Wavelength Electronics WTC3293, Datasheet And Operating Manual

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WTC3243 TEMPERATURE CONTROLLER
PIN DESCRIPTIONS — WTC3243
Table 1. WTC3243 Temperature Controller Pin Descriptions
PIN NAME PIN DESCRIPTION
1 VDD
Control Electronics Power Supply Input. Connect a +4.5 V to +30 V power supply to VDD (Pin 1)
and GND (Pin 13). NOTE: can be connected to VS (Pin 14).
2 VSET
Voltage Setpoint [Setpoint voltage equations are sensor dependent & noted on operating diagrams].
Connect a voltage source between VSET (Pin 2) and GND (Pin 13) to control the temperature setting.
3 LIMA
Limit A . A resistor connected between LIMA (Pin 3) and GND (Pin 13) limits the output current drawn
off the VS (Pin 14) supply input to OUTA (Pin 11).
4 LIMB
Limit B . A resistor connected between LIMB (Pin 4) and GND (Pin 13) limits the output current drawn
off the VS (Pin 14) supply input to OUTB (Pin 12).
5 P
Proportional Gain Resistor Connection . Connect a resistor between P (Pin 5) and +1V (Pin 6) to
configure the Proportional Gain setting.
6 +1V +1 Volt Reference .
7 I
Integrator Time Constant Resistor Connection . Connect a resistor between I (Pin 7) and +1V
(Pin 6) to configure the Integrator Time Constant setting.
8 SG
Sensor Gain Resistor Connection . Connect a resistor between SG (Pin 8) and GND (Pin 13) to
adjust the Sensor Gain setting.
9 S+
Sensor Connection . Connect resistive and LM335 type temperature sensors across S+ (Pin 9) and
GND (Pin 13). Connect a 10 kΩ resistor across S+ (Pin 9) and GND (Pin 13) when using AD590
type temperature sensors. The negative terminal of the AD590 sensor connects to S+ (Pin 9) and the
positive terminal to VDD (Pin 1). AD590 operation requires that VDD be +8 V or greater.
10 BIAS
Sensor Bias Current Resistor Connection
. Connect a resistor between BIAS (Pin 10) and VDD
(Pin 1) to configure the sensor bias current.
11 OUTA
Thermoelectric Output A
. Connect OUTA (Pin 11) to the negative terminal on your thermoelectric
when controlling temperature with Negative Temperature Coefficient (NTC) thermistors. With NTC
sensors the TEC current will flow from OUTA to OUTB (Pin 12) when heating (opposite polarity
for PTC sensors). Connect OUTA (Pin 11) to the positive thermoelectric terminal when using
Positive Temperature Coefficient (PTC) RTDs, LM335 type, and AD590 type temperature sensors.
12 OUTB
Thermoelectric Output B . Connect OUTB (Pin 12) to the positive terminal on your thermoelectric
when controlling temperature with Negative Temperature Coefficient (NTC) thermistors. With NTC
sensors the TEC current will flow from OUTB to OUTA (Pin 11) when cooling (opposite polarity
for PTC sensors). Connect OUTB (Pin 12) to the negative thermoelectric terminal when using
Positive Temperature Coefficient (PTC) RTDs, LM335 type, and AD590 type temperature sensors.
13 GND
Ground . Connect the power supply ground connections to GND (Pin 13). All ground connections to
this pin should be wired separately.
14 VS
Power Drive Supply Input . Provides power to the WTC3243 H-Bridge power stage. Supply range
input for this pin is +3 to +30 Volts DC. The maximum current drain on this terminal should not
exceed 2.2 A. CAUTION: Care should be taken to observe the maximum internal power dissipation
limits before applying power to the device. NOTE: can be connected to VDD (Pin 1).
IF YOU ARE UPGRADING FROM THE WHY5640: The position of Pin 1 on the WHY5640 is reversed (or mirrored) relative
to the position of Pin 1 on the WTC3243.