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REF5040AID Datasheet(PDF) 10 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # REF5040AID
Description  Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

REF5040AID Datasheet(HTML) 10 Page - Burr-Brown (TI)

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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
REF5020,, REF5025
REF5030, REF5040
REF5045, REF5050
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
Ω 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
op amp, such as the OPA333, OPA335, or OPA376,
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
Submit Documentation Feedback
Product Folder Link(s): REF5020 REF5025 REF5030 REF5040 REF5045 REF5050


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