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AD5664 - Analog Devices - (AD5624 / AD5664) nanoDACs

Номер произв AD5664
Описание (AD5624 / AD5664) nanoDACs
Производители Analog Devices
логотип Analog Devices логотип 
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AD5664 Даташит, Описание, Даташиты
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2.7 V to 5.5 V, 450 μA, Rail-to-Rail Output,
Quad, 12-/16-Bit nanoDACs®
AD5624/AD5664
FEATURES
Low power, quad nanoDACs
AD5664: 16 bits
AD5624: 12 bits
Relative accuracy: ±12 LSBs max
Guaranteed monotonic by design
10-lead MSOP and 3 mm × 3 mm LFCSP_WD
2.7 V to 5.5 V power supply
Power-on reset to zero
Per channel power-down
Serial interface, up to 50 MHz
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
FUNCTIONAL BLOCK DIAGRAM
VDD
GND
VREF
AD5624/AD5664
SCLK
SYNC
DIN
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
VOUTA
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
VOUTB
INPUT
REGISTER
DAC
REGISTER
STRING
DAC C
BUFFER
VOUTC
INPUT
REGISTER
DAC
REGISTER
POWER-ON
RESET
STRING
DAC D
BUFFER
POWER-DOWN
LOGIC
VOUTD
Figure 1.
Table 1. Related Devices
Part No.
AD5624R/AD5644R/AD5664R
Description
2.7 V to 5.5 V quad, 12-, 14-,
16-bit DACs with internal
reference
GENERAL DESCRIPTION
The AD5624/AD5664, members of the nanoDAC family, are
low power, quad, 12-, 16-bit buffered voltage-out DACs that
operate from a single 2.7 V to 5.5 V supply and are guaranteed
monotonic by design.
The AD5624/AD5664 require an external reference voltage to
set the output range of the DAC. The part incorporates a power-
on reset circuit that ensures the DAC output powers up to 0 V
and remains there until a valid write takes place. The parts
contain a power-down feature that reduces the current
consumption of the device to 480 nA at 5 V and provides
software-selectable output loads while in power-down mode.
The low power consumption of these parts in normal operation
makes them ideally suited to portable battery-operated
equipment. The power consumption is 2.25 mW at 5 V, going
down to 2.4 μW in power-down mode.
The AD5624/AD5664 on-chip precision output amplifier allows
rail-to-rail output swing to be achieved.
The AD5624/AD5664 use a versatile 3-wire serial interface that
operates at clock rates up to 50 MHz, and are compatible with
standard SPI®, QSPI™, MICROWIRE™, and DSP interface
standards.
PRODUCT HIGHLIGHTS
1. Relative accuracy: ±12 LSBs maximum.
2. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm,
LFCSP_WD.
3. Low power, typically consumes 1.32 mW at 3 V and
2.25 mW at 5 V.
4. Maximum settling time of 4.5 μs (AD5624) and 7 μs
(AD5664).
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2006 Analog Devices, Inc. All rights reserved.
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AD5664 Даташит, Описание, Даташиты
AD5624/AD5664
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Specifications..................................................................................... 3
AC Characteristics........................................................................ 4
Timing Characteristics ................................................................ 5
Timing Diagram ........................................................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 13
Theory of Operation ...................................................................... 15
D/A Section................................................................................. 15
Resistor String ............................................................................. 15
Output Amplifier........................................................................ 15
REVISION HISTORY
6/06—Revision 0: Initial Version
Serial Interface ............................................................................ 15
Input Shift Register .................................................................... 16
SYNC Interrupt .......................................................................... 16
Power-On Reset.......................................................................... 16
Software Reset............................................................................. 17
Power-Down Modes .................................................................. 17
LDAC Function .......................................................................... 18
Microprocessor Interfacing....................................................... 19
Applications..................................................................................... 20
Choosing a Reference for the AD5624/AD5664.................... 20
Using a Reference as a Power Supply for the
AD5624/AD5664........................................................................ 20
Bipolar Operation Using the AD5624/AD5664..................... 21
Using AD5624/AD5664 with a Galvanically Isolated
Interface ....................................................................................... 21
Power Supply Bypassing and Grounding................................ 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 22
Rev. 0 | Page 2 of 24
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AD5664 Даташит, Описание, Даташиты
AD5624/AD5664
SPECIFICATIONS
VDD = +2.7 V to +5.5 V; RL = 2 kΩ to GND; CL = 200 pF to GND; VREF = VDD; all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
STATIC PERFORMANCE2
AD5664
Resolution
Relative Accuracy
Differential Nonlinearity
Min
16
AD5624
Resolution
Relative Accuracy
Differential Nonlinearity
Zero-Code Error
Offset Error
Full-Scale Error
Gain Error
Zero-Code Error Drift
Gain Temperature
Coefficient
DC Power Supply Rejection
Ratio
DC Crosstalk
A Grade1
Typ Max
±8 ±16
±1
2 10
±1 ±10
−0.1 ±1
±1.5
±2
±2.5
−100
10
10
5
OUTPUT CHARACTERISTICS3
Output Voltage Range
Capacitive Load Stability
DC Output Impedance
Short-Circuit Current
Power-Up Time
0
VDD
2
10
0.5
30
4
REFERENCE INPUTS
Reference Current
170 200
Reference Input Range
0.75
Reference Input Impedance
26
VDD
LOGIC INPUTS3
Input Current
±2
VINL, Input Low Voltage
VINH, Input High Voltage
2
0.8
Pin Capacitance
3
B Grade1
Min Typ Max
Unit
Conditions/Comments
16 Bits
±6 ±12 LSB
±1 LSB
Guaranteed monotonic by
design
12 Bits
±0.5 ±1
LSB
±0.25 LSB
Guaranteed monotonic by
design
2 10 mV
All zeroes loaded to DAC
register
±1 ±10 mV
−0.1 ±1
% of FSR All ones loaded to DAC register
±1.5 % of FSR
±2 μV/°C
±2.5 ppm of FSR/°C
−100
10
10
5
dB
μV
μV/mA
μV
DAC code = midscale ; VDD ±
10%
Due to full-scale output
change
RL = 2 kΩ to GND or VDD
Due to load current change
Due to powering down (per
channel)
0 VDD V
2 nF
10 nF
0.5 Ω
30 mA
4 μs
RL = ∞
RL = 2 kΩ
VDD = 5 V
Coming out of power-down
mode; VDD = 5 V
170
0.75
26
200
VDD
μA
V
VREF = VDD = 5.5 V
±2 μA
0.8 V
2V
3 pF
All digital inputs
VDD = 5 V, 3 V
VDD = 5 V, 3 V
Rev. 0 | Page 3 of 24
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