AD694JN

更新时间： 2024-02-12 01:18:38

品牌	Logo	应用领域
亚德诺 - ADI		模拟IC 信号电路光电二极管
页数	文件大小	规格书
12页	428K
描述
4.20 mA Transmitter

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AD694JN 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	DIP
包装说明：	DIP,	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	0.64
Samacsys Confidence：	3	Samacsys Status：	Released
Samacsys PartID：	169175	Samacsys Pin Count：	16
Samacsys Part Category：	Integrated Circuit	Samacsys Package Category：	Dual-In-Line Packages
Samacsys Footprint Name：	N-16	Samacsys Released Date：	2015-06-25 00:00:00
Is Samacsys：	N	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-PDIP-T16	JESD-609代码：	e3
长度：	20.13 mm	功能数量：	1
端子数量：	16	最高工作温度：	70 °C
最低工作温度：		封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT APPLICABLE
认证状态：	Not Qualified	座面最大高度：	5.33 mm
最大供电电压 (Vsup)：	36 V	最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	24 V	表面贴装：	NO
温度等级：	COMMERCIAL	端子面层：	Matte Tin (Sn)
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

AD694JN 数据手册

AD694

FUNCTIONAL DESCRIPTION

The operation of the AD694 can best be understood by dividing

the circuit into three functional parts (see Figure 1). First, a

single supply input amplifier buffers the high level, single-ended

input signal. The buffer amplifier drives the second section, a

voltage to current (V/I) converter, that makes a 0 to 16 mA sig-

nal dependent current.

Typical Minimum Supply Voltage vs. Temperature for 2 V

& 10 V Full Scale

Figure 1. Functional Block Diagram

The third section, a voltage reference and offset generator, is re-

sponsible for providing the 4 mA offset current signal.

BUFFER AMPLIFIER

The buffer amplifier is a single supply amplifier that may be

used as a unity gain buffer, an output amplifier for a current

output D/A converter, or as a gain block to amplify low level

signals. The amplifier’s PNP input stage has a common-mode

range that extends from a few hundred mV below ground to

within 2.5 V of V_S. The Class A output of the amplifier appears

at Pin 1 (FB). The output range extends from about 1 mV

above common to within 2.5 V of V_Swhen the amplifier is oper-

ated as a follower. The amplifier can source a maximum load of

5 kΩ, but can sink only as much as its internal 10 kΩ pulldown

resistor allows.

Maximum R_Lvs. Supply Voltage

Voltage Reference Power Supply Rejection

I_OUT: Voltage Compliance vs. Temperature

V/I CONVERTER

The ground referenced, input signal from the buffer amplifier is

converted to a 0 to 0.8 mA current by A2 and level shifted to

the positive supply. A current mirror then multiplies this signal

by a factor of 20 to make the signal current of 0 to 16 mA. This

technique allows the output stage to drive a load to within 2 V

of the positive supply (V_S). Amplifier A2 forces the voltage at

Pin 1 across resistors R1 and R2 by driving the Darlington tran-

sistor, Q2. The high gain Darlington transmits the resistor cur-

rent to its collector and to R3 (900 Ω). A3 forces the level

shifted signal across the 45 Ω resistor to get a current gain of 20.

The transfer function of the V/I stage is therefore:

I_OUT= 20 × V₍_PIN1/ R1 + R2

(

)

resulting in a 0-16 mA output swing for a 0–10 V input. Tying

Pin 4 (2 V FS) to ground shorts out R2 and results in a 2 V

full-scale input for a 16 mA output span.

The output stage of the V/I converter is of a unique design that

allows the I_OUTpin to drive a load below the common (sub-

strate) potential of the device. The output transistor can always

–4–

REV. A

1 2 345 6 7...12

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AD694JN 替代型号

型号	品牌	替代类型	描述	数据表
AD694JNZ	ADI	类似代替	4â20 mA Transmitter
AD694BQ	ADI	类似代替	4.20 mA Transmitter
AD694AQ	ADI	类似代替	4.20 mA Transmitter

与AD694JN相关器件

型号	品牌	获取价格	描述	数据表
AD694JNZ	ADI	获取价格	4â20 mA Transmitter
AD698	ADI	获取价格	Universal LVDT Signal Conditioner
AD698AP	ADI	获取价格	Universal LVDT Signal Conditioner
AD698APZ	ADI	获取价格	Universal LVDT Signal Conditioner
AD698SQ	ADI	获取价格	Universal LVDT Signal Conditioner
AD6A1950/2140F60DCA	VANLONG	获取价格	Array Duplexer (AD Type)
AD6C101	SSOUSA	获取价格	1 Form A Solid State Relay
AD6C111	SSOUSA	获取价格	1 Form A Solid State Relay
AD6C111-E	SSOUSA	获取价格	1 Form A Solid State Relay
AD6C111-L	SSOUSA	获取价格	1 Form A Solid State Relay

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