MAX44261AXT+ [MAXIM]
1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps; 1.8V 15MHz的低失调，低功耗，轨到轨输入/输出运算放大器
| 型号： | MAX44261AXT+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 1.8V 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps |
| 文件： | 总16页 (文件大小：2349K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5873; Rev 1; 8/11
E V A L U A T I O N K I T A V A I L A B L E
General Description
Features
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.
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
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.
S Low 50µV (max) V
at +25°C
OS
S On-Demand V
Self-Calibration (MAX44261)
OS
S 500fA Low Input Bias Current
S 750µA Quiescent Current per Amplifier
S < 1µA Supply Current in Shutdown
S Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin
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.
µDFN (MAX44260) Packages
S Low 110dB Total Harmonic Distortion
Applications
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.
Notebooks
3G/4G Handsets
Portable Media Players
Portable Medical Instruments
Battery-Operated Devices
Analog-to-Digital Converter Buffers
Transimpedance Amplifiers
General-Purpose Signal Processing
Ordering Information appears at end of data sheet.
Typical Application Circuit
15nF
+3.3V
2.4kI
22kI
330pF
MAX44260
10kI
ADC
MAX11645
3.3nF
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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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 - 0.3V) to (V
+ 0.3V)
6-Pin Thin µDFN (Ultra-Thin LGA)
SS
DD
(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
V
to V ...............................................................-0.3V to +6V
DD
SS
SHDN, CAL .............................................................-0.3V to +6V
Output to Short-Circuit Ground Duration .............................. 10s
Continuous Input Current into Any Pin............................ Q20mA
Continuous Power Dissipation (T = +70NC)
A
SC70 (derate 3.1mW/NC above +70NC)......................245mW
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
Thin µDFN (Ultra-Thin LGA)
Junction-to-Ambient Thermal Resistance (B ) ....... 470NC/W
Junction-to-Ambient Thermal Resistance (B ) .... 326.5NC/W
JA
JA
Junction-to-Case Thermal Resistance (B ).............115NC/W
JC
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
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are
L
DD
SS
IN+
IN-
DD
DD
CAL
SHDN DD A
at T = +25NC, unless otherwise noted.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
V
+ 0.1
DD
Input Voltage Range
V
V
Guaranteed by CMRR test
-0.1
V
IN+ IN-
T
T
= +25NC
10
50
A
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
V
100
500
5
FV
FV/NC
pA
= -40°C to +125°C after calibration
OS
A
T = -40°C to +125°C
A
V
- TC
0.8
OS
I
T
T
T
= +25NC
0.01
0.5
10
A
A
A
= -40NC to +85NC
= -40NC to +125NC
B
100
Input Capacitance
C
4
pF
dB
IN
Common-Mode Rejection Ratio
CMRR
V
= -0.1V to (V
+ 0.1V)
75
100
91
90
CM
DD
0.4V PV
0.4V PV
0.4V PV
PV
PV
PV
- 0.4V, R
- 0.4V, R
- 0.4V, R
= 10kI
= 600I
= 32I
115
100
80
OUT
OUT
OUT
DD
DD
DD
OUT
OUT
OUT
Open-Loop Gain
A
dB
OL
SC
Output Short-Circuit Current
I
To V
or V
50
mA
DD
SS
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2
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are
L
DD
SS
IN+
IN-
DD
DD
CAL
SHDN DD A
at T = +25NC, unless otherwise noted.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
400
400
MAX
20
UNITS
R
R
R
R
R
R
= 10kI
= 600I
= 32I
OUT
OUT
OUT
OUT
OUT
OUT
V
-
OL
50
V
SS
700
10
Output Voltage Swing
mV
= 10kI
= 600I
= 32I
V
-
DD
40
V
OH
800
AC CHARACTERISTICS
Input Voltage-Noise Density
Input Current-Noise Density
Gain-Bandwidth Product
Slew Rate
e
f = 10kHz
f = 10kHz
12.7
1.2
15
nV/√Hz
fA/√Hz
MHz
n
i
n
GBWP
SR
7
V/Fs
V
= 2V , V
= 3.3V, A = 1V/V,
OUT
P-P DD V
Settling Time
1.7
µs
C = 30pF (load), settle to 0.01%
L
Capacitive Loading
C
No sustained oscillation
300
pF
dB
LOAD
Total Harmonic Distortion
THD
f = 10kHz, V = 2V , A = 1, R
= 10kI
-110
O
P-P
V
OUT
DV
= 0.2V, V
3.3V A
1V/V;
V =
OUT
DD =
,
Output Transient Recovery Time
1
µs
R = 20Ω, C = 1nF (load)
S
L
POWER-SUPPLY CHARACTERISTICS
Guaranteed by PSRR
= 0NC to +70NC
1.8
1.7
82
5.5
5.5
Power-Supply Range
V
DD
V
T
A
Power-Supply Rejection Ratio
Quiescent Current
PSRR
V
= V /2
95
dB
µA
µA
V
CM
DD
I
750
1200
1
DD
Shutdown Supply Current
Shutdown Input Low
MAX44260/MAX44261 only
I
SHDN
V
0.7
IL
Shutdown Input High
V
1.3
V
IH
Output Leakage Current in
Shutdown
100
pA
µA
I
SHDN
MAX44260
MAX44261
1
Shutdown Input Bias Current
I /I
IL IH
0.1
Shutdown Turn-On Time
Turn-On Time
15
10
µs
t
SHDN
t
ms
ON
Note 2: All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.
A
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3
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are at
DD
SS
IN+
IN-
DD
L
DD
CAL
SHDN DD A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
A
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
INPUT V HISTOGRAM
OS
60
40
100
80
25
20
15
10
5
T
= -40°C
= +25°C
A
A
60
40
20
20
T
T
A
= -40°C
0
0
-20
-40
-60
-80
-100
-20
-40
-60
T
= +25°C
A
T
A
= +125°C
T
= +125°C
A
0
-0.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
COMMON-MODE VOLTAGE (V)
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
10
-15 -10 -5
0
5
15 20 25
INPUT OFFSET VOLTAGE (µV)
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V - V , V = 1.8V)
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
INPUT OFFSET DRIFT HISTOGRAM
OL
EE CC
18
16
14
12
10
8
100
80
200
180
160
140
120
100
80
60
40
T
= +25°C
A
20
T
= +25°C
A
0
-20
-40
-60
-80
-100
T
A
= +125°C
6
T
A
= -40°C
T = +85°C
A
60
4
T
A
= -40°C
10
40
T
A
= +125°C
2
20
0
0
-2 -1.5 -1 -0.5
0
0.50 1.00
-0.5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
COMMON-MODE VOLTAGE (V)
0.1
1
100
-1.8 -1.3 -0.8 -0.3 0.25 0.75 1.25
OUTPUT SINK CURRENT (mA)
INPUT OFFSET DRIFT (µV/°C)
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4
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are at
DD
SS
IN+
IN-
DD
L
DD
CAL
SHDN DD A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
A
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V - V , V = 3.3V)
(V - V , V = 5V)
(V - V , V = 1.8V)
CC OH CC
OL
EE CC
OL
EE CC
200
180
160
140
120
100
80
200
180
160
140
120
100
80
200
180
160
140
120
100
80
T
= +25°C
A
T
= +25°C
T = +25°C
A
A
T
A
= +125°C
T
A
= +125°C
T = +125°C
A
60
60
60
T
A
= -40°C
10
40
40
40
20
20
20
T
= -40°C
T
= -40°C
A
A
0
0
0
0.1
1
10
100
0.1
1
10
100
0.1
1
100
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
OUTPUT SOURCE CURRENT (mA)
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V - V , V = 3.3V)
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V - V , V = 5V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
CC
OH CC
CC
OH CC
200
180
160
140
120
100
80
200
180
160
140
120
100
80
900
850
800
750
700
650
600
T
A
= +25°C
T
= +25°C
A
T
= +25°C
A
T
A
= +125°C
T
A
= +125°C
T = +125°C
A
T
A
= -40°C
T
A
= -40°C
60
60
T
= -40°C
A
40
40
20
20
0
0
0.1
1
10
100
0.1
1
10
100
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
OUTPUT SOURCE CURRENT (mA)
OUTPUT SOURCE CURRENT (mA)
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5
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are at
DD
SS
IN+
IN-
DD
L
DD
CAL
SHDN DD A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
A
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
OPEN-LOOP GAIN
vs. FREQUENCY
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
(V
SHDN
= V )
EE
120
100
80
60
40
20
0
0
-20
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
T
= +125°C
A
-40
-60
T
A
= -40°C
-80
T
= +25°C
A
-100
-120
0.001 0.01
0
1
10 100 1k 10k 100k
0.01
0
1
10 100 1k
10k 100k
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
FREQUENCY (kHz)
FREQUENCY (kHz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
DC CMRR AND PSRR
vs. TEMPERATURE
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
0
-20
-90
-92
500
450
400
350
300
250
200
150
100
50
DC CMRR
-40
-94
-60
-96
-80
-98
DC PSRR
-100
-120
-100
0
0.01 0.1
1
10 100 1k
10k 100k
-50 -25
0
25
50
75 100 125
0.01
0.1
1
10
100
1k
10k
FREQUENCY (kHz)
TEMPERATURE (°C)
FREQUENCY (kHz)
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6
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are at
DD
SS
IN+
IN-
DD
L
DD
CAL
SHDN DD A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
A
TOTAL HARMONIC DISTORTION
vs. INPUT AMPLITUDE
INPUT CURRENT-NOISE DENSITY
vs. FREQUENCY
0.1Hz TO 10Hz OUTPUT-VOLTAGE NOISE
(f = 10kHz, V = 5.5V, A = 1V/V)
CC
V
MAX44260 toc19
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
120
115
110
105
100
95
0.5µV/div
90
85
80
4s/div
10
100
1000
10k
100k
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT AMPLITUDE (V)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY (V = 2V
)
SMALL-SIGNAL TRANSIENT RESPONSE
LARGE-SIGNAL TRANSIENT RESPONSE
IN
P-P
MAX44260 toc23
MAX44260 toc24
-80
-85
INPUT
50mV/div
INPUT
1V/div
V /2
CC
-90
V
/2
CC
-95
-100
-105
-110
-115
-120
V
= 5.5V
CC
OUTPUT
500mV/div
V
/2
CC
OUTPUT
50mV/div
V
CC
= 3.3V
V
/2
CC
1
10
100
1k
10k
100k
200ns/div
100ns/div
FREQUENCY (Hz)
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7
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Typical Operating Characteristics (continued)
(V
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are at
DD
SS
IN+
IN-
DD
L
DD
CAL
SHDN DD A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
A
PERCENT OVERSHOOT
vs. LOAD RESISTANCE (V = 100mV
STABILITY vs. CAPACITIVE LOAD
AND ISOLATION RESISTANCE
STABILITY vs. CAPACITIVE
AND RESISTIVE LOAD
)
P-P
IN
20
18
16
14
12
10
8
30
28
26
24
22
20
18
16
14
12
10
8
100k
10k
1k
UNSTABLE
STABLE
STABLE
100
10
6
6
4
2
4
UNSTABLE
2
0
0
1
100
1k
10k
100k
0
500 1000 1500 2000 2500 3000 3500 4000
CAPACITIVE LOAD (pF)
100
1k
10k
100k
LOAD RESISTANCE (I)
CAPACITIVE LOAD (pF)
POWER-UP TIME
TURN-ON TIME FROM SHUTDOWN
MAX44260 toc29
MAX44260 toc28
V
SHDN
2V/div
CC
2V/div
GND
V
SS
OUTPUT
500mV/div
OUTPUT
500mV/div
V
SS
GND
4ms/div
10µs/div
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8
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Pin Configurations
TOP VIEW
V
SHDN
5
OUT
4
DD
NOT TO SCALE
+
+
6
IN+
1
6
5
4
V
IN+
1
2
3
6
5
4
V
DD
MAX44260
DD
MAX44261
V
SS
2
3
V
SS
SHDN
OUT
CAL
OUT
MAX44260
IN-
IN-
1
2
3
+
SC70
SC70
IN+
V
IN-
SS
Thin µDFN
(Ultra-Thin LGA)
Pin Description
PIN
NAME
FUNCTION
MAX44260
MAX44261
1
—
—
2
1
—
—
2
IN+
Positive Input
INA+
INB+
Positive Input A
Positive Input B
V
Negative Power Supply. Bypass with a 0.1FF capacitor to ground.
SS
3
3
IN-
Negative Input
—
—
4
—
—
4
INA-
Negative Input A
INB-
Negative Input B
OUT
Output
—
—
—
5
—
—
5
OUTA
OUTB
CAL
Output A
Output B
Active-Low Calibrate Input
—
6
Active-Low Shutdown
SHDN
6
V
Positive Power Supply. Bypass with a 0.1FF capacitor to ground.
DD
����������������������������������������������������������������� Maxim Integrated Products
9
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Crossover Distortion
These op amps feature a low-noise integrated charge
pump that creates an internal voltage rail 1V above
Detailed Description
The MAX44260/MAX44261 are high-speed low-power op
amps ideal for signal processing applications due to the
device’s high precision and low-noise CMOS inputs. The
devices self-calibrate on power-up to eliminate effects of
temperature and power-supply variation.
V
which is used to power the input differential
DD,
pair of PMOS transistors as shown in Figure 1. Such
a unique architecture eliminates crossover distor-
tion common in traditional CMOS input architecture
(Figure 2), especially when used in a noninverting
configuration, such as for Sallen-Key filters.
The MAX44260 also features a low-power shutdown
mode that greatly reduces quiescent current while the
device is not operational and recovers in 30µs.
The charge pump’s operating frequency lies well above
the unity-gain frequency of the amplifier. Thanks to its high-
frequency operation and ultra-quiet circuitry, the charge
pump generates little noise, does not require external
components, and is entirely transparent to the user.
The MAX44261 features a user-selectable self-calibration
input that shuts down the device and allows it to be reca-
librated at any time. The calibration routine takes 10ms.
INTERNAL
CHARGE
PUMP
STANDARD INPUT STRUCTURE
MAX44260 INPUTS STRUCTURE
Figure 1. Comparing the Input Structure of the MAX44260 to Standard Op-Amp Inputs
CROSSOVER
DISTORTION
MAX44261
TIME
Figure 2. Crossover Distortion of Typical Amplifiers
���������������������������������������������������������������� Maxim Integrated Products 10
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
and retains its power-up trim settings. Figure 3 shows
that the device also recovers from shutdown in under
Applications Information
30Fs.
Power-Up Autotrim
The ICs feature an automatic trim that self-calibrates the
The MAX44261 features a recalibrate input that acts the
same as the shutdown mode of the MAX44260. However,
when the input is pulled low, the device goes through a
self-calibration sequence again (Figure 3).
V
OS
of these devices to less than 100FV of input offset
voltage on power-up. This self-calibration feature allows
the device to eliminate input offset voltage effects due
to power supply and operating temperature variation
simply by cycling its power. The autotrim sequence takes
approximately 10ms to complete and is triggered by an
internal power-on-reset (POR) circuitry. During this time,
the inputs and outputs are put into high impedance and
left unconnected. The MAX44261 can also be forced into
a self-calibration cycle by pulling the CAL input low for
1ms. This input also puts the part into shutdown mode.
The shutdown logic levels of the devices are indepen-
dent of supply, allowing the shutdown feature of the
device to operate off of a 1.8V or 3.3V microcontroller,
regardless of supply voltage.
Rail-to-Rail Input/Output
The input voltage range of the ICs extends 100mV
above V
and below V . The wide input common-
DD
SS
mode voltage range allows the op amp to be used as
a buffer and as a differential amplifier in a wide-variety
of signal processing applications. Output voltage high/
Shutdown Operation
The MAX44260 features an active-low shutdown mode
that puts both inputs and outputs into high impedance
and substantially lowers the quiescent current to less
than 1FA. Putting the output into high impedance allows
multiple outputs to be multiplexed onto a single output
line without the additional external buffers. The device
does not self-calibrate when exiting shutdown mode
low is designed to be only 50mV above V and below
SS
V
DD
allowing maximum dynamic range in single-supply
applications. The high output current and capacitance
drive capability of the devices make them ideal as an
ADC driver and a line driver.
V
DD
V
/V
SHDN CAL
0V
V
/2
DD
FAST RECOVERY
AMPLIFIER
ACTIVE
MAX44260
OUTPUT
0V
V
DD
/2
RECALIBRATED
AMPLIFIER
ACTIVE
MAX44261
OUTPUT
AUTOTRIM
SEQUENCE
0V
30µs
10ms
Figure 3. CAL vs. SHDN Input Operation.
���������������������������������������������������������������� Maxim Integrated Products 11
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Input Bias Current
The ICs feature a high-impedance CMOS input stage
and a specialized ESD structure that allows low-input
bias current operation at low-input, common-mode volt-
ages. Low-input bias current is useful when interfacing
with high-ohmic sensors. It is also beneficial for design-
ing transimpedance amplifiers for photodiode sensors.
This makes these devices ideal for ground-referenced
medical and industrial sensor applications.
Driver for Interfacing with
the MAX11645 ADC
The ICs’ tiny size and low noise makes them a good fit for
driving 12- to 16-bit resolution ADCs in space-constrained
applications. The Typical Application Circuit shows the
MAX44260 amplifier output connected to a lowpass filter
driving the MAX11645 ADC. The MAX11645 is part of a
family of 3V and 5V, 12-bit and 10-bit, 2-channel ADCs.
The MAX11645 offers sample rates up to 94ksps and
measures two single-ended inputs or one differential
input. These ADCs dissipate 670FA at the maximum
sampling rate, but just 6FA at 1ksps and 0.5FA in shut-
down. Offered in the ultra-tiny, 1.9mm x 2.2mm WLP and
FMAX-8 packages, the MAX11645 ADCs are an ideal fit
to pair with the MAX44260/MAX44261 amplifiers in por-
table applications.
Active Filters
The MAX44260/MAX44261 are ideal for a wide variety
of active filter circuits that make use of their wide band-
width, rail-to-rail input/output stages and high-impedance
CMOS inputs. The Typical Application Circuit shows an
example Sallen-Key active filter circuit with a corner
frequency of 10kHz. At low frequencies, the amplifier
behaves like a simple low-distortion noninverting buf-
fer, while its high bandwidth gives excellent stopband
attenuation above its corner frequency. See the Typical
Application Circuit.
Where higher resolution is required, refer to the MAX1069
(14-bit) and MAX1169 (16-bit) ADC families.
Chip Information
Ordering Information
PROCESS: BiCMOS
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
MAX44260AXT+ -40NC to +125NC 6 SC70
+AEB
+AY
6 Thin FDFN
MAX44260AYT+* -40NC to +125NC (Ultra-Thin
LGA)
MAX44261AXT+ -40NC to +125NC 6 SC70
+AEC
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
���������������������������������������������������������������� Maxim Integrated Products 12
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains
to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
21-0077
LAND PATTERN NO.
90-0189
6 SC70
X6SN+1
6 Thin FDFN
(Ultra-Thin LGA)
Y61A1+1
21-0190
90-0233
���������������������������������������������������������������� Maxim Integrated Products 13
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains
to the package regardless of RoHS status.
���������������������������������������������������������������� Maxim Integrated Products 14
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains
to the package regardless of RoHS status.
TABLE 1
TABLE 2
���������������������������������������������������������������� Maxim Integrated Products 15
MAX44260/MAX44261
1.8V 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
1
6/11
Initial release
Added thin mDFN (ultra-thin LGA) package and updated slew rate and TOC 29
—
8/11
1, 2, 3, 8, 9, 12
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
16
©
2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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