AD7849ARZ

更新时间： 2024-09-30 12:32:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器数模转换器光电二极管信息通信管理 PC
页数	文件大小	规格书
20页	351K
描述
Serial Input, 14-Bit/16-Bit DAC

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AD7849ARZ 数据手册

Serial Input,

14-Bit/16-Bit DAC

AD7849

FEATURES

FUNCTIONAL BLOCK DIAGRAM

14-bit/16-bit multiplying DAC

Guaranteed monotonicity

Output control on power-up and power-down internal or

external control

Versatile serial interface

REF+

OFS

RST IN

OUT

10-BIT/

12-BIT

DAC

DAC clears to 0 V in both unipolar and bipolar output ranges

LOGIC

CIRCUITRY

10/

APPLICATIONS

DAC

LATCH

REF–

Industrial process controls

PC analog I/O boards

Instrumentation

VOLTAGE

MONITOR

10/

AGND

RST OUT

INPUT

LATCH

AD7849

INPUT SHIFT REGISTER/

CONTROL LOGIC

SYNC CLR

DCEN SDOUT

LDAC

DGND SDIN SCLK

BIN/

COMP

Figure 1.

GENERAL DESCRIPTION

The AD7849 is a 14-bit/16-bit serial input multiplying digital-

to-analog converter (DAC). The DAC architecture ensures

excellent differential linearity performance, and monotonicity is

guaranteed to 14 bits for the A grade and to 16 bits for all other

grades over the specified temperature ranges.

The AD7849 has a versatile serial interface structure and can be

controlled over three lines to facilitate opto-isolator applications.

SDOUT is the output of the on-chip shift register and can be

used in a daisy-chain fashion to program devices in the multi-

channel system. The daisy-chain enable (DCEN) input controls

this function.

During power-up and power-down sequences (when the supply

voltages are changing), the V_OUTpin is clamped to 0 V via a low

impedance path. To prevent the output of A3 from being shorted to

0 V during this time, Transmission Gate G1 is also opened. These

conditions are maintained until the power supplies stabilize,

and a valid word is written to the DAC register. At this time, G2

opens and G1 closes. Both transmission gates are also externally

BIN

/COMP set to 1,

The

/COMP pin sets the DAC coding; with

BIN

/COMP set

to 0, the coding is straight binary; and with

the coding is twos complement. This allows the user to reset the

DAC to 0 V in both the unipolar and bipolar output ranges.

The part is available in a 20-lead PDIP package and a 20-lead SOIC

package.

RSTIN

controllable via the reset in ( ) control input. For instance, if

RSTIN

input is driven from a battery supervisor chip, then

the

at power-off or during a brown out, the

low to open G1 and close G2. The DAC must be reloaded, with

RSTIN

input is driven

RSTIN

high, to reenable the output. Conversely, the on-chip

RSTOUT

voltage detector output (

) is also available to the user

to control other parts of the system.

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

www.analog.com

12 3 4 5 6 7...20

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AD7849ARZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7849CRZ	ADI	类似代替	Serial Input, 14-Bit/16-Bit DAC
AD7849BRZ-REEL	ADI	类似代替	Serial Input, 14-Bit/16-Bit DAC
AD7849BRZ	ADI	类似代替	Serial Input, 14-Bit/16-Bit DAC

与AD7849ARZ相关器件

型号	品牌	获取价格	描述	数据表
AD7849ARZ-REEL	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BN	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BNZ	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BR	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BR-REEL	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BRZ	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849BRZ-REEL	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849CN	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849CNZ	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC
AD7849CR	ADI	获取价格	Serial Input, 14-Bit/16-Bit DAC

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