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| 型号： | AD595CQ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/8页 |
| 文件大小： | 136K |
| 描述： | IC THERMOCOUPLE A W/COMP 14CDIP |
| 标准包装： | 25 |
| 功能： | 热电偶放大器 |
| 传感器类型： | 外部 |
| 精确度： | ±1°C（最小值） |
| 拓扑： | 冰点补偿，过载检测 |
| 输出类型： | 电压 |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 5 V ~ ±15 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 14-CDIP（0.300"，7.62mm） |
| 供应商设备封装： | 14-CDIP |
| 包装： | 管件 |
| 产品目录页面： | 797 (CN2011-ZH PDF) |
FUNCTIONAL BLOCK DIAGRAM
14
13
12
11
10
9
8
OVERLOAD
DETECT
ICE
POINT
COMP.
+A
G
G
TC
+TC
1
2
3
4
5
6
7
AD594/AD595
+IN
+C
+T
COM
T
C
V
IN
ALM +ALM
V+
COMP
VO
FB
a
Monolithic Thermocouple Amplifiers
with Cold Junction Compensation
AD594/AD595
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: +5 V to 15 V
Low Power: <1 mW typical
Thermocouple Failure Alarm
Laser Wafer Trimmed to 1C Calibration Accuracy
Setpoint Mode Operation
Self-Contained Celsius Thermometer Operation
High Impedance Differential Input
Side-Brazed DIP or Low Cost Cerdip
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/癈) 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癈 can be measured. To minimize self-heating, an
unloaded AD594/AD595 will typically operate with a total sup-
ply current 160 礎, but is also capable of delivering in excess of
? mA to a load.
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
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 ?癈 and
?癈, respectively. Both are designed to be used from 0癈 to
+50癈, 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,
amplification, and an output buffer in a single IC package.
2. Compensation, zero, and scale factor are all precalibrated by
laser wafer trimming (LWT) of each IC chip.
3. Flexible pinout provides for operation as a setpoint control-
ler or a stand-alone temperature transducer calibrated in
degrees Celsius.
4. Operation at remote application sites is facilitated by low
quiescent current and a wide supply voltage range +5 V to
dual supplies spanning 30 V.
5. Differential input rejects common-mode noise voltage on the
thermocouple leads.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
?Analog Devices, Inc., 1999
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