HS574AC

更新时间： 2024-01-14 07:50:59

品牌	Logo	应用领域
西伯斯 - SIPEX		转换器模数转换器
页数	文件大小	规格书
14页	208K
描述
12-Bit Sampling A/D Converters

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技术参数
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HS574AC 技术参数

生命周期：	Obsolete	包装说明：	LCC-28
Reach Compliance Code：	unknown	风险等级：	5.56
Is Samacsys：	N	最大模拟输入电压：	16.5 V
最小模拟输入电压：	-16.5 V	最长转换时间：	25 µs
转换器类型：	ADC, SUCCESSIVE APPROXIMATION	JESD-30 代码：	S-CQCC-N28
长度：	11.43 mm	最大线性误差 (EL)：	0.012%
位数：	12	功能数量：	1
端子数量：	28	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：	QCCN	封装形状：	SQUARE
封装形式：	CHIP CARRIER	认证状态：	Not Qualified
座面最大高度：	2.29 mm	标称供电电压：	15 V
表面贴装：	YES	温度等级：	MILITARY
端子形式：	NO LEAD	端子节距：	1.27 mm
端子位置：	QUAD	宽度：	11.43 mm
Base Number Matches：	1

HS574AC 数据手册

∆V

_ERROR= ∆t

R/C

(ACQ)

SAMPLE

POINT

ACQUISITION

TIME

∆V_ERROR

WAIT FOR

CONVERT SIGNAL

WAIT FOR

BUS READ

CONVERSION

∆t

ACQUISITION TIME =

APERTURE DELAY TIME =

CDAC VOLTAGE

0 VOLTS

0.12 x t

CONVERT

Figure 1. Aperture Uncertainty

Figure 3. Sample–and–Hold Function

acquisition of the input by the CDAC (this time

is defined as t_ACQ). Following these two cycles,

the input sample is taken and held. The A/D

conversion follows this cycle with the duration

controlled by the internal clock cycle, which is

determined by the specific product model. Note

that because the sample is taken relative to the

R/C transition, t_ACQis also the traditional “aper-

ture delay” of this internal sample and hold.

the input which will upset the buffer output and

may add error to the conversion itself.

Furthermore, the isolation of the input after the

acquisition time in the HS574A/SP674A allows

the user an opportunity to release the hold on an

external sample-and-hold and start it tracking

the next sample. This will increase system

throughput with the user's existing components.

Since

is measured in clock cycles, its

duration^ACw^Qill vary with the internal clock

When using an external S/H, the HS574A/

SP674A acts as any other 574–type device be-

causetheinternalS/Histransparent.Thesample/

hold function in the HS574A/SP674A is inher-

enttothecapacitorDACstructure, anditstiming

characteristics are determined by the internally

generated clock. However, for multiplexer op-

eration, the internal S/H may eliminate the need

for an external S/H. The operation of the S/H

function is internal to the HS574A/SP674A and

iscontrolledthroughthenormalR/Ccontrolline

(refer to Figure 3). When the R/C line makes a

negative transition, the HS574A/SP674A starts

the timing of the sampling and conversion. The

first two clock cycles are allocated to signal

frequency. This results in T

= 2.9µ sec

±1.1µsecsbetweenunitsandov^Ae^Cr^Qtemperatures.

Offset, gain and linearity errors of the S/H cir-

cuit, as well as the effects of its droop rate, are

included in the overall specs for the HS574A/

SP674A.

USING THE SPX74A SERIES

Typical Interface Circuit

The HS574A/SP674A is a complete A/D con-

verter that is fully operational when powered up

and issued a Start Convert Signal. Only a few

external components are necessary. Figure 4

depicts a typical interface circuit for operating

the HS574A/SP674A in a unipolar input mode.

Figure 5 depicts a typical interface circuit for

operating the HS574A/SP674A in a bipolar in-

put mode. Further information is given in the

followingsectionsontheseconnections,butfirst

a few considerations concerning board layout to

achieve the best operation.

25pF

R_EQ= 4KΩ at any range.

T = R_EQx C_EQ= 100ns.

For each application of this device, strict atten-

tion must be given to power supply decoupling,

board layout (to reduce pickup between analog

Figure 2. Equivalent SP574A Input Circuit

1...3 4 567 8 9...14

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与HS574AC相关器件

型号	品牌	描述	获取价格	数据表
HS574AC/LCC	SIPEX	ADC, Successive Approximation, 12-Bit, 1 Func, Parallel, Word Access, CQCC28, LCC-28	获取价格
HS574AJ	SIPEX	12-Bit Sampling A/D Converters	获取价格
HS574AJ/JLCC	SIPEX	A/D Converter, 12-Bit, 1 Func, PQCC28,	获取价格
HS574AJ/LCC	ETC	Analog-to-Digital Converter， 12-Bit	获取价格
HS574AK	SIPEX	12-Bit Sampling A/D Converters	获取价格
HS574AK/JLCC	SIPEX	A/D Converter, 12-Bit, 1 Func, PQCC28,	获取价格

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