The REF2125 device is a low temperature drift
(6 ppm/°C), low-power, high-precision CMOS voltage reference, featuring ±0.05% initial accuracy, low operating current with power consumption less than 95 μA. This device also offers very low output noise of 5 μVp-p /V, which enables its ability to maintain high signal integrity with high-resolution data converters and noise critical systems.
Stability and system reliability are further improved by the low output-voltage hysteresis of the device and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 μA) make them ideal for portable and battery-powered applications.
REF2125 is specified for the wide temperature range of −40°C to +125°C. Contact the TI sales representative for additional voltage options.
PART NAME | PACKAGE | BODY SIZE (NOM) |
---|---|---|
REF2125 | SOT-23 (5) | 2.90 mm × 1.60 mm |
DATE | REVISION | NOTES |
---|---|---|
September 2017 | * | Initial release |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | EN | Input | Enable connection. Enables or disables the device. |
2 | VIN | Power | Input supply voltage connection. |
3 | CS | Input | Clean start pin. Connect to a resistor or capacitor to enable the clean start feature. |
4 | VOUT | Output | Reference voltage output. |
5 | GND | Ground | Ground connection. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Input voltage | IN | VREF + 0.05 | 13 | V |
EN | –0.3 | IN + 0.3 | ||
Output voltage | VREF | –0.3 | 5.5 | V |
Output short circuit current | 20 | mA | ||
Temperature | Operating, TA | –55 | 150 | °C |
Storage Tstg | –65 | 170 |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±1000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±250 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
IN | Supply input voltage (IL = 0 mA, TA = 25°C) | VREF + VDO (1) | 12 | V | |
EN | Enable voltage | 0 | IN | V | |
IL | Output current | –10 | 10 | mA | |
TA | Operating temperature | –40 | 25 | 125 | °C |
THERMAL METRIC(1) | REF2125 | UNIT | |
---|---|---|---|
DBV (SOT-23) | |||
6 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 185 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 156 | °C/W |
RθJB | Junction-to-board thermal resistance | 29.6 | °C/W |
ψJT | Junction-to-top characterization parameter | 33.8 | °C/W |
ψJB | Junction-to-board characterization parameter | 29.1 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | –40°C ≤ TA ≤ 125°C | –0.05% | 0.05% | ||||
Output voltage temperature coefficient(1) | 2.5 | 6 | ppm/°C | ||||
LINE AND LOAD REGULATION | |||||||
ΔV(OΔVIN) | Line regulation | VIN = 2.55 V to 12 V , TA = 25°C | 2 | ppm/V | |||
VIN = VREF + VDO(5) to 12 V, −40°C ≤ TA ≤ 125°C | 15 | ||||||
ΔV(OΔIL) | Load regulation | IL = 0 mA to 10 mA, VIN = 3 V, TA = 25°C | Sourcing | 20 | ppm/mA | ||
IL = 0 mA to 10 mA, VIN = 3 V, −40°C ≤ TA ≤ 125°C | Sourcing | 30 | |||||
IL = 0 mA to –10 mA, VIN = VREF+ VDO(5), TA = 25°C | Sinking | 40 | |||||
IL = 0 mA to –10 mA, VIN = VREF+ VDO(5), −40°C ≤ TA ≤ 125°C | Sinking | 70 | |||||
ISC | Short-circuit current(6) | VREF = 0, CCS = No connect, TA = 25°C | 18 | mA | |||
RCS = 500kΩ, TA = 25°C | 7 | mA | |||||
CCS = GND, TA = 25°C | 0.5 | mA | |||||
NOISE | |||||||
en p-p | Output voltage noise(2) | ƒ = 0.1 Hz to 10 Hz | 5 | μV p-p/V | |||
ƒ = 10 Hz to 10 kHz | 24 | μV rms | |||||
en | Output voltage noise density | ƒ = 1 kHz | 0.25 | ppm/√Hz | |||
HYSTERESIS AND LONG TERM STABILITY | |||||||
Long-term stability(3) | 1000 hours | 30 | ppm | ||||
Output voltage hysteresis(4) | TA = 25°C to −40°C to 125°C to 25°C, Cycle 1 | 30 | ppm | ||||
TA = 25°C to −40°C to 125°C to 25°C, Cycle 2 | 10 | ||||||
TURNON | |||||||
tON | Turnon time | 0.1% of output voltage settling, CL = 10 µF, REF2125 | 2.5 | ms | |||
CAPACITIVE LOAD | |||||||
CL | Stable output capacitor value | −40°C ≤ TA ≤ 125°C | 0.1 | 10 | µF | ||
OUTPUT VOLTAGE | |||||||
VREF | Output voltage | REF2125 | 2.5 | V | |||
POWER SUPPLY | |||||||
VIN | Input voltage | VREF + VDO | 12 | V | |||
IL | Output current capacity | VIN = VREF + VDO(5) to 12 V | Sourcing | 10 | mA | ||
VIN = VREF + VDO(5) to 12 V | Sinking | –10 | |||||
IQ | Quiescent current | −40°C ≤ TA ≤ 125°C | Active mode | 72 | 95 | µA | |
−40°C ≤ TA ≤ 125°C | Shutdown mode | 2.5 | 3 | ||||
VDO | Dropout voltage | IL = 0 mA, TA= 25°C | 50 | mV | |||
IL = 0 mA, −40°C ≤ TA ≤ +125°C | 100 | ||||||
IL = 10 mA, −40°C ≤ TA ≤ +125°C | 500 | ||||||
VEN | ENABLE pin voltage | Voltage reference in active mode (EN = 1) | 1.6 | V | |||
Voltage reference in shutdown mode (EN = 0) | 0.5 | ||||||
IEN | ENABLE pin leakage current | ENABLE = VIN, −40°C ≤ TA ≤ 125°C | 1 | 2 | µA |