AD594ADZ

更新时间： 2024-02-25 12:31:40

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器放大器电路 PC
页数	文件大小	规格书
8页	131K
描述
Monolithic Thermocouple Amplifiers with Cold Junction Compensation

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AD594ADZ 技术参数

Source Url Status Check Date：	2013-05-01 14:56:15.076	是否无铅：	含铅
是否Rohs认证：	不符合	生命周期：	Active
零件包装代码：	DIP	包装说明：	CERDIP-14
针数：	14	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.31.00.01
风险等级：	7.24	放大器类型：	INSTRUMENTATION AMPLIFIER
最大平均偏置电流 (IIB)：	0.1 µA	标称带宽 (3dB)：	0.015 MHz
JESD-30 代码：	R-GDIP-T14	JESD-609代码：	e0
长度：	19.55 mm	功能数量：	1
端子数量：	14	最高工作温度：	125 °C
最低工作温度：	-55 °C	封装主体材料：	CERAMIC, GLASS-SEALED
封装代码：	DIP	封装等效代码：	DIP14,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT APPLICABLE	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	5.283 mm
子类别：	Instrumentation Amplifier	最大压摆率：	0.3 mA
供电电压上限：	36 V	标称供电电压 (Vsup)：	5 V
表面贴装：	NO	技术：	BIPOLAR
温度等级：	MILITARY	端子面层：	Tin/Lead (Sn63Pb37)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT APPLICABLE
宽度：	7.62 mm	Base Number Matches：	1

AD594ADZ 数据手册

AD594/AD595

THERMOCOUPLE BASICS

and to arrange its output voltage so that it corresponds to a ther-

mocouple referred to 0°C. This voltage is simply added to the

thermocouple voltage and the sum then corresponds to the stan-

dard voltage tabulated for an ice-point referenced thermocouple.

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

to jet-engine exhaust and have reasonable linearity and accuracy.

V ' = V

1 1

FOR PROPERLY

SCALED V = f(T )

V1'

Because the number of free electrons in a piece of metal de-

pends on both temperature and composition of the metal, two

pieces of dissimilar metal in isothermal and contact will exhibit

a potential difference that is a repeatable function of tempera-

ture, as shown in Figure 14. The resulting voltage depends on

the temperatures, T1 and T2, in a repeatable way.

CuNi–

CONSTANTAN

V3'

IRON

CONSTANTAN

Figure 15. Substitution of Measured Reference

Temperature for Ice Point Reference

CONSTANTAN

The temperature sensitivity of silicon integrated circuit transis-

tors is quite predictable and repeatable. This sensitivity is

exploited in the AD594/AD595 to produce a temperature re-

lated voltage to compensate the reference of “cold” junction of a

thermocouple as shown in Figure 16.

IRON

ICE POINT

REFERENCE

UNKNOWN

TEMPERATURE

Figure 14. Thermocouple Voltage with 0°C Reference

Since the thermocouple is basically a differential rather than

absolute measuring device, a know reference temperature is

required for one of the junctions if the temperature of the other

is to be inferred from the output voltage. Thermocouples made

of specially selected materials have been exhaustively character-

ized in terms of voltage versus temperature compared to primary

temperature standards. Most notably the water-ice point of 0°C

is used for tables of standard thermocouple performance.

CONSTANTAN

An alternative measurement technique, illustrated in Figure 15,

is used in most practical applications where accuracy requirements

do not warrant maintenance of primary standards. The reference

junction temperature is allowed to change with the environment

of the measurement system, but it is carefully measured by some

type of absolute thermometer. A measurement of the thermo-

couple voltage combined with a knowledge of the reference

temperature can be used to calculate the measurement junction

temperature. Usual practice, however, is to use a convenient

thermoelectric method to measure the reference temperature

IRON

Figure 16. Connecting Isothermal Junctions

Since the compensation is at the reference junction temperature,

it is often convenient to form the reference “junction” by connect-

ing directly to the circuit wiring. So long as these connections

and the compensation are at the same temperature no error will

result.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

TO-116 (D) Package

Cerdip (Q) Package

0.77 ±0.015

(19.55 ±0.39)

0.430 (10.92)

0.040

0.290 ±0.010

(7.37 ±0.25)

0.265

(6.73)

(1.02) R

0.310

(7.87)

0.260 ±0.020

(6.6 ±0.51)

0.300 (7.62)

REF

PIN 1

0.31 ±0.01

(7.87 ±0.25)

PIN 1

0.035 ±0.010

0.700 ±0.010

(17.78 ±0.25)

(0.889 ±0.254)

0.148 ±0.015

(3.76 ±0.38)

0.035 ±0.010

(0.89 ±0.25)

0.095 (2.41)

0.085 (2.16)

0.180 ±0.030

(4.57 ±0.76)

0.125

3.175)

MIN

0.180 ±0.030

(4.57 ±0.76)

0.125

(3.18)

MIN

0.01 ±0.002

(0.25 ±0.05)

0.010 ±0.001

(0.254 ±0.025)

SEATING

PLANE

0.018

(0.457)

15°

0°

0.032

(0.812)

0.047 ±0.007

(1.19 ±0.18)

0.100

(2.54)

BSC

0.100

(2.54)

BSC

+0.003

0.017

0.30 (7.62) REF

–0.002

0.600 (15.24)

BSC

+0.08

0.43

(

–0.05

–8–

REV. C

1...5 6 78

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与AD594ADZ相关器件

型号	品牌	描述	获取价格	数据表
AD594AQ	ADI	Monolithic Thermocouple Amplifiers with Cold Junction Compensation	获取价格
AD594C	ADI	Monolithic Thermocouple Amplifiers with Cold Junction Compensation	获取价格
AD594CD	ADI	Monolithic Thermocouple Amplifiers with Cold Junction Compensation	获取价格
AD594CD/+	ETC	Thermocouple Amplifier	获取价格
AD594CDZ	ADI	Monolithic Thermocouple Amplifiers with Cold Junction Compensation	获取价格
AD594CQ	ADI	Monolithic Thermocouple Amplifiers with Cold Junction Compensation	获取价格

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