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9000 Series
Frequency to Voltage Converters
For Precise Linear Conversion of Periodic Frequency Information into
Proportionally Equivalent Analog Output voltage
Models 9110, 9112 -- 0 to 100 kHz
Models 9010, 9012 -- 0 to 10 kHz
Models 9200, 9201, 9202 -- 0 to 1 kHz
Features
Peak Ripple Levels Down to
5 mV Typ.
±± 50 mV Adjustable Offset
Temperature Coefficients Down
to 10 ppm /
°°C Max.
Linearity Within 0.01% Max.
Over The Entire Frequency
Range
Input Threshold Adjustable to
40 mV
Applications
Frequency Metering
Feedback Servo Control
Power Control
Microprocessor-Based Process
Control
Doppler Sonar and Radar
Remote Data Transmission
Phase-Locked Loops
Tachometer Systems
Radiation Detectors
Flow Meters
Numerical Control
Broadband Discriminators
Description
Dymec’s Frequency to Voltage Converters are considerably lower in
cost and easier to use in complex circuits than conventional Digital to
Analog Converters of comparable accuracy. Utmost flexibility is al-
lowed in the form factor of the input frequency waveform, and a spe-
cial internal timing section makes these Frequency to Voltage Convert-
ers insensitive to variations in input wave duty cycle.
Models 9110, 9010, and 9200 are available in three Temperature
Compensation ranges. They provide extremely tight linearity, accu-
racy, and performance levels, and are complementary to Dymec’s high
performance Series 8000 Voltage to Frequency Converters, with no
compromise in system performance.
CM
C1
+ 15V
1.5K
12K
62K
-
+
A1
(0 to
+15V)
F / F
One-Shot
Frequency Input
Threshold
CMOS
Switch
- Vref
Variable
Filter
+ 15V
- 15V
50K
+
-
A2
Output
FS Adj
Sum Pt
Zero Adj
RA
RB
R
C
9110
9010
9200
RA =
10 M
30 M
RB =
30 k
90 M
RC = 100
200
CM = 620 pf
.01
f
.22
f
R
_
Q
+ 15V
- 15V
GND
Analog Com.
BLOCK DIAGRAM
Q