AD693AE

更新时间： 2024-01-10 11:52:48

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	499K
描述
Loop-Powered 4.20 mA Sensor Transmitter

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技术参数
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AD693AE 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	not_compliant	HTS代码：	8542.39.00.01
风险等级：	5.61	Is Samacsys：	N
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-GDIP-T20
JESD-609代码：	e0	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	CERAMIC, GLASS-SEALED
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 SPECIFIED
认证状态：	Not Qualified	座面最大高度：	5.08 mm
表面贴装：	NO	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	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 SPECIFIED	宽度：	7.62 mm
Base Number Matches：	1

AD693AE 数据手册

AD693

Figure 11. Using an External Pass Transistor to Minimize Self-Heating Errors

of adjustment of the output current from nominal. Substitute

this value in the appropriate formula below for adjustment at the

4 mA tap.

0-to-75 mV signal in the 0-to-20 mA mode). The gain of this

amplifier is trimmed to 2.00 so that an input signal ranging from

0-to-30 mV will drive the V/I section to produce 4-to -20 mA.

Joining P1 and P2 (Pins 15 and 16) will reduce the Signal Ampli-

fier gain to one, thereby requiring a 60 mV signal to drive the V/I

to a full 20 mA span.

R_Z1= (1.6 V/I_A) – 400 Ω and

R_Z2= R_Z1× 3.1 V/(15 mV + I_A× 3.75 Ω)

Use a similar connection with the following resistances for

adjustments at the 12 mA tap.

To produce spans less than 30 mV, an external resistor, R_S1, can

be connected between P1 and 6.2 V. The nominal value is given

by:

_Z1= (4.8 V/I_A) – 400 Ω and

400 Ω

_Z2= R_Z1× 3.1 V/(45 mV + I_A× 3.75 Ω)

R_S1

30 mV

These formulae take into account the ±10% tolerance of tap

resistance and insure a minimum adjustment range of I_A. For

example, choosing I_A= 200 µA will give a zero adjustment range

of ±1% of the 20 mA full-scale output. At the 4 mA tap the

maximum value of:

−1

where S is the desired span. For example, to change the span to

6 mV a value of:

400 Ω

R_S1

= 100 Ω

30 mV

6 mV

_Z1= 1.6 V/200 µA – 400 Ω = 7.6 kΩ and

−1

R_Z2= 7.6 kΩ × 3.1 V/(15 mV + 200 µA × 3.75 Ω) = 1.49 MΩ

is required. Since the internal, 800 Ω gain setting resistors

exhibit an absolute tolerance of 10%, R_S1should be provided

with up to ±10% range of adjustment if the span must be well

controlled.

For spans between 30 mV and 60 mV a resistor R_S2should be

connected between P1 and P2. The nominal value is given by:

60 mV

400 Ω 1−

R_S2

30 mV

−1

For example, to change the span to 40 mV, a value of:

60 mV

40 mV

400 Ω 1−

R_S2

= 800 Ω

30 mV

40 mV

−1

Figure 12. Optional 4 mA Zero Adjustment (12 mA Trim

Available Also)

is required. Remember that this is a nominal value and may

require adjustment up to ±10%. In many applications the span

must be adjusted to accommodate individual variations in the

sensor as well as the AD693. The span changing resistor should,

therefore, include enough adjustment range to handle both the

sensor uncertainty and the absolute resistance tolerance of P1

and P2. Note that the temperature coefficient of the internal

resistors is nominally –17 ppm/°C, and that the external

resistors should be comparably stable to insure good tempera-

ture performance.

These can be rounded down to more convenient values of

7.5 kΩ and 1.3 MΩ, which will result in an adjustment range

comfortably greater than ±200 µA.

ADJUSTING INPUT SPAN

Input Span is adjusted by changing the gain of the Signal

Amplifier. This amplifier provides a 0-to-60 mV signal to the

V/I section to produce the 4-to-20 mA output span (or a

REV. A

–7–

1...4 5 678 9 10...12

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与AD693AE相关器件

型号	品牌	描述	获取价格	数据表
AD693AQ	ADI	Loop-Powered 4.20 mA Sensor Transmitter	获取价格
AD693BQ	ADI	Loop-Powered 4â20 mA Sensor Transmitter	获取价格
AD694	ADI	4.20 mA Transmitter	获取价格
AD694*	ETC	4?0 mA Transmitter	获取价格
AD694_02	ADI	4â20 mA Transmitter	获取价格
AD694AQ	ADI	4.20 mA Transmitter	获取价格

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