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AD5405 - Analog Devices - Dual 12-Bit/ High Bandwidth/ Multiplying DAC with 4-Quadrant Resistors and Parallel Interface

Номер произв AD5405
Описание Dual 12-Bit/ High Bandwidth/ Multiplying DAC with 4-Quadrant Resistors and Parallel Interface
Производители Analog Devices
логотип Analog Devices логотип 
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AD5405 Даташит, Описание, Даташиты
Dual 12-Bit, High Bandwidth, Multiplying DAC with
4-Quadrant Resistors and Parallel Interface
FEATURES
On chip 4-quadrant resistors allow flexible output ranges
10 MHz multiplying bandwidth
Fast parallel interface write cycle: 58 MSPS
2.5 V to 5.5 V supply operation
±10 V reference input
Extended temperature range: 40°C to 125°C
40-lead LFCSP package
Guaranteed monotonic
4-quadrant multiplication
Power-on reset
Readback function
.5 µA typical current consumption
APPLICATIONS
Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
Digitally-controlled calibration
Programmable filters and oscillators
Composite video
Ultrasound
Gain, offset, and voltage trimming
AD5405
GENERAL DESCRIPTION
The AD54051 is a dual CMOS, 12-bit, current output digital-
to-analog converter (DAC).This device operates from a 2.5 V to
5.5 V power supply, making it suited to battery-powered and
other applications.
The applied external reference input voltage (VREF) determines
the full-scale output current. An integrated feedback resistor
(RFB) provides temperature tracking and full-scale voltage
output when combined with an external I-to-V precision
amplifier. This device also contains all the 4-quadrant resistors
necessary for bipolar operation and other configuration modes.
This DAC utilizes data readback, allowing the user to read the
contents of the DAC register via the DB pins. On power-up, the
internal register and latches are filled with zeros and the DAC
outputs are at zero scale.
As a result of manufacture with a CMOS submicron process, the
device offers excellent 4-quadrant multiplication characteristics,
with large signal multiplying bandwidths of up to 10 MHz.
The AD5405 has a 6 mm × 6 mm, 40-lead LFCSP package.
1 US Patent Number 5,689,257.
VDD
DATA
INPUTS
DB0
DB11
AD5405
R3A R2_3A R2A
R3 R2
2R 2R
VREFA R1A
R1
2R
RFB
2R
INPUT
BUFFER
LATCH
12-BIT
R-2R DAC A
RFBA
IOUT1A
IOUT2A
DAC A/B
CS
R/W
LDAC
GND
CONTROL
LOGIC
LATCH
12-BIT
R-2R DAC B
POWER-ON
RESET
R3 R2
2R 2R
R1
2R
R3B R2_3B R2B VREFB R1B
RFB
2R
Figure 1. AD5405 Functional Block Diagram
IOUT1B
IOUT2B
RFB B
Rev. 0
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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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AD5405 Даташит, Описание, Даташиты
AD5405
TABLE OF CONTENTS
Specifications..................................................................................... 3
Timing Characteristics..................................................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 13
General Description ....................................................................... 14
DAC Section................................................................................ 14
Circuit Operation ....................................................................... 14
Single-Supply Applications........................................................ 15
Positive Output Voltage ............................................................. 15
REVISION HISTORY
7/04—Revision 0: Initial Version
Adding Gain................................................................................ 15
Used as a Divider or Programmable Gain Element............... 16
Reference Selection .................................................................... 16
Amplifier Selection .................................................................... 16
Parallel Interface......................................................................... 17
Microprocessor Interfacing....................................................... 17
PCB Layout and Power Supply Decoupling ........................... 17
Evaluation Board for the DACs................................................ 18
Overview of AD54xx Devices....................................................... 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 23
Rev. 0 | Page 2 of 24
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AD5405 Даташит, Описание, Даташиты
AD5405
SPECIFICATIONS1
VDD = 2.5 V to 5.5 V, VREFA = VREFB = 10 V, IOUT2 = 0 V. All specifications TMIN to TMAX, unless otherwise noted. DC performance measured
with OP1177, AC performance with AD9631, unless otherwise noted.
Table 1.
Parameter
STATIC PERFORMANCE
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
Gain Error Temp Coefficient2
Bipolar Zero-Code Error
Output Leakage Current
REFERENCE INPUT2
Reference Input Range
VREFA, VREFB Input Resistance
VREFA to VREFB Input Resistance
Mismatch
R1, RFB Resistance
R2, R3 Resistance
R2 to R3 Resistance Mismatch
DIGITAL INPUTS/OUTPUT2
Input High Voltage, VIH
Input Low Voltage, VIL
Input Leakage Current, IIL
Input Capacitance
VDD = 4.5 V to 5.5 V
Output Low Voltage, VOL
Output High Voltage, VOH
VDD = 2.5 V to 3.6 V
Output Low Voltage, VOL
Output High Voltage, VOH
DYNAMIC PERFORMANCE2
Reference Multiplying BW
Output Voltage Settling Time
Digital Delay
Digital-to-Analog Glitch Impulse
Multiplying Feedthrough Error
Output Capacitance
Digital Feedthrough
Total Harmonic Distortion
Output Noise Spectral Density
Min Typ Max Unit
Conditions
12 Bits
±1 LSB
−1/+2 LSB
Guaranteed monotonic
±25 mV
±5 ppm FSR/°C
±25 mV
±1 nA
Data = 0x0000, TA = 25°C, IOUT1
±10 nA
Data = 0x0000H, IOUT1
Typical resistor TC = 50 ppm/°C
±10 V
8
10 12
kΩ
DAC input resistance
1.6 2.5
%
Typ = 25°C, Max = 125°C
16
20 24
kΩ
16
20 24
kΩ
.06 .18
%
Typ = 25°C, Max = 125°C
1.7 V VDD = 2.5 V to 5.5 V
0.8 V
VDD = 2.7 V to 5.5 V
0.7 V
VDD = 2.5 V to 2.7 V
1 µA
10 pF
VDD − 1
0.4 V
V
ISINK = 200 µA
ISOURCE = 200 µA
VDD −0.5
0.4 V
V
ISINK = 200 µA
ISOURCE = 200 µA
10
80 120
20 40
3
−75
2
4
5
−75
−75
25
MHz
ns
ns
nV-s
dB
pF
pF
nV-s
dB
dB
nV/√Hz
VREF = 5 V pk-pk, DAC loaded all 1s
Measured to ±1 mV of FS. RLOAD = 100 Ω, CLOAD =15 pF.
DAC latch alternately loaded with 0s and 1s.
1 LSB change around major carry, VREF = 0 V
DAC latch loaded with all 0s. Reference = 10 kHz
DAC latches loaded with all 0s
DAC latches loaded with all 1s
Feedthrough to DAC output with CS high and
alternate loading of all 0s and all 1s
VREF = 5 V p-p, all 1s loaded, f = 1 kHz
VREF = 5 V, sine wave generated from digital code
@ 1 kHz
Rev. 0 | Page 3 of 24
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