DN1220 Просмотр технического описания (PDF) - Unspecified
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DN1220 Datasheet PDF : 9 Pages
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DN1220
DN1220 Pin Designations
PIN
NAME
1
SIG GND
2
INPUT
3
VR
4
RG
5 IN MONITOR
6
RTC
7
INT OUT
8
RCL1
9
VR/2
10
RCL2
11 PWR GND
12
VS
13
TEC +
14
TEC -
DESCRIPTION
Ground for the reference voltages and the input signal
Input signal from the temperature sensing bridge
3.0 volt reference for the temperature sensing bridge
A resistor between Pin 4 and Pin 5 that sets the proportional gain of the controller
Buffered input voltage; also, the input signal to the proportional gain and the integrator stages
A resistor between Pin 5 and Pin 6 that sets the integrator time constant
Integrator output
A resistor RCL1 between Pin 8 and Pin 9 limiting the maximum heating current
1.5 volt reference serving as the internal reference for the control electronics.
A resistor RCL2 between Pin 9 and Pin 10 limiting the maximum cooling current
Ground return for the power supply.
Positive power supply voltage
Positive input into the TEC
Negative input into the TEC
Electrical Specifications
PARAMETER
SYMBOL
CONDITIONS
Compliance Voltage 1
VC
VS = +12 VDC ITEC = ±2 amperes
VC
VS = +5 VDC ITEC = ±1 amperes
Current Drive Capability
Current Limiting Range 2
ISMAX
ICL
VS = +12 VDC TEC Resistance < 4Ω
VS = +12 VDC TEC resistance < 4Ω
Voltage Reference 3
Voltage Reference 3
VR
VR/2
VS = +5 to +12 VDC
VS = +5 to +12 VDC
Voltage Reference Drift
TCVR VS = +5 to +12 VDC
Quiescent Current (ITEC = 0)
Maximum Power Dissipation4
ISQ
PMAX
VS = +12 VDC
VS = +5 to +12 VDC
Operating Temperature Range
T
VS = +5 to +12 VDC
MIN
±8
±2
±2
0
2.940
1.470
-20
TYP
3.000
1.500
MAX UNITS
V
V
A
±2
A
3.060 V
1.530 V
± 100 ppm/°C
100 mA
10 Watts
75
°C
1. Compliance voltage is the maximum voltage that can be supplied to the load and is dependent on the power supply
voltage. Maximum compliance of ±8 volts is specified for a supply voltage of +12 V and ±2 volts for a power supply
voltage of +5 V.
2. There are independent maximum current adjustments for both heating and cooling cycles.
3. VR can supply a maximum of 1.5 mA and VR/2 can supply up to 100µA of current.
4. The DN1220 must be attached to a heat sink with a thermal compound such as Dow Corning 340 to keep the
temperature of the device below 75°C.
Page 2
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