Datasheet > AD7840KP-REEL

AD7840KP-REEL

更新时间： 2024-02-02 13:54:18

品牌	Logo	应用领域
亚德诺 - ADI		信息通信管理转换器
页数	文件大小	规格书
17页	430K
描述
Complete 14-Bit CMOS DAC

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技术参数
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AD7840KP-REEL 技术参数

Source Url Status Check Date：	2013-05-01 14:56:20.958	是否无铅：	含铅
是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QLCC	包装说明：	PLASTIC, LCC-28
针数：	28	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.27	最大模拟输出电压：	3 V
最小模拟输出电压：	-3 V	转换器类型：	D/A CONVERTER
输入位码：	BINARY	输入格式：	SERIAL, PARALLEL, WORD
JESD-30 代码：	S-PQCC-J28	JESD-609代码：	e0
长度：	11.5062 mm	最大线性误差 (EL)：	0.0061%
湿度敏感等级：	1	标称负供电电压：	-5 V
位数：	14	功能数量：	1
端子数量：	28	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：	QCCJ	封装等效代码：	LDCC28,.5SQ
封装形状：	SQUARE	封装形式：	CHIP CARRIER
峰值回流温度（摄氏度）：	225	电源：	+-5 V
认证状态：	Not Qualified	座面最大高度：	4.57 mm
最大稳定时间：	4 µs	标称安定时间 (tstl)：	2.5 µs
子类别：	Other Converters	最大压摆率：	14 mA
标称供电电压：	5 V	表面贴装：	YES
技术：	BICMOS	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn85Pb15)	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	11.5062 mm
Base Number Matches：	1

AD7840KP-REEL 数据手册

LC MOS

Complete 14-Bit DAC

AD7840

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Com plete 14-Bit Voltage Output DAC

Parallel and Serial Interface Capability

80 dB Signal-to-Noise Ratio

Interfaces to High Speed DSP Processors

e.g., ADSP-2100, TMS32010, TMS32020

45 ns m in WR Pulse Width

Low Pow er – 70 m W typ.

Operates from ؎5 V Supplies

GENERAL D ESCRIP TIO N

P RO D UCT H IGH LIGH TS

T he AD7840 is a fast, complete 14-bit voltage output D/A con-

verter. It consists of a 14-bit DAC, 3 V buried Zener reference,

DAC output amplifier and high speed control logic.

1. Complete 14-Bit D/A Function

T he AD7840 provides the complete function for creating ac

signals and dc voltages to 14-bit accuracy. T he part features

an on-chip reference, an output buffer amplifier and 14-bit

D/A converter.

T he part features double-buffered interface logic with a 14-bit

input latch and 14-bit DAC latch. Data is loaded to the input

latch in either of two modes, parallel or serial. T his data is then

transferred to the DAC latch under control of an asynchronous

signal. A fast data setup time of 21 ns allows direct

parallel interfacing to digital signal processors and high speed

16-bit microprocessors. In the serial mode, the maximum serial

data clock rate can be as high as 6 MHz.

2. Dynamic Specifications for DSP Users

In addition to traditional dc specifications, the AD7840 is

specified for ac parameters including signal-to-noise ratio and

harmonic distortion. T hese parameters along with important

timing parameters are tested on every device.

3. Fast, Versatile Microprocessor Interface

T he analog output from the AD7840 provides a bipolar output

range of ±3 V. T he AD7840 is fully specified for dynamic per-

formance parameters such as signal-to-noise ratio and harmonic

distortion as well as for traditional dc specifications. Full power

output signals up to 20 kHz can be created.

T he AD7840 is capable of 14-bit parallel and serial interfac-

ing. In the parallel mode, data setup times of 21 ns and write

pulse widths of 45 ns make the AD7840 compatible with

modern 16-bit microprocessors and digital signal processors.

In the serial mode, the part features a high data transfer rate

of 6 MHz.

T he AD7840 is fabricated in linear compatible CMOS

(LC²MOS), an advanced, mixed technology process that com-

bines precision bipolar circuits with low power CMOS logic.

T he part is available in a 24-pin plastic and hermetic

dual-in-line package (DIP) and is also packaged in a 28-termi-

nal plastic leaded chip carrier (PLCC).

REV. B

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.

Tel: 617/ 329-4700

Fax: 617/ 326-8703

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