Common-Mode Rejection Ratio
Open-Loop Gain
Output Short-Circuit Current
V
OS
V
OS
- TC
T
A
= +25NC
I
B
C
IN
CMRR
A
OL
I
SC
V
CM
= -0.1V to (V
DD
+ 0.1V)
0.4V
P
V
OUT
P
V
DD
- 0.4V, R
OUT
= 10kI
0.4V
P
V
OUT
P
V
DD
- 0.4V, R
OUT
= 600I
0.4V
P
V
OUT
P
V
DD
- 0.4V, R
OUT
= 32I
To V
DD
or V
SS
75
100
91
T
A
= -40NC to +85NC
T
A
= -40NC to +125NC
4
90
115
100
80
50
mA
dB
T
A =
-40°C to +125°C after calibration
T
A
= -40°C to +125°C
0.8
0.01
-0.1
10
V
DD
+ 0.1
50
100
500
5
0.5
10
100
pF
dB
pA
FV/NC
FV
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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Maxim Integrated Products
2
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, V
SS
= 0V, V
IN+
= V
IN-
= V
DD
/2, RL = 10kI to V
DD
/2, V
CAL
= V
SHDN
= V
DD
, T
A
= -40NC to +125NC. Typical values are
at T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
V
OL
-
V
SS
Output Voltage Swing
V
DD
-
V
OH
AC CHARACTERISTICS
Input Voltage-Noise Density
Input Current-Noise Density
Gain-Bandwidth Product
Slew Rate
Settling Time
Capacitive Loading
Total Harmonic Distortion
Output Transient Recovery Time
POWER-SUPPLY CHARACTERISTICS
Power-Supply Range
Power-Supply Rejection Ratio
Quiescent Current
Shutdown Supply Current
Shutdown Input Low
Shutdown Input High
Output Leakage Current in
Shutdown
Shutdown Input Bias Current
Shutdown Turn-On Time
Turn-On Time
V
DD
PSRR
I
DD
I
SHDN
V
IL
V
IH
I
SHDN
I
IL
/I
IH
t
SHDN
t
ON
MAX44260
MAX44261
15
10
1.3
100
1
0.1
MAX44260/MAX44261 only
Guaranteed by PSRR
T
A
= 0NC to +70NC
V
CM
= V
DD
/2
1.8
1.7
82
95
750
1200
1
0.7
5.5
5.5
V
dB
µA
µA
V
V
pA
µA
µs
ms
C
LOAD
THD
e
n
i
n
GBWP
SR
V
OUT
= 2V
P-P
, V
DD
= 3.3V, A
V
= 1V/V,
C
L
= 30pF (load), settle to 0.01%
No sustained oscillation
f = 10kHz, V
O
= 2V
P-P
, A
V
= 1, R
OUT
= 10kI
DV
OUT
= 0.2V, V
DD =
3.3V
,
A
V =
1V/V;
R
S
= 20Ω, C
L
= 1nF (load)
f = 10kHz
f = 10kHz
12.7
1.2
15
7
1.7
300
-110
1
nV/√Hz
fA/√Hz
MHz
V/Fs
µs
pF
dB
µs
R
OUT
= 10kI
R
OUT
= 600I
R
OUT
= 32I
R
OUT
= 10kI
R
OUT
= 600I
R
OUT
= 32I
400
400
CONDITIONS
MIN
TYP
MAX
20
50
700
10
40
800
mV
UNITS
Note 2:
All devices are 100% production tested at T
A
= +25NC. Temperature limits are guaranteed by design.
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Maxim Integrated Products
3
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics
(V
DD
= 3.3V, V
SS
= 0V, V
IN+
= V
IN-
= V
DD
/2, R
L
= 10kI to V
DD
/2, V
CAL
= V
SHDN
= V
DD
, T
A
= -40NC to +125NC. Typical values are at
T
A
= +25NC, unless otherwise noted. All devices are 100% production tested at T
A
= +25NC. Temperature limits are guaranteed by design.)
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX44260 toc01
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
MAX44260 toc02
80
INPUT OFFSET VOLTAGE (µV)
60
40
20
0
-20
-40
-60
-80
-100
INPUT OFFSET VOLTAGE (µV)
40
20
0
-20
-40
-60
-0.5
0
0.5
1.0
1.5
2.0
T
A
= +25°C
T
A
= +125°C
2.5
3.0
T
A
= -40°C
T
A
= -40°C
PERCENT OCCURRENCE (%)
20
15
10
5
0
-15 -10
-5
0
5
T
A
= +25°C
T
A
= +125°C
3.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
10
15
20
25
COMMON-MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE (µV)
INPUT OFFSET DRIFT HISTOGRAM
MAX44260 toc04
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
MAX44260 toc05
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V
OL
- V
EE
, V
CC
= 1.8V)
180
OUTPUT-VOLTAGE LOW (mV)
160
140
120
100
80
60
40
20
0
T
A
= +125°C
T
A
= -40°C
T
A
= +25°C
MAX44260 toc06
18
16
PERCENT OCCURRENCE (%)
14
12
10
8
6
4
2
0
-2
100
80
INPUT BIAS CURRENT (pA)
60
40
20
0
-20
-40
-60
-80
-100
-0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
T
A
= -40°C
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
200
-1.5 -1 -0.5
0
0.50 1.00
-1.8 -1.3 -0.8 -0.3 0.25 0.75 1.25
INPUT OFFSET DRIFT (µV/°C)
3.5
0.1
COMMON-MODE VOLTAGE (V)
1
10
OUTPUT SINK CURRENT (mA)
100
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Maxim Integrated Products
4
MAX44260 toc03
60
100
INPUT V
OS
HISTOGRAM
25
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, V
SS
= 0V, V
IN+
= V
IN-
= V
DD
/2, R
L
= 10kI to V
DD
/2, V
CAL
= V
SHDN
= V
DD
, T
A
= -40NC to +125NC. Typical values are at
T
A
= +25NC, unless otherwise noted. All devices are 100% production tested at T
A
= +25NC. Temperature limits are guaranteed by design.)
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V
OL
- V
EE
, V
CC
= 3.3V)
MAX44260 toc07
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V
OL
- V
EE
, V
CC
= 5V)
MAX44260 toc08
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V
CC
- V
OH
, V
CC
= 1.8V)
180
OUTPUT-VOLTAGE HIGH (mV)
160
140
120
100
80
60
40
20
0
100
0.1
1
10
OUTPUT SOURCE CURRENT (mA)
100
T
A
= +125°C
T
A
= -40°C
T
A
= +25°C
MAX44260 toc09
200
180
OUTPUT-VOLTAGE LOW (mV)
160
140
120
100
80
60
40
20
0
0.1
1
10
OUTPUT SINK CURRENT (mA)
T
A
= -40°C
T
A
= +125°C
T
A
= +25°C
200
180
OUTPUT-VOLTAGE LOW (mV)
160
140
120
100
80
60
40
20
T
A
= -40°C
T
A
= +125°C
T
A
= +25°C
200
100
0
0.1
1
10
OUTPUT SINK CURRENT (mA)
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V
CC
- V
OH
, V
CC
= 3.3V)
MAX44260 toc10
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V
CC
- V
OH
, V
CC
= 5V)
MAX44260 toc11
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX44260 toc12
200
180
OUTPUT-VOLTAGE HIGH (mV)
160
140
120
100
80
60
40
20
0
0.1
1
10
OUTPUT SOURCE CURRENT (mA)
T
A
= +125°C
T
A
= -40°C
T
A
= +25°C
200
180
OUTPUT-VOLTAGE HIGH (mV)
160
140
120
100
80
60
40
20
0
T
A
= +125°C
T
A
= -40°C
T
A
= +25°C
900
850
SUPPLY CURRENT (µA)
800
750
700
650
600
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
T
A
= -40°C
T
A
= +25°C
T
A
= +125°C
100
0.1
1
10
OUTPUT SOURCE CURRENT (mA)
100
5.5
SUPPLY VOLTAGE (V)
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Maxim Integrated Products
5
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