Texas Instruments REF2912, REF2920, REF2925, REF2930, REF2933 Schematic [ru]
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REF2912 |
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REF2920 |
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www.ti.com |
REF2925 |
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REF2930 |
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REF2933 |
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REF2940 |
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SBVS033B – JUNE 2002 – REVISED FEBRUARY 2008 |
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100ppm/° C, 50 A in SOT23-3
CMOS VOLTAGE REFERENCE
FEATURES
●MicroSIZE PACKAGE: SOT23-3
●LOW DROPOUT: 1mV
●HIGH OUTPUT CURRENT: 25mA
●LOW TEMPERATURE DRIFT: 100ppm/° C max
●HIGH ACCURACY: 2%
●LOW IQ: 50 A max
APPLICATIONS
●PORTABLE, BATTERY-POWERED EQUIPMENT
●DATA ACQUISITION SYSTEMS
●MEDICAL EQUIPMENT
●HAND-HELD TEST EQUIPMENT
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REF2912 |
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IN |
1 |
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REF2920 |
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REF2925 |
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REF2930 |
3 |
GND |
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REF2933 |
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OUT |
2 |
REF2940 |
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SOT23-3 |
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DESCRIPTION
The REF29xx is a precision, low-power, low-voltage dropout voltage reference family available in a tiny SOT23-3.
The REF29xx small size and low power consumption (50 A max) make it ideal for portable and battery-powered applications. The REF29xx does not require a load capacitor, but is stable with any capacitive load.
Unloaded, the REF29xx can be operated with supplies within 1mV of output voltage. All models are specified for the wide temperature range, –40° C to +125° C.
PRODUCT |
VOLTAGE (V) |
REF2912 |
1.25 |
REF2920 |
2.048 |
REF2925 |
2.5 |
REF2930 |
3.0 |
REF2933 |
3.3 |
REF2940 |
4.096 |
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DROPOUT VOLTAGE vs LOAD CURRENT
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350 |
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(mV) |
300 |
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250 |
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Voltage |
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200 |
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Dropout |
150 |
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100 |
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50 |
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0 |
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0 |
5 |
10 |
15 |
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25 |
30 |
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Load Current (mA) |
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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. |
Copyright © 2002-2008, Texas Instruments Incorporated |
Products conform to specifications per the terms of Texas Instruments |
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standard warranty. Production processing does not necessarily include |
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testing of all parameters. |
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www.ti.com
ABSOLUTE MAXIMUM RATINGS(1)
...................................................................Supply Voltage, V+ to V– |
7.0V |
Output Short-Circuit(2) .............................................................. |
Continuous |
Operating Temperature .................................................. |
–40° C to +125° C |
Storage Temperature ..................................................... |
–65° C to +125° C |
Junction Temperature .................................................................... |
+150° C |
Lead Temperature (soldering, 10s) ............................................... |
+300° C |
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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.
(2) Short-circuit to ground.
PACKAGE/ORDERING INFORMATION(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.
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SPECIFIED |
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PACKAGE |
TEMPERATURE |
PACKAGE |
ORDERING |
TRANSPORT |
PRODUCT |
PACKAGE-LEAD |
DESIGNATOR(1) |
RANGE |
MARKING |
NUMBER |
MEDIA, QUANTITY |
REF2912 |
SO T23-3 |
DBZ |
–40° C to +125° C |
R29A |
REF2912AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2912AIDBZR |
Tape and Reel, 3000 |
REF2920 |
SOT23-3 |
DBZ |
–40° C to +125° C |
R29B |
REF2920AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2920AIDBZR |
Tape and Reel, 3000 |
REF2925 |
SOT23-3 |
DBZ |
–40° C to +125° C |
R29C |
REF2925AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2925AIDBZR |
Tape and Reel, 3000 |
REF2930 |
SOT23-3 |
DBZ |
–40° C to +125° C |
R29D |
REF2930AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2930AIDBZR |
Tape and Reel, 3000 |
REF2933 |
SOT23-3 |
DBZ |
–40° C to +125° C |
R29E |
REF2933AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2933AIDBZR |
Tape and Reel, 3000 |
REF2940 |
SOT23-3 |
DBZ |
–40° C to +125° C |
R29F |
REF2940AIDBZT |
Tape and Reel, 250 |
" |
" |
" |
" |
" |
REF2940AIDBZR |
Tape and Reel, 3000 |
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NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet, or see the TI web site at www.ti.com.
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, TA = – 40° C to +125° C.
At TA = +25° C, ILOAD = 0mA, VIN = 5V, unless otherwise noted.
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REF29xx |
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PARAMETER |
CONDITIONS |
MIN |
TYP |
MAX |
UNITS |
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REF2912-1.25V
OUTPUT VOLTAGE |
VOUT |
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1.225 |
1.25 |
1.275 |
V |
Initial Accuracy |
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2 |
% |
NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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14 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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42 |
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Vrms |
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LINE REGULATION |
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1.8V ≤ VIN ≤ 5.5V |
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60 |
190 |
V/V |
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REF2920 |
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OUTPUT VOLTAGE |
VOUT |
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2.007 |
2.048 |
2.089 |
V |
Initial Accuracy |
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2 |
% |
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NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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23 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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65 |
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Vrms |
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LINE REGULATION |
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VREF + 50mV ≤ VIN ≤ 5.5V |
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110 |
290 |
V/V |
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REF2925 |
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OUTPUT VOLTAGE |
VOUT |
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2.450 |
2.50 |
2.550 |
V |
Initial Accuracy |
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2 |
% |
NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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28 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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80 |
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Vrms |
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LINE REGULATION |
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VREF + 50mV ≤ VIN ≤ 5.5V |
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120 |
325 |
V/V |
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2 |
REF2912, 2920, 2925, 2930, 2933, 2940 |
www.ti.com |
SBVS033B |
ELECTRICAL CHARACTERISTICS (Cont.)
Boldface limits apply over the specified temperature range, TA = – 40° C to +125° C.
At TA = +25° C, ILOAD = 0mA, VIN = 5V, unless otherwise noted.
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REF29xx |
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PARAMETER |
CONDITIONS |
MIN |
TYP |
MAX |
UNITS |
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REF2930
OUTPUT VOLTAGE |
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VOUT |
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2.940 |
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3.0 |
3.06 |
V |
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Initial Accuracy |
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2 |
% |
NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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33 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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94 |
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Vrms |
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LINE REGULATION |
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VREF + 50mV ≤ |
VIN ≤ 5.5V |
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120 |
375 |
V/V |
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REF2933 |
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OUTPUT VOLTAGE |
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VOUT |
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3.234 |
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3.30 |
3.366 |
V |
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Initial Accuracy |
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2 |
% |
NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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36 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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105 |
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Vrms |
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LINE REGULATION |
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VREF + 50mV ≤ |
VIN ≤ 5.5V |
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130 |
400 |
V/V |
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REF2940 |
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OUTPUT VOLTAGE |
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VOUT |
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4.014 |
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4.096 |
4.178 |
V |
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Initial Accuracy |
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2 |
% |
NOISE |
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VPP |
Output Voltage Noise |
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f = 0.1Hz to 10Hz |
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45 |
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Voltage Noise |
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f = 10Hz to 10kHz |
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128 |
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Vrms |
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LINE REGULATION |
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VREF + 50mV ≤ |
VIN ≤ 5.5V |
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160 |
410 |
V/V |
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REF2912, REF2920, REF2925, REF2930, REF2933, REF2940 |
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OUTPUT VOLTAGE TEMP DRIFT(2) |
dV |
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/dT |
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OUT |
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– 40° C |
≤ |
TA ≤ |
+125° C |
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35 |
100 |
ppm/°C |
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OUTPUT CURRENT |
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ILOAD |
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25 |
mA |
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LONG-TERM STABILITY |
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0-1000H |
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24 |
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ppm |
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1000-2000H |
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ppm |
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LOAD REGULATION(3) |
dV |
OUT |
/dI |
LOAD |
0mA < I |
LOAD |
< 25mA, |
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3 |
100 |
V/mA |
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V |
= V |
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REF |
+ 500mV(1) |
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IN |
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THERMAL HYSTERESIS(4) |
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dT |
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25 |
100 |
ppm |
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DROPOUT VOLTAGE |
VIN – VOUT |
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1 |
50 |
mV |
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SHORT-CIRCUIT CURRENT |
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ISC |
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45 |
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mA |
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TURN-ON SETTLING TIME |
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to 0.1% at VIN = 5V with CL = 0 |
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120 |
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POWER SUPPLY |
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+ 0.001(5) |
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Voltage |
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V |
S |
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I = 0 |
V |
REF |
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5.5 |
V |
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L |
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Over Temperature |
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IQ |
– 40° C |
≤ |
TA ≤ |
+125° C |
VREF + 0.05 |
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5.5 |
V |
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Quiescent Current |
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42 |
50 |
A |
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Over Temperature |
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– 40° C |
≤ |
TA ≤ |
+125° C |
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59 |
A |
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TEMPERATURE RANGE |
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° C |
Specified Range |
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–40 |
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+125 |
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Operating Range |
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–40 |
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+125 |
° C |
Storage Range |
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–65 |
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+150 |
° C |
Thermal Resistance |
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θ |
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110 |
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° C/W |
SOT23-3 Surface-Mount |
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JC |
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θ |
JA |
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336 |
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° C/W |
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NOTES: (1) Minimum supply voltage for REF2912 is 1.8V. (2) Box Method used to determine over temperature drift. (3) Typical value of load regulation reflects measurements using a force and sense contacts, see text “Load Regulation”. (4) Thermal hysteresis procedure is explained in more detail in Applications Information section of data sheet. (5) For IL > 0, see Typical Characteristic curves.
REF2912, 2920, 2925, 2930, 2933, 2940 |
3 |
|
SBVS033B |
www.ti.com |
TYPICAL CHARACTERISTICS
At TA = +25° C, VIN = +5V power supply, REF2925 is used for typical characteristics, unless otherwise noted.
TEMPERATURE DRIFT (0° C to +70° C)
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50 |
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45 |
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40 |
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Units |
35 |
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30 |
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of |
25 |
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Number |
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20 |
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15 |
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10 |
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5 |
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0 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
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Drift (ppm/° C) |
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OUTPUT VOLTAGE vs TEMPERATURE
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2.502 |
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2.500 |
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(V) |
2.498 |
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Voltage |
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2.496 |
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Output |
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2.494 |
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2.492 |
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|
2.490 |
–40 |
–20 |
0 |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
|
|
|
Temperature (° C) |
|
|
|
|
||
LOAD REGULATION vs TEMPERATURE
|
6 |
|
V/mA) |
5 |
|
4 |
||
( |
||
|
||
Regulation |
3 |
|
|
||
Load |
2 |
|
1 |
||
|
||
|
0 |
–40 |
–20 |
0 |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
|
|
|
Temperature (° C) |
|
|
|
|
||
TEMPERATURE DRIFT (–40° C to +125° C)
|
100 |
|
|
90 |
|
|
80 |
|
Units |
70 |
|
60 |
||
of |
50 |
|
Number |
||
40 |
||
|
||
|
30 |
|
|
20 |
|
|
10 |
|
|
0 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
|
|
|
|
|
Drift (ppm/° C) |
|
|
|
|
|
||
MAXIMUM LOAD CURRENT vs TEMPERATURE
|
35 |
(mA) |
30 |
Current |
25 |
|
|
Load |
20 |
Maximum |
10 |
|
15 |
|
5 |
–40 |
–20 |
0 |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
|
|
|
Temperature (° C) |
|
|
|
|
||
QUIESCENT CURRENT vs TEMPERATURE
|
60 |
|
50 |
|
40 |
( A) |
30 |
Q |
|
I |
|
|
20 |
|
10 |
|
0 |
–40 |
–20 |
0 |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
|
|
|
Temperature (° C) |
|
|
|
|
||
4 |
REF2912, 2920, 2925, 2930, 2933, 2940 |
www.ti.com |
SBVS033B |
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25° C, VIN = +5V power supply, REF2925 is used for typical characteristics, unless otherwise noted.
Line Regulation ( V/V)
LINE REGULATION vs TEMPERATURE
200
150
100
50
0
–50
–40 |
–20 |
0 |
20 |
40 |
60 |
80 |
100 |
120 |
140 |
|
|
|
Temperature (° C) |
|
|
|
|
||
OUTPUT IMPEDANCE vs FREQUENCY
|
100 |
(dB) |
10 |
OutputImpedance |
0.1 |
|
1 |
|
0.01 |
1 |
10 |
100 |
1k |
10k |
100k |
|
|
Frequency (Hz) |
|
|
|
PSRR (dB)
POWER-SUPPLY REJECTION RATIO vs FREQUENCY
90
80
70
60
50
40
30
20
10
0
1 |
10 |
100 |
1k |
10k |
100k |
|
|
Frequency (Hz) |
|
|
|
Output Voltage (V)
OUTPUT VOLTAGE vs SUPPLY VOLTAGE (No Load)
2.50138
2.50000
2.49862
2.49724
2.49586
2.49448
2.49310
2.49172
2.49034
2.48896
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
6 |
|
|
|
Supply (V) |
|
|
|
|
Output Voltage (V)
OUTPUT VOLTAGE
vs SUPPLY VOLTAGE (ILOAD = 25mA)
2.5008
2.5000
2.4992
2.4984
2.4976
2.4968
2.4967
2.4952
2.4944
2.4936
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
6 |
|
|
|
Supply (V) |
|
|
|
|
Output Voltage (V)
OUTPUT VOLTAGE vs LOAD CURRENT
2.50152
2.50000
2.49848
2.49696
2.49544
2.49392
2.49824
2.49088
2.48936
0 |
5 |
10 |
15 |
20 |
25 |
30 |
|
|
Load Current (mA) |
|
|
||
REF2912, 2920, 2925, 2930, 2933, 2940 |
5 |
|
SBVS033B |
www.ti.com |
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