công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

AD688 bảng dữ liệu(PDF) 7 Page - Analog Devices

tên linh kiện AD688
Giải thích chi tiết về linh kiện  High Precision 10 V Reference
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
Logo AD - Analog Devices

AD688 bảng dữ liệu(HTML) 7 Page - Analog Devices

Back Button AD688_15 Datasheet HTML 3Page - Analog Devices AD688_15 Datasheet HTML 4Page - Analog Devices AD688_15 Datasheet HTML 5Page - Analog Devices AD688_15 Datasheet HTML 6Page - Analog Devices AD688_15 Datasheet HTML 7Page - Analog Devices AD688_15 Datasheet HTML 8Page - Analog Devices AD688_15 Datasheet HTML 9Page - Analog Devices AD688_15 Datasheet HTML 10Page - Analog Devices AD688_15 Datasheet HTML 11Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 16 page
background image
AD688
Rev. B | Page 7 of 16
APPLICATIONS
The AD688 can be configured to provide ±10 V reference
outputs as shown in Figure 4. The architecture of the AD688
provides ground sense and uncommitted output buffer
amplifiers which offer the user a great deal of functional
flexibility. The AD688 is specified and tested in the
configuration shown in Figure 4. The user may choose to take
advantage of other configuration options available with the
AD688; however performance in these configurations is not
guaranteed to meet the stringent data sheet specifications.
Unbuffered outputs are available at Pin 6 and Pin 8. Loading of
these unbuffered outputs will impair circuit performance.
Amplifiers A3 and A4 can be used interchangeably. However,
the AD688 is tested (and the specifications are guaranteed) with
the amplifiers connected as indicated in Figure 4. When either
A3 or A4 is unused, its output force and sense pins should be
connected and the input tied to ground.
Two outputs of the same voltage polarity may be obtained by
connecting both A3 and A4 to the appropriate unbuffered
output on Pin 6 or Pin 8. Performance in these dual output
configurations will typically meet data sheet specifications.
R3
RB
R1
R2
R4
R5
R6
A1
A4
AD688
A3
A2
SYSTEM
GROUND
+10V
+15V SUPPLY
–10V
–15V SUPPLY
SYSTEM
GROUND
0.1
µF
0.1
µF
7
6
4
3
1
14
2
15
16
5
9
10
8
12
11
13
Figure 4. +10 V and −10 V Outputs
CALIBRATION
Generally, the AD688 will meet the requirements of a precision
system without additional adjustment. Initial output voltage
error of 2 mV and output noise specs of 6 µV p-p allow for
accuracies of 12 to 16 bits. However, in applications where an
even greater level of accuracy is required, additional calibration
may be called for. The provision for trimming has been made
through the use of the GAIN ADJ and BAL ADJ pins (Pin 5 and
Pin 12, respectively).
The AD688 provides a precision 20 V span with a center tap
which is used with the buffer and ground sense amplifiers to
achieve the ±10 V output configuration. GAIN ADJ and
BAL ADJ can be used to trim the magnitude of the 20 V span
voltage and the position of the center tap within the span. The
gain adjustment should be performed first. Although the trims
are not interactive within the device, the gain trim will move the
balance trim point as it changes the magnitude of the span.
Figure 5 shows the gain and balance trims of the AD688. A
100 kΩ 20-turn potentiometer is used for each trim. The
potentiometer for the gain trim is connected between Pin 6
(VHIGH) and Pin 8 (VLOW) with the wiper connected to Pin 5
(GAIN ADJ). The potentiometer is adjusted to produce exactly
20 V between Pin 1 and Pin 15, the amplifier outputs. The
balance potentiometer, also connected between Pin 6 and Pin 8
with the wiper to Pin 12 (BAL ADJ), is then adjusted to center
the span from +10 V to −10 V.
Input impedance on both the GAIN ADJ and the BAL ADJ pins
is approximately 150 kΩ. The gain adjustment trim network
effectively attenuates the 20 V across the trim potentiometer by
a factor of about 1150 to provide a trim range of –5.8 mV to
+12.0 mV with a resolution of approximately 900 µV/turn
(20-turn potentiometer). The balance adjustment trim network
attenuates the trim voltage by a factor of about 1250, providing
a trim range of ±8 mV with a resolution of 800 µV/turn.
Trimming the AD688 introduces no additional errors over
temperature, so precision potentiometers are not required.
When balance adjustment is not necessary, Pin 12 should be left
floating. If gain adjustment is not required, Pin 5 should also be
left floating.
R3
RB
R1
R2
R4
R5
R6
A1
A4
AD688
A3
A2
SYSTEM
GROUND
+10V
+15V SUPPLY
–10V
–15V SUPPLY
SYSTEM
GROUND
0.1
µF
0.1
µF
100k
20T
BALANCE
ADJUST
100k
20T
GAIN ADJUST
+15V
NOISE
REDUCTION
1
µF
7
6
4
3
1
14
2
15
16
5
9
10
8
12
11
13
20k
Figure 5. Gain and Balance Adjustment with Noise Reduction


Số phần tương tự - AD688_15

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Analog Devices
AD688AQ AD-AD688AQ Datasheet
406Kb / 8P
   High Precision -10 V Reference
REV. A
AD688AQ AD-AD688AQ Datasheet
490Kb / 16P
   High Precision 10 V Reference
REV. B
AD688ARWZ AD-AD688ARWZ Datasheet
490Kb / 16P
   High Precision 10 V Reference
REV. B
AD688BQ AD-AD688BQ Datasheet
406Kb / 8P
   High Precision -10 V Reference
REV. A
AD688BQ AD-AD688BQ Datasheet
490Kb / 16P
   High Precision 10 V Reference
REV. B
More results

Mô tả tương tự - AD688_15

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Analog Devices
AD688 AD-AD688 Datasheet
406Kb / 8P
   High Precision -10 V Reference
REV. A
AD587 AD-AD587_15 Datasheet
361Kb / 12P
   High Precision 10 V Reference
Rev. H
AD587 AD-AD587 Datasheet
177Kb / 12P
   High Precision 10 V Reference
REV. F
5962-8982502PA AD-5962-8982502PA Datasheet
361Kb / 12P
   High Precision 10 V Reference
Rev. H
AD688ARWZ AD-AD688ARWZ Datasheet
490Kb / 16P
   High Precision 10 V Reference
REV. B
AD581SH883B AD-AD581SH883B Datasheet
329Kb / 12P
   High Precision 10 V IC Reference
REV. C
AD581 AD-AD581_15 Datasheet
329Kb / 12P
   High Precision 10 V IC Reference
REV. C
AD581SH AD-AD581SH Datasheet
329Kb / 12P
   High Precision 10 V IC Reference
REV. C
AD581 AD-AD581 Datasheet
329Kb / 12P
   High Precision 10 V IC Reference
REV. C
REF01 AD-REF01 Datasheet
384Kb / 12P
   10 V Precision Voltage Reference
REV. C
More results


Html Pages

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


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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