TelCom Semiconductor Inc TC9402EJD, TC9402CPD, TC9401EJD, TC9401CPD, TC9400EJD Datasheet
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TC9400
TC9401
TC9402
VOLTAGE-TO-FREQUENCY/FREQUENCY-TO-VOLTAGE CONVERTERS
1
FEATURES
Voltage-to-Frequency
■ Choice of Guaranteed Linearity:
TC9401.........................................................0.01%
TC9400.........................................................0.05%
TC9402.........................................................0.25%
■ DC to 100 kHz (F/V) or 1Hz to 100kHz (V/F)
■ Low Power Dissipation .......................... 27mW Typ
■ Single/Dual Supply Operation .................................
+ 8V to + 15V or ± 4V to ± 7.5V
■ Gain Temperature Stability ..........± 25 ppm/°C Typ
■ Programmable Scale Factor
Frequency-to-Voltage
■ Operation........................................... DC to 100 kHz
■ Choice of Guaranteed Linearity:
TC9401.........................................................0.02%
TC9400.........................................................0.05%
TC9402.........................................................0.25%
■ Programmable Scale Factor
APPLICATIONS
■ µP Data Acquisition
■ 13-Bit Analog-to-Digital Converters
■ Analog Data Transmission and Recording
■ Phase-Locked Loops
■ Frequency Meters/Tachometer
■ Motor Control
■ FM Demodulation
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
The TC9400/TC9401/TC9402 are low-cost voltage-tofrequency (V/F) converters utilizing low power CMOS
technology. The converters accept a variable analog input
signal and generate an output pulse train whose frequency
is linearly proportional to the input voltage.
The devices can also be used as highly-accurate frequency-to-voltage (F/V) converters, accepting virtually any
input frequency waveform and providing a linearly-proportional voltage output.
A complete V/F or F/V system only requires the addition
of two capacitors, three resistors, and reference voltage.
ORDERING INFORMATION
Linearity Temperature
Part No. (V/F) Package Range
TC9400COD 0.05% 14-Pin 0°C to +70°C
SOIC (Narrow)
TC9400CPD 0.05% 14-Pin 0°C to +70°C
Plastic DIP
TC9400EJD 0.05% 14-Pin – 40°C to +85°C
CerDIP
TC9401CPD 0.01% 14-Pin 0°C to +70°C
Plastic DIP
TC9401EJD 0.01% 14-Pin – 40°C to +85°C
CerDIP
TC9402CPD 0.25% 14-Pin 0°C to +70°C
Plastic DIP
TC9402EJD 0.25% 14-Pin – 40°C to +85°C
CerDIP
2
3
4
5
6
Integrator
Capacitor
R
Input
Voltage
TELCOM SEMICONDUCTOR, INC.
IN
I
IN
Reference
Capacitor
Reference
Voltage
I
REF
Integrator
OpAmp
Threshold
Detector
TC9400
One
Shot
Pulse Output
7
÷2
Pulse/2 Output
8
TC9400/1/2-5 11/6/96
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TC9400
TC9401
TC9402
VOLTAGE-TO-FREQUENCY/
FREQUENCY-TO-VOLTAGE CONVERTERS
ABSOLUTE MAXIMUM RATINGS*
VDD – VSS................................................................. +18V
IIN...........................................................................10mA
V
Max –V
OUT
V
– VSS..............................................................– 1.5V
REF
Storage Temperature Range ................– 65°C to +150°C
Common..........................................23V
OUT
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
Operating Temperature Range
C Device ................................................0°C to +70°C
E Device ...........................................– 40°C to +85°C
Package Dissipation (TA ≤ 70°C)
8-Pin CerDIP ..................................................800mW
8-Pin Plastic DIP.............................................730mW
8-Pin SOIC .....................................................470mW
Lead Temperature (Soldering, 10 sec) .................+300°C
ELECTRICAL CHARACTERISTICS: V
= +5V, VSS = – 5V, V
DD
GND
= 0V, V
= – 5V, R
REF
= 100kΩ,
BIAS
Full Scale = 10kHz, unless otherwise specified. TA = +25°C, unless temperature range is specified (– 40°C to +85°C
for E device, 0°C to +70°C for C device).
VOLTAGE-TO-FREQUENCY TC9401 TC9400 TC9402
Parameter Definition Min Typ Max Min Typ Max Min Typ Max Unit
Accuracy
Linearity 10 kHz Output Deviation From Straight — 0.004 0.01 — 0.01 0.05 — 0.05 0.25 % Full
Line Between Normalized Zero Scale
and Full-Scale Input
Linearity 100 kHz Output Deviation From Straight — 0.04 0.08 — 0.1 0.25 — 0.25 0.5 % Full
Line Between Normalized Zero Scale
Reading and Full-Scale Input
Gain Temperature Variation in Gain A Due to — ± 25 ± 40 — ± 25 ± 40 — ± 50 ± 1 00 ppm/°C
Drift (Note 1) Temperature Change Full Scale
Gain Variance Variation From Ideal Accuracy — ± 10 – — ± 10 — — ± 10 – % of
Nominal
Zero Offset (Note 2) Correction at Zero Adjust for Zero — ± 10 ± 50 — ± 10 ± 50 — ± 20 ± 100 mV
Output When Input is Zero
Zero Temperature Variation in Zero Offset Due to — ± 25 ± 50 — ± 25 ± 50 — ± 50 ± 100 µV/°C
Drift (Note 1) Temperature Change
Analog Input
IIN Full Scale Full-Scale Analog Input Current to — 10 — — 10 — 10 — µA
Achieve Specified Accuracy
IIN Overrange Overrange Current — — 50 — — 50 — — 50 µA
Response Time Settling Time to 0.1% Full Scale — 2 — — 2 — — 2 — Cycle
Digital Section
V
@ IOL = 10mA Logic "0" Output Voltage (Note 3) — 0.2 0.4 — 0.2 0.4 — 0.2 0.4 V
SAT
V
Max – V
OUT
Common (Note 4) and Common
Pulse Frequency — 3 — — 3 — — 3 — µsec
Output Width
OUT
Voltage Range Between Output — — 18 — — 18 — — 18 V
3-288
TELCOM SEMICONDUCTOR, INC.
VOLTAGE-TO-FREQUENCY/
FREQUENCY-TO-VOLTAGE CONVERTERS
1
TC9400
TC9401
TC9402
ELECTRICAL CHARACTERISTICS: (Cont.) V
Full Scale = 10kHz, unless otherwise specified. TA = +25°C, unless temperature range is specified – 40°C to +85°C for
E device, 0°C to +70°C for C device.
FREQUENCY-TO-VOLTAGE TC9401 TC9400 TC9402
Parameter Definition Min Typ Max Min Typ Max Min Typ Max Unit
Supply Current
IDD Quiescent Current Required From Positive
(Note 5) Supply During Operation — 1.5 6 — 1.5 6 — 3 10 mA
ISS Quiescent Current Required From Negative
(Note 5) Supply During Operation — – 1.5 – 6 — – 1.5 – 6 – 3 – 10 mA
VDD Supply Operating Range of Positive Supply 4 — 7.5 4 — 7.5 4 — 7.5 V
VSS Supply Operating Range of Negative Supply – 4 — – 7.5 – 4 — – 7.5 – 4 — – 7.5 V
Reference Voltage
V
–V
REF
SS
Accuracy
Nonlinearity (Note 10) Deviation From Ideal Transfer — 0.01 0.02 — 0.02 0.05 — 0.05 0.25 % Full
Input Frequency Frequency Range for Specified 10 — 100k 10 — 100k 10 — 100k Hz
Range (Note 7 and 8) Nonlinearity
Frequency Input
Positive Excursion Voltage Required to Turn 0.4 — V
Negative Excursion Voltage Required to Turn – 0.4 – 2 – 0.4 — – 2 – 0.4 — – 2 V
Minimum Positive Time Between Threshold — 5 — — 5 — — 5 — µsec
Pulse Width (Note 8) Crossings
Minimum Negative Time Between Threshold — 0.5 — — 0.5 — — 0.5 µsec
Pulse Width (Note 8) Crossings
Input Impedance — 10 — — 10 — — 10 — MΩ
Analog Outputs
Output Voltage Voltage Range of Op Amp Output —
(Note 9) for Specified Nonlinearity
Output Loading Resistive Loading at Output of 2 — — 2 — — 2 — — kΩ
Supply Current
IDD Quiescent Current Required From Positive
(Note 10) Supply During Operation — 1.5 6 — 1.5 6 — 3 10 mA
ISS Quiescent Current Required From Negative
(Note 10) Supply During Operation — – 1.5 – 6 – 1.5 – 6 – 3 – 10 mA
VDD Supply Operating Range of Positive Supply 4 — 7.5 4 — 7.5 4 — 7.5 V
VSS Supply Operating Range of Negative Supply – 4 — – 7.5 – 4 — – 7.5 – 4 — – 7.5 V
Reference Voltage
V
–V
REF
SS
NOTES: 1. Full temperature range. Guaranteed, Not Tested.
2. IIN = 0.
3. Full temperature range, I
4. I
= 10µA.
OUT
5. Threshold Detect = 5V, Amp Out = 0V, Full Temperature
Range
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Range of Voltage Reference Input – 2.5 — — – 2.5 — — – 2.5 — — V
Function as a Percentage Scale
Full-Scale Voltage
Threshold Detector On
Threshold Detector Off
Op Amp
Range of Voltage Reference Input – 2.5 — — – 2.5 — — – 2.5 — — V
= 10mA.
OUT
= +5V, VSS = – 5V, V
DD
0.4 — V
DD
V
– 1
DD
6. 10Hz to 100kHz.; Guaranteed, Not Tested
7. 5µsec minimum positive pulse width and 0.5 µsec minimum
negative pulse width.
8. tR = tF = 20 nsec.
9. RL ≥ 2kΩ.; Tested @ 10kΩ
10.Full temperature range, VIN = – 0.1V.
——
GND
V
– 1
DD
= 0, V
REF
DD
——
= – 5V, R
0.4 — V
V
– 1
DD
= 100kΩ,
BIAS
DD
—V
V
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2
3
4
5
6
7
8
TC9400
TC9401
TC9402
PIN CONFIGURATIONS
14-Pin Plastic DIP/CerDIP 14-Pin SOIC (Narrow)
VOLTAGE-TO-FREQUENCY/
FREQUENCY-TO-VOLTAGE CONVERTERS
I
BIAS
ZERO ADJ
I
V
SS
V
OUT
REF
GND
V
REF
1
2
3
IN
TC9400
4
TC9401
TC9402
5
6
7
V
14
DD
13
NC
12
AMPLIFIER OUT
THRESHOLD DETECTOR
11
FREQ/2 OUT
10
9
OUTPUT COMMON
PULSE FREQ OUT
8
I
BIAS
ZERO ADJ
V
OUT
REF
GND
V
NC = NO INTERNAL CONNECTION
I
IN
V
SS
REF
1
2
3
4
5
6
7
TC9400
TC9401
TC9402
14
V
DD
13
NC
12
AMPLIFIER OUT
11
THRESHOLD DETECTOR
10
FREQ/2 OUT
9
OUTPUT COMMON
8
PULSE FREQ OUT
PIN DESCRIPTIONS
Pin No. Symbol Description
1I
BIAS
2 Zero Adj Low frequency adjustment input. See text.
3I
4V
5V
IN
SS
OUT Reference capacitor connection.
REF
6 GND Analog ground.
7V
REF
8 Pulse Freq Out Frequency output. This open drain output will pulse LOW each time the Freq
9 Output Common Source connection for the open drain output FETs. See text.
10 Freq/2 Out This open drain output is a square wave at one half the frequency of the pulse
11 Threshold Detect Input to the threshold detector. This pin is the frequency input during F/V operation.
12 Amplifier Out Output of the integrator amplifier.
13 NC No internal connection
14 V
DD
This pin sets bias current in the TC9400. Connect to VSS through a 100 kΩ resistor.
See text.
Input current connection for the V/F converter.
Negative power supply voltage connection, typically – 5V.
Voltage reference input, typically – 5V.
threshold detector limit is reached. The pulse rate is proportional to input voltage.
output (pin 8). Output transitions of this pin occur on the rising edge of pin 8.
Positive power supply connection, typically +5V.
3-290
TELCOM SEMICONDUCTOR, INC.
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