參數(shù)資料
型號： AD652SQ
廠商： Analog Devices Inc
文件頁數(shù)： 10/28頁
文件大?。?/td> 779K
描述： IC V-F CONV SYNCH MONO 5V 16CDIP
標準包裝： 1
類型： 電壓至頻率
頻率 - 最大： 2MHz
全量程： ±25ppm/°C
線性： ±0.005%
安裝類型： 通孔
封裝/外殼： 16-CDIP（0.300"，7.62mm）
供應商設備封裝： 16-CDIP
包裝： 管件
AD652
 
Rev. C | Page 10 of 28
+V
S
1
2
3
4
5
6
7
V
S
8
16
15
14
13
12
11
10
9
ONE
SHOT
AND
"D"
FLOP
Q CK
D
Q
1mA
20k&
20k&
AD652
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
5V
REFERENCE
R
L
5V
CLOCK
C
OS
ANALOG
GND
DIGITAL
GND
FREQ
OUT
C
INT
V
IN
?SPAN class="pst AD652SQ_2632819_3">5V
 
Figure 10. Bipolar Offset
SVFC CONNECTION FOR BIPOLAR INPUT VOLTAGES
A bipolar input voltage of ? V can be accommodated by
injecting a 250 礎 current into Pin 5 (see Figure 10). A 5 V
signal provides a zero sum current at the integrator summing
junction, which results in a zero-output frequency; a +5 V signal
provides a 0.5 mA (full-scale) sum current, which results in the
full-scale output frequency.
Using an external resistor to inject the offset current has some
effect on the bipolar offset temperature coefficient. The ideal
transfer curve with bipolar inputs is shown in Figure 11. The
user actually has four options to use in injecting the bipolar
offset current into the inverting input of the op amp:
1. Use an external resistor for ROS and the internal 20 k&
resistor for RIN (as shown in Figure 10).
2. Use the internal 20 k& resistor as R
OS
 and an external R
IN
3. Use two external resistors.
4. Use two internal resistors for R
IN
 and R
OS
 (available on
PLCC version only).
Option 4 provides the closest to the ideal transfer function as
diagrammed in Figure 11. Figure 12 shows the effects of the
transfer relation on the other three options. In the first case, the
slope of the transfer function is unchanged with temperature.
However, V
ZERO
 (the input voltage required to produce an output
frequency of 0 Hz) and F
ZERO
 (the output frequency when
V
IN
 = 0 V) changes as the transfer function is displaced parallel
to the voltage axis with temperature. In the second case, FZERO
remains constant, but VZERO changes as the transfer function
rotates about FZERO with temperature changes. In the third case,
with two external resistors, the VZERO point remains invariant
while the slope and offset of the transfer function change with
temperature. If selecting this third option, the user should select
low drift, matched resistors.
V
REF
IN
R
OS
R
IN
IDEAL
TRANSFER
RELATION
V
ZERO
F
OUT
F
ZERO
5V
+5V
V
IN
 
Figure 11. Ideal Bipolar Input Transfer Curve over Temperature
IDEAL
F
OUT
F
ZERO
V
IN
TEMPERATURE
PERTURBED
TRANSFER
V
ZERO
5V
CASE 1
R
IN
< INTERNAL
R
OS
< EXTERNAL
IDEAL
F
OUT
F
ZERO
V
IN
TEMPERATURE
PERTURBED
V
ZERO
5V
CASE 2
R
IN
< EXTERNAL
R
OS
< INTERNAL
IDEAL
F
OUT
F
ZERO
V
IN
TEMPERATURE
PERTURBED
V
ZERO
5V
CASE 3
R
IN
< EXTERNAL
R
OS
< EXTERNAL
 
Figure 12. Actual Bipolar Input Transfer over Temperature
 
 
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相關代理商/技術參數(shù)
參數(shù)描述
AD652SQ/883B 功能描述:電壓頻率轉(zhuǎn)換及頻率電壓轉(zhuǎn)換 IC - SYNC V/F CONVERTER RoHS:否 制造商:Texas Instruments 全標度頻率:4000 KHz 線性誤差:+/- 1 % FSR 電源電壓-最大: 電源電壓-最小: 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格:Through Hole 封裝 / 箱體:PDIP-14 封裝:Tube
AD652SQ/883B2 制造商:AD 制造商全稱:Analog Devices 功能描述:Monolithic Synchronous Voltage-to-Frequency Converter
AD652SQ2 制造商:AD 制造商全稱:Analog Devices 功能描述:Monolithic Synchronous Voltage-to-Frequency Converter
AD652SQ883B2 制造商:AD 制造商全稱:Analog Devices 功能描述:Monolithic Synchronous Voltage-to-Frequency Converter
AD652SW 制造商:AD 制造商全稱:Analog Devices 功能描述:Monolithic Synchronous Voltage-to-Frequency Converter
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