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Электронный компонент: MAX6120

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_______________General Description
The MAX6120 is the lowest-power 1.2V, precision,
three-terminal voltage reference offered in a SOT23
package. Ideal for 3V battery-powered equipment
where power conservation is critical, the MAX6120 is a
low-power alternative to existing two-terminal shunt ref-
erences. Unlike two-terminal references that throw
away battery current and require an external series
resistor, the MAX6120 has a 70A maximum supply
current (typically only 50A) that is independent of the
input voltage. This feature translates to maximum effi-
ciency at all battery voltages.
The MAX6120 operates from a supply voltage as low as
2.4V, and initial accuracy is 1% for the SOT23 pack-
age. Output voltage temperature coefficient is typically
only 30ppm/C, and is guaranteed to be less than
100ppm/C in the SOT23 package. For a guaranteed
output voltage temperature coefficient of less than
50ppm/C, see the MAX6520 data sheet.
________________________Applications
Battery-Powered Systems
Portable and Hand-Held Equipment
Data-Acquisition Systems
Instrumentation and Process Control
____________________________Features
o
3-Pin SOT23 Package
o
Supply Current Independent of Input Voltage
Over Temperature
o
50A Supply Current
o
2.4V to 11V Input Voltage Range
o
30ppm/C Typical Tempco (SOT23)
o
1% Initial Accuracy (SOT23)
MAX6120
Low-Cost, Micropower, Precision, 3-Terminal,
1.2V Voltage Reference
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
8
7
6
5
V
IN
N.C.
N.C.
N.C.
GND
N.C.
N.C.
V
OUT
MAX6120
SO
TOP VIEW
1
2
3 GND
V
IN
V
OUT
MAX6120
SOT23
_________________Pin Configurations
______________Ordering Information
V
IN
GND
V+
2.4V to 11V
0V
0.1
F
V
OUT
V
OUT
1.2V
MAX6120
__________Typical Operating Circuit
PART
MAX6120ESA
MAX6120EUR
-40C to +85C
-40C to +85C
TEMP. RANGE
PIN-PACKAGE
8 SO
3 SOT23-3
19-0458; Rev 1; 9/96
80
50
2
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX6120 TOC-01
INPUT VOLTAGE (V)
SUPPLY CURRENT (
A)
8
60
4
6
70
10
3
9
5
7
11
1.20010
1.19990
2
4
8
OUTPUT VOLTAGE
vs. INPUT VOLTAGE
1.19995
MAX6120-02
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
6
10
3
5
9
7
11
1.20005
1.20000
75
50
-50
SUPPLY CURRENT
vs. TEMPERATURE
MAX6120 TOC-02
TEMPERATURE (C)
SUPPLY CURRENT (
A)
100
60
55
65
0
50
70
-25
25
75
V
IN
= 9V
V
IN
= 5V
V
IN
= 3V
__________________________________________Typical Operating Characteristics
(V
IN
= 3V, I
LOAD
= 0mA, T
A
= +25C, unless otherwise noted.)
MAX6120
Low-Cost, Micropower, Precision, 3-Terminal,
1.2V Voltage Reference
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
IN
= 2.4V, I
LOAD
= 0mA, T
A
= +25C, unless otherwise noted.)
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.
Supply Voltage (V
IN
) ..............................................-0.3V to +12V
V
OUT
............................................................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration ..........Continuous to Either Supply
Continuous Power Dissipation (T
A
= +70C)
SOT23 (derate 4mW/C above +70C) ...........................320mW
Operating Temperature Range ...........................-40C to +85C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
e
n
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
10
400
1.188
1.200
1.212
V
2
30
Line Regulation
V
OUT
/V
IN
V/V
4.3
Short-Circuit Output Current
I
SC
400
mA
CONDITIONS
V
IN
= 2.4V to 11V, T
A
= T
MIN
to T
MAX
(Note 1)
0.1Hz to 10Hz
10Hz to 10kHz
V
OUT
shorted to GND
V
OUT
shorted to V
IN
I
Q
50
58
Quiescent Supply Current
70
A
T
A
= +25C
T
A
= T
MIN
to T
MAX
(Note 1)
1.5
5
Change in Supply Current
vs. Input Voltage
I
Q
/V
IN
A/V
V
IN
= 2.4V to 11V
T
A
= +25C
A
Note 1:
Production testing done at T
A
= +25C, over temperature limits guaranteed by parametric correlation data.
Note 2:
Contact factory for availability of a higher-grade, lower-TC option in a SOT23 package.
Output Voltage Noise
Vp-p
Load Regulation
V
OUT
/I
OUT
I
LOAD
= -50A to 400A (Note 1)
0.1
1
V/A
Output Voltage
V
OUT
1.176
1.224
V
T
A
= T
MIN
to T
MAX
(Note 2)
MAX6120EUR (SOT23)
Output Voltage Temperature
Coefficient
TCV
OUT
30
100
ppm/C
MAX6120EUR (SOT23), T
A
= T
MIN
to T
MAX
(Note 2)
MAX6120
Low-Cost, Micropower, Precision, 3-Terminal,
1.2V Voltage Reference
_______________________________________________________________________________________
3
0
-50
LOAD REGULATION
vs. TEMPERATURE
MAX6120 TOC-03
TEMPERATURE (C)
LOAD REGULATION (
V/
A)
100
0.16
0.08
0.24
0
50
0.32
-25
25
75
100
80
20
0.001
0.01
1
10
100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
40
60
MAX1620 TOC-06
FREQUENCY (kHz)
PSRR (dB)
0.1
1.2001
1.2000
1.1997
1
10
1000
OUTPUT VOLTAGE
vs. SOURCE CURRENT
1.1998
1.1999
MAX1620 TOC-05
SOURCE CURRENT (
A)
OUTPUT VOLTAGE (V)
100
____________________________Typical Operating Characteristics (continued)
(V
IN
= 3V, I
LOAD
= 0mA, T
A
= +25C, unless otherwise noted.)
0.1Hz TO 100Hz NOISE
50
V/div
1
s/div
A = OUTPUT CURRENT, 50
A/div, I
LOAD
= 0
A TO -50
A
B = OUTPUT VOLTAGE, 100mV/div
LOAD-TRANSIENT RESPONSE
B
A
10
s/div
A = OUTPUT CURRENT, 500
A/div, I
LOAD
= 0
A TO 500
A
B = OUTPUT VOLTAGE, 100mV/div
LOAD-TRANSIENT RESPONSE
B
A
10
s/div
A = INPUT VOLTAGE, 100mV/div, V
IN
= 3V 50mV
B = OUTPUT VOLTAGE, 10mV/div
LINE-TRANSIENT RESPONSE
B
A
OUT
IN
5
s/div
MAX6120
Low-Cost, Micropower, Precision, 3-Terminal,
1.2V Voltage Reference
4
_______________________________________________________________________________________
__________Applications Information
Input Bypassing
For the best line-transient performance, decouple the
input with a 0.1F ceramic capacitor as shown in the
Typical Operating Circuit. Locate the capacitor as
close to the device pin as possible. Where transient
performance is less important, no capacitor is neces-
sary.
Output Bypass
The MAX6120 performs well without an output decou-
pling capacitor. If your application requires an output
charge reservoir (e.g., to decouple the reference from
the input of a DAC), then make sure that the total output
capacitive load does not exceed 10nF.
DAC
LATCH A
DAC A
DAC
LATCH B
DAC B
DAC
LATCH C
LATCH
DAC C
SCLK
OUTA
OUTB
OUTC
LOUT
DIN
+3V
0.1F
V
IN
V
OUT
CS
REFAB
REFC
RESET
V
DD
V
SS
GND
16-BIT SHIFT REGISTER
CONTROL (8)
DATA (8)
MAX512
MAX513
MAX6120
1
2
1
2
3
4
5
6
7
8
9
10
11
12
14
3
0.01F
Figure 1. 3V, Triple, 8-Bit Serial DAC
Figure 2. Low-Power 1.2V Reference
+3V
-3V
V
IN
V
OUT
MAX6120
2
1
3
3
4
6
-1.2V
R
R
+1.2V
2
7
MAX406A
_____________________Pin Description
No Connect--not internally
connected
N.C.
--
Ground
GND
3
Reference Output
V
OUT
2
Input Voltage
V
IN
1
FUNCTION
NAME
2, 3, 5,
6, 7
4
PIN
1
8
SO
SOT23
___________________Chip Information
TRANSISTOR COUNT: 39
MAX6120
Low-Cost, Micropower, Precision, 3-Terminal,
1.2V Voltage Reference
_______________________________________________________________________________________
5
__________________________________________________Tape-and-Reel Information
4.00.1
4.00.1
2.00.05
1.750.1
1.50.1
1.10.1
8.00.2
3.50.05
AY
X X
LOT SPECIFIC
CODE
MARKING
INFORMATION
NOTE: DIMENSIONS ARE IN MM.
AND FOLLOW EIA481-1 STANDARD.
ICs MAY ALSO BE MARKED WITH FULL PART NAME: MAX6120
= MAX6120