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AD5025BRUZ Datasheet

  • AD5025BRUZ

  • Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V t...

  • 33頁(yè)

  • AD

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Fully Accurate 12-/14-/16-Bit V
OUT
DAC SPI Interface
2.7 V to 5.5 V in a TSSOP
Preliminary Technical Data
FEATURES
Low power Dual 12-/14-/16 bit DAC, 鹵 1LSB INL
Individual Voltage reference pins
Rail-to-rail operation
2.7 V to 5.5 V power supply
Power-on reset to zero scale or midscale
Power down to 400 nA @ 5 V, 200 nA @ 3 V
3 power-down functions
Per channel power-down
Low glitch upon power up
Hardware Power Down lock Out Capability
Hardware LDAC with LDAC override function
CLR Function to programmable code
SDO daisy-chaining option
14 lead TSSOP
Functional Block Diagrams
V
DD
LDAC
INPUT
REGISTER
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
DAC B
BUFFER
V
OUT
B
DAC
REGISTER
V
REFA
V
REFB
AD5025/45/65
SCLK
DAC A
BUFFER
V
OUT
A
SYNC
DIN
PDL
AD5025/AD5045R/AD5065
POWER-ON
RESET
POWER-DOWN
LOGIC
0000-001
SDO
LDAC CLR
GND
POR
Figure 1.AD5025/45/65
Table 1. Related Devices
Part No.
AD5666
AD5066
AD5064/44/24
AD5063/62
AD5061
AD5060/40
Description
Quad,16-bit buffered D/A,16 LSB INL, TSSOP
Quad,16-bit unbuffered D/A,1 LSB INL, TSSOP
Quad 16-bit
nanoDAC,
1 LSB INL, TSSOP
16-bit
nanoDAC,
1 LSB INL, MSOP
16-/14bit
nanoDAC,
4 LSB INL, SOT-23
16-/14bit
nanoDAC,
1 LSB INL, SOT-23
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5025/45/65 are low power, dual 12-/14-/16-bit buffered
voltage-out DACs offering relative accuracy specs of 1 LSB INL
with individual reference pins and can operate from a single 2.7
V to 5.5 V supply. The AD5025/45/65 64 parts also offer a
differential accuracy specification of 鹵1 LSB. The parts use a
versatile 3-wire, low power Schmitt trigger serial interface that
operates at clock rates up to 50 MHz and is compatible with
standard SPI廬, QSPI鈩? MICROWIRE鈩? and DSP interface
standards. The reference for the AD5025/45 and AD5065 are
supplied from an external pin. A reference buffer is also
provided on-chip. The AD5025/45/64 incorporates a power-on
reset circuit that ensures the DAC output powers up zero scale
or midscale and remains there until a valid write takes place to
the device. The AD5025/45/65 contain a power-down feature
that reduces the current consumption of the device to typically
330 nA at 5 V and provides software selectable output loads
while in power-down mode. The parts are put into power-down
mode over the serial interface. Total unadjusted error for the
parts is <2 mV.
Both parts exhibit very low glitch on power-up. The outputs of
all DACs can be updated simultaneously using the LDAC
function, with the added functionality of user-selectable DAC
channels to simultaneously update. There is also an
asynchronous CLR that clears all DACs to a software-selectable
code鈥? V, midscale, or full scale. The Part also features a power
down lockout pin PDL, which can be used to prevent the DAC
from entering power down under any circumstances over the
serial interface.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
6.
7.
Dual channel available in 14-lead TSSOP package with
individual Voltage reference pins.
12-/14-/-16 bit accurate, 1 LSB INL.
Low glitch on power-up.
High speed serial interface with clock speeds up to 50 MHz.
Three power-down modes available to the user.
Reset to known output voltage (zero scale or midscale).
Power Down lockout capability.
Rev. PrB
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 registered trademarks are the 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
Fax: 781.461.3113
漏 2007 Analog Devices, Inc. All rights reserved.

AD5025BRUZ 產(chǎn)品屬性

  • Data Converter FundamentalsDAC Architectures

  • 96

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器

  • nanoDAC™

  • 5.8µs

  • 12

  • 串行，SPI?

  • 2

  • 單電源

  • 13.5mW

  • -40°C ~ 125°C

  • 表面貼裝

  • 14-TSSOP（0.173"，4.40mm 寬）

  • 14-TSSOP

  • 管件

  • 2 電壓，單極；2 電壓，雙極

  • *

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