DAC8234

更新时间： 2024-10-01 06:52:15

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
41页	1520K
描述
Quad 14-Bit High-Accuracy ±16V Output Serial Input DIGITAL-TO-ANALOG CONVERTER

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DAC8234 数据手册

DAC8234

www.ti.com ........................................................................................................................................... SBAS464A–AUGUST 2009–REVISED SEPTEMBER 2009

Quad, 14-Bit, High-Accuracy, ±16V Output, Serial Input

DIGITAL-TO-ANALOG CONVERTER

FEATURES

DESCRIPTION

2345

•

Bipolar Output: Up to ±16V

Unipolar Output: 0V to +20V

14-Bit Monotonic

The DAC8234 is a high-accuracy, quad-channel,

14-bit digital-to-analog converter (DAC) that operates

from supply voltages of ±5V to ±18V in bipolar output

mode, and from ±5V to +24V/–12V in unipolar mode.

With a 5V reference, the DAC8234 can be configured

to output ±10V, ±5V, 0V to 20V, or 0V to 10V. The

DAC8234 provides 14-bit monotonicity, excellent

integral nonlinearity (INL) error of ±0.5 LSB, low

glitch, and low noise over the operating temperature

range of –40°C to +105°C. This device is trimmed in

production for very low zero and gain errors. In

•

Relative Accuracy: 0.5 LSB Max

Low Zero and Gain Errors

–

Before User Calibration: 1 LSB

After User Calibration:

0.031 LSB Zero Error, 0.25 LSB Gain Error

•

Low Noise: 60nV/√Hz

addition,

the

DAC8234

implements

Settling Time: 6µs

user-programmable system-level calibration function

to achieve ±0.031 LSB zero error and ±0.25 LSB gain

error.

Configurable Gain: x2/x4

Analog Output Monitor

Power-Down Mode

The DAC8234 has integrated reference buffers and

output buffers. It features a standard high-speed

1.8V, 3V, or 5V serial peripheral interface (SPI) that

operates at clock rates of up to 50MHz to

communicate with a DSP or microprocessor. The four

DAC channels and the auxiliary registers are

addressed with four address bits. The device features

double-buffered interface logic for simultaneous

updates of all DACs. An asynchronous load input

(LDAC) transfers data from the input data register to

the DAC latch, and the contents of the DAC latch set

the output voltage. The asynchronous RST input sets

the output of all four DACs to 0V. The V_MONpin is an

analog monitor output that multiplexes the individual

DAC outputs or the AIN pin.

SPI™: Up to 50MHz, 1.8V/3V/5V Logic

Daisy-Chain Mode

Operating Temperature: –40°C to +105°C

Packages: QFN-40 (6x6mm), TQFP-48 (7x7mm)

APPLICATIONS

•

Automatic Test Equipment

Instrumentation

Industrial Process Control

Communications

IOV_DD

DGND

DV_DD

AGND

AV_DD

AV_SS

REF-A

REFGND-A

DAC8234

Analog

Monitor

V_MON

Reference Buffer A

Command Register

DAC Register 0

The DAC8234 is pin-compatible with the DAC8734

(16-bit) and the DAC7716 (12-bit).

SCLK

SDI

R_FB1-0

R_FB2-0

V_OUT-0

SGND-0

SPI

Shift

Input

14-Bit DAC

Zero Register 0

Gain Register 0

Control

Logic

R_FB1-1

R_FB2-1

V_OUT-1

SGND-1

SDO

DAC Register 1

DAC Register 2

DAC Register 3

Zero Register 1

Gain Register 1

RST

R_FB1-2

R_FB2-2

V_OUT-2

SGND-2

UNI/BIP-A

UNI/BIP-B

LDAC

Zero Register 2

Gain Register 2

Control

Logic

R_FB1-3

R_FB2-3

V_OUT-3

SGND-3

GPIO-0

GPIO-1

Zero Register 3

Gain Register 3

Power-Down

Control Logic

Reference Buffer B

AIN

REF-B

REFGND-B

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.

DSP is a trademark of Texas Instruments.

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...41

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DAC8234 替代型号

型号	品牌	替代类型	描述	数据表
DAC8734	TI	功能相似	Quad 16-Bit High-Accuracy ±16V Output Serial
DAC8218	TI	功能相似	Octal, 14-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER
DAC7716	TI	功能相似	Quad 12-Bit High-Accuracy ±16V Output Serial

与DAC8234相关器件

型号	品牌	获取价格	描述	数据表
DAC8234SPFB	TI	获取价格	Quad 14-Bit High-Accuracy ±16V Output Serial
DAC8234SPFBR	TI	获取价格	Quad 14-Bit High-Accuracy ±16V Output Serial
DAC8234SRHAR	TI	获取价格	Quad 14-Bit High-Accuracy ±16V Output Serial
DAC8234SRHAT	TI	获取价格	Quad 14-Bit High-Accuracy ±16V Output Serial
DAC8248	ADI	获取价格	Dual 12-Bit 8-Bit Byte Double-Buffered CMOS D/A Converter
DAC8248AW	ADI	获取价格	Dual 12-Bit 8-Bit Byte Double-Buffered CMOS D/A Converter
DAC8248AW	ROCHESTER	获取价格	PARALLEL, 8 BITS INPUT LOADING, 12-BIT DAC, CDIP24, CERDIP-24
DAC8248AW/883C	ETC	获取价格	12-Bit Digital-to-Analog Converter
DAC8248EW	ADI	获取价格	Dual 12-Bit 8-Bit Byte Double-Buffered CMOS D/A Converter
DAC8248FP	ADI	获取价格	Dual 12-Bit 8-Bit Byte Double-Buffered CMOS D/A Converter

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