TC9400COD Microchip Technology, TC9400COD Datasheet - Page 10
![IC V-FREQ/FREQ-V CONV 14SOIC](/photos/6/59/65933/150-14-soic_sml.jpg)
TC9400COD
Manufacturer Part Number
TC9400COD
Description
IC V-FREQ/FREQ-V CONV 14SOIC
Manufacturer
Microchip Technology
Type
Volt to Freq & Freq to Voltr
Datasheet
1.TC9402CPD.pdf
(28 pages)
Specifications of TC9400COD
Package / Case
14-SOIC (0.154", 3.90mm Width)
Frequency - Max
100kHz
Full Scale
±40ppm/°C
Linearity
±0.05%
Mounting Type
Surface Mount
Frequency
100kHz
Linearity %
0.05%
Supply Voltage Range
± 4V To ± 7.5V
Digital Ic Case Style
SOIC
No. Of Pins
14
Svhc
No SVHC (15-Dec-2010)
Base Number
9400
Converter
RoHS Compliant
Supply Voltage (max)
15 V
Supply Voltage (min)
8 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Dual Supply Voltage
+/- 5 V
Full Scale Frequency
100 KHz
Linearity Error
+/- 0.25 % FSR
Maximum Dual Supply Voltage
+/- 7.5 V
Minimum Dual Supply Voltage
+/- 4 V
Mounting Style
SMD/SMT
Operating Supply Voltage
9 V, 12 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC9400COD713
Manufacturer:
MICROCHIP
Quantity:
12 000
TC9400/9401/9402
4.0
4.1
The output frequency (F
input voltage (V
EQUATION 4-1:
4.2
4.2.1
The value of this component is chosen to give a full
scale input current of approximately 10 µA:
EQUATION 4-2:
EQUATION 4-3:
Note that the value is an approximation and the exact
relationship is defined by the transfer equation. In
practice, the value of R
obtain full scale frequency at V
Section 4.3 “Adjustment Procedure”, Adjustment
Procedure). Metal film resistors with 1% tolerance or
better are recommended for high accuracy applications
because of their thermal stability and low noise
generation.
4.2.2
The exact value is not critical but is related to C
the relationship:
Improved stability and linearity are obtained when
C
although mica and ceramic devices can be used in
applications where their temperature limits are not
exceeded. Locate as close as possible to Pins 12
and 13.
DS21483D-page 10
INT
≤ 4C
Frequency Out
VOLTAGE-TO-FREQUENCY
(V/F) CONVERTER DESIGN
INFORMATION
Input/Output Relationships
External Component Selection
REF
R
C
. Low leakage types are recommended,
IN
INT
3C
IN
R
IN
) by the transfer equation:
R
REF
IN
≅
≅
V
≤
IN
=
IN
10
C
10V
OUT
typically would be trimmed to
INT
V
--------
R
FULL SCALE
μ
10
IN
IN
A
) is related to the analog
≤
•
μ
= 1 M
A
10C
----------------------------------- -
(
V
REF
IN
REF
Ω
) C
1
(
full scale (see
REF
)
REF
by
4.2.3
The exact value is not critical and may be used to trim
the full scale frequency (see Section 6.1 “Input/Out-
put Relationships”, Input/Output Relationships).
Glass film or air trimmer capacitors are recommended
because of their stability and low leakage. Locate as
close as possible to Pins 5 and 3 (see
FIGURE 4-1:
V
4.2.4
Power supplies of ±5V are recommended. For high
accuracy requirements, 0.05% line and load regulation
and 0.1 µF disc decoupling capacitors, located near the
pins, are recommended.
4.3
Figure 3-1
location. Full scale may be trimmed by adjusting R
V
full scale frequency is as follows:
1.
2.
If adjustments are performed in this order, there should
be no interaction and they should not have to be
repeated.
4.4
A TC9400, which operates from a single 12 to 15V
variable power source, is shown in
circuit uses two Zener diodes to set stable biasing
levels for the TC9400. The Zener diodes also provide
the reference voltage, so the output impedance and
temperature coefficient of the Zeners will directly affect
power supply rejection and temperature performance.
Full scale adjustment is accomplished by trimming the
input current.
REF
REF
Set V
to obtain a 10 Hz output frequency.
Set V
to obtain a 10 kHz output frequency.
, or C
.
Adjustment Procedure
Improved Single Supply V/F
Converter Operation
500
400
300
200
100
IN
IN
REF
C
V
0
shows a circuit for trimming the zero
to 10V and trim either R
to 10 mV and trim the zero adjust circuit
DD
REF
. Recommended procedure for a 10 kHz
, V
-1
SS
-2
Recommended C
10 kHz
© 2007 Microchip Technology Inc.
V
-3
100 kHz
REF
-4
(V)
IN
V
V
R
V
T
-5
A
DD
SS
IN
IN
, V
Figure
Figure
= +25°C
= +10V
= 1MW
REF
= -5V
= +5V
-6
REF
, or C
4-2. This
4-1).
-7
vs.
REF
IN
,