參數(shù)資料
型號： AD652SQ
廠商： Analog Devices Inc
文件頁數(shù)： 14/28頁
文件大?。?/td> 779K
描述： IC V-F CONV SYNCH MONO 5V 16CDIP
標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝： 16-CDIP
包裝： 管件
AD652
 
Rev. C | Page 14 of 28
SINGLE-SUPPLY OPERATION
In addition to the Digital Ground being connected to V
S
, it is
also possible to connect Analog Ground to V
S
 of the AD652.
Thus, the device is truly operating from a single-supply voltage
that can range from 12 V to 36 V. This is shown in Figure 21 for
a positive voltage input, and in Figure 20 for a negative voltage
input.
In Figure 21, the comparator reference is used as a derived
ground; the input voltage is referred to this point as well as to
the op amp common mode (Pin 6 is tied to Pin 16). Since the
input signal source must drive 0.5 mA of full-scale signal
current into Pin 7, it must also draw the exact same current
from the input reference potential. This current is therefore
provided by the 5 V reference.
In single-supply operation, an external resistor, RPULLUP, is
necessary between the power supply, +V
S
, and the 5 V reference
output. This resistor should be selected such that a current of
approximately 500 礎(chǔ) flows during operation. For example,
with a power supply voltage of +15 V, a 20 k& resistor is selected
((15 V5 V)/500 礎(chǔ) = 20 k&).
Figure 20 shows the negative voltage input configuration for
using the AD652 in single-supply mode. In this mode, the signal
source is driving the + input of the op amp, which requires only
20 nA (typical) compared to the 0.5 mA required in the positive
input voltage configuration. The voltage at Pin 6 may go as low
as 4 V above ground (V
S
 Pin 8). Since the input reference is 5.0
V above ground, this leaves a 1 V window for the input signal.
To drive the integrating capacitor with a 0.5 mA full-scale
current, it is necessary to provide an external 2 k& resistor. This
results in a 2 k& resistor and a 1 V input range. The external
2 k& resistor should be a low TC metal-film type for lowest
drift degradation.
 
+V
S
1
2
3
4

+
5
6
7
8
16
15
14
13
12
11
10
9
ONE
SHOT
AND
"D"
FLOP
Q CK
D
Q
1mA
20k&
2k&
AD652
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
5V
REFERENCE
R
L
5V
CLOCK
ANALOG
GND
DIGITAL
GND
C
OS
C
INT
SIGNAL
SOURCE
1V FULL SCALE
INPUT
REFERENCE
R
PULLUP
 
Figure 20. Single-Supply Mode Negative Voltage Input
+V
S
1
2
3
4

+
5
6
7
8
16
15
14
13
12
11
10
9
ONE
SHOT
AND
"D"
FLOP
Q CK
D
Q
1mA
20k&
AD652
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
5V
REFERENCE
R
L
5V
CLOCK
ANALOG
GND
DIGITAL
GND
FREQ
OUT
C
OS
C
INT
SIGNAL
SOURCE
ANALOG
GND
I
SIGNAL
0.5mA
FULL SCALE
INPUT
REFERENCE
R
PULLUP
I
SIGNAL
 
Figure 21. Single-Supply Mode Positive Voltage Input
 
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相關(guān)代理商/技術(shù)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(biāo)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(fēng)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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