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PDF MAX44267 Data sheet ( Hoja de datos )
| Número de pieza | MAX44267 | |
| Descripción | Dual Op Amp | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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MAX44267
+15V Single-Supply, Dual Op Amp
with ±10V Output Range
General Description
The MAX44267 precision, low-noise, low-drift dual opera-
tional amplifier offers true-zero output that allows the
output to cross zero maximizing the dynamic range of an
ADC and increasing resolution. In addition, the input com-
mon-mode range extends from +13.5V down to -12V. The
MAX44267 integrates charge-pump circuitry that gener-
ates the negative voltage rail in conjunction with external
capacitors. This allows the amplifier to operate from a
single +4.5V to +15V power supply, but it is as effective
as a normal dual-rail ±4.5V to ±15V amplifier. The archi-
tecture eliminates the need for a negative power-supply
rail, saving system cost and size.
The MAX44267 is unity-gain stable with a gain-bandwidth
product of 5MHz. The device features low offset voltage
of 50μV (max), drift of 0.4µV/°C (max), and 200nVP-P
noise from 0.1Hz to 10Hz. The low offset and noise
specifications and wide input common-mode range make
the device ideal for sensor transmitters and interfaces.
Varying the external charge pump capacitors enables the
charge-pump noise to be minimized.
The MAX44267 is part of a family of signal chain ICs
including amplifiers, multiplexers and ADCs. These ICs
eliminate the need for a negative supply to the multi-
plexer, amplifier and ADC, saving space and cost. See
the Typical Application Circuit and Table 1 for more infor-
mation. See the MAX44247 for the same amplifier with
internal charge-pump capacitors in a small 8-pin µMAX®
package.
The MAX44267 is available in a 14-pin TSSOP package
and is specified over the -40°C to +125°C operating tem-
perature range.
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Benefits and Features
●● True Bipolar Output Greater than ±10V from a Single
+15V Supply Eliminates Space and Cost of Negative
Power Supply
• True Zero Output from a Single Supply
●● High-Accuracy Sensing Over Temperature
• Low Input VOS: 50μV (max)
• Low 0.4µV/°C (max) of Offset Drift
●● 9nV/√Hz Low Input Noise at 1kHz Provides Wide
ADC Dynamic Range
●● 5MHz Gain-Bandwidth Product Provides Wide
Frequency Input Range
●● Low 2.4mA (max) Quiescent Current Enables Lower
Power Dissipation and Cooler Operation
●● Integrated EMI Filter Reduces Sensitivity to Motors
and Other High-Frequency Noise Generators
●● 14-Pin TSSOP Package with External Charge-Pump
Capacitors Enables Noise Optimization
Applications
●● PLC Analog I/O Modules
●● Sensor Interfaces
●● Pressure Sensors
●● Bridge Sensors
●● Analog Level Shifting/Conditioning
Block Diagram
AMPLIFIER A
OUTA
INA-
INA+
CFILT
+
1
2
VDD 14
CPVDD 13
CBYPASS
3 12 OUTB
4 GND
11 INB-
AMPLIFIER B
5 CPGND
10 INB+
6 VSS
CPVSS 9
7 CP
CN 8
MAX44267
CHOLD
CFLY
19-7455; Rev 0; 11/14
1 page  
MAX44267
+15V Single-Supply, Dual Op Amp
with ±10V Output Range
Typical Operating Characteristics (continued)
(VDD = VCPVDD = 15V, VGND = VCPGND = 0V, VCM = 0V, CFLY = 0.022µF, CHOLD = 0.1µF, CFILT = 0.1µF, RL = 5kΩ and CL = 10pF to
GND, TA = +25°C, unless otherwise noted.)
INPUT OFFSET CURRENT vs. TEMPERATURE
150 toc4b
100
50
0
-50
-100
-150
-200
-250
-300
-350
-400
-450
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
10 toc05
8
6
4
2
0
-2
-4
-6
-8
-10
-50 -25
0 25 50 75
TEMPERATURE (°C)
100 125
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
toc06
1000
100
10
1
1 10 100 1000 10000 100000
FREQUENCY (Hz)
INPUT CURRENT-NOISE DENSITY
vs. FREQUENCY
toc07
10000
0.1Hz TO 10Hz PEAK-TO-PEAK NOISE
toc08
1000
100nV/div
100
10
1
10 100 1000 10000 100000
FREQUENCY (Hz)
1s/div
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
0.01
PSRR vs. FREQUENCY
toc09
0.1 1 10 100 1000 10000
FREQUENCY (kHz)
CMRR vs. FREQUENCY
-20 toc10
-30 VDD = 15V
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
0.01 0.1 1 10 100 1000 10000
FREQUENCY (kHz)
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX44267
Pin Configuration
+15V Single-Supply, Dual Op Amp
with ±10V Output Range
TOP VIEW
OUTA
INA-
INA+
GND
CPGND
VSS
CP
1
2
3
4
5
6
7
+
MAX44267
14 VDD
13 CPVDD
12 OUTB
11 INB-
10 INB+
9 CPVSS
8 CN
TSSOP
Pin Description
PIN NAME
FUNCTION
1 OUTA Channel A Output
2 INA- Channel A Negative Input
3 INA+ Channel A Positive Input
4 GND Ground. Connect GND to a solid ground plane.
5 CPGND Charge-Pump Ground. Connect CPGND to GND.
6 VSS Filtered Negative Supply Output. Bypass VSS with a low-ESR capacitor (CFILT = 1µF) to GND.
7
CP
Charge-Pump Positive Capacitor Connection. Capacitor connection only to CN. Do not connect any
voltage on CP or CN. Connect a low-ESR capacitor (CFLY = 0.022µF) between CP and CN.
8
CN
Charge-Pump Negative Capacitor Connection. Capacitor connection only to CP. Do not connect any
voltage on CN or CP. Connect a low-ESR capacitor (CFLY = 0.022µF) between CP and CN.
9 CPVSS Charge Pump Negative Supply Output. Bypass CPVSS with a 0.1µF capacitor to CPGND.
10 INB+ Channel B Positive Input
11 INB- Channel B Negative Input
12 OUTB Channel B Output
13
CPVDD
Charge-Pump Supply Voltage Input. Connect CPVDD to VDD. Bypass CPVDD with a 0.1µF capacitor to
GND.
14 VDD Device Supply Voltage Input. Bypass VDD with a 0.1µF capacitor to GND.
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MAX44267.PDF ] | |
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