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參數(shù)資料
| 型號(hào)： | V62/07602-03XE |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 3 V, PDSO6 |
| 封裝： | GREEN, PLASTIC, SOT-23, 6 PIN |
| 文件頁數(shù)： | 3/19頁 |
| 文件大?。?/td> | 510K |
| 代理商： | V62/07602-03XE |
www.ti.com
Thermal Hysteresis
V
HYST
+
V
PRE
* VPOST
V
NOM
106(ppm)
(1)
Temperature Drift
Drift +
V
OUTMAX
* VOUTMIN
V
OUT
Temp Range
106(ppm)
(2)
Noise Performance
Long-Term Stability
Load Regulation
4 ppm/
°C, 100 A SOT23-6 SERIES VOLTAGE REFERENCES
SBVS078A – OCTOBER 2006 – REVISED APRIL 2007
Thermal hysteresis for the REF32xx is defined as the change in output voltage after operating the device at
25
°C, cycling the device through the specified temperature range, and returning to 25°C. It can be expressed as:
Where:
VHYST = Thermal hysteresis (in units of ppm)
VNOM = The specified output voltage
VPRE = Output voltage measured at 25°C pretemperature cycling
VPOST = Output voltage measured after the device has been cycled through the specified temperature
range of –40
°C to 125°C and returned to 25°C
The REF32xx is designed to exhibit minimal drift error, which is defined as the change in output voltage over
varying temperature. The drift is calculated using the box method, as described by the following equation:
The REF32xx features a typical drift coefficient of 4 ppm/
°C from 0°C to 125°C — the primary temperature range
for many applications. For the extended temperature range of –55
°C to 125°C, the REF32xx family drift
increases to a typical value of 10.5 ppm/
°C.
Typical 0.1-Hz to 10-Hz voltage noise can be seen in the Typical Characteristic curve, 0.1-Hz to 10-Hz Voltage
Noise. The noise voltage of the REF32xx increases with output voltage and operating temperature. Additional
filtering can be used to improve output noise levels, although care should be taken to ensure the output
impedance does not degrade ac performance.
Long-term stability refers to the change of the output voltage of a reference over a period of months or years.
This effect lessens as time progresses, as is shown by the long-term stability Typical Characteristic curves. The
typical drift value for the REF32xx is 55 ppm from 0 to 1000 hours. This parameter is characterized by measuring
30 units at regular intervals for a period of 1000 hours.
Load regulation is defined as the change in output voltage as a result of changes in load current. The load
regulation of the REF32xx is measured using force and sense contacts, as shown in Figure 4. The force and
sense lines can be used to effectively eliminate the impact of contact and trace resistance, resulting in accurate
voltage at the load. By connecting the force and sense lines at the load, the REF32xx compensates for the
contact and trace resistances because it measures and adjusts the voltage actually delivered at the load.
Copyright 2006–2007, Texas Instruments Incorporated
11
Product Folder Link(s): REF3212-EP, REF3220-EP, REF3225-EP REF3230-EP, REF3233-EP, REF3240-EP
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| V6207602-06XE | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4 ppm100 A SOT23-6 SERIES VOLTAGE REFERENCES |
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