AD590LH Analog Devices Inc, AD590LH Datasheet - Page 12

• Manufacturer Part Number: AD590LH
• Description: IC TEMP TRANSDUCER 2-TERM TO52-3
• Manufacturer: Analog Devices Inc

Specifications of AD590LH

• Sensing Temperature: -55°C ~ 150°C
• Output Type: Current
• Voltage - Supply: 4 V ~ 30 V
• Accuracy: ±1°C
• Package / Case: TO-52-3, Metal Can
• Ic Output Type: Current
• Sensing Accuracy Range: ± 1°C
• Supply Voltage Range: 4V To 30V
• Sensor Case Style: TO-52
• No. Of Pins: 3
• Termination Type: Through Hole
• Mounting Type: Through Hole
• Body Style: TO-52
• Current, Supply: 298.2 μA (Typ.) @ 25 °C
• Current, Switching: 298.2 μA
• Function: Temperature
• Linearity: ± 0.3 °C
• Output: Current
• Primary Type: Temperature
• Range, Measurement: 150 °C
• Temperature Coefficient: 1 μA⁄K (Typ.)
• Temperature, Operating, Maximum: 150 °C
• Temperature, Operating, Minimum: -55 °C
• Temperature, Soldering: 300 °C
• Termination: 3-Wire Connector
• Voltage, Forward: 44 V
• Voltage, Output: 4 V (Min.)
• Voltage, Reverse: -20 V
• Voltage, Supply: 30 V
• 2-terminal Device: voltage in⁄current out
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD590
CMOS analog multiplexers can also be used to switch AD590
current. Due to the AD590’s current mode, the resistance of
such switches is unimportant as long as 4 V is maintained
across the transducer. Figure 24 shows a circuit that combines
the principle demonstrated in Figure 23 with an 8-channel
CMOS multiplexer. The resulting circuit can select 1 to 80
sensors over only 18 wires with a 7-bit binary word.
SELECT
COLUMN
SELECT
ROW
AD581
INHIBIT
+
–
+15V
V
11
12
13
10
OUT
9
10
11
6
DECODER
DECIMAL
35.7kΩ
35.7kΩ
BCD-TO-
CMOS
INTERFACE
4028
10V
10V
AD590L
16
16
8
LEVEL
LOGIC
7
2kΩ
2kΩ
8
–5V TO –15V
14
3
2
+
–
Figure 25. 8-Channel Multiplexer
Figure 24. Matrix Multiplexer
0
1
2
+
–
+15V
–15V
AD590L
Rev. E | Page 12 of 16
BINARY TO 1-OF-8 DECODER
S1
S2
S8
+
–
5kΩ
5kΩ
22
AD7501
+
–
97.6kΩ
97.6kΩ
TTL/DTL TO CMOS
12
+
–
INTERFACE
EN
02
The inhibit input on the multiplexer turns all sensors off for
minimum dissipation while idling.
Figure 25 demonstrates a method of multiplexing the AD590 in
the 2-trim mode (see Figure 12 and Figure 13). Additional AD590s
and their associated resistors can be added to multiplex up to
eight channels of ±0.5°C absolute accuracy over the temperature
range of −55°C to +125°C. The high temperature restriction of
125°C is due to the output range of the op amps; output to 150°C
can be achieved by using a 20 V supply for the op amp.
DECODER/
+
–
DRIVER
CHANNEL
SELECT
BINARY
21
2
15
+
–
1
14
11
+
–
0
13
01
27kΩ
+
–
10kΩ
AD707A
20
–15V
+
–
4051 CMOS ANALOG
MULTIPLEXER
V+
10mV/°C
10
+
–
00
AD590
10mV/°C