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REF70 是一系列高精度串联电压基准,具有业内超低的噪声 (0.23ppmp-p)、非常低的温度漂移系数 (2ppm/°C) 和高精度 (±0.025%)。REF70 提供高 PSRR、低压降以及出色的负载和线路调节功能,有助于满足严格的瞬态要求。这种精度和特性的组合专门为测试和测量等应用而设计,这些应用需要与精密基准精确配对,并需要高分辨率数据转换器,例如 ADS8900B、ADS127L01 和 DAC11001A,从而在信号链中实现出色的性能。REF70 还适用于对噪声敏感的医疗应用,例如超声波和 X 射线,以帮助实现模拟前端的低噪声测量。
REF70 系列提供 VSSOP 和 LCCC 封装选项。LCCC (FKH) 封装是一种密封的陶瓷封装,可为需要长期稳定基准而无需校准的应用提供低的长期漂移。
REF70 可在 −40°C 至 +125°C 的宽温度范围内运行。凭借宽的温度范围,器件可在各种工业应用中运行。
器件名称 | 封装 (1) | 封装尺寸(标称值) |
---|---|---|
REF70 | LCCC (8) | 5.00mm × 5.00mm |
VSSOP (8) | 3.00mm x 3.00mm |
Changes from Revision F (March 2023) to Revision G (September 2023)
Changes from Revision E (July 2022) to Revision F (March 2023)
Changes from Revision D (November 2021) to Revision E (July 2022)
Changes from Revision C (September 2021) to Revision D (November 2021)
Changes from Revision B (April 2021) to Revision C (September 2021)
Changes from Revision A (December 2020) to Revision B (April 2021)
Changes from Revision * (October 2020) to Revision A (December 2020)
PRODUCT | VOUT | |
---|---|---|
LCC package | VSSOP package | |
REF7012QFKHT (1) | REF7012QDGKR (1) | 1.25 V |
REF7025QFKHT (1) | REF7025QDGKR (1) | 2.5 V |
REF7030QFKHT (1) | REF7030QDGKR 2 | 3.0 V |
REF7033QFKHT (1) | REF7033QDGKR 2 | 3.3 V |
REF7040QFKHT (1) | REF7040QDGKR (1) | 4.096 V |
REF7050QFKHT (1) | REF7050QDGKR 2 | 5.0 V |
PIN | TYPE | DESCRIPTION | ||
---|---|---|---|---|
NAME | FKH | DGK | ||
EN | 1 | 1 | Input | Device enable control. Low level input disables the reference output and device enters shutdown mode. Device can be enabled by driving voltage > 1.6V. If the pin is left floating, the internal pull up will enable the device. |
VIN | 2 | 2 | Power | Input supply voltage connection. Connect a minimum 0.1-μF decoupling capacitor to ground for the best performance. |
GND | 3 | 3 | Ground | Ground connection. |
GND | 4 | 4 | Ground | Ground connection. |
GND | 5 | 5 | Ground | Ground connection |
OUTS | 6 | 6 | Input | Reference voltage output sense connection. |
OUTF | 7 | 7 | Output | Reference voltage output force connection. Connect a output capacitor between 1-μF to 100-μF for the best performance. |
GND | 8 | 8 | Ground | Ground connection. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Input voltage | VIN | -0.3 | 20 | V |
Enable voltage | EN | -0.3 | VIN + 0.3 | V |
Output voltage | VOUT | -0.3 | 6 | V |
Output short circuit current | ISC | 25 | 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, all pins(1) | ± 1000 | V |
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) | ± 500 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
VIN | Input voltage | VOUT + VDO(1) | 18 | V | |
EN | Enable voltage | 0 | VIN | V | |
IL | Output current | –10 | 10 | mA | |
TA | Operating temperature | –40 | 25 | 125 | °C |
THERMAL METRIC(1) | REF70xx | UNIT | ||
---|---|---|---|---|
FKH (CERAMIC) | DGK (MSOP) | |||
8 PINS | 8 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 95.8 | 201.2 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 59.0 | 85.7 | °C/W |
RθJB | Junction-to-board thermal resistance | 58.3 | 122.9 | °C/W |
ΨJT | Junction-to-top characterization parameter | 48.2 | 21.2 | °C/W |
ΨJB | Junction-to-board characterization parameter | 58.1 | 121.4 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | 28.5 | N/A | °C/W |
PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | TA = 25°C | –0.025 | 0.025 | % | |||
Output voltage accuracy | TA = 25°C; DGK package | –0.05 | 0.05 | % | |||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 125°C | 2 | ppm/℃ | ||||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 85°C; DGK package | 2 | ppm/℃ | ||||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 125°C; DGK package | 4.2 | ppm/℃ | ||||
LINE AND LOAD REGULATION | |||||||
ΔVO / ΔVIN | Line regulation | 2.75 V ≤ VIN ≤ 18 V | 4 | ppm/V | |||
2.75 V ≤ VIN ≤ 18 V, –40°C ≤ TA ≤ 125°C | 30 | ||||||
ΔVO / ΔIL | Load regulation | IL = 0 mA to 10mA | 5 | ppm/mA | |||
IL = 0 mA to 10mA, –40°C ≤ TA ≤ 125°C | 15 | ||||||
IL = 0 mA to –10mA | 15 | ||||||
IL = 0 mA to –10mA, –40°C ≤ TA ≤ 125°C | 30 | ||||||
NOISE | |||||||
enp-p | Low frequency noise | ƒ = 0.1 Hz to 10 Hz | 0.25 | ppmp-p | |||
en | Output voltage noise | ƒ = 10 Hz to 1 kHz | 0.35 | ppmrms | |||
HYSTERESIS AND LONG-TERM STABILITY | |||||||
Long-term stability |
0 to 250h at 35°C –FKH package | 15 | ppm | ||||
0 to 1000h at 35°C – FKH package | 35 | ||||||
Long-term stability | 0 to 250h at 35°C – DGK package | 27 | ppm | ||||
0 to 1000h at 35°C – DGK package | 37 | ||||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – FKH package | 18 | ppm | ||||
25°C, –40°C, 85°C, 25°C – FKH package | 11 | ||||||
25°C, 0°C, 70°C, 25°C – FKH package | 11 | ||||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – DGK package | 410 | ppm | ||||
25°C, –40°C, 85°C, 25°C – DGK package | 35 | ||||||
25°C, 0°C, 70°C, 25°C – DGK package | 33 | ||||||
TURN ON TIME | |||||||
tON | Turn-on time | 0.1% settling, COUT = 1µF | 0.5 | ms | |||
CAPACITIVE LOAD | |||||||
CIN | Stable input capacitor range | –40℃ ≤ TA ≤ 125℃ | 0.1 | µF | |||
COUT | Stable output capacitor range (1) | –40℃ ≤ TA ≤ 125℃ | 1 | 100 | µF | ||
POWER SUPPLY | |||||||
VIN | Input voltage | 2.75 | 18 | V | |||
IQ | Quiescent current | TA = 25°C | Active mode | 4 | 6.5 | mA | |
–40°C ≤ TA ≤ 125°C | 7.5 | mA | |||||
TA = 25°C | Shutdown mode | 5 | 10 | uA | |||
–40°C ≤ TA ≤ 125°C | 12 | uA | |||||
VEN | Enable pin voltage | Active mode (EN=1) | 1.6 | V | |||
Shutdown mode (EN=0) | 0.5 | V | |||||
IEN | Enable pin current | VIN = VEN = 18V | 3.2 | 4 | uA | ||
VIN = VEN = 18V, –40°C ≤ TA ≤ 125°C | 5 | uA | |||||
ISC | Short circuit current | VOUT = 0V | 30 | mA |
PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | TA = 25°C | –0.025 | 0.025 | % | |||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 125°C | 2 | ppm/℃ | ||||
LINE AND LOAD REGULATION | |||||||
ΔVO / ΔVIN | Line regulation | VOUT + VDO ≤ VIN ≤ 18 V | 4 | ppm/V | |||
VOUT + VDO ≤ VIN ≤ 18 V, –40°C ≤ TA ≤ 125°C | 30 | ||||||
ΔVO / ΔIL | Load regulation | IL = 0 mA to 10mA, VIN = VOUT + VDO | 5 | ppm/mA | |||
IL = 0 mA to 10mA, VIN = VOUT + VDO, –40°C ≤ TA ≤ 125°C | 10 | ||||||
IL = 0 mA to –10mA, VIN = VOUT + VDO | 5 | ||||||
IL = 0 mA to –10mA, VIN = VOUT + VDO, –40°C ≤ TA ≤ 125°C | 15 | ||||||
NOISE | |||||||
enp-p | Low frequency noise | ƒ = 0.1 Hz to 10 Hz | 0.23 | ppmp-p | |||
en | Output voltage noise | ƒ = 10 Hz to 1 kHz | 0.35 | ppmrms | |||
HYSTERESIS AND LONG-TERM STABILITY | |||||||
Long-term stability | 0 to 250h at 35°C - FKH package | 15 | ppm | ||||
0 to 1000h at 35°C - FKH package | 35 | ||||||
Long-term stability | 0 to 250h at 35°C – DGK package | 35 | ppm | ||||
0 to 1000h at 35°C – DGK package | 75 | ppm | |||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – FKH package | 180 | ppm | ||||
25°C, –40°C, 85°C, 25°C – FKH package | 100 | ||||||
25°C, 0°C, 70°C, 25°C – FKH package | 40 | ||||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – DGK package | 290 | ppm | ||||
25°C, –40°C, 85°C, 25°C – DGK package | 50 | ||||||
25°C, 0°C, 70°C, 25°C – DGK package | 45 | ||||||
TURN ON TIME | |||||||
tON | Turn-on time | 0.1% settling, COUT = 1µF | 0.5 | ms | |||
CAPACITIVE LOAD | |||||||
CIN | Stable input capacitor range | –40℃ ≤ TA ≤ 125℃ | 0.1 | µF | |||
COUT | Stable output capacitor range (1) | –40℃ ≤ TA ≤ 125℃ | 1 | 100 | µF | ||
POWER SUPPLY | |||||||
VIN | Input voltage | VOUT + VDO | 18 | V | |||
IQ | Quiescent current | TA = 25°C | Active mode | 4 | 6 | mA | |
–40°C ≤ TA ≤ 125°C | 6.5 | mA | |||||
TA = 25°C | Shutdown mode | 5 | 10 | uA | |||
–40°C ≤ TA ≤ 125°C | 12 | uA | |||||
VEN | Enable pin voltage | Active mode (EN=1) | 1.6 | V | |||
Shutdown mode (EN=0) | 0.5 | V | |||||
IEN | Enable pin current | VIN = VEN = 18V | 3.2 | 4 | uA | ||
VIN = VEN = 18V, –40°C ≤ TA ≤ 125°C | 5 | uA | |||||
VDO | Dropout voltage | IL = 5mA, –40°C ≤ TA ≤ 125°C | 250 | mV | |||
IL = 10mA, –40°C ≤ TA ≤ 125°C | 400 | mV | |||||
ISC | Short circuit current | VOUT = 0V | 25 | mA |
PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | TA = 25°C | –0.025 | 0.025 | % | |||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 125°C | 2 | ppm/℃ | ||||
LINE AND LOAD REGULATION | |||||||
ΔVO / ΔVIN | Line regulation | 3.2 V ≤ VIN ≤ 18 V | 4 | ppm/V | |||
3.2 V ≤ VIN ≤ 18 V, –40°C ≤ TA ≤ 125°C | 30 | ||||||
ΔVO / ΔIL | Load regulation | IL = 0 mA to 10mA, VIN = 3.5 V | 5 | ppm/mA | |||
IL = 0 mA to 10mA, VIN = 3.5 V, –40°C ≤ TA ≤ 125°C | 10 | ||||||
IL = 0 mA to –10mA, VIN = 3.5 V | 5 | ||||||
IL = 0 mA to –10mA, VIN = 3.5 V, –40°C ≤ TA ≤ 125°C | 15 | ||||||
NOISE | |||||||
enp-p | Low frequency noise | ƒ = 0.1 Hz to 10 Hz | 0.23 | ppmp-p | |||
en | Output voltage noise | ƒ = 10 Hz to 1 kHz | 0.35 | ppmrms | |||
HYSTERESIS AND LONG-TERM STABILITY | |||||||
Long-term stability | 0 to 250h at 35°C - FKH package | 15 | ppm | ||||
0 to 1000h at 35°C - FKH package | 35 | ||||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – FKH package | 180 | ppm | ||||
25°C, –40°C, 85°C, 25°C – FKH package | 100 | ||||||
25°C, 0°C, 70°C, 25°C – FKH package | 40 | ||||||
TURN ON TIME | |||||||
tON | Turn-on time | 0.1% settling, COUT = 1µF | 0.5 | ms | |||
CAPACITIVE LOAD | |||||||
CIN | Stable input capacitor range | –40℃ ≤ TA ≤ 125℃ | 0.1 | µF | |||
COUT | Stable output capacitor range (1) | –40℃ ≤ TA ≤ 125℃ | 1 | 100 | µF | ||
POWER SUPPLY | |||||||
VIN | Input voltage | VOUT + VDO | 18 | V | |||
IQ | Quiescent current | TA = 25°C | Active mode | 4 | 6 | mA | |
–40°C ≤ TA ≤ 125°C | 7 | mA | |||||
TA = 25°C | Shutdown mode | 5 | 10 | uA | |||
–40°C ≤ TA ≤ 125°C | 12 | uA | |||||
VEN | Enable pin voltage | Active mode (EN=1) | 1.6 | V | |||
Shutdown mode (EN=0) | 0.5 | V | |||||
IEN | Enable pin current | VIN = VEN = 18V | 3.2 | 4 | uA | ||
VIN = VEN = 18V, –40°C ≤ TA ≤ 125°C | 5 | uA | |||||
VDO | Dropout voltage | IL = 5mA, –40°C ≤ TA ≤ 125°C | 250 | mV | |||
IL = 10mA, –40°C ≤ TA ≤ 125°C | 400 | mV | |||||
ISC | Short circuit current | VOUT = 0V | 25 | mA |
PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
ACCURACY AND DRIFT | |||||||
Output voltage accuracy | TA = 25°C | –0.025 | 0.025 | % | |||
Output voltage temperature coefficient | –40°C ≤ TA ≤ 125°C | 2 | ppm/℃ | ||||
LINE AND LOAD REGULATION | |||||||
ΔVO / ΔVIN | Line regulation | 3.5 V ≤ VIN ≤ 18 V | 4 | ppm/V | |||
3.5 V ≤ VIN ≤ 18 V, –40°C ≤ TA ≤ 125°C | 30 | ||||||
ΔVO / ΔIL | Load regulation | IL = 0 mA to 10mA, VIN = 3.8 V | 5 | ppm/mA | |||
IL = 0 mA to 10mA, VIN = 3.8 V, –40°C ≤ TA ≤ 125°C | 10 | ||||||
IL = 0 mA to –10mA, VIN = 3.8 V | 5 | ||||||
IL = 0 mA to –10mA, VIN = 3.8 V, –40°C ≤ TA ≤ 125°C | 15 | ||||||
NOISE | |||||||
enp-p | Low frequency noise | ƒ = 0.1 Hz to 10 Hz | 0.23 | ppmp-p | |||
en | Output voltage noise | ƒ = 10 Hz to 1 kHz | 0.35 | ppmrms | |||
HYSTERESIS AND LONG-TERM STABILITY | |||||||
Long-term stability | 0 to 250h at 35°C - FKH package | 15 | ppm | ||||
0 to 1000h at 35°C - FKH package | 35 | ||||||
Output voltage hysteresis (cycle 1) | 25°C, –40°C, 125°C, 25°C – FKH package | 180 | ppm | ||||
25°C, –40°C, 85°C, 25°C – FKH package | 100 | ||||||
25°C, 0°C, 70°C, 25°C – FKH package | 40 | ||||||
TURN ON TIME | |||||||
tON | Turn-on time | 0.1% settling, COUT = 1µF | 0.5 | ms | |||
CAPACITIVE LOAD | |||||||
CIN | Stable input capacitor range | –40℃ ≤ TA ≤ 125℃ | 0.1 | µF | |||
COUT | Stable output capacitor range (1) | –40℃ ≤ TA ≤ 125℃ | 1 | 100 | µF | ||
POWER SUPPLY | |||||||
VIN | Input voltage | VOUT + VDO | 18 | V | |||
IQ | Quiescent current | TA = 25°C | Active mode | 4 | 6 | mA | |
–40°C ≤ TA ≤ 125°C | 7 | mA | |||||
TA = 25°C | Shutdown mode | 5 | 10 | uA | |||
–40°C ≤ TA ≤ 125°C | 12 | uA | |||||
VEN | Enable pin voltage | Active mode (EN=1) | 1.6 | V | |||
Shutdown mode (EN=0) | 0.5 | V | |||||
IEN | Enable pin current | VIN = VEN = 18V | 3.2 | 4 | uA | ||
VIN = VEN = 18V, –40°C ≤ TA ≤ 125°C | 5 | uA | |||||
VDO | Dropout voltage | IL = 5mA, –40°C ≤ TA ≤ 125°C | 250 | mV | |||
IL = 10mA, –40°C ≤ TA ≤ 125°C | 400 | mV | |||||
ISC | Short circuit current | VOUT = 0V | 25 | mA |