データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

Preview PDF HTML

REF5025A データシート(PDF) 10 Page - Texas Instruments

部品番号 REF5025A
部品情報  LOW-NOISE, VERY LOW DRIFT, PRECISION VOLTAGE REFERENCE
PDF  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

REF5025A データシート(HTML) 10 Page - Texas Instruments

Back Button REF5025A Datasheet HTML 6Page - Texas Instruments REF5025A Datasheet HTML 7Page - Texas Instruments REF5025A Datasheet HTML 8Page - Texas Instruments REF5025A Datasheet HTML 9Page - Texas Instruments REF5025A Datasheet HTML 10Page - Texas Instruments REF5025A Datasheet HTML 11Page - Texas Instruments REF5025A Datasheet HTML 12Page - Texas Instruments REF5025A Datasheet HTML 13Page - Texas Instruments REF5025A Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 19 page
background image
R5
60kW
REF50xx
TEMP
V
OUT
GND
TRIM/NR
V
IN
aT
aT
(10 A
m
at+25 C)
°
R2
R1
R3
R4
10kW
1kW
1.2V
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM/NR
REF50xx
+V
SUPPLY
10kW
1kW
470W
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
DNC
TEMP
V
OUT
V
IN
GND
DNC
NC
TRIM/NR
REF50xx
C1
1 F
m
+V
SUPPLY
REF5020-Q1, REF5025-Q1, REF5030-Q1
REF5040-Q1, REF5045-Q1, REF5050-Q1
SBOS456F
– SEPTEMBER 2008 – REVISED SEPTEMBER 2011
www.ti.com
APPLICATION INFORMATION
The REF50xx is family of low-noise, precision
requirement of 2.7 V, these references can be
bandgap voltage references that are specifically
operated with a supply of 200 mV above the output
designed for excellent initial voltage accuracy and
voltage
in
an
unloaded
condition.
For
loaded
drift. Figure 28 shows a simplified block diagram of
conditions, a typical dropout voltage versus load plot
the REF50xx.
is shown in Figure 6 of the Typical Characteristics.
USING THE TRIM/NR PIN
The REF50xx provides a very accurate voltage
output. However, VOUT can be adjusted to reduce
noise and shift the output voltage from the nominal
value by configuring the trim and noise reduction pin
(TRIM/NR, pin 5). The TRIM/NR pin provides a
±15-mV adjustment of the device bandgap, which
produces a
±15-mV change on the VOUT pin.
Figure 30 shows a typical circuit using the TRIM/NR
pin to adjust VOUT. When using this technique, the
temperature coefficients of the resistors can degrade
the temperature drift at the output.
Figure 28. REF50xx Simplified Block Diagram
BASIC CONNECTIONS
Figure 29 shows the typical connections for the
REF50xx.
A
supply
bypass
capacitor
ranging
between 1
μF to 10 μF is recommended. A 1-μF to
50-
μF, low-ESR output capacitor (CL) must be
connected from VOUT to GND. The ESR value should
Figure 30. VOUT Adjustment Using TRIM/NR Pin
be less than or equal to 1.5
Ω. The ESR minimizes
gain peaking of the internal 1.2-V reference and thus
The REF50xx allows access to the bandgap through
reduces noise at the VOUT pin.
the TRIM/NR pin. Placing a capacitor from the
TRIM/NR pin to GND (as Figure 31 illustrates) in
combination with the internal 1-k
Ω resistor creates a
low-pass filter that lowers the overall noise measured
on the VOUT pin. A capacitance of 1 μF is suggested
for a low-pass filter with a corner frequency of
14.5 Hz. Higher capacitance results in a lower cutoff
frequency.
Figure 29. Basic Connections
SUPPLY VOLTAGE
The REF50xx family of voltage references features
extremely low dropout voltage. With the exception of
the
REF5020,
which
has
a
minimum
supply
Figure 31. Noise Reduction Using TRIM/NR Pin
10
Submit Documentation Feedback
Copyright
© 2008–2011, Texas Instruments Incorporated



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


データシート ダウンロード

Go To PDF Page


リンク URL



ALLDATASHEETはお客様のビジネスに役立ちますか？  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   データシートへのリンク    |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com