DAC9881

更新时间： 2024-11-06 04:14:07

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
38页	1433K
描述
18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER

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DAC9881 数据手册

DAC9881

www.ti.com ......................................................................................................................................................... SBAS438A–MAY 2008–REVISED AUGUST 2008

18-Bit, Single-Channel, Low-Noise, Voltage-Output

DIGITAL-TO-ANALOG CONVERTER

FEATURES

DESCRIPTION

234

•

18-Bit Monotonic Over Temperature Range

Relative Accuracy: ±2LSB Max

Low-Noise: 24nV/√Hz

The DAC9881 is an 18-bit, single-channel,

voltage-output digital-to-analog converter (DAC). It

features 18-bit monotonicity, excellent linearity, very

low-noise, and fast settling time. The on-chip

precision output amplifier allows rail-to-rail output

swing to be achieved over the full supply range of

2.7V to 5.5V.

•

Fast Settling: 5µs

On-Chip Output Buffer Amplifier with

Rail-to-Rail Operation

•

Single Power Supply: +2.7V to +5.5V

DAC Loading Control

The device supports a standard SPI serial interface

capable of operating with input data clock frequencies

up to 50MHz. The DAC9881 requires an external

reference voltage to set the output range of the DAC

channel. A programmable power-on reset circuit is

also incorporated into the device to ensure that the

DAC output powers up at zero-scale or midscale, and

remains there until a valid write command.

Selectable Power-On Reset to Zero-Scale or

Midscale

•

Power-Down Mode

Unipolar Straight Binary or

Twos Complement Input Mode

Additionally, the DAC9881 has the capability to

function in either unipolar straight binary or twos

complement mode. The DAC9881 provides

low-power operation. To further save energy,

power-down mode can be achieved by accessing the

PDN pin, thereby reducing the current consumption to

25µA at 5V. Power consumption is 4mW at 5V,

reducing to 125µW in power-down mode.

•

Fast SPI™ Interface with Schmitt-Triggered

Inputs: up to 50MHz, 1.8V/3V/5V Logic

Small Package: QFN-24, 4mm × 4mm

APPLICATIONS

•

Automatic Test Equipment

Precision Instrumentation

Industrial Control

The DAC9881 is available in a 4mm × 4mm QFN-24

package with a specified temperature range of –40°C

to +105°C.

Data Acquisition Systems

DGND

IOV_DD

AGND

AV_DD

V_REFH-S V_REFH-F

DAC9881

RST

RSTSEL

USB/BTC

GAIN

Power-On

Reset

Control

Logic

Resistor

Network

SDI

PDN

V_OUT

R_FB

SCLK

Input

DAC

Latch

DAC

(1)

R_FB

SDOSEL

Serial Out

Control

NOTE: (1) R_FB= 5kW for gain = 1,

R_FB= 10kW for gain = 2.

SDO

LDAC

V_REFL-S

V_REFL-F

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.

SPI, QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...38

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DAC9881_0808	TI	获取价格	18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
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DAC9881SBRGER	TI	获取价格	18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
DAC9881SBRGERG4	TI	获取价格	SERIAL INPUT LOADING, 5us SETTLING TIME, 18-BIT DAC, PQCC24, 4 X 4 MM, GREEN, PLASTIC, VQF
DAC9881SBRGET	TI	获取价格	18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
DAC9881SBRGETG4	TI	获取价格	SERIAL INPUT LOADING, 5us SETTLING TIME, 18-BIT DAC, PQCC24, 4 X 4 MM, GREEN, PLASTIC, VQF
DAC9881SRGER	TI	获取价格	18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
DAC9881SRGET	TI	获取价格	18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER
DAC9881SRGETG4	TI	获取价格	适用于高精度应用的 18 位、单通道、低噪声电压输出 DAC \| RGE \| 24 \| -

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