MAX44259AUK+ [MAXIM]
1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps;
| 型号： | MAX44259AUK+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 1.8V, 15MHz Low-Offset, Low-Power, Rail-to-Rail I/O Op Amps |
| 文件： | 总14页 (文件大小：1007K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX44259/MAX44260/
MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
General Description
Benefits and Features
● Low Noise for Higher System Accuracy
• 12.7nV/√Hz Input Voltage-Noise Density
• 1.2fA/√Hz Input Current-Noise Density
• 50µV (max) VOS at +25°C
The MAX44259/MAX44260/MAX44261/MAX44263 offer
a unique combination of high speed, precision, low noise,
and low-voltage operation making them ideally suited for a
large number of signal processing functions such as filter-
ing and amplification of signals in portable and industrial
equipment.
• 110dB Total Harmonic Distortion
● 15MHz Unity-Gain Bandwidth Enables for High-
Bandwidth Applications
The devices’ rail-to-rail input/outputs and low noise
guarantee maximum dynamic range in demanding appli-
cations such as 12- to 14-bit SAR ADC drivers. Unlike
traditional rail-to-rail input structures, input crossover dis-
tortion is absent due to an optimized input stage with an
ultra-quiet charge pump.
● Low Power Extends the Battery Life of Portable
Equipment
• 500fA Low Input Bias Current
• 750µA Quiescent Current per Amplifier
• < 1µA Supply Current in Shutdown
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 MAX44263 is a
dual amplifier.
● On-Demand V
Self-Calibration (MAX44261)
OS
● Saves Board Space
• Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin
µDFN (MAX44260) and SOT23 (MAX44259)
Packages
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
temperature range. The MAX44259 is offered in a 5-pin
SOT23 package. The MAX44260/MAX44261 are avail-
able in small, 6-pin SC70 packages. The MAX44260 is
also available in a 1mm x 1.5mm thin µDFN (ultra-thin
LGA) package. The MAX44263 is available in a small
8-pin SC70 package.
● Wide Supply Range from 1.8V to 5.5V Simplifies
Power-Supply Requirements
Applications
● Notebooks
● 3G/4G Handsets
● Portable Media Players
● Portable Medical Instruments
● Battery-Operated Devices
● Analog-to-Digital Converter Buffers
● Transimpedance Amplifiers
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
19-5873; Rev 10; 8/19
MAX44259/MAX44260/
MAX44261/MAX44263
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)
SOT23 (derate 3.9mW/NC above +70NC).................312.6mW
6-Pin Thin µDFN (Ultra-Thin LGA)
SS
DD
V
to V ..............................................................-0.3V to +6V
DD
SS
(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
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 operation
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
SOT23
Junction-to-Ambient Thermal Resistance (B ) .... 255.9NC/W
JA
Junction-to-Case Thermal Resistance (B )...............81NC/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.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
DD
= 3.3V, V = 0V, V
= V = V /2, R = 10kI to V /2, V
= V
= V , T = -40NC to +125NC. Typical values are
L
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
VDD
+ 0.1
Input Voltage Range
V
IN
+ V
Guaranteed by CMRR test
-0.1
V
IN-
T
T
= +25NC
10
50
A
A
= -40°C to +125°C after calibration
100
Input Offset Voltage (Note 3)
V
FV
OS
MAX44260/MAX44261
MAX44259/MAX44263
500
800
5
T = -40°C to
+125°C
A
MAX44260/MAX44261
MAX44259/MAX44263
0.8
1
Input Offset Voltage Drift
(Note 3)
V
- TC
FV/NC
OS
8
MAX44259/
MAX44260/MAX44261
0.01
0.01
0.5
T
= +25NC
A
MAX44263
0.5
10
Input Bias Current (Note 3)
I
T
T
= -40NC to +85NC
= -40NC to
pA
B
A
A
MAX44259/
MAX44260/MAX44261
100
160
+125NC
MAX44263
Input Capacitance
C
0.4
90
pF
dB
IN
Common-Mode Rejection Ratio
CMRR
V
CM
= -0.1V to (V
+ 0.1V)
75
DD
V
(V
= -0.1V to
+ 0.1V)
CM
11
Common mode
10
DD
Input Resistance
R
Ω
IN
12
10
Differential mode
Maxim Integrated
│ 2
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MAX44259/MAX44260/
MAX44261/MAX44263
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
MAX44259/
MIN
TYP
MAX
UNITS
dB
0.4V P V
OUT
100
115
MAX44260/MAX44261
P V
- 0.4V,
DD
R
OUT
= 10kI
MAX44263
97
91
86
115
100
Open-Loop Gain
A
OL
MAX44259/
MAX44260/MAX44261
0.4V P V
OUT
P V
- 0.4V,
DD
R
OUT
= 600I
MAX44263
100
80
0.4V P V
P V
- 0.4V, R
= 32I
OUT
DD
OUT
Output Short-Circuit Current
I
To V
or V
SS
50
mA
SC
DD
R
R
R
= 10kI
= 600I
= 32I
20
50
OUT
OUT
OUT
V
V
-
-
OL
SS
400
700
MAX44259/
MAX44260/MAX44261
10
10
40
R
OUT
= 10kI
Output Voltage Swing
mV
MAX44263
V
DD
MAX44259/
MAX44260/MAX44261
V
OH
R
R
= 600I
= 32I
OUT
OUT
MAX44263
50
400
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;
OUT
DD
V
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
5.5
5.5
Power-Supply Range
V
V
DD
T
A
MAX44259/MAX44260/
MAX44261
82
76
95
Power-Supply Rejection Ratio
PSRR
V
= V /2
dB
CM
DD
MAX44263
95
MAX44259/MAX44260/MAX44261
MAX44263 (per amplifier)
(Note 4)
750
650
1200
1100
1
Quiescent Current
I
µA
µA
DD
Shutdown Supply Current
I
SHDN
Maxim Integrated
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MAX44259/MAX44260/
MAX44261/MAX44263
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
Shutdown Input Low
Shutdown Input High
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
IL
(Note 4)
(Note 4)
0.5
V
V
V
1.3
IH
Output Leakage Current in
Shutdown
I
(Note 4)
100
pA
µA
SHDN
MAX44260
MAX44261
1
Shutdown Input Bias Current
I /I
IL IH
0.1
T
T
T
T
= +25NC (Note 3)
14.4
9.7
18.9
26.7
15.2
18.4
A
A
A
A
Shutdown Turn-On Time
(Note 4)
t
µs
SHDN
= -40°C to +125°C (Note 3)
= +25NC (Note 3)
Turn-On Time
t
ms
ON
= -40°C to +125°C (Note 3)
CAL Turn-On Time
(MAX44261 Only)
T
10
ms
T
= +25°C (Note 3)
CAL
A
Note 2: All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.
A
Note 3: Guaranteed by design.
Note 4: MAX44259/MAX44260 only.
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
A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
INPUT V HISTOGRAM
OS
60
40
25
20
15
10
5
100
80
T
= -40°C
= +25°C
A
A
60
40
20
20
T
T
= -40°C
0
A
0
-20
-40
-60
-80
-100
-20
-40
-60
T
A
= +25°C
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)
10
INPUT OFFSET VOLTAGE (µV)
-15 -10 -5
0
5
15 20 25
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Maxim Integrated
│ 4
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MAX44259/MAX44260/
MAX44261/MAX44263
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
A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V - V , V = 1.8V)
OL EE CC
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
INPUT OFFSET DRIFT HISTOGRAM
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)
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V - V , V = 3.3V)
OUTPUT-VOLTAGE HIGH
OUTPUT-VOLTAGE LOW
vs. OUTPUT SINK CURRENT
(V - V , V = 5V)
vs. OUTPUT SOURCE CURRENT
(V - V , V = 1.8V)
OL
EE CC
CC
OH 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
A
= +25°C
T
= +25°C
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
T
= -40°C
20
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)
Maxim Integrated
│ 5
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MAX44259/MAX44260/
MAX44261/MAX44263
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
A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
(V - V , V = 5V)
OUTPUT-VOLTAGE HIGH
vs. OUTPUT SOURCE CURRENT
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(V - V , V = 3.3V)
CC OH CC
CC OH CC
200
180
160
140
120
100
80
900
850
800
750
700
650
600
200
180
160
140
120
100
80
T
A
= +25°C
T
= +25°C
A
T
= +25°C
A
T
A
= +125°C
T = +125°C
A
T
A
= +125°C
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)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
OPEN-LOOP GAIN
vs. FREQUENCY
(V
SHDN
= V )
EE
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
120
100
80
60
40
20
0
-20
-40
T
A
= +125°C
-60
T
A
= -40°C
-80
T
= +25°C
A
-100
-120
100
10
1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
1
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
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
0
-100
10
100
1k
10k
100k
1M
10M
10 100 1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
-50 -25
0
25
50
75 100 125
FREQUENCY (Hz)
TEMPERATURE (°C)
Maxim Integrated
│ 6
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MAX44259/MAX44260/
MAX44261/MAX44263
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
A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
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
120
115
110
105
100
95
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2µV/div
90
85
80
4s/div
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT AMPLITUDE (V)
10
100
1000
10k
100k
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
-90
V
/2
CC
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)
Maxim Integrated
│ 7
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MAX44259/MAX44260/
MAX44261/MAX44263
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
A
T = +25NC, unless otherwise noted. All devices are 100% production tested at T = +25NC. Temperature limits are guaranteed by design.)
A
STABILITY vs. CAPACITIVE LOAD
AND ISOLATION RESISTANCE
PERCENT OVERSHOOT
STABILITY vs. CAPACITIVE
AND RESISTIVE LOAD
vs. LOAD RESISTANCE (V = 100mV
)
IN
P-P
30
28
26
24
22
20
18
16
14
12
10
8
20
18
16
14
12
10
8
100k
10k
1k
UNSTABLE
STABLE
STABLE
100
10
6
6
4
4
UNSTABLE
2
2
0
1
0
0
500 1000 1500 2000 2500 3000 3500 4000
CAPACITIVE LOAD (pF)
100
1k
10k
100k
100
1k
10k
100k
CAPACITIVE LOAD (pF)
LOAD RESISTANCE (I)
TURN-ON TIME FROM SHUTDOWN
POWER-UP TIME
MAX44260 toc29
MAX44260 toc28
SHDN
2V/div
V
CC
2V/div
V
GND
SS
OUTPUT
500mV/div
OUTPUT
500mV/div
V
SS
GND
10µs/div
4ms/div
Maxim Integrated
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MAX44259/MAX44260/
MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Pin Configurations
TOP VIEW
NOT TO SCALE
ꢁ
ꢁ
ꢁ
OUT
V
1
2
3
5
4
V
DD
IN+
1
2
3
6
5
4
V
IN+
1
2
3
6
5
4
V
DD
MAX44260
DD
MAX44261
V
V
SS
SHDN
OUT
CAL
OUT
SS
SS
IN-
IN-
IN+
IN-
MAX44259
SCꢀ0
SCꢀ0
SOT23
TOP VIEW
V
SHDN
5
OUT
4
MAX44263
DD
ꢁ
OUTA
INA-
6
8
7
6
5
1
2
3
4
V
DD
OUTB
INB-
MAX44260
INA+
V
SS
INB+
1
2
3
ꢁ
SCꢀ0
IN+
V
SS
IN-
Thin µDFN
(Ultra-Thin LGA)
Pin Description
PIN
NAME
IN+
FUNCTION
MAX44259 MAX44260 MAX44261 MAX44263
3
2
1
2
1
2
—
4
Positive Input
Negative Power Supply. Bypass with a 0.1FF capacitor to
VSS
ground.
4
1
3
4
3
4
—
—
—
—
IN-
OUT
CAL
Negative Input
Output
—
—
—
5
5
Active-Low Calibrate Input
Active-Low Shutdown
—
SHDN
Positive Power Supply. Bypass with a 0.1FF capacitor to
ground.
5
6
6
8
VDD
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
2
3
5
6
7
OUTA
INA-
Channel A Output
Channel A Negative Input
Channel A Positive Input
Channel B Positive Input
Channel B Negative Input
Channel B Output
INA+
INB+
INB-
OUTB
Maxim Integrated
│ 9
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MAX44259/MAX44260/
MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Crossover Distortion
Detailed Description
These op amps feature a low-noise integrated charge
pump that creates an internal voltage rail 1V above
The MAX44259/MAX44260/MAX44261/MAX44263 are
high-speed low-power op amps ideal for signal process-
ing 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 differen-
DD,
tial 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.
Figure 1
INTERNAL
CHARGE
PUMP
STANDARD INPUT STRUCTURE
MAX44260 INPUTS STRUCTURE
Figure 1. Comparing the Input Structure of the MAX44260 to Standard Op-Amp Inputs
Figure 2
CROSSOVER
DISTORTION
MAX44261
TIME
Figure 2. Crossover Distortion of Typical Amplifiers
Maxim Integrated
│ 10
www.maximintegrated.com
MAX44259/MAX44260/
MAX44261/MAX44263
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 30Fs.
Applications Information
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 50µV 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
1µs. This input also puts the part into shutdown mode.
The shutdown logic levels of the devices are independent
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-mode volt-
DD
SS
age range allows the op amp to be used as a buffer and
as a differential amplifier in a wide-variety of signal pro-
cessing applications. Output voltage high/low is designed
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
to be only 50mV above V
and below V
allowing
SS
DD
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.
Figure 3
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
│ 11
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MAX44259/MAX44260/
MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Input Bias Current
Driver for Interfacing with
the MAX11645 ADC
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 designing
transimpedance amplifiers for photodiode sensors. This
makes these devices ideal for ground-referenced medical
and industrial sensor applications.
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 sam-
pling rate, but just 6FA at 1ksps and 0.5FA in shutdown.
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/MAX44263 amplifiers in
portable applications.
Active Filters
The MAX44259/MAX44260/MAX44261/MAX44263 are
ideal for a wide variety of active filter circuits that make use
of their wide bandwidth, 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
buffer, 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
PROCESS: BiCMOS
Ordering Information
PIN-
PACKAGE
TOP
MARK
PART
TEMP RANGE
MAX44259AUK+
MAX44260AXT+
-40NC to +125NC 5 SOT23
-40NC to +125NC 6 SC70
+AMFX
+AEB
6 Thin FDFN
(Ultra-Thin LGA)
MAX44260AYT+
-40NC to +125NC
+AY
MAX44261AXT+
MAX44263AXA+
-40NC to +125NC 6 SC70
-40NC to +125NC 8 SC70
+AEC
+AAG
+Denotes a lead(Pb)-free/RoHS-compliant package.
Maxim Integrated
│ 12
www.maximintegrated.com
MAX44259/MAX44260/
MAX44261/MAX44263
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.maximintegrated.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.
LAND PATTERN NO.
5 SOT23
U5N+4
21-0057
90-0174
6 SC70
X6SN+1
Y61A1+1
X8CN+1
21-0077
21-0190
21-0460
90-0189
90-0233
90-0348
6 Thin µDFN
(Ultra-Thin LGA)
8 SC70
Maxim Integrated
│ 13
www.maximintegrated.com
MAX44259/MAX44260/
MAX44261/MAX44263
1.8V, 15MHz Low-Offset,
Low-Power, Rail-to-Rail I/O Op Amps
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
2
3
4
6/11
Initial release
—
1, 2, 3, 8, 9, 12
12
8/11
Added thin µDFN (ultra-thin LGA) package and updated slew rate and TOC 29
Removed future product information from data sheet
Revised Electrical Characteristics and the Power-Up Autotrim section
Revised Electrical Characteristics and Typical Operating Characteristics
10/11
2/12
7/12
2, 3, 11
3, 6
Added the MAX44263 and revised the Electrical Characteristics, Pin Description,
and Pin Configuration
5
10/12
1–17
6
7
12/12
9/14
Revised Typical Operating Characteristics
Added the MAX44259 to data sheet.
7
1–14
1
8
12/14
3/15
Revised General Description and Benefits and Features section
Revised Electrical Characteristics
9
2
10
8/19
Updated Electrical Characteristics
4
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated 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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2019 Maxim Integrated Products, Inc.
│ 14
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