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PDF MAX4492 Data sheet ( Hoja de datos )
| Número de pieza | MAX4492 | |
| Descripción | Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70 | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1525; Rev 1; 1/00
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
General Description
The MAX4490/MAX4491/MAX4492 single/dual/quad,
low-cost CMOS op amps feature Rail-to-Rail® input and
output capability from either a single +2.7V to +5.5V
supply or dual ±1.35V to ±2.75V supplies. These ampli-
fiers exhibit a high slew rate of 10V/µs and a gain-band-
width product of 10MHz. They can drive 2kΩ resistive
loads to within 55mV of either supply rail and remain
unity-gain stable with capacitive loads up to 300pF.
The MAX4490 is offered in the ultra-small, 5-pin SC70
package, which is 50% smaller than the standard 5-pin
SOT23 package. Specifications for all parts are guaran-
teed over the automotive (-40°C to +125°C) tempera-
ture range.
Features
o +2.7V to +5.5V Single-Supply Operation
o 10V/µs Slew Rate
o Rail-to-Rail Input Common-Mode Voltage Range
o Rail-to-Rail Output Voltage Swing
o 10MHz Gain-Bandwidth Product
o Unity-Gain Stable with Capacitive Loads
Up to 300pF
o 50pA Input Bias Current
o Ultra-Small, 5-Pin SC70 Package (MAX4490)
Applications
Battery-Powered Instruments
Portable Equipment
Audio Signal Conditioning
Low-Power/Low-Voltage Applications
Sensor Amplifiers
RF Power Amplifier Control
High-Side/Low-Side Current Sensors
Ordering Information
PART
TEMP. RANGE
MAX4490AXK-T -40°C to +125°C
MAX4490AUK-T -40°C to +125°C
MAX4491AKA-T -40°C to +125°C
MAX4492AUD -40°C to +125°C
MAX4492ASD -40°C to +125°C
PIN-
PACKAGE
5 SC70-5
5 SOT23-5
8 SOT23-8
14 TSSOP
14 SO
TOP
MARK
AAB
ADKQ
AADB
—
—
Capacitive Load Stability
Pin Configurations/
Functional Diagrams
6000
5000
4000
3000
UNSTABLE
2000
1000
0
100
STABLE
1k 10k
RESISTIVE LOAD (Ω)
100k
TOP VIEW
MAX4490
IN+ 1
5 VDD
VSS 2
IN- 3
4 OUT
SOT23-5/SC70-5
Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
Pin Description
MAX4490
1
2
3
4
5
–
–
–
–
–
–
–
–
–
PIN
MAX4491
–
4
–
–
8
3
2
1
5
6
7
–
–
–
MAX4492
–
11
–
–
4
3
2
1
5
6
7
10, 12
9, 13
8, 14
NAME
IN+
VSS
IN-
OUT
VDD
INA+
INA-
OUTA
INB+
INB-
OUTB
INC+, IND+
INC-, IND-
OUTC, OUTD
FUNCTION
Noninverting Input
Negative Supply Input. Connect to ground for single-supply operation.
Inverting Input
Amplifier Output
Positive Supply Input
Noninverting Input to Amplifier A
Inverting Input to Amplifier A
Amplifier A Output
Noninverting Input to Amplifier B
Inverting Input to Amplifier B
Amplifier B Output
Noninverting Inputs to Amplifiers C and D
Inverting Inputs to Amplifiers C and D
Amplifiers C and D Outputs
Detailed Description
Rail-to-Rail Input Stage
The MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers have parallel-connected N- and P-channel
differential input stages that combine to accept a com-
mon-mode range extending to both supply rails. The N-
channel stage is active for common-mode input
voltages typically greater than (VSS + 1.2V), and the P-
channel stage is active for common-mode input volt-
ages typically less than (VDD - 1.2V).
Rail-to-Rail Output Stage
The MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers feature class-AB push-pull output stages that
can drive a 100kΩ load to within 1.5mV of either supply
rail. Short-circuit output current is typically ±50mA.
Figures 1a and 1b show the typical temperature depen-
dence of output source and sink currents, respectively,
for three fixed values of (VDD - VOH) and (VOL - VSS).
For example, at VDD = +5.0V, the load currents that
maintain (VDD - VOH) = 100mV and (VOL - VSS) = 100mV
at TA = +25°C are 2.2mA and 3.3mA, respectively,
when the load is connected to VDD/2. Consistent resis-
tive drive capability is (2.5 - 0.1) / 2.2 = 1.1kΩ. For the
same application, resistive drive capability is 2.2kΩ
when the load is connected to VDD or VSS.
Applications Information
Power-Supply Considerations
The MAX4490/MAX4491/MAX4492 operate from a sin-
gle +2.7V to +5.5V supply or from dual ±1.35V to
±2.75V supplies with typically 800µA supply current
per amplifier. A high power-supply rejection ratio of
100dB allows for extended operation from a decaying
battery voltage, thereby simplifying designs for
portable applications. For single-supply operation,
bypass the power supply with a 0.1µF ceramic capaci-
tor placed close to the VDD pin. For dual-supply opera-
tion, bypass each supply to ground.
Input Capacitance
One consequence of the parallel-connected differential
input stages for rail-to-rail operation is a relatively large
input capacitance CIN (typically 5pF). This introduces a
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MAX4492.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX4490 | Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70 | Maxim Integrated |
| MAX4490AUK-T | Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70 | Maxim Integrated |
| MAX4490AXK-T | Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70 | Maxim Integrated |
| MAX4491 | Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70 | Maxim Integrated |
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