REF34xx 器件是低温漂
(6ppm/°C)、低功耗、高精度 CMOS 电压基准,具有 ±0.05% 初始精度、低运行电流以及小于 95μA 的功耗。该器件还提供 3.8μVp-p/V 的超低输出噪声,这使得它在用于噪声关键型系统中的高分辨率数据转换器时能够保持较高的信号完整性。REF34xx 采用小型 SOT-23 封装,具有更高的规格参数并且能够以引脚对引脚方式替代 MAX607x、ADR34xx 和 LT1790(REF34xxT,无 EN 引脚)。REF34xx 系列与大多数 ADC 和 DAC 兼容,如 ADS1287、DAC8802 和 ADS1112。
该器件的低输出电压迟滞和低长期输出电压漂移可进一步提高稳定性和系统可靠性。此外,器件的小尺寸和低运行电流 (95μA) 特性使其非常适合便携式和电池供电应用。
REF34xx 具有 −40°C 至 +125°C 的较宽额定温度范围。
器件名称 | 封装 (1) | 封装尺寸(标称值) |
---|---|---|
REF34xx REF34xxT |
SOT-23 (6) | 2.90mm × 1.60mm |
Changes from Revision E (April 2021) to Revision F (June 2021)
Changes from Revision D (February 2021) to Revision E (April 2021)
Changes from Revision C (January 2021) to Revision D (February 2021)
Changes from Revision B (March 2018) to Revision C (February 2021)
Changes from Revision A (December 2017) to Revision B (March 2018)
Changes from Revision * (September 2017) to Revision A (December 2017)
PRODUCT | VOUT | |
---|---|---|
REF3425 | REF3425T | 2.5 V |
REF3430 | REF3430T | 3 V |
REF3433 | REF3433T | 3.3 V |
REF3440 | REF3440T | 4.096 V |
REF3450 | REF3450T | 5 V |
PIN | TYPE | DESCRIPTION | ||
---|---|---|---|---|
NAME | REF34xx (DBV) | REF34xxT (DBV) | ||
GND_F | 1 | Ground | Ground force connection. | |
GND_S | 2 | Ground | Ground sense connection. | |
GND | 2 | Ground | Device ground. | |
EN | 3 | Input | Enable connection. Enables or disables the device. | |
IN | 4 | 4 | Power | Input supply voltage connection. |
OUT_S | 5 |
Input |
Reference voltage output sense connection. | |
OUT_F | 6 | Output | Reference voltage output force connection. | |
VOUT | 6 | Output | Reference voltage output connection. | |
NC | 1,3,5 | - | Not connected. Pin can be left floating or connected to voltage within device operating range. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Input voltage | IN | –0.3 | 13 | V |
EN | –0.3 | IN + 0.3 | V | |
Output voltage | VOUT | –0.3 | 5.5 | V |
Output short circuit current | ISC | 20 | mA | |
Operating temperature range | TA | –55 | 150 | °C |
Storage temperature range | Tstg | –65 | 170 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2500 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±1500 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
IN | Input Voltage | VOUT + 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) | REF34T | REF34 | UNIT | |
---|---|---|---|---|
DBV | DBV | |||
6 PINS | 6 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 122.6 | 122.6 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 80.2 | 80.2 | °C/W |
RθJB | Junction-to-board thermal resistance | 42 | 42 | °C/W |
ΨJT | Junction-to-top characterization parameter | 23.2 | 23.2 | °C/W |
ΨJB | Junction-to-board characterization parameter | 41.9 | 41.9 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A | °C/W |
PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | TA = 25℃ | –0.05 | 0.05 | % | |||
Output voltage temperature coefficient (1) | –40°C ≤ TA ≤ 125°C | 2.5 | 6 | ppm/°C | |||
LINE & LOAD REGULATION | |||||||
ΔVO/ΔVIN | Line Regulation | VIN = VOUT + VDO (2) to 12 V | 2 | 15 | ppm/V | ||
ΔVO/ΔIL | Load Regulation | IL = 0 mA to 10mA, VIN = VOUT+ VDO (3) | Sourcing | 20 | 30 | ppm/mA | |
IL = 0 mA to –10mA, VIN = VOUT+ VDO, TA = 25°C (3) | Sinking, REF3425 | 40 | 70 | ||||
Sinking, REF3430 | 43 | 75 | |||||
Sinking, REF3433 | 48 | 84 | |||||
Sinking, REF3440 | 60 | 98 | |||||
Sinking, REF3450 | 70 | 140 | |||||
ISC | Short circuit current | VOUT = 0 V at TA = 25°C | 18 | 22 | mA | ||
NOISE | |||||||
enp-p | Low frequency noise (4) | 0.1Hz ≤ f ≤ 10Hz | 5 | µVp-p/V | |||
0.1Hz ≤ f ≤ 10Hz (REF3440 and REF3450) | 3.8 | ||||||
en | Integrated wide band noise | 10Hz ≤ f ≤ 10kHz | 24 | µVrms | |||
en | Output voltage noise density | f = 1kHz | 0.25 | ppm/√Hz
|
|||
f = 1kHz (REF3440 and REF3450) | 0.2 | ||||||
LONG TERM STABILITY AND HYSTERESIS | |||||||
Long-term stability (5) | DBV Package | 0 to 1000h at 35°C | 25 | ppm | |||
1000h to 2000h at 35°C | 10 | ||||||
Output voltage thermal hysteresis (6) | DBV Package | 25°C, –40°C,125°C, 25°C Cycle 1 | 30 | ppm | |||
25°C, –40°C,125°C, 25°C Cycle 2 | 10 | ||||||
TURN-ON TIME | |||||||
tON | Turn-on time | 0.1% of output voltage settling, CL = 10 µF | 2.5 | ms | |||
CAPACITIVE LOAD | |||||||
CL | Stable output capacitor range | –40°C ≤ TA ≤ 125°C | 0.1 | 10 | µF | ||
OUTPUT VOLTAGE | |||||||
VOUT | Output voltage | REF3425, REF3425T | 2.5 | V | |||
REF3430, REF3430T | 3.0 | ||||||
REF3433, REF3433T | 3.3 | ||||||
REF3440, REF3440T | 4.096 | ||||||
REF3450, REF3450T | 5.0 | ||||||
POWER SUPPLY | |||||||
VIN | Input voltage | VOUT + VDO | 12 | V | |||
IL | Output current capacity | VIN = VOUT + VDO to 12 V | –10 | 10 | mA | ||
IQ | Quiescent current | Active mode | 72 | 95 | µA | ||
Shutdown mode | 2.5 | 3 | |||||
VEN | ENABLE pin voltage | Voltage reference in active mode (EN = 1) | 1.6 | V | |||
Voltage reference in shutdown mode (EN = 0) | 0.5 | ||||||
VDO | Dropout voltage | IL = 0 mA | 50 | 100 | mV | ||
IL = 10 mA | 500 | ||||||
IEN | ENABLE pin leakage current | VEN = VIN = 12V | 1 | 2 | µA |
at TA = 25°C, VIN = VEN = 12 V, IL = 0 mA, CL = 10 µF, CIN = 0.1 µF (unless otherwise noted)