AD595CQ Analog Devices Inc, AD595CQ Datasheet
AD595CQ
Manufacturer Part Number
AD595CQ
Description
IC THERMOCOUPLE A W/COMP 14CDIP
Manufacturer
Analog Devices Inc
Type
Low Powerr
Specifications of AD595CQ
Rohs Status
RoHS non-compliant
Function
Thermocouple Amplifier
Topology
Ice Point Compensation, Overload Detection
Sensor Type
External
Output Type
Voltage
Output Alarm
Yes
Output Fan
No
Voltage - Supply
5 V ~ ±15 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Through Hole
Package / Case
14-CDIP (0.300", 7.62mm)
Ic Output Type
Voltage
Sensing Accuracy Range
± 1°C
Supply Current
160µA
Supply Voltage Range
5V To 30V
Sensor Case Style
DIP
No. Of Pins
14
Termination Type
DIP
Amplifier Type
Instrumentation
Bandwidth
15 kHz
Converter Type
Monolithic theremocouple amplifier
Current, Input Bias
0.1 μA
Current, Output
±5 mA
Current, Quiescent Supply
160 uA (Typ.) @ 25 °C
Current, Supply
160 μA
Package Type
CDIP-14
Temperature, Operating, Maximum
125 °C
Temperature, Operating, Minimum
-55 °C
Temperature, Operating, Range
-55 to +125 °C
Voltage, Supply
+5 to ±15 V
Low Impedance Voltage Output
10 mV⁄°C
Wide Power Supply Range
+ 5 V to 615 V
Low Power
1 mW typical
Filter Terminals
DIP
Rohs Compliant
No
Accuracy
± 1
Accuracy %
1%
Sensing Temperature
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD595CQ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD595CQZ
Manufacturer:
AMI
Quantity:
6 242
a
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
PRODUCT DESCRIPTION
The AD594/AD595 is a complete instrumentation amplifier and
thermocouple cold junction compensator on a monolithic chip.
It combines an ice point reference with a precalibrated amplifier
to produce a high level (10 mV/ C) output directly from a ther-
mocouple signal. Pin-strapping options allow it to be used as a
linear amplifier-compensator or as a switched output setpoint
controller using either fixed or remote setpoint control. It can
be used to amplify its compensation voltage directly, thereby
converting it to a stand-alone Celsius transducer with a low
impedance voltage output.
The AD594/AD595 includes a thermocouple failure alarm that
indicates if one or both thermocouple leads become open. The
alarm output has a flexible format which includes TTL drive
capability.
The AD594/AD595 can be powered from a single ended supply
(including +5 V) and by including a negative supply, tempera-
tures below 0 C can be measured. To minimize self-heating, an
unloaded AD594/AD595 will typically operate with a total sup-
ply current 160 A, but is also capable of delivering in excess of
The AD594 is precalibrated by laser wafer trimming to match
the characteristic of type J (iron-constantan) thermocouples and
the AD595 is laser trimmed for type K (chromel-alumel) inputs.
The temperature transducer voltages and gain control resistors
5 mA to a load.
FEATURES
Pretrimmed for Type J (AD594) or
Can Be Used with Type T Thermocouple Inputs
Low Impedance Voltage Output: 10 mV/ C
Built-In Ice Point Compensation
Wide Power Supply Range: +5 V to
Low Power: <1 mW typical
Thermocouple Failure Alarm
Laser Wafer Trimmed to 1 C Calibration Accuracy
Setpoint Mode Operation
Self-Contained Celsius Thermometer Operation
High Impedance Differential Input
Side-Brazed DIP or Low Cost Cerdip
Type K (AD595) Thermocouples
15 V
Monolithic Thermocouple Amplifiers
with Cold Junction Compensation
are available at the package pins so that the circuit can be
recalibrated for the thermocouple types by the addition of two
or three resistors. These terminals also allow more precise cali-
bration for both thermocouple and thermometer applications.
The AD594/AD595 is available in two performance grades. The
C and the A versions have calibration accuracies of 1 C and
+50 C, and are available in 14-pin, hermetically sealed, side-
brazed ceramic DIPs as well as low cost cerdip packages.
PRODUCT HIGHLIGHTS
1. The AD594/AD595 provides cold junction compensation,
2. Compensation, zero, and scale factor are all precalibrated by
3. Flexible pinout provides for operation as a setpoint control-
4. Operation at remote application sites is facilitated by low
5. Differential input rejects common-mode noise voltage on the
3 C, respectively. Both are designed to be used from 0 C to
amplification, and an output buffer in a single IC package.
laser wafer trimming (LWT) of each IC chip.
ler or a stand-alone temperature transducer calibrated in
degrees Celsius.
quiescent current and a wide supply voltage range +5 V to
dual supplies spanning 30 V.
thermocouple leads.
+IN
–IN
14
1
FUNCTIONAL BLOCK DIAGRAM
AD594/AD595
G
–ALM
13
+C
2
+ALM
12
+T
3
G
COM
V+
OVERLOAD
DETECT
11
4
AD594/AD595
COMP
+A
10
–T
5
+TC
VO
–C
9
6
COMP.
POINT
ICE
FB
V–
8
7
–TC
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AD595CQ Summary of contents
Page 1
FEATURES Pretrimmed for Type J (AD594) or Type K (AD595) Thermocouples Can Be Used with Type T Thermocouple Inputs Low Impedance Voltage Output: 10 mV/ C Built-In Ice Point Compensation Wide Power Supply Range Low Power: ...
Page 2
... – 0.3 0 – – – – – – 160 300 160 300 100 100 AD595AD AD595CD AD595AQ AD595CQ 193 Units Volts Volts Volts Volts Volts mV Volts mV/V mV/V Volts Volts mA kHz Volts A max Volts mA Volts Volts REV. C ...
Page 3
Table I. Output Voltage vs. Thermocouple Temperature (Ambient + Thermocouple Type J AD594 Temperature Voltage Output –200 –7.890 –1523 –180 –7.402 –1428 –160 –6.821 –1316 –140 –6.159 –1188 –120 –5.426 –1046 –100 –4.632 –893 –80 ...
Page 4
AD594/AD595 THERMOCOUPLE BASICS Thermocouples are economical and rugged; they have reason- ably good long-term stability. Because of their small size, they respond quickly and are good choices where fast response is im- portant. They function over temperature ranges from cryogenics ...