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| 型号： | REF5025ADGK |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 2/15页 |
| 文件大小： | 478K |
| 代理商： | REF5025ADGK |
www.ti.com
TEMPERATURE MONITORING
POWER DISSIPATION
NOISE PERFORMANCE
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM
REF50xx
V
TEMP
2.6mV/ C
°
OPA(1)
NOTE:(1)Lowdriftopamp,suchastheOPA333,OPA335,orOPA376.
+V
SBOS410 – JUNE 2007
The temperature output terminal (TEMP, pin 3)
The REF50xx family is specified to deliver current
provides a temperature-dependent voltage output
loads of ±10mA over the specified input voltage
with approximately 60k
source impedance. As seen
range. The temperature of the device increases
in Figure 8, the output voltage follows the nominal
according to the equation:
relationship:
TJ = TA + PD × θJA
VTEMP PIN = 509mV + 2.64 × T(°C)
Where:
TJ = Junction temperature (°C)
This pin indicates general chip temperature, accurate
to approximately ±15
°C. Although it is not generally
TA = Ambient temperature (°C)
suitable for accurate temperature measurements, it
PD = Power dissipated (W)
can be used to indicate temperature changes or for
θJA = Junction-to-ambient thermal resistance
temperature compensation of analog circuitry. A
(
°C/W)
temperature change of 30
°C corresponds to an
approximate 79mV change in voltage at the TEMP
The REF50xx junction temperature must not exceed
pin.
the absolute maximum rating of +150
°C.
The TEMP pin has high output impedance (see
Figure 21). Loading this pin with a low-impedance
circuit induces a measurement error; however, it does
Typical 0.1Hz to 10Hz voltage noise for each member
not have any effect on VOUT accuracy. To avoid
of the REF50xx family is specified in the Electrical
errors caused by low-impedance loading, buffer the
Characteristics: Per Device table. The noise voltage
TEMP pin output with a suitable low-temperature drift
increases
with
output
voltage
and
operating
temperature. Additional filtering can be used to
as shown in Figure 24.
improve output noise levels, although care should be
taken to ensure the output impedance does not
degrade performance.
Figure 24. Buffering the TEMP Pin Output
10
Copyright 2007, Texas Instruments Incorporated
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| REF5025AIDGKR | 功能描述:基准电压& 基准电流 Lo Noise Very Lo Drift Prec Vltg Ref RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF5025AIDGKT | 功能描述:基准电压& 基准电流 Lo Noise Very Lo Drift Prec Vltg Ref RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF5025AIDR | 功能描述:基准电压& 基准电流 Lo Noise Very Low Drift Prec VLTG REF RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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