AD573KD

更新时间： 2024-02-25 13:54:54

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
8页	330K
描述
10-Bit A/D Converter

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AD573KD 技术参数

Source Url Status Check Date：	2013-05-01 14:56:14.576	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：	DIP, DIP20,.3
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	3A001.A.2.C	HTS代码：	8542.39.00.01
风险等级：	7.77	最大模拟输入电压：	5 V
最小模拟输入电压：	-5 V	最长转换时间：	30 µs
转换器类型：	ADC, SUCCESSIVE APPROXIMATION	JESD-30 代码：	R-CDIP-T20
JESD-609代码：	e0	长度：	25.4 mm
最大线性误差 (EL)：	0.0977%	标称负供电电压：	-15 V
模拟输入通道数量：	1	位数：	10
功能数量：	1	端子数量：	20
最高工作温度：	125 °C	最低工作温度：	-55 °C
输出位码：	BINARY, OFFSET BINARY	输出格式：	PARALLEL, WORD
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	DIP
封装等效代码：	DIP20,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5,-12/-15 V	认证状态：	Not Qualified
采样速率：	0.05 MHz	采样并保持/跟踪并保持：	SAMPLE
座面最大高度：	5.08 mm	子类别：	Analog to Digital Converters
标称供电电压：	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 SPECIFIED	宽度：	7.62 mm
Base Number Matches：	1

AD573KD 数据手册

AD573

BIPOLAR CONNECTION

To obtain the bipolar –5 V to +5 V range with an offset binary

output code, the bipolar offset control pin is left open.

SAMPLE-HOLD AMPLIFIER CONNECTION TO THE

AD573

Many situations in high speed acquisition systems or digitizing

rapidly changing signals require a sample-hold amplifier (SHA)

in front of the A/D converter. The SHA can acquire and hold a

signal faster than the converter can perform a conversion. A

SHA can also be used to accurately define the exact point in

time at which the signal is sampled. For the AD573, a SHA can

also serve as a high input impedance buffer.

A –5.000 volt signal will give a 10-bit code of 00000000 00; an

input of 0.000 volts results in an output code of 10000000 00

and +4.99 volts at the input yields the 11111111 11 code. The

nominal transfer curve is shown in Figure 6.

Figure 8 shows the AD573 connected to the AD582 monolithic

SHA for high speed signal acquisition. In this configuration, the

AD582 will acquire a 10 volt signal in less than 10 µs with a

droop rate less than 100 µV/ms.

Figure 6. AD573 Transfer Curve— Bipolar Operation

Note that in the bipolar mode, the code transitions are offset

1/2 LSB such that an input voltage of 0 volts ±5 mV yields the

code representing zero (10000000 00). Each output code is then

centered on its nominal input voltage.

Full-Scale Calibration

Full-Scale Calibration is accomplished in the same manner as in

unipolar operation except the full scale input voltage is +4.985

volts.

Negative Full-Scale Calibration

Figure 8. Sample-Hold Interface to the AD573

The circuit in Figure 4a can also be used in bipolar operation to

offset the input voltage (nominally –5 V) which results in the

00000000 00 code. R2 should be omitted to obtain a symmetri-

cal range.

DR goes high after the conversion is initiated to indicate that

reset of the SAR is complete. In Figure 8 it is also used to put

the AD582 into the hold mode while the AD573 begins its con-

version cycle. (The AD582 settles to final value well in advance

of the first comparator decision inside the AD573).

The bipolar offset control input is not directly TTL compatible

but a TTL interface for logic control can be constructed as

shown in Figure 7.

DR goes low when the conversion is complete placing the

AD582 back in the sample mode. Configured as shown in Fig-

ure 8, the next conversion can be initiated after a 10 µs delay to

allow for signal acquisition by the AD582.

Observe carefully the ground, supply, and bypass capacitor con-

nections between the two devices. This will minimize ground

noise and interference during the conversion cycle.

GROUNDING CONSIDERATIONS

The AD573 provides separate Analog and Digital Common

connections. The circuit will operate properly with as much as

±200 mV of common-mode voltage between the two commons.

This permits more flexible control of system common bussing

and digital and analog returns.

In normal operation, the Analog Common terminal may gener-

ate transient currents of up to 2 mA during a conversion. In ad-

dition a static current of about 2 mA will flow into Analog

Common in the unipolar mode after a conversion is complete.

The Analog Common current will be modulated by the varia-

tions in input signal.

Figure 7. Bipolar Offset Controlled by Logic Gate

Gate Output = 1 Unipolar 0–10 V Input Range

Gate Output = 0 Bipolar ±5 V Input Range

The absolute maximum voltage rating between the two com-

mons is ±1 volt. It is recommended that a parallel pair of

back-to-back protection diodes be connected between the com-

mons if they are not connected locally.

REV. A

–5–

1 2 3 456 7 8

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AD573KN/+	ADI	IC IC,A/D CONVERTER,SINGLE,10-BIT,BIPOLAR,DIP,20PIN, Analog to Digital Converter	获取价格
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