LMX324AUD+B3Q [MAXIM]
Operational Amplifier, 4 Func, 9000uV Offset-Max, BIPolar, PDSO14;
| 型号： | LMX324AUD+B3Q |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Operational Amplifier, 4 Func, 9000uV Offset-Max, BIPolar, PDSO14 放大器 光电二极管 |
| 文件： | 总15页 (文件大小：496K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2103; Rev 1; 10/06
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
General Description
Features
♦ Upgrade to LMV321/LMV358/LMV324 Family
The LMX321/LMX358/LMX324 are single/dual/quad,
low-cost, low-voltage, pin-to-pin compatible upgrades
to the LMV321/LMV358/LMV324 family of general pur-
pose op amps. These devices offer rail-to-rail outputs
and an input common-mode range that extends below
ground. These op amps draw only 105µA of quiescent
current per amplifier, operate from a single +2.3V to
+7V supply, and drive 2kΩ resistive loads to within
40mV of either rail. The LMX321/LMX358/LMX324 are
unity-gain stable with a 1.3MHz gain-bandwidth prod-
uct capable of driving capacitive loads up to 400pF.
The combination of low voltage, low cost, and small
package size makes these amplifiers ideal for
portable/battery-powered equipment.
♦ Single +2.3V to +7V Supply Voltage Range
♦ Available in Space-Saving Packages
5-Pin SC70 (LMX321)
8-Pin SOT23 (LMX358)
14-Pin TSSOP (LMX324)
♦ 1.3MHz Gain-Bandwidth Product
♦ 105µA Quiescent Current per Amplifier
(V
= +2.7V)
CC
♦ No Phase Reversal for Overdriven Inputs
♦ No Crossover Distortion
♦ Rail-to-Rail Output Swing
The LMX321 single op amp is available in ultra-small 5-
pin SC70 and space-saving 5-pin SOT23 packages. The
LMX358 dual op amp is available in the tiny 8-pin SOT23
♦ Input Common-Mode Voltage Range: V - 0.2V
EE
to V
- 0.8V
CC
®
or the 8-pin µMAX package. The LMX324 quad op amp
♦ Drives 2kΩ Resistive Loads
is available in 14-pin TSSOP and SO packages.
Ordering Information
Applications
PKG
CODE
PIN-
PACKAGE
PART
TEMP RANGE
Cellular Phones
X5-1
U5-1
K8-2
S8-2
Laptops
LMX321AXK-T
LMX321AUK-T
LMX358AKA-T
LMX358ASA
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
5 SC70-5
5 SOT23-5
8 SOT23-8
8 SO
Low-Power, Low-Voltage Applications
Portable/Battery-Powered Equipment
Cordless Phones
U8-1
S14-4
U14-1
LMX358AUA-T
LMX324ASD
LMX324AUD
8 µMAX-8
14 SO
Active Filters
14 TSSOP
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
OUT1
IN1-
1
2
3
4
5
6
7
OUT4
14
IN+
V
CC
1
2
3
5
4
OUT1
IN1-
V
CC
1
2
3
4
8
7
LMX321
LMX358
V
EE
OUT2
IN2-
IN4-
IN4+
13
12
OUT
IN1+
IN-
IN1+
6
5
SC70-5/SOT23-5
V
CC
11 V
EE
IN2+
V
EE
LMX324
SOT23-8/SO/µMAX
IN2+
IN2-
10 IN3+
9
8
IN3-
OUT3
OUT2
TSSOP/SO
________________________________________________________________ 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.
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
Differential Input Voltage (V
to V ) ....................................-0.3V to +8V
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
8-Pin µMAX (derate 4.5mW/°C above +70°C).............362mW
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
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
EE
- V ) ........................V to V
IN+
IN- EE CC
OUT_ to V ...............................................-0.3V to (V
+ 0.3V)
EE
CC
Output Short-Circuit Duration
OUT_ Shorted to V
Continuous Power Dissipation (T = +70°C)
5-Pin SC70-5 (derate 3.1mW/°C above +70°C)...........247mW
5-Pin SOT23-5 (derate 7.1mW/°C above +70°C) ........571mW
8-Pin SOT23-8 (derate 7.52mW/°C above +70°C) ......602mW
or V ..................................Continuous
CC
EE
A
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.
ELECTRICAL CHARACTERISTICS
(V
= +2.7V, V = 0V, V
= V /2, V
= 1V, R > 1MΩ, T = +25°C, unless otherwise noted.)
CC
EE
OUT
CC
CM
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Offset Voltage
V
1
6
6
mV
OS
Input Offset Voltage Average
Drift
TCV
µV/oC
OS
Input Bias Current
Input Offset Current
I
18
1
50
8
nA
nA
B
I
OS
Common-Mode Rejection
Ratio
CMRR
PSRR
-0.2V < V
< 1.8V
72
92
96
dB
dB
CM
Power-Supply Rejection Ratio
2.3V < V
< 7V, V
= 1V
OUT
82
-0.2
-0.2
20
CC
Limit
+1.8
+1.9
Input Common-Mode Voltage
Range
V
For CMRR > 72dB
R = 2kΩ to V , 0.3V < V
V
CM
Typ
OUT
Large-Signal Voltage Gain
A
< 2.4V
120
12
V/mV
VOL
L
EE
V
V
V
V
- V
50
40
CC
OL
CC
OL
OH
R = 10kΩ to 1.35V
L
10
Output-Voltage Swing
V
mV
µA
OUT
- V
40
110
60
OH
R = 2kΩ to 1.35V
L
25
LMX321 (single)
LMX358 (dual)
LMX324 (quad)
105
210
420
150
300
600
Supply Current
I
CC
AC CHARACTERISTICS
Slew Rate
SR
1V step Input
1
1.3
64
V/µs
MHz
Gain-Bandwidth Product
Phase Margin
GBW
C = 200pF
L
degrees
φ
M
Gain Margin
GM
24
dB
Input Noise-Voltage Density
Input Current-Noise Density
e
f = 1kHz
f = 1kHz
66
nV/√Hz
pA/√Hz
n
i
n
0.13
2
_______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
ELECTRICAL CHARACTERISTICS
(V
= +2.7V, V = 0V, V
= V /2, V
= 1V, R > 1MΩ, T = -40°C to +125°C, unless otherwise noted.) (Note 1)
CC
EE
OUT
CC
CM
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Offset Voltage
Input Bias Current
V
9
mV
nA
nA
OS
I
70
15
B
Input Offset Current
I
OS
Common-Mode Rejection
Ratio
CMRR
PSRR
-0.1 < V
< +1.7V
60
dB
dB
CM
Power-Supply Rejection Ratio
2.3V < V < 7V, V
CC
= 1V
75
-0.1
-0.1
10
OUT
Limit
Typ
< 2.4V
+1.7
+1.8
Input Common-Mode Voltage
Range
V
For CMRR > 60dB
V
CM
Large-Signal Voltage Gain
A
R = 2kΩ to V , 0.3V < V
L
V/mV
VOL
EE
OUT
V
V
V
V
- V
130
50
CC
OL
CC
OL
OH
R = 10kΩ to 1.55V
L
Output-Voltage Swing
V
mV
µA
OUT
- V
150
70
OH
R = 2kΩ to 1.35V
L
LMX321 (single)
LMX358 (dual)
LMX324 (quad)
180
360
720
Supply Current
I
CC
ELECTRICAL CHARACTERISTICS
(V
= +5V, V = 0V, V
= V /2, V
= 2V, R > 1MΩ, T = +25°C, unless otherwise noted.)
CM L A
CC
EE
OUT
CC
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Offset Voltage
V
1
6
6
mV
µV/oC
nA
OS
Input Offset Voltage Average Drift
Input Bias Current
TCV
OS
I
18
1
50
8
B
Input Offset Current
I
nA
OS
Force 100µA into IN+, IN- =
GND measure V
Figure 1
- V
,
Input Differential Clamp Voltage
V
3.1
V
IN+
IN-
CLAMP
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR
PSRR
-0.2 < V
< +4.1V
72
82
92
96
dB
dB
CM
2.3V < V
< 7V, V
= 1V,
CC
OUT
V
= 1V
CM
Limit
Typ
-0.2
-0.2
+4.1
+4.2
Input Common-Mode Voltage
Range
V
For CMRR > 72dB
V
CM
R = 2kΩ to V
,
EE
L
Large-Signal Voltage Gain
A
40
200
V/mV
VOL
0.3V < V
< 4.7V
OUT
_______________________________________________________________________________________
3
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(V
= +5V, V = 0V, V
= V /2, V
= 2V, R > 1MΩ, T = +25°C, unless otherwise noted.)
CM L A
CC
EE
OUT
CC
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
20
MAX
60
UNITS
V
V
V
V
- V
- V
CC
OL
CC
OL
OH
R = 10kΩ to 2.5V
L
12
40
Output-Voltage Swing
V
mV
OUT
65
130
80
OH
R = 2kΩ to 2.5V
L
40
Sourcing, V
= 0V
5
25
OUT
Output Short-Circuit Current
Supply Current
I
mA
µA
SC
Sinking, V
= 5V
10
28
OUT
LMX321 (single)
LMX358 (dual)
LMX324 (quad)
120
240
480
170
340
680
I
CC
AC CHARACTERISTICS
Slew Rate
SR
3V step input
1
1.3
65
V/µs
MHz
Gain-Bandwidth Product
Phase Margin
GBW
C = 200pF
L
φ
degrees
dB
M
Gain Margin
GM
25
Input Noise-Voltage Density
Input Noise-Current Density
e
f = 1kHz
f = 1kHz
65
nV/√Hz
pA/√Hz
n
i
n
0.13
ELECTRICAL CHARACTERISTICS
(V
= +5V, V = 0V, V
= V /2, V
= 2V, R > 1MΩ, T = -40°C to +125°C, unless otherwise noted.) (Note 1)
CC
EE
OUT
CC
CM
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Offset Voltage
V
9
mV
nA
nA
dB
dB
OS
Input Bias Current
I
70
15
B
Input Offset Current
I
OS
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR
PSRR
-0.1 < V
< +4.0V
63
75
CM
2.3V < V
< 7V, V
= 1V, V = 1V
CM
CC
OUT
Limit
-0.1
-0.1
20
+4.0
+4.1
Input Common-Mode Voltage
Range
V
For CMRR > 63dB
V
CM
Typ
Large-Signal Voltage Gain
A
R = 2kΩ to V , 0.3V < V < 4.7V
OUT
V/mV
VOL
L
EE
V
V
V
V
- V
170
70
CC
OH
R = 10kΩ to 2.5V
L
OL
CC
OL
Output-Voltage Swing
V
mV
µA
OUT
- V
190
90
OH
R = 2kΩ to 2.5V
L
LMX321 (single)
LMX358 (dual)
LMX324 (quad)
210
420
840
Supply Current
I
CC
Note 1: Specifications are 100% tested at T = +25°C (exceptions noted). All temperature limits are guaranteed by design.
A
4
_______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Typical Operating Characteristics
(T = +25°C, V = 0V, unless otherwise noted.)
A
EE
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
INPUT BIAS CURRENT
vs. DIFFERENTIAL INPUT VOLTAGE
INPUT BIAS CURRENT
vs. TEMPERATURE
160
140
120
100
80
400
300
200
100
0
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
V
= 5V
CC
T
= +125°C
A
T
= +85°C
A
T
= +25°C
A
60
-100
-200
-300
-400
40
T
= -40°C
A
20
V
= +5V, V = V /2
IN CC
CC
0
0
1
2
3
4
5
6
7
-40 -25 -10
5
20 35 50 65 80 95 110 125
-5 -4 -3 -2 -1
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
DIFFERENTIAL INPUT VOLTAGE (V)
SOURCE CURRENT
vs. OUTPUT VOLTAGE
SOURCE CURRENT
vs. OUTPUT VOLTAGE
SINK CURRENT
vs. OUTPUT VOLTAGE
100
10
100
10
100
10
V
= 2.7V
V
= 2.7V
CC
V
= 5V
CC
CC
1
1
1
0.1
0.01
0.1
0.01
0.1
0.01
0.01
0.1
1
10
0.01
0.1
1
10
0.001
0.01
0.1
1
10
OUTPUT VOLTAGE REFERENCED TO V (V)
CC
OUTPUT VOLTAGE REFERENCED TO V (V)
CC
OUTPUT VOLTAGE REFERENCED TO V (V)
EE
SINK CURRENT
vs. OUTPUT VOLTAGE
OUTPUT VOLTAGE SWING
vs. SUPPLY VOLTAGE
OUTPUT VOLTAGE SWING
vs. SUPPLY VOLTAGE
100
10
100
90
80
70
60
50
40
30
20
35
30
25
20
15
10
5
V
= 5V
CC
R = 2kΩ
L
R = 10kΩ
L
POSITIVE SWING
POSITIVE SWING
(V - V
(V - V
CC
)
)
OH
OH
CC
1
0.1
NEGATIVE SWING (V
)
OL
NEGATIVE SWING (V
)
OL
0.01
0.001
0.01
0.1
1
10
2
3
4
5
6
7
2
3
4
5
6
7
OUTPUT VOLTAGE REFERENCED TO V (V)
SUPPLY VOLTAGE (V)
EE
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Typical Operating Characteristics (continued)
(T = +25°C, V = 0V, unless otherwise noted.)
A
EE
INPUT VOLTAGE NOISE
vs. FREQUENCY
CROSSTALK REJECTION
vs. FREQUENCY
INPUT CURRENT NOISE
vs. FREQUENCY
600
550
500
450
400
350
300
250
200
150
100
50
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= 5V, R = 5kΩ
L
V
= 2.7V TO 5V, V = V /2
CM CC
CC
V
= 2.7V TO 5V, V = V /2
CM CC
CC
CC
-50
-70
-90
-110
-130
-150
0
1
10
100
1k
10k
100k
1M
3
100
1k
10k
100k 1M
10M 100M
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
0.15
0.10
0.05
0
0
-20
0.10
0.05
0
V
= 2.5V, V = -2.5V
V
= 2.7V TO 5V
V
= 1.35V, V = -1.35V
CC
EE
CC
CC
EE
PSRR-
-40
PSRR+
-60
-0.05
-0.10
-0.15
-0.20
-0.05
-0.10
-0.15
-0.20
-80
-100
-120
100
1k
10k
FREQUENCY (Hz)
100k
-1.7
-1.2
-0.7
-0.2
0.3
0.8
-2.8 -2.3 -1.8 -1.3 -0.8 -0.3 0.2 0.7 1.2 1.7 2.2
COMMON-MODE VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
INPUT OFFSET VOLTAGE
vs. OUTPUT VOLTAGE
INPUT OFFSET VOLTAGE
vs. OUTPUT VOLTAGE
GAIN AND PHASE vs. FREQUENCY
and RESISTIVE LOAD
LMX321 toc18
100
75
50
40
30
20
10
0
100
80
60
40
20
0
100
75
V
= 2.5V, V = -2.5V
EE
V
= +1.35V, V = -1.35V
EE
CC
CC
R = 600Ω
L
R = 600Ω
L
50
R = 100kΩ
L
50
25
25
R = 2kΩ
L
R = 2kΩ
L
0
0
R = 600Ω
L
R = 10kΩ
R = 10kΩ
-25
-50
-75
-100
L
-25
-50
-75
100
L
V
= 2.5V, V = -2.5V
EE
CC
-10
-20
-20
-40
C = 0pF, R TO V
L
L
EE
= 0V
R = 100kΩ
L
A
= 60dB, V
VCL
OUT
-3
-2
-1
0
1
2
10k
100k
1M
10M
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
OUTPUT VOLTAGE (V)
FREQUENCY (Hz)
OUTPUT VOLTAGE (V)
6
_______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Typical Operating Characteristics (continued)
(T = +25°C, V = 0V, unless otherwise noted.)
A
EE
GAIN AND PHASE vs. FREQUENCY
AND CAPACITIVE LOAD
GAIN AND PHASE vs. FREQUENCY
AND CAPACITIVE LOAD
GAIN AND PHASE vs. FREQUENCY
and RESISTIVE LOAD
LMX321 toc20
LMX321 toc21
LMX321 toc19
50
40
30
20
10
0
100
80
60
40
20
0
50
40
30
20
10
0
100
80
60
40
20
0
50
40
30
20
10
0
100
80
60
40
20
0
R = 600Ω
C = 0
C = 100pF
L
L
L
C = 500pF
L
C = 0
L
R = 100kΩ
L
C = 1nF
L
C = 500pF
L
C = 1nF
L
C = 1nF
L
C = 500pF
L
R = 600Ω
L
C = 100pF
L
V
= 2.5V, V = -2.5V
EE
V
= 1.35V, V = -1.35V
EE
CC
L
CC
L
V
= 2.5V, V = -2.5V
CC EE
L EE
-10
-20
-20
-40
-10
-20
-20
-40
-10
-20
-20
-40
R = 600Ω TO V
A
C = 0, R TO V
A
EE
L
EE
R = 100kΩ TO V
A
= 60dB, V
= 0V
R = 100kΩ
= 0V
OUT
= 60dB, V
VCL
OUT
L
VCL
= 60dB, V
= 0V C = 0
OUT
L
VCL
10k
100k
1M
10M
10k
100k
1M
10M
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
GAIN AND PHASE vs. FREQUENCY
AND TEMPERATURE
SLEW RATE vs.
SUPPLY VOLTAGE
CAPACITIVE-LOAD STABILITY
LMX321 toc22
50
40
30
20
10
0
100
80
60
40
20
0
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
4000
3500
3000
2500
2000
1500
1000
500
T
= -40°C
R = 10kΩ
L
A
V
IN
= 1V STEP, A = +1V/V
VCL
T
= +25°C
A
UNSTABLE
T
= -40°C
A
RISING EDGE
T
= +25°C
A
T
= +85°C
A
T
= +85°C
A
T
= -25°C
A
T
= +125°C
A
FALLING EDGE
STABLE
V
= 2.5V, V = -2.5V
EE
CC
-10
-20
-20
-40
R = 2kΩ TO V
L
EE
A
= 60dB, V = 0V
VCL
OUT
0
10k
100k
1M
10M
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
100
1k
10k
100k
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
NONINVERTING
LARGE-SIGNAL RESPONSE
NONINVERTING
SMALL-SIGNAL RESPONSE
LMX321 toc25
LMX321 toc26
10
1
R = 2kΩ
R = 2kΩ
L
L
V
= 5V
V
= 5V
CC
CC
V
= 2.7V, A = +10, V
= 1V
OUT P-P
V
CC
V
V
IN
IN
1V/div
100mV/div
V
= 5V, A = +10, V
= 2.5V
OUT P-P
CC
V
0.1
V
V
OUT
OUT
1V/div
100mV/div
V
= 2.7V, A = +1, V
= 1V
OUT P-P
CC
V
0.01
0.001
V
= 5V, A = +1, V
V
= 2.5V
OUT P-P
CC
10
100
1k
FREQUENCY (Hz)
10k
100k
1µs/div
1µs/div
_______________________________________________________________________________________
7
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Typical Operating Characteristics (continued)
(T = +25°C, V = 0V, unless otherwise noted.)
A
EE
OUTPUT IMPEDANCE
vs. FREQUENCY
SHORT-CIRCUIT CURRENT
vs. TEMPERATURE (SINKING)
SHORT-CIRCUIT CURRENT
vs. TEMPERATURE (SOURCING)
40
35
30
25
20
40
35
30
25
20
1000
100
10
V
A
= 2.7V TO 5V
CC
= +1V/V
VCL
V
= 5V
CC
V
= 5V
CC
V
= 2.7V
CC
V
= 2.7V
CC
1
15
10
15
10
0.01
0.001
5
0
5
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
-40 -25 -10
5
20 35 50 65 80 95 110 125
100
1k
10k
100k
1M
10M 100M
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (Hz)
Pin Description
PIN
LMX358
—
NAME
FUNCTION
LMX321
LMX324
1
—
IN+
Noninverting Amplifier Input
Negative Supply. Connect to ground for single-supply
operation.
2
4
11
V
EE
3
—
—
8
—
—
4
IN-
Inverting Amplifier Input
Output
4
OUT
5
V
Positive Supply
CC
—
—
—
—
—
—
—
—
—
—
—
—
1
1
OUT1
IN1-
Output for Amplifier 1
2
2
Inverting Input for Amplifier 1
Noninverting Input for Amplifier 1
Output for Amplifier 2
3
3
IN1+
OUT2
IN2-
7
7
6
6
Inverting Input for Amplifier 2
Noninverting Input for Amplifier 2
Output for Amplifier 3
5
5
IN2+
OUT3
IN3-
—
—
—
—
—
—
8
9
Inverting Input for Amplifier 3
Noninverting Input for Amplifier 3
Output for Amplifier 4
10
14
13
12
IN3+
OUT4
IN4-
Inverting Input for Amplifier 4
Noninverting Input for Amplifier 4
IN4+
8
_______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
3.5kΩ
R
L
C
L
LMX321
LMX358
LMX324
3.5kΩ
Figure 3. Capacitive-Load-Driving Circuit
Figure 1. Input Protection Circuit
V
IN
V
= 5V, V = 0V, C = 2.2nF, R = 2kΩ
EE L L
CC
2V/div
2.6V
2.4V
V
IN
2.5V
100mV/div
V
OUT
2.6V
2.4V
1V/div
V
OUT
100mV/div
-2.5V
200µs/div
= 2.5V, V = -2.5V, A = 2V/V
4µs/div
V
CC
EE
VCL
Figure 4. Output With Excessive Capacitive Load
Figure 2. Rail-to-Rail Output Swing
Rail-to-Rail Output Stage
Detailed Description
The LMX321/LMX358/LMX324 drive 2kΩ loads and still
typically swing within 40mV of the supply rails. Figure 2
shows the output voltage swing of the LMX321 config-
Input Protection Circuit
The LMX321/LMX358/LMX324’s inputs are protected
from large differential input voltages by internal 3.5kΩ
series resistors and back-to-back triple diode stacks
across the inputs (Figure 1). For differential input volt-
ages (much less than 1.8V), input resistance is typically
3MΩ. For differential input voltages greater than 1.8V,
input resistance is around 7kΩ, and the input bias cur-
rent can be approximated by the following equation:
ured with A
= +2V/V.
VCL
Driving Capacitive Loads
Driving a capacitive load can cause instability in many
op amps, especially those with low quiescent current.
The LMX321/LMX358/LMX324 are unity-gain stable for
a range of capacitive loads to above 400pF. Figure 4
shows the response of the LMX321 with an excessive
capacitive load. Adding a series resistor between the
output and the load capacitor (Figure 5) improves the
circuit’s response by isolating the load capacitance
from the op amp’s output.
I
= (V
- 1.8V) / 7kΩ
DIFF
BIAS
In the region where the differential input voltage
approaches 1.8V, input resistance decreases exponen-
tially from 3MΩ to 7kΩ as the diode block begins con-
ducting. Inversely, the bias current increases with the
same curve.
_______________________________________________________________________________________
9
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
R
ISO
V
CC
2V/div
C
L
LMX321
LMX358
LMX324
V
OUT
Figure 5. Capacitive-Load-Driving Circuit With Isolation
Resistor
1V/div
Applications Information
4µs/div
Power-Up
The LMX321/LMX358/LMX324 outputs typically settle
within 10µs after power-up. Figure 6 shows the output
voltage on power-up and power-down.
Figure 6. Power-Up/Power-Down Waveform
Good layout techniques optimize performance by mini-
mizing the amount of stray capacitance at the op
amp’s inputs and outputs. Place external components
close to the op amp to minimize trace lengths and
stray capacitance.
Power Supplies and Layout
The LMX321/LMX358/LMX324 operate from a single
+2.3V to +7V power supply. Bypass the power supply
with a 0.1µF capacitor to ground as close to V
possible.
as
CC
Selector Guide
Chip Information
LMX321 TRANSISTOR COUNT: 88
LMX358 TRANSISTOR COUNT: 175
LMX324 TRANSISTOR COUNT: 349
PROCESS: Bipolar
AMPLIFIERS PER
PART
TOP MARK
PACKAGE
LMX321AXK-T
LMX321AUK-T
LMX358AKA-T
LMX358ASA
1
1
2
2
2
4
4
ACP
ADSQ
AAIR
—
LMX358AUA-T
LMX324ASD
LMX324AUD
—
—
—
10 ______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, 5L SC70
1
21-0076
E
1
______________________________________________________________________________________ 11
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
12 ______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
______________________________________________________________________________________ 13
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
4X S
8
8
MILLIMETERS
INCHES
DIM MIN
MAX
MAX
MIN
-
-
0.043
0.006
0.037
0.014
0.007
0.120
1.10
0.15
0.95
0.36
0.18
3.05
A
0.002
0.030
0.010
0.005
0.116
0.05
0.75
0.25
0.13
2.95
A1
A2
b
E
H
Ø0.50±0.1
c
D
e
0.0256 BSC
0.65 BSC
0.6±0.1
E
H
0.116
0.188
0.016
0°
0.120
2.95
4.78
0.41
0°
3.05
5.03
0.66
6°
0.198
0.026
6°
L
1
1
α
S
0.6±0.1
0.0207 BSC
0.5250 BSC
BOTTOM VIEW
D
TOP VIEW
A1
A2
A
c
α
e
L
b
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0036
J
1
14 ______________________________________________________________________________________
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, TSSOP 4.40mm BODY
1
21-0066
I
1
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 ____________________ 15
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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