MAX4494AKA-T [MAXIM]
SC70, Low-Power, General-Purpose, Dual-Supply, Rail-to-Rail Op Amps; SC70封装，低功耗，通用，双电源，轨至轨运算放大器
| 型号： | MAX4494AKA-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SC70, Low-Power, General-Purpose, Dual-Supply, Rail-to-Rail Op Amps |
| 文件： | 总11页 (文件大小：436K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1797; Rev 1; 10/01
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
General Description
Features
The MAX4493/MAX4494/MAX4495 single/dual/quad
general-purpose operational amplifiers are designed
for use in systems powered with dual supplies from
±±2±5ꢀ to ±525ꢀ2 These op amps proꢁide a unity-gain
bandwidth of 5MHz with only 770µA of quiescent cur-
rent per amplifier2 The wide input common-mode range
extends from ±00mꢀ beyond the negatiꢁe rail to within
125ꢀ of the positiꢁe supply rail while the output swings
ꢀ 770µA Supply Current per Amplifier
ꢀ Operates from Dual ±±2±ꢀ5 to ±ꢀ2ꢀ5 Supplies
ꢀ ꢀMHz Gain-Bandwidth Product
ꢀ Rail-to-Rail® Output Swing
ꢀ Input 5oltage Range Extends ±00m5 Below the
Negative Rail
within 10mꢀ (R = 100kΩ) of either rail2
L
ꢀ 110dB Open-Loop Gain (R = 100kΩ)
L
These amplifiers haꢁe excellent (110dB) open-loop
gain with ꢁery low THD+N of 0200±% (f = 1kHz)2 The
single MAX4493 is aꢁailable in a tiny 5-pin SC70 pack-
age and the dual MAX4494 is aꢁailable in the space-
saꢁing 8-pin SOT±32 The quad MAX4495 is aꢁailable in
both 14-pin TSSOP and 14-pin SO packages2 All prod-
ucts are rated at the automotiꢁe temperature range of
-40°C to +1±5°C2
ꢀ Low THD+N of 0200±% (f = 1kHz)
ꢀ No Phase Reversal for Overdriven Inputs
ꢀ Unity-Gain Stable
ꢀ Available in Space-Saving Packages
ꢀ-Pin SC70 (MAX4493)
8-Pin SOT±3 (MAX4494)
14-Pin TSSOP (MAX449ꢀ)
________________________Applications
Battery-Powered Systems
DAC Output Amplifiers
Industrial Control Systems
ꢀoltage Reference Generators
Signal Conditioning
Ordering Information
TEMP.
PIN-
TOP
PART
RANGE
PACKAGE
MARK
MAX4493AXK-T
MAX4493AUK-T
MAX4494AKA-T
MAX4494AUA
MAX4494ASA
MAX4495AUD
MAX4495ASD
-40°C to +125°C 5 SC70-5
-40°C to +125°C 5 SOT23-5
-40°C to +125°C 8 SOT23-8
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 SO
ABR
ADPG
AAEM
—
Typical Operating Characteristic
—
TOTAL HARMONIC DISTORTION PLUS
-40°C to +125°C 14 TSSOP
-40°C to +125°C 14 SO
—
NOISE vs. FREQUENCY
—
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.001
0
Pin Configurations
TOP VIEW
IN+
1
2
3
5
4
V
CC
MAX4493
V
EE
IN-
OUT
10
1k
100
FREQUENCY (Hz)
10k
100k
1
SC70/SOT23-5
Typical Operating Circuit appears at end of data sheet.
Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to V )................................................+12V
8-Pin SOT23 (derate 9.1mW/°C above +70°C)..........727mW
8-Pin µMAX (derate 4.5mW/°C above +70°C)...........362mW
8-Pin SO (derate 5.9mW/°C above +70°C)................471mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .......727mW
14-Pin SO (derate 8.3mW/°C above +70°C)..............667mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
EE
Voltage from Any Pin to Ground or
Any Other Pin.............................(V - 0.3V) to (V
+ 0.3V)
EE
CC
Output Short-Circuit Duration to
V , V
CC EE,
or Ground ............................................Continuous
Continuous Power Dissipation (T = +70°C)
A
5-Pin SC70 (derate 3.1mW/°C above +70°C)............247mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW
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.
DC ELECTRICAL CHARACTERISTICS
(V
(Note 1)
= +5V, V = -5V, R = 100kΩ to ground, T = -40°C to +125°C. Typical values are at T = +25°C, unless otherwise noted.)
EE L A A
CC
PARAMETER
SYMBOL
CONDITIONS
Guaranteed by PSRR test
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Range
V
2.25
5.5
V
S
Quiescent Supply Current per
Amplifier
I
770
0.3
1100
µA
S
T
T
= +25°C
5
A
A
Input Offset Voltage
V
mV
µV/°C
mV
OS
= T
to T
10
MIN
MAX
Input Offset Voltage Drift
TCV
3
1
OS
Input Offset Voltage Channel
Matching
MAX4494 and MAX4495
Input Bias Current
Input Offset Current
I
0.2
5
1
µA
nA
kΩ
B
I
300
OS
Differential mode (-1V ≤ V ≤ +1V)
250
IN
Input Resistance
R
IN
Common mode (V - 0.2V ≤ V
1.5V)
≤ V
-
CC
EE
CM
110
MΩ
Common-Mode Input Voltage
Range
V
0.2V
-
V
1.5V
-
CC
EE
V
Guaranteed by CMRR test
V
CM
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR
PSRR
V
V
- 0.2V ≤ V
≤ V - 1.5V
CC
65
65
90
80
dB
dB
EE
CM
=
2.25V to 5.5V
S
R = 100kΩ, V + 0.25V ≤ V
0.25V
≤ V
-
CC
L
EE
OUT
85
65
110
Large-Signal Voltage Gain
A
dB
VOL
R = 1kΩ, V + 0.5V ≤ V
≤ V - 0.5V
CC
90
10
L
EE
OUT
R = 100kΩ, V
- V
OH
and V - V
EE
150
450
L
CC
OL
Output Voltage Swing
V
mV
mA
OUT
R = 1kΩ, V
- V
and V - V
EE
200
15
L
CC
OH
OL
Output Short-Circuit Current
I
Sourcing or sinking
SC
Note 1: All devices are 100% production tested at T = +25°C. Limits over the operating temperature range are guaranteed by
A
design and not production tested.
2
_______________________________________________________________________________________
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
AC ELECTRICAL CHARACTERISTICS
(V
= +5V, V = -5V, R = 100kΩ to ground, C = 15pF, T = +25°C, unless otherwise noted.)
CC
EE
L
L
A
PARAMETER
SYMBOL
GBWP
FPBW
SR
CONDITIONS
MIN
TYP
5
MAX
UNITS
MHz
Gain-Bandwidth Product
Full-Power Bandwidth
Slew Rate
V
= 5Vp-p
= 5Vp-p
190
3
kHz
OUT
OUT
V
V/µs
Phase Margin
75
15
degrees
dB
Gain Margin
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, V
= 5Vp-p, A = +1V/V
0.002
%
OUT
V
Settling Time to 0.01%
Input Capacitance
t
A
= +1V/V, V = 5V step
OUT
4
2
µs
pF
S
V
C
IN
IN
Input Noise Voltage Density
Input Noise Current Density
All-Hostile Crosstalk
e
f = 1kHz
f = 1kHz
8
nV/√Hz
pA/√Hz
dB
i
IN
0.2
-100
300
3
f = 1kHz, MAX4494 and MAX4495
A = +1V/V, no sustained oscillations
Capacitive-Load Stability
Power-Up Time
pF
V
t
V
= 1V, 1µs power supply rise-time
OUT
µs
ON
Typical Operating Characteristics
(V
= +5V, V = -5V, V
= 0, R = 100kΩ to ground, C = 15pF, T = +25°C, unless otherwise noted.)
CM L L A
CC
EE
INPUT OFFSET VOLTAGE
vs.TEMPERATURE
INPUT BIAS CURRENT
vs.TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
800
700
600
500
400
300
275
250
225
200
900
875
850
825
800
775
750
725
700
675
650
625
600
V
= 5V
SUPPLY
300
200
175
150
V
= 2.5V
SUPPLY
100
0
125
100
-50 -25
0
25
50
75 100 125
-50 -25
0
25
75 100 125
-50 -25
0
25
75 100 125
50
50
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, V
= 0, R = 100kΩ to ground, C = 15pF, T = +25°C, unless otherwise noted.)
CM L L A
CC
EE
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
COMMON-MODE REJECTION
vs. FREQUENCY
POWER-SUPPLY REJECTION vs. FREQENCY
(V
=
2.5V to 5.5V)
SUPPLY
-40
-50
400
0
-20
V
= 2.5V
350
300
250
200
150
100
50
SUPPLY
-60
-40
V
= 5V
SUPPLY
-70
-60
-80
-80
-100
-120
-90
0
-100
-5.0
-2.5
0
2.5
5.0
1
10
100
1k
10k
100k 1M
100
1k
10k
100k
COMMON-MODE VOLTAGE (V)
FREQUENCY (Hz)
FREQUENCY (Hz)
OUTPUT VOLTAGE SWING
INPUT VOLTAGE NOISE DENSITY
vs. FREQUENCY
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
vs. TEMPERATURE (R = 100kΩ)
L
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.001
0
100
10
1
20
18
16
14
12
10
8
V
- V
EE
OL
V
- V
OH
CC
6
4
2
0
-50 -25
0
25
50
75 100 125
10
1k
10k
100k
1
10
100
1k
10k
100k
1M
1
100
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN
vs. TEMPERATURE
OUTPUT VOLTAGE SWING
vs. TEMPERATURE (R = 1kΩ)
GAIN AND PHASE vs. FREQUENCY
L
MAX4493-12
275
250
140
120
100
80
270
225
180
60
50
40
30
A = +1000V/V
V
R = 100kΩ
EE
L
V
225
200
175
150
125
+ 0.25V ≤ V
≤ V - 0.25V
CC
OUT
135
GAIN
V
- V
OH
CC
90
45
20
10
0
0
-45
R = 1kΩ
L
-10
-20
-30
-40
-50
-60
V
EE
+ 0.5V ≤ V
≤ V - 0.5V
CC
OUT
V
- V
100
75
OL
EE
-90
PHASE
100k
-135
-180
-225
-270
60
50
25
0
40
-50 -25
0
25
75 100 125
50
-50 -25
0
25
50
75 100 125
0.1k
1k
10k
1M
10M 100M
FREQUENCY (Hz)
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, V
= 0, R = 100kΩ to ground, C = 15pF, T = +25°C, unless otherwise noted.)
CM L L A
CC
EE
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
GAIN AND PHASE vs. FREQUENCY
(C = 300pF)
SWING (R TO V , V = +5V, V = -5V)
L
CC CC
EE
L
MAX4493-13
60
50
40
30
120
115
110
105
100
95
270
225
180
135
90
A = +1000V/V
V
R = 100kΩ
L
20
10
GAIN
R = 10kΩ
45
0
L
0
-10
-20
-30
-40
-45
-90
-135
-180
-225
-270
R = 1kΩ
L
PHASE
90
85
-50
-60
0.1k
80
1k
10k
100k
1M
10M 100M
8.8
9.0
9.2
9.4
9.6
9.8
10.0
TOTAL OUTPUT VOLTAGE SWING (V
)
FREQUENCY (Hz)
P-P
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
SWING (R TO V , V = +5V, V = -5V)
LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE
SWING (R TO V , V = +2.25V, V = -2.25V)
SWING (R TO V , V = +2.25V, V = -2.25V)
L
EE CC
EE
L
EE CC
EE
L
CC CC
EE
120
120
115
110
105
115
110
105
100
115
R = 100kΩ
L
R = 100kΩ
110
105
100
R = 100kΩ
L
L
R = 10kΩ
L
95
R = 10kΩ
L
R = 10kΩ
L
95
90
100
95
90
85
80
90
85
R = 1kΩ
L
R = 1kΩ
L
85
80
R = 1kΩ
L
80
75
70
75
70
3.4
3.6
3.8
4.0
4.2
4.4
8.8
9.0
9.2
9.4
9.6
9.8
10.0
3.4
3.6
3.8
4.0
4.2
4.4
TOTAL OUTPUT VOLTAGE SWING (V
)
P-P
TOTAL OUTPUT VOLTAGE SWING (V
)
P-P
TOTAL OUTPUT VOLTAGE SWING (V
)
P-P
MAX4494/MAX4495
CROSSTALK vs. FREQUENCY
LARGE-SIGNAL TRANSIENT RESPONSE
0
-20
INPUT VOLTAGE
(2V/div)
-40
-60
OUTPUT VOLTAGE
(2V/div)
-80
-100
-120
10k
100k
1M
10M
10µs/div
FREQUENCY (Hz)
_______________________________________________________________________________________
5
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, V
= 0, R = 100kΩ to ground, C =15pF, T = +25°C, unless otherwise noted.)
CM L L A
CC
EE
LARGE-SIGNAL CAPACITIVE-LOAD STABILITY
SMALL-SIGNAL CAPACITIVE-LOAD STABILITY
SMALL-SIGNAL TRANSIENT RESPONSE
(C = 1200pF)
L
(C = 300pF)
L
10µs/div
200ns/div
200ns/div
LARGE-SIGNAL TRANSIENT RESPONSE
SMALL-SIGNAL TRANSIENT RESPONSE
(R = 15Ω, C = 0.01µF)
(R = 15Ω, C = 1000pF)
ISO
L
ISO
L
200ns/div
10µs/div
STABILITY vs. CAPACITIVE
AND RESISTIVE LOADS
POWER-UP TIME (V = +1V)
IN
1000
10
900
800
700
600
500
400
300
200
100
0
V
- V
EE
CC
(4V/div)
0
1V
STABLE
REGION
OUTPUT VOLTAGE
(500mV/div)
0
1k
10k
100k
10µs/div
R
(Ω)
LOAD
6
_______________________________________________________________________________________
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Pin Description
PIN
NAME
FUNCTION
MAX4493
MAX4494
MAX4495
—
—
—
—
—
—
—
—
—
—
—
—
4
1
2
1
2
OUTA
INA-
Channel A Output
Channel A Inverting Input
Channel A Noninverting Input
Channel B Output
3
3
INA+
OUTB
INB-
7
7
6
6
Channel B Inverting Input
Channel B Noninverting Input
Channel C Output
5
5
INB+
OUTC
INC-
INC+
OUTD
IND-
IND+
OUT
IN+
—
—
—
—
—
—
—
—
—
8
8
9
Channel C Inverting Input
Channel C Noninverting Input
Channel D Output
10
14
13
12
—-
—
—
4
Channel D Inverting Input
Channel D Noninverting Input
Output
1
Noninverting Input
3
IN-
Inverting Input
5
V
Positive Supply
CC
2
4
11
V
Negative Supply
EE
Capacitive-Load Stability graph in the Typical
Operating Characteristics gives the stable operation
region for capacitive versus resistive load. Stability with
higher capacitive loads can be improved by adding an
isolation resistor in series with the op-amp output, as
shown in Figure 1. This resistor improves the circuit’s
phase margin by isolating the load capacitor from the
amplifier’s output. As seen in the Typical Operating
Characteristics, driving capacitive loads with an isola-
tion resistor exhibits some overshoot, but no oscillation.
Applications Information
Rail-to-Rail Output Stage
The MAX4493/MAX4494/MAX4495 output stage can
drive up to 1kΩ and still swing within 200mV of the rails.
Capacitive-Load Stability
Driving large capacitive loads can cause instability in
many op amps. The MAX4493/MAX4494/MAX4495 are
stable with capacitive loads up to 300pF. The
Full-Power Bandwidth
The FPBW is given by:
SR
R
ISO
FPBW(Hz) =
OUTPUT
π V
[
OUTp−p(max)
]
MAX4493
C
L
INPUT
Figure 1. Capacitive Load Driving Circuit
_______________________________________________________________________________________
7
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
where the slew rate (SR) is 3V/µs. Figure 2 shows the
full-power bandwidth as a function of the peak-to-peak
AC output voltage.
BANDWIDTH
vs. OUTPUT VOLTAGE SWING
100M
10M
1M
Power-Up Conditions
The MAX4493/MAX4494/MAX4495 typically settle with-
in 3µs after power-up. See Power-Up Time in Typical
Operating Characteristics.
A
= +1V/V
V
Power Supplies and Layout
The MAX4493/MAX4494/MAX4495 operate with dual
supplies from 2.25V to 5.5V. Bypass both V
EE
and
CC
V
with their own 0.1µF capacitor to ground.
Good layout technique helps optimize performance by
decreasing the amount of stray capacitance at the op
amp’s inputs and outputs. To decrease stray capaci-
tance, minimize trace lengths by placing external com-
ponents close to the op amp’s pins.
100k
0
1
2
3
4
5
V
(Vp-p)
OUT
Figure 2. Bandwidth vs. Peak-to-Peak AC Voltage Plot
Pin Configurations (continued)
TOP VIEW
TOP VIEW
OUTA
INA-
1
2
3
4
5
6
7
14 OUTD
13 IND-
12 IND+
OUTA
INA-
1
2
3
4
8
7
6
5
V
CC
INA+
OUTB
INB-
V
11
V
EE
MAX4495
CC
MAX4494
INA+
INB+
INB-
10 INC+
9
8
INC-
V
EE
INB+
OUTB
OUTC
SO/SOT23/µMAX
SO/TSSOP
Chip Information
Typical Operating Circuit
MAX4493 TRANSISTOR COUNT: 81
MAX4494 TRANSISTOR COUNT: 159
MAX4495 TRANSISTOR COUNT: 318
PROCESS: Bipolar
R
R
f
g
+5V
+5V
0.1µF
0.1µF
R
ISO
V
OUT
MAX4493
REF
DAC
0.1µF
0.1µF
-5V
-5V
8
_______________________________________________________________________________________
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Package Information
_______________________________________________________________________________________
9
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Package Information (continued)
10 ______________________________________________________________________________________
SC70, Low-Power, General-Purpose,
Dual-Supply, Rail-to-Rail Op Amps
Package Information (continued)
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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