© 2022
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WTC32ND TEMPERATURE CONTROLLER
ELECTRICAL SPECIFICATIONS — WTC32ND
ABSOLUTE MAXIMUM RATINGS
SYMBOL
WTC32ND
WTC32ND-HB
UNIT
NOTE
Supply Voltage 1
V
DD
+4.5 to +30
+3 to +5.5
Volts DC
Voltage on Pin 1
Can be connected to V
S
Consult SOA Calculator
Supply Voltage 2
V
S
+3 to +30
+3 to +8
Volts DC
Voltage on Pin 14
Can be connected to V
DD
Consult SOA Calculator
Power Dissipation
P
MAX
9
Watts
T
AMBIENT
= +25ºC
See SOA Chart -- with fan
and heatsink
Case Operating Temperature
T
OPR
-40 to +85
ºC
Case Storage Temperature
T
STG
-65 to 150
ºC
PARAMETER
SYMBOL
WTC32ND
WTC32ND-HB
UNIT
NOTE
OUTPUT CURRENT
Maximum Output Current
I
OUT
±2.0 to ±2.2
±2.2
Amps
Compliance Voltage, OUTA to OUTB
V
S
- 0.1
Volts
Full temp. range,
I
OUT
= 100 mA
Compliance Voltage, OUTA to OUTB
V
S
- 0.3
Volts
Full temp. range,
I
OUT
= 1 A
Compliance Voltage, OUTA to OUTB
V
S
- 0.6
Volts
Full temp. range,
I
OUT
= 1.5 A
Compliance Voltage, OUTA to OUTB
V
S
- 0.9
Volts
Full temp. range,
I
OUT
= 2.0 A
Compliance Voltage, Resistive Heater
V
S
- 1.0
Volts
Full temp. range,
I
OUT
= 2.2 A
Short Term Stability (1 hour)
0.0009
ºC
OFF ambient temperature
TSET = 25ºC using 10 kΩ
thermistor
(1)
Short Term Stability (1 hour)
0.002
ºC
ON ambient temperature
TSET = 25ºC using 10 kΩ
thermistor
(1)
Long Term Stability (24 hours)
0.002
ºC
OFF ambient temperature
TSET = 25ºC using 10 kΩ
thermistor
(1)
POWER SUPPLY
Power Supply Voltage
V
DD
= +4.5 to +30
V
S
= +3 to +30
V
DD
= +3 to +5.5
V
S
= +3 to +8
Volts
Quiescent Current
V
DD-QUIESCENT
= 8
V
S-QUIESCENT
= 2.5
mA
Minimum Current Rating
V
DD
= 1.1 * V
DD-QUIESCENT
V
S
= 1.1 *(I
TEC
+ V
S-QUIESCENT
)
Amps
TEMPERATURE SENSORS
Sensor Compatibility
Thermistors, RTD, IC Sensors
Sensor Input Voltage Range
GND to V
DD
- 2
Volts
Limited by bias current
circuit
(2)
Sensor Input Damage Threshold
> V
DD
+ 0.7 or < -0.7
Volts
Without the bias current
circuit
(1)
When using resistive heaters, stability can only be consistently achieved when specified temperatures are 10°C or more above ambient.
(2)
The bias source has a compliance up to V
DD
- 2 V. In normal operation this limits the sensor voltage range from 0 V to V
DD
- 2 V. While
voltages up to ±5 V outside this range on the VSET pin will not damage the unit, it will not provide proper control under these conditions.