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REF5010 데이터시트(PDF) 24 Page - Texas Instruments

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부품명 REF5010
상세설명  REF50xx Low-Noise, Very Low Drift, Wide VIN Precision Voltage Reference
PDF  46 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

REF5010 데이터시트(HTML) 24 Page - Texas Instruments

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8.4 Device Functional Modes
8.4.1 Basic Connections
Figure 8-6 shows the typical connections for the REF50xx. TI recommends a supply bypass capacitor ranging
from 1μF to 10μF. A 1μF to 50μF output capacitor (CL) must be connected from VOUT to GND. The equivalent
series resistance (ESR) value of CL must be less than or equal to 1.5Ω to make sure output stability. To minimize
noise, the recommended ESR of CL is from 1Ω and 1.5Ω.
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM/NR
REF50xx
C
BYPASS
1 Fto10 F
m
m
C
L
1 Fto50 F
m
m
+V
SUPPLY
V
OUT
Figure 8-6. Basic Connections
8.4.2 Supply Voltage
The REF50xx family of voltage references features extremely low dropout voltage. With the exception of the
REF5020, which has a minimum supply requirement of 2.7V, these references can be operated with a supply of
200mV more than the output voltage in an unloaded condition. For loaded conditions, a typical dropout voltage
versus load plot is provided in Figure 6-6.
8.4.3 Negative Reference Voltage
For applications requiring a negative and positive reference voltage, the REF50xx and OPA735 can be used to
provide a dual-supply reference from a 5V supply. Figure 8-7 shows the REF5025 used to provide a 2.5V supply
reference voltage. The low-drift performance of the REF50xx complements the low offset voltage and zero drift
of the OPA735 to provide an accurate solution for split-supply applications. Take care to match the temperature
coefficients of R1 and R2.
-
2.5V
+2.5V
+5V
NOTE:Bypasscapacitorsnotshown.
R
1
10kW
R
2
10kW
-
5V
OPA735
+5V
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM/NR
REF5025
1 F
m
Figure 8-7. The REF5025 and OPA735 Create Positive and Negative Reference Voltages
REF5010, REF5020, REF5025, REF5030, REF5040, REF5045, REF5050
SBOS410L – JUNE 2007 – REVISED OCTOBER 2024
www.ti.com
24
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Copyright © 2024 Texas Instruments Incorporated
Product Folder Links: REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050



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