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REF3112
Schematic [ru]
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Texas Instruments REF3112, REF3120, REF3125, REF3130, REF3133 Schematic [ru]

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SBVS046C – DECEMBER 2003 – REVISED FEBRUARY 2006
15ppm/°C Max, 100µA, SOT23-3 SERIES VOLTAGE REFERENCE
REF3112 REF3120 REF3125 REF3130 REF3133 REF3140
FEATURES
●
Micro
SIZE PACKAGE: SOT23-3
● LOW DROPOUT: 5mV
● HIGH OUTPUT CURRENT: ±10mA
● HIGH ACCURACY: 0.2% max
● LOW IQ: 115µA max
●
EXCELLENT SPECIFIED DRIFT PERFORMANCE:
15ppm/°C (max) from 0°C to +70°C 20ppm/°C (max) from –40°C to +125°C
APPLICATIONS
● PORTABLE, BATTERY-POWERED EQUIPMENT
● DATA ACQUISITION SYSTEMS
● MEDICAL EQUIPMENT
● HAND-HELD TEST EQUIPMENT
REF3112
1IN
REF3120
2OUT
REF3125 REF3130 REF3133 REF3140
3 GND
DESCRIPTION
The REF31xx is a family of precision, low power, low dropout, series voltage references available in the tiny SOT23-3 pack­age.
Unloaded, the REF31xx can be operated on supplies down to 5mV above the output voltage. All models are specified for the wide temperature range of –40°C to +125°C.
PRODUCT VOLTAGE (V)
REF3112 1.25 REF3120 2.048 REF3125 2.5 REF3130 3.0 REF3133 3.3 REF3140 4.096
SOT23-3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 2003-2006, Texas Instruments Incorporated
www.ti.com
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to V–................................................................... 7.0V
Output Short-Circuit ................................................................. Continuous
Operating Temperature .................................................. –55°C to +135°C
Storage Temperature ..................................................... –65°C to +150°C
Junction Temperature .................................................................... +150°C
NOTES: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these, or any other conditions beyond those specified, is not implied.
(1)
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru­ments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER MEDIA, QUANTITY
REF3112 SOT23-3 DBZ –40°C to +125°C R31A REF3112AIDBZT Tape and Reel, 250
(1)
SPECIFIED
PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT
" """"REF3112AIDBZR Tape and Reel, 3000
REF3120 SOT23-3 DBZ –40°C to +125°C R31B REF3120AIDBZT Tape and Reel, 250
" """"REF3120AIDBZR Tape and Reel, 3000
REF3125 SOT23-3 DBZ –40°C to +125°C R31C REF3125AIDBZT Tape and Reel, 250
" """"REF3125AIDBZR Tape and Reel, 3000
REF3130 SOT23-3 DBZ –40°C to +125°C R31E REF3130AIDBZT Tape and Reel, 250
" """"REF3130AIDBZR Tape and Reel, 3000
REF3133 SOT23-3 DBZ –40°C to +125°C R31F REF3133AIDBZT Tape and Reel, 250
" """"REF3133AIDBZR Tape and Reel, 3000
REF3140 SOT23-3 DBZ –40°C to +125°C R31D REF3140AIDBZT Tape and Reel, 250
" """"REF3140AIDBZR Tape and Reel, 3000
NOTE: (1) (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com.
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, I
PARAMETER CONDITIONS MIN TYP MAX UNITS
OUTPUT VOLTAGE V
Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 17 µV Voltage Noise f = 10Hz to 10kHz 24 µVrms
OUTPUT VOLTAGE V Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 27 µV Voltage Noise f = 10Hz to 10kHz 39 µVrms
OUTPUT VOLTAGE V Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 33 µV Voltage Noise f = 10Hz to 10kHz 48 µVrms
= 0mA, VIN = 5V, unless otherwise noted.
LOAD
OUT
OUT
OUT
REF3112
(1)
REF3120 – 2.048
REF3125 – 2.5V
REF31xx
- 1.25V
1.2475 1.25 1.2525 V
2.0439 2.048 2.0521 V
2.4950 2.50 2.5050 V
PP
PP
PP
2
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REF3112, 3120, 3125, 3130, 3133, 3140
SBVS046C
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, I
PARAMETER CONDITIONS MIN TYP MAX UNITS
OUTPUT VOLTAGE V
Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 39 µV Voltage Noise f = 10Hz to 10kHz 57 µVrms
OUTPUT VOLTAGE V Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 43 µV Voltage Noise f = 10Hz to 10kHz 63 µVrms
OUTPUT VOLTAGE V Initial Accuracy –0.2 0.2 %
NOISE
Output Voltage Noise f = 0.1Hz to 10Hz 53 µV Voltage Noise f = 10Hz to 10kHz 78 µVrms
OUTPUT VOLTAGE TEMP DRIFT
LONG-TERM STABILITY
LINE REGULATION V LOAD REGULATION
Sourcing 0mA < I
Sinking –10mA < I
THERMAL HYSTERESIS
First Cycle 100 ppm Additional Cycles 25 ppm
DROPOUT VOLTAGE OUTPUT CURRENT I
SHORT-CIRCUIT CURRENT I
Sourcing 50 mA Sinking 40 mA
TURN-ON SETTLING TIME to 0.1% at V POWER SUPPLY I
Voltage V
Quiescent Current I
Over Temperature 115 135 TEMPERATURE RANGE
Specified Range –40 +125 °C Operating Range –55 +135 °C Storage Range –65 +150 °C Thermal Resistance SOT23-3 Surface-Mount
NOTES: (1) Minimum supply voltage for REF3112 is 1.8V.
(2) Box Method used to determine temperature drift. (3) Typical value of load regulation reflects measurements using force and sense contacts; see the (4) Thermal hysteresis is explained in more detail in the (5) For I
= 0mA, VIN = +5V, unless otherwise noted.
LOAD
OUT
OUT
OUT
REF3112, REF3120, REF3125, REF3130, REF3133, REF3140
(2)
dV
/dT
OUT
(3)
(1)
> 0, see the Typical Characteristic curves.
L
dV
/dI
OUT
LOAD
(4)
V
– V
IN
OUT
LOAD
SC
S Q
θ
JA
REF31xx
REF3130 – 3.0V
2.9940 3.0 3.0060 V
REF3133 – 3.3V
3.2934 3.30 3.3066 V
REF3140 – 4.096V
4.0878 4.096 4.1042 V
0
°C ≤ T
≤ +70°C 5 15 ppm/°C
A
°C ≤ T
≤ +125°C 10 20 ppm/°C
A
0-1000h 70 ppm
(1)
+ 0.05
≤ VIN ≤ 5.5V 20 65 ppm/V
< 10mA, 10 30 µV/mA
= V
= V
LOAD
+ 250mV
REF
LOAD
+ 100mV
REF
(1)
< 0mA, 20 50 µV/mA
(1)
dT
550 mV
–10 10 mA
= +5V with CL = 0 400 µs
IN
= 0
L
V
REF
+ 0.05
(1)
5.5 V
100 115 µA
336 °C/W
Applications Information
section of this data sheet.
Load Regulation
section.
REF
–40
V
V
IN
IN
PP
PP
PP
µA
REF3112, 3120, 3125, 3130, 3133, 3140
SBVS046C
www.ti.com
3
TYPICAL CHARACTERISTICS
At TA = +25°C, VIN = +5V power supply, REF3125 is used for typical characteristics, unless otherwise noted.
TEMPERATURE DRIFT (0°C to +70°C)
18 16 14 12 10
8 6
Percentage of Units
4 2 0
10
2 3 4 5 6 8 9 10111213141516
Drift (ppm/°C)
OUTPUT VOLTAGE vs TEMPERATURE
0.16
0.14
0.12
0.10
0.08
0.06
0.04
Output Drift (%)
0.02 0
−0.02
−0.04
−60 −40 −20 0 4020 60 80 100 120 140
Temperature (°C)
TEMPERATURE DRIFT (–40°C to +125°C)
25
20
15
10
Percentage of Units
5
0
10
2 3 4 5 6 7 8 9 101112131415161718192021
Drift (ppm/°C)
DROPOUT VOLTAGE vs LOAD CURRENT
120
100
80
60
40
Dropout Voltage (mV)
20
0
–15 –10 –5051015
Load Current (mA)
QUIESCENT CURRENT vs TEMPERATURE
120
100
80
60
40
Quiescent Current (µA)
20
0
–60 –40 –20 0 20 40 60 100 12080 140
Temperature (°C)
4
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100
10
1
0.1
Output Resistance (Ω)
0.01 1 10 100 1k 100k10k 1M
OUTPUT IMPEDANCE vs FREQUENCY
Frequency (Hz)
REF3112, 3120, 3125, 3130, 3133, 3140
SBVS046C
TYPICAL CHARACTERISTICS (Cont.)
STEP RESPONSE, CL = 0, 5V STARTUP
100µs/div
V
IN
V
OUT
5V/div1V/div
REF3112 LONG TERM STABILITY
20
0
–20
–40
–60
–80
–100
–120
Drift (ppm)
0 100 200 300 400 500 600 700 800 900 1000
Time (Hrs)
At TA = +25°C, VIN = +5V power supply, REF3125 is used for typical characteristics, unless otherwise noted.
PSRR vs FREQUENCY
90 80 70 60 50 40 30 20 10
Power-Supply Rejection Ratio (dB)
0
1 10 100 1k 10k 100k
Frequency (Hz)
2.505
2.504
2.503
2.502
2.501
2.500
Output Voltage (V)
2.499
2.498
2.497 –15 –10 –50 51015
OUTPUT VOLTAGE vs LOAD CURRENT
+125°C
+25°C
−40°C
Load Current (mA)
OUTPUT vs SUPPLY
2.505
2.504
2.503
2.502
2.501
Output (V)
2.500
2.499
2.498
+125°C
+25°C
−40°C
2.0 2.5 3.0 3.5 4.0 4.5 5.5 6.05.0 6.5 Supply (V)
0.1Hz TO 10Hz NOISE
10µV/div
REF3112, 3120, 3125, 3130, 3133, 3140
SBVS046C
400ms/div
5
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