поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

AD652 датащи(PDF) 4 Page - Analog Devices

номер детали AD652
подробное описание детали  Monolithic Synchronous Voltage-to-Frequency Converter
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD652 датащи(HTML) 4 Page - Analog Devices

  AD652 Datasheet HTML 1Page - Analog Devices AD652 Datasheet HTML 2Page - Analog Devices AD652 Datasheet HTML 3Page - Analog Devices AD652 Datasheet HTML 4Page - Analog Devices AD652 Datasheet HTML 5Page - Analog Devices AD652 Datasheet HTML 6Page - Analog Devices AD652 Datasheet HTML 7Page - Analog Devices AD652 Datasheet HTML 8Page - Analog Devices AD652 Datasheet HTML 9Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 16 page
background image
AD652
REV. B
–4–
ORDERING GUIDE
Gain
Drift
Specified
Part
ppm/ C
1 MHz
Temperature
Package
Number
1
100 kHz
Linearity %
Range C
Options
2
AD652JP
50 max
0.02 max
0 to +70
PLCC (P-20A)
AD652KP
25 max
0.005 max
0 to +70
PLCC (P-20A)
AD652AQ
50 max
0.02 max
–40 to +85
Cerdip (Q-16)
AD652BQ
25 max
0.005 max
–40 to +85
Cerdip (Q-16)
AD652SQ
50 max
0.02 max
–55 to +125
Cerdip (Q-16)
NOTES
1For details on grade and package offerings screened in accordance with MIL-
STD-883, refer to the Analog Devices Military Products Databook or current
AD652/883 data sheet.
2P = Plastic Leaded Chip Carrier; Q = Cerdip.
PIN CONFIGURATIONS
PIN
Q-16 PACKAGE
P-20A PACKAGE
1+VS
NC
2
TRIM
+VS
3
TRIM
NC
4
OP AMP OUT
OP AMP OUT
5
OP AMP “—”
OP AMP “—”
6
OP AMP “+”
OP AMP “+”
7
10 VOLT INPUT
5 VOLT INPUT
8–VS
10 VOLT INPUT
9COS
8 VOLT INPUT
10
CLOCK INPUT
OPTIONAL 10 V INPUT
11
FREQ OUT
–VS
12
DIGITAL GND
COS
13
ANALOG GND
CLOCK INPUT
14
COMP “—”
FREQ OUT
15
COMP “+“
DIGITAL GROUND
16
COMP REF
ANALOG GND
17
COMP “—”
18
COMP “+”
19
NC
20
COMP REF
THEORY OF OPERATION
A synchronous VFC is similar to other voltage-to-frequency
converters in that an integrator is used to perform a charge-
balance of the input signal with an internal reference current.
However, rather than using a one-shot as the primary timing
element which requires a high quality and low drift capacitor,
a synchronous voltage-to-frequency converter (SVFC) uses an
external clock; this allows the designer to determine the system
stability and drift based upon the external clock selected. A crys-
tal oscillator may also be used if desired.
The SVFC architecture provides other system advantages besides
low drift. If the output frequency is measured by counting
pulses gated to a signal which is derived from the clock, the
clock stability is unimportant and the device simply performs as a
voltage controlled frequency divider, producing a high resolution
A/D. If a large number of inputs must be monitored simulta-
neously in a system, the controlled timing relationship between
the frequency output pulses and the user supplied clock greatly
simplifies this signal acquisition. Also, if the clock signal is pro-
vided by a VFC, then the output frequency of the SVFC will be
proportional to the product of the two input voltages.
Hence, multiplication and A-to-D conversion on two signals are
performed simultaneously.
Figure 1a. Cerdip Pin Configuration
The pinouts of the AD652 SVFC are shown in Figure 1. A
block diagram of the device configured as a SVFC, along with
various system waveforms, is shown in Figure 2.
Figure 1b. PLCC Pin Configuration
Figure 2 shows the typical up-and-down ramp integrator output
of a charge-balance VFC. After the integrator output has crossed
the comparator threshold and the output of the AND gate has
gone high, nothing happens until a negative edge of the clock
comes along to transfer the information to the output of the
D-FLOP. At this point, the clock level is low, so the latch does
not change state. When the clock returns high, the latch output
goes high and drives the switch to reset the integrator. At the
same time the latch drives the AND gate to a low output state.
On the very next negative edge of the clock the low output state
of the AND gate is transferred to the output of the D-FLOP
and then when the clock returns high, the latch output goes low
and drives the switch back into the Integrate Mode. At the same
time the latch drives the AND gate to a mode where it will truth-
fully relay the information presented to it by the comparator.
Since the reset pulses applied to the integrator are exactly one
clock period long, the only place where drift can occur is in a
variation of the symmetry of the switching speed with tempera-
ture. Since each reset pulse is identical to every other, the AD652
SVFC produces a very linear voltage to frequency transfer rela-
tion. Also, since all of the reset pulses are gated by the clock,


Аналогичный номер детали - AD652

производительномер деталидатащиподробное описание детали
logo
Analog Devices
AD652 AD-AD652 Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652 AD-AD652 Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652 AD-AD652 Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652 AD-AD652 Datasheet
631Kb / 29P
   Monolithic Synchronous Voltage-to-Frequency Converter
AD6526 AD-AD6526 Datasheet
86Kb / 1P
   GSM/GPRS Digital Baseband Processor
Rev. PrA
More results

Аналогичное описание - AD652

производительномер деталидатащиподробное описание детали
logo
Analog Devices
AD652JPZ-REEL AD-AD652JPZ-REEL Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652KPZ AD-AD652KPZ Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652 AD-AD652_15 Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652 AD-AD652_17 Datasheet
631Kb / 29P
   Monolithic Synchronous Voltage-to-Frequency Converter
AD652JPZ AD-AD652JPZ Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD652KPZ-REEL AD-AD652KPZ-REEL Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD651 AD-AD651 Datasheet
1Mb / 16P
   Monolithic Synchronous Voltage-to-Frequency Converter
AD652KPZ-REEL AD-AD652KPZ-REEL Datasheet
786Kb / 28P
   Monolithic Synchronous Voltage-to-Frequency Converter
REV. C
AD654 AD-AD654_17 Datasheet
410Kb / 13P
   Low Cost Monolithic Voltage-to-Frequency Converter
AD654 AD-AD654_15 Datasheet
359Kb / 12P
   Low Cost Monolithic Voltage-to-Frequency Converter
REV. C
More results


Html Pages

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


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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