Microchip Technology TC9402EJD, TC9401EJD, TC9401CPD, TC9400CPD, TC9400COD Datasheet
TC9400/9401/9402
Voltage-to-Frequency/Frequency-to-Voltage Converters
Features
VOLTAGE-TO-FREQUENCY
• Choice of Linearity
- TC9401: 0.01%
- TC9400: 0.05%
- TC9402: 0.25%
• DC to 100kHz (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 100kHz
• Choice of 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
Device Selection Table
Part
Number
TC9400COD 0.05% 14-Pin SOIC
TC9400CPD 0.05% 14-Pin PDIP 0°C to +70°C
TC9400EJD 0.05% 14-Pin CerDIP -40°Cto +85°C
TC9401CPD 0.01% 14-Pin PDIP 0°C to +70°C
TC9401EJD 0.01% 14-Pin CerDIP -40°Cto +85°C
TC9402CPD 0.25% 14-Pin PDIP 0°C to +70°C
TC9402EJD 0.25% 14-Pin CerDIP °C to +85°C
Linearity
(V/F)
Package
(Narrow)
Temperature
Range
0°C to +70°C
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 generatean output pulse train, whose
frequency is linearly proportional to the input voltage.
Thedevicescanalsobeusedashighlyaccuratefrequency-to-voltage (F/V) converters, accepting virtually
any i nput frequency waveform and providing a linearly
proportional voltageoutput.
A complete V/F or F/V system only requires the addition of two capacitors, three resistors, and reference
voltage.
Package Type
14-Pin Plastic DIP/CERDIP
I
BIAS
ZERO ADJ
V
V
OUT
REF
GND
V
REF
I
BIAS
ZERO ADJ
I
V
SS
V
OUT
REF
GND
V
REF
1
2
I
IN
3
4
5
6
7
TC9400
TC9401
TC9402
SS
14-Pin SOIC
1
2
IN
3
TC9400
4
TC9401
TC9402
5
6
7
NC = No Internal Connection
V
14
DD
13
NC
AMPLIFIER OUT
12
THRESHOLD
11
DETECTOR
FREQ/2 OUT
10
9
OUTPUT COMMON
PULSE FREQ OUT
8
14
V
DD
13
NC
AMPLIFIER OUT
12
THRESHOLD
11
DETECTOR
FREQ/2 OUT
10
9
OUTPUT COMMON
8
PULSE FREQ OUT
2002 Microchip TechnologyInc. DS21483B-page 1
TC9400/9401/9402
g
Functional Block Diagram
Input
Voltage
Integrator
Capacitor
R
IN
I
IN
Reference
Capacitor
I
REF
Reference
Volta
e
Integrator
Op Amp
Threshold
Detector
TC9400
One
Shot
÷2
Pulse Output
Pulse/2 Output
DS21483B-page 2
2002 Microchip TechnologyInc.
TC9400/9401/9402
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
VDD–VSS...........................................................+18V
........................................................................10mA
I
IN
V
OUTMAX–VOUT
V
REF–VSS
Common......................................23V
..........................................................-1.5V
*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
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affectdevice reliability.
StorageTemperature Range..............-65°C to +150°C
Operating Temperature Range:
C Device ........................................... 0°C to +70°C
E Device.........................................-40°C to +85°C
Package Dissipation (T
≤ 70°C):
A
8-Pin CerDIP..............................................800mW
8-Pin Plastic DIP........................................730mW
8-Pin SOIC. ................................................470mW
TC940X ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VDD=+5V,VSS=-5V,V
specified. T
Parameter Min Typ Max Min Typ Max Min Typ Max Units Test Conditions
= +25°C, unless temperature rangeis specified (-40°C to +85°C for E device, 0°C to +70°CforC device).
A
Voltage-to-Frequency
GND
=0V,V
REF
=-5V,R
=100kΩ, Full Scale = 10kHz, unless otherwise
BIAS
Accuracy TC9400 TC9401 TC9402
Linearity 10kHz — 0.01 0.05 — 0.004 0.01 — 0.05 0.25 %
Linearity 100kHz — 0.1 0.25 — 0.04 0.08 — 0.25 0.5 %
GainTemperature
Drift (Note 1)
GainVariance — ±10 — — ±10 — — ±10 — % of
Zero Offset
(Note 2)
Zero Temperature
Drift (Note 1)
Note 1: Full temperature range; not tested.
2: I
=0.
IN
3: Full temperature range, I
4: I
OUT
5: ThresholdDetect = 5V, Amp Out = 0V, full temperature range.
6: 10Hz to 100kHz; not tested.
7: 5µsec minimum positivepulse width and 0.5µsec minimum negative pulse width.
8: t
R=tF
9: R
≥ 2kΩ, tested @ 10kΩ.
L
10: Full temperature range, V
— ±25 ±40 — ±25 ±40 — ±50 ±100 ppm/°C
— ±10 ±50 — ±10 ±50 — ±20 ±100 mV Correction at Zero
— ±25 ±50 — ±25 ±50 — ±50 ±100 µV/°C VariationinZeroOffset
=10mA.
=10µA.
=20nsec.
OUT
IN
= -0.1V.
Full Scale
Full Scale
Full Scale
Nominal
Output Deviation from
Straight Line Between
Normalized Zero and
FullScale Input
Output Deviation from
Straight Line Between
Normalized Zero Reading and Full Scale Input
VariationinGainAdue
to Temperature Change
Variation from Ideal
Accuracy
Adjustfor ZeroOutput
whenInputis Zero
DuetoTemperature
Change
2002 Microchip TechnologyInc. DS21483B-page 3
TC9400/9401/9402
TC940X ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: VDD=+5V,VSS=-5V,V
specified. T
= +25°C, unless temperature rangeis specified (-40°C to +85°C for E device, 0°C to +70°CforC device).
A
Parameter Min Typ Max Min Typ Max Min Typ Max Units Test Conditions
Analog Input
I
Full Scale — 10 — — 10 — — 10 — µA Full Scale Analog Input
IN
Over Range — — 50 — — 50 — — 50 µA Over RangeCurrent
I
IN
Response Time — 2 — — 2 — — 2 — Cycle Settling Time to 0.1%
Digital Section TC9400 TC9401 TC9402
V
SAT@IOL
V
OUTMAX–VOUT
Common (Note 4)
PulseFrequency
= 10mA — 0.2 0.4 — 0.2 0.4 — 0.2 0.4 V Logic "0" Output
— — 18 — — 18 — — 18 V VoltageRange
—3——3——3 —µsec
OutputWidth
Frequency-to-Voltage
GND
=0V,V
REF
=-5V,R
=100kΩ, Full Scale = 10kHz, unless otherwise
BIAS
Current to achieve
Specified Accuracy
Full Scale
Voltage (Note 3)
Between Output and
Common
Supply Current
Quiescent
I
DD
(Note 5)
— 1.5 6 — 1.5 6 — 3 10 mA Current Required from
Positive Supply during
Operation
Quiescent
I
SS
(Note 5)
— -1.5 -6 — -1.5 -6 — -3 -10 mA Current Required from
Negative Supplyduring
Operation
Supply 4 — 7.5 4 — 7.5 4 — 7.5 V Operating Range of
V
DD
Supply -4 — -7.5 -4 — -7.5 -4 — -7.5 V Operating Range of
V
SS
Positive Supply
Negative Supply
Reference Voltage
V
REF–VSS
-2.5 — — -2.5 — — -2.5 — — V Range of Voltage
Reference Input
Accuracy
Non-Linearity
(Note 10)
— 0.02 0.05 — 0.01 0.02 — 0.05 0.25 %
Full Scale
Deviation from ideal
Transfer Function as a
Percentage Full Scale
Voltage
InputFrequency
Range
10 — 100k 10 — 100k 10 — 100k Hz Frequency Range for
Specified Non-Linearity
(Notes 7 and 8)
Note 1: Full temperature range; not tested.
=0.
2: I
IN
3: Full temperature range, I
4: I
5: ThresholdDetect = 5V, Amp Out = 0V, full temperature range.
OUT
=10µA.
OUT
=10mA.
6: 10Hz to 100kHz; not tested.
7: 5µsec minimum positivepulse width and 0.5µsec minimum negative pulse width.
8: t
9: R
10: Full temperature range, V
=20nsec.
R=tF
≥ 2kΩ, tested @ 10kΩ.
L
= -0.1V.
IN
DS21483B-page 4
2002 Microchip TechnologyInc.
TC9400/9401/9402
TC940X ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: VDD=+5V,VSS=-5V,V
specified. T
= +25°C, unless temperature rangeis specified (-40°C to +85°C for E device, 0°C to +70°CforC device).
A
Parameter Min Typ Max Min Typ Max Min Typ Max Units Test Conditions
Frequency Input
Positive Excursion 0.4 — V
0.4 — V
DD
Negative Excursion -0.4 -2 -0.4 — -2 -0.4 — -2 V VoltageRequired to
MinimumPositive
—5——5——5 —µsec Time between
Pulse Width
(Note 8)
MinimumNegative
— 0.5 — — 0.5 — — 0.5 — µsec Time Between
Pulse Width
(Note 8)
Input Impedance — 10 — — 10 — — 10 MΩ
Analog Outputs TC9400 TC9401 TC9402
OutputVoltage
(Note 9)
—V
DD
–1 — — VDD–1 — — VDD– 1 — V Voltage Range of Op
OutputLoading 2 — — 2 — — 2 — — kΩ Resistive Loadingat
Supply Current TC9400 TC9401 TC9402
Quiescent
I
DD
(Note 10)
I
Quiescent
SS
— 1.5 6 — 1.5 6 — 3 10 mA Current Requiredfrom
— -1.5 -6 -1.5 -6 — -3 -10 mA Current Required from
(Note 10)
Supply 4 — 7.5 4 — 7.5 4 — 7.5 V Operating Range of
V
DD
Supply -4 — -7.5 -4 — -7.5 -4 — -7.5 V Operating Range of
V
SS
Reference Voltage
V
REF–VSS
-2.5 — — -2.5 — — -2.5 — — V Range of Voltage
Note 1: Full temperature range; not tested.
=0.
2: I
IN
3: Full temperature range, I
4: I
OUT
=10µA.
OUT
=10mA.
5: ThresholdDetect = 5V, Amp Out = 0V, full temperature range.
6: 10Hz to 100kHz; not tested.
7: 5µsec minimum positivepulse width and 0.5µsec minimum negative pulse width.
8: t
9: R
10: Full temperature range, V
=20nsec.
R=tF
≥ 2kΩ, tested @ 10kΩ.
L
= -0.1V.
IN
GND
=0V,V
=-5V,R
REF
0.4 — V
DD
=100kΩ, Full Scale = 10kHz, unless otherwise
BIAS
DD
V VoltageRequired to
Turn Threshold
Detector On
Turn Threshold
Detector Off
Threshold Crossings
Threshold Crossings
Amp Outputfor Specified Non-Linearity
Output of Op Amp
Positive Supply During
Operation
Negative Supply
During Operation
Positive Supply
Negative Supply
Reference Input
2002 Microchip TechnologyInc. DS21483B-page 5
TC9400/9401/9402
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN F UNCTION TABLE
Pin No.
14-Pin PDIP/CERDIP
14-Pin SOIC (Narrow)
1I
2 ZERO ADJ Low f requency adjustment input.
3I
4V
5V
6 GND Analog ground.
7V
8 PULSE FREQ
9OUTPUT
10 FREQ/2 OUT This open drain output is a square wave at one-half the frequency of the pulse output
11 THRESHOLD
12 AMPLIFIEROUT Output of the integrator amplifier.
13 NC No internal connection.
14 V
Symbol Description
BIAS
IN
SS
OUT Reference capacitor connection.
REF
REF
OUT
COMMON
DETECTOR
DD
This pin sets bias current in the TC9400. Connect to VSSthrougha 100kΩ resistor.
Inputcurrent connectionfor theV/F converter.
Negative power supply voltage connection, typically -5V.
Voltage reference input, typically -5V.
Frequency output. This opendrain output will pulse LOW each timetheFreq.
Threshold Detectorlimitis reached. The pulse rate is proportional to input voltage.
Sourceconnection for the open drain output FETs.
(Pin 8). Output transitions of this pin occur on the rising edge of Pin8.
Inputto the ThresholdDetector.This pin is the frequency input duringF/V operation.
Positive power supply connection, typically +5V.
DS21483B-page 6
2002 Microchip TechnologyInc.
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