DAC7553IRGTR Datasheet_PDF文件下载_芯片资料查询

Actual Size

3 mm x 3 mm

DAC7553

SLAS477 鈥?AUGUST 2005

www.ti.com

12-BIT, DUAL, ULTRALOW GLITCH, VOLTAGE OUTPUT

DIGITAL-TO-ANALOG CONVERTER

FEATURES

鈥?/div>

2.7-V to 5.5-V Single Supply

12-Bit Linearity and Monotonicity

Rail-to-Rail Voltage Output

Settling Time: 5 碌s (Max)

Ultralow Glitch Energy: 0.1 nVs

Ultralow Crosstalk: 鈥?00 dB

Low Power: 440 碌A (Max)

Per-Channel Power Down: 2 碌A (Max)

Power-On Reset to Midscale

2s Complement Input Data Format

SPI-Compatible Serial Interface: Up to 50 MHz

Daisy-Chain Capability

Asynchronous Hardware Clear

Simultaneous or Sequential Update

Specified Temperature Range: 鈥?0掳C to 105掳C

Small 3-mm 脳 3-mm, 16-Lead QFN Package

DESCRIPTION

The DAC7553 is a 12-bit, dual-channel, volt-

age-output DAC with exceptional linearity and

monotonicity. Its proprietary architecture minimizes

undesired transients such as code-to-code glitch and

channel-to-channel

crosstalk.

The

low-power

DAC7553 operates from a single 2.7-V to 5.5-V

supply. The DAC7553 output amplifiers can drive a

2-k鈩? 200-pF load rail-to-rail with 5-碌s settling time;

the output range is set using an external voltage

reference.

The 3-wire serial interface operates at clock rates up

to 50 MHz and is compatible with SPI, QSPI,

Microwire鈩? and DSP interface standards. The out-

puts of all DACs may be updated simultaneously or

sequentially. The parts incorporate a power-on-reset

circuit to ensure that the DAC outputs power up at

midscale and remain there until a valid write cycle to

the device takes place. The parts contain a

power-down feature that reduces the current con-

sumption of the device to under 2 碌A.

The small size and low-power operation makes the

DAC7553 ideally suited for battery-operated portable

applications. The power consumption is typically

1.5 mW at 5 V, 0.75 mW at 3 V, and reduces to 1 碌W

in power-down mode.

The DAC7553 is available in a 16-lead QFN package

and is specified over 鈥?0掳C to 105掳C.

APPLICATIONS

Portable Battery-Powered Instruments

Digital Gain and Offset Adjustment

Programmable Voltage and Current Sources

Programmable Attenuators

Industrial Process Control

FUNCTIONAL BLOCK DIAGRAM

V

DD

IOV

DD

V

REFA

_

SCLK

SYNC

SDIN

Interface

Logic

Input

Register

DAC

Register

String

DAC B

Input

Register

DAC

Register

String

DAC A

V

FBA

V

OUT

A

V

FBB

V

OUT

B

+

_

+

SDO

DAC7553

Power-On

Reset

Power-Down

Logic

DCEN

CLR

GND

V

REFB

PD

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Microwire is a trademark of National Semiconductor Corp..

PRODUCT PREVIEW information concerns products in the forma-

tive or design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the

right to change or discontinue these products without notice.

PRODUCT PREVIEW

产品培训模块
Data Converter Basics
标准包装
3,000
类别
集成电路 (IC)
家庭
数据采集 - 数模转换器
系列
-
设置时间
5µs
位数
12
数据接口
串行
转换器数目
2
电压电源
单电源
功率耗散（最大）
680µW
工作温度
-40°C ~ 105°C
安装类型
表面贴装
封装/外壳
16-VFQFN 裸露焊盘
供应商设备封装
16-QFN-EP（3x3）
包装
带卷 (TR)
输出数目和类型
2 电压，单极
采样率（每秒）
1M

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