Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

VFC320 Datasheet(PDF) 5 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # VFC320
Description  Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

VFC320 Datasheet(HTML) 5 Page - Burr-Brown (TI)

  VFC320 Datasheet HTML 1Page - Burr-Brown (TI) VFC320 Datasheet HTML 2Page - Burr-Brown (TI) VFC320 Datasheet HTML 3Page - Burr-Brown (TI) VFC320 Datasheet HTML 4Page - Burr-Brown (TI) VFC320 Datasheet HTML 5Page - Burr-Brown (TI) VFC320 Datasheet HTML 6Page - Burr-Brown (TI) VFC320 Datasheet HTML 7Page - Burr-Brown (TI) VFC320 Datasheet HTML 8Page - Burr-Brown (TI) VFC320 Datasheet HTML 9Page - Burr-Brown (TI)  
Zoom Inzoom in Zoom Outzoom out
 5 / 9 page
background image
®
VFC320
5
In the time t1 + t2 the integrator capacitor C2 charges and
discharges but the net voltage change is zero.
Thus
∆Q = 0 = I
IN t1 + (IIN – IA) t2
So that IIN (t1 + t2) = IA t2
But since t1 + t2 =
and IIN =
fOUT =
In the time t1, IB charges the one-shot capacitor C1 until its
voltage reaches –7.5V and trips comparator B.
Thus t2 =
Using (7) in (6) yield fOUT =
X
Since IA = IB the result is
fOUT =
Since the integrating capacitor, C2, affects both the rising
and falling segments of the ramp voltage, its tolerance and
temperature coefficient do not affect the output frequency. It
should, however, have a leakage current that is small com-
pared to IIN, since this parameter will add directly to the gain
error of the VFC. C1, which controls the one-shot period,
should be very precise since its tolerance and temperature
coefficient add directly to the errors in the transfer function.
begins to ramp down again before the input amplifier has a
chance to saturate. In effect the comparators and flip-flop
form a one-shot whose period is determined by the internal
reference and a 1mA current sink plus the external capacitor,
C1. After the one-shot resets, fOUT changes back to logic 0
and the cycle begins again.
The transfer function for the VFC320 is derived for the
circuit shown in Figure 4. Detailed waveforms are shown in
Figure 5.
fOUT =
1
t
1 + t2
0V
–7.5V
∆V
OUT
t
1
t
2
FIGURE 5. Integrator and VFC Output Timing.
(1)
FIGURE 4. Functional Block Diagram of the VFC320.
f
OUT
V
IN
1
R
1
I
A R2 R2
V
IN
C
IN 7.5
I
B
7.5 R
1 C1
V
IN
(3)
(2)
(4), (5)
(6)
(7)
(9)
V
IN
I
B
I
A
(8)
7.5 R
1 C1
Comparators
Flip-
flop
Common
f
OUT
f
IN
One-shot
V
OUT
2
4
I
A
I
IN
e
1
e
2
Switch
C
1
One-shot
Capacitor
–V
CC
38
9
+V
CC
6
Pull-up
Resitor
R
2
7
10
Input
Amp
Constant
Current Sinks
(1mA)
–7.5V
Ref
B
Integrating
Capacitor
R
1
Input Resistor
Q
1
C
2
I
B
A
For Postive Input Voltages use e
1, short e2.
For Negative Input Voltages use e
2, short e1.
For Differental Input Voltages use e
1 and e2.
V
IN:
Pin numbers shown for “M” package (TO-100)
f
OUT =
V
IN
7.5 R
1 C1
+V
PULL-UP (VPU)
(5V to 15V Typically)
1


Similar Part No. - VFC320

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
VFC320 TI-VFC320 Datasheet
233Kb / 12P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
VFC320 TI1-VFC320 Datasheet
233Kb / 11P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
VFC320BG TI-VFC320BG Datasheet
233Kb / 12P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
VFC320BM TI-VFC320BM Datasheet
233Kb / 12P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
VFC320BM2 TI-VFC320BM2 Datasheet
233Kb / 12P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
More results

Similar Description - VFC320

ManufacturerPart #DatasheetDescription
logo
Burr-Brown (TI)
VFC32 BURR-BROWN-VFC32 Datasheet
76Kb / 7P
   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
logo
Analog Devices
AD650 AD-AD650_17 Datasheet
449Kb / 21P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
ADVFC32 AD-ADVFC32_15 Datasheet
345Kb / 6P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
Rev. B
logo
Texas Instruments
VFC32 TI1-VFC32 Datasheet
411Kb / 11P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
logo
Analog Devices
ADVFC32 AD-ADVFC32 Datasheet
141Kb / 6P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
REV. A
AD650 AD-AD650 Datasheet
284Kb / 12P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
REV. C
AD650 AD-AD650_15 Datasheet
392Kb / 20P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
REV. E
ADVFC32 AD-ADVFC32_17 Datasheet
375Kb / 7P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
ADVFC32KNZ AD-ADVFC32KNZ Datasheet
345Kb / 6P
   Voltage-to-Frequency and Frequency-to-Voltage Converter
REV. B
logo
Texas Instruments
VFC320 TI-VFC320 Datasheet
233Kb / 12P
[Old version datasheet]   Voltage-to-Frequency and Frequency-to-Voltage CONVERTER
More results


Html Pages

1 2 3 4 5 6 7 8 9


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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