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AD5663 - Analog Devices - Dual 16-Bit nanoDAC

Номер произв AD5663
Описание Dual 16-Bit nanoDAC
Производители Analog Devices
логотип Analog Devices логотип 
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AD5663 Даташит, Описание, Даташиты
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2.7 V to 5.5 V, 250 μA, Rail-to-Rail Output,
Dual 16-Bit nanoDAC®
AD5663
FEATURES
Low power, dual 16-bit nanoDAC
Relative accuracy: ±12 LSBs maximum
Guaranteed monotonic by design
10-lead MSOP and 3 mm × 3 mm LFCSP_WD
2.7 V to 5.5 V power supply
Per channel power-down
Power-on reset to zero scale or midscale
Hardware LDAC and CLR functions
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
GENERAL DESCRIPTION
The AD5663, a member of the nanoDAC family, is a low power,
dual, 16-bit buffered voltage-out DAC that operates from a single
2.7 V to 5.5 V supply and is guaranteed monotonic by design.
The AD5663 requires 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 or
midscale (AD5663-1) and remains there until a valid write takes
place. The part contains 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 this part in normal operation
makes it ideally suited to portable, battery-operated equipment.
The power consumption is 1.25 mW at 5 V, going down to
2.4 μW in power-down mode.
The on-chip precision output amplifier of the AD5663 allows
rail-to-rail output swing to be achieved.
The AD5663 uses a versatile, 3-wire serial interface that
operates at clock rates up to 50 MHz and is compatible with
standard SPI®, QSPI™, MICROWIRE™, and DSP interface
standards.
SCLK
SYNC
DIN
FUNCTIONAL BLOCK DIAGRAM
VDD
VREF
LDAC
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
VOUTA
VOUTB
LDAC CLR
AD5663
POWER-ON
RESET
GND
Figure 1.
POWER-DOWN
LOGIC
Table 1. Related Devices
Part No.
AD5623R/AD5643R/AD5663R
Description
2.7 V to 5.5 V, dual 12-/14-/16-bit
DACs with internal reference
PRODUCT HIGHLIGHTS
1. Dual 16-bit DAC; relative accuracy of ±12 LSBs maximum.
2. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm
LFCSP_WD packages.
3. Low power; typically consumes 0.6 mW at 3 V and
1.25 mW at 5 V.
4. 7 μs maximum settling time.
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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AD5663 Даташит, Описание, Даташиты
AD5663
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AC Characteristics........................................................................ 4
Timing Characteristics ................................................................ 5
Timing Diagram ........................................................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Description .............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 12
Theory of Operation ...................................................................... 14
D/A Section................................................................................. 14
Resistor String ............................................................................. 14
REVISION HISTORY
4/06—Revision 0: Initial Version
Output Amplifier........................................................................ 14
Serial Interface ............................................................................ 14
Input Shift Register .................................................................... 14
SYNC Interrupt .......................................................................... 15
Power-On Reset.......................................................................... 15
Software Reset............................................................................. 15
Power-Down Modes .................................................................. 16
LDAC Function .......................................................................... 16
Microprocessor Interfacing....................................................... 18
Applications..................................................................................... 19
Choosing a Reference for the AD5663.................................... 19
Using a Reference as a Power Supply for the AD5663 .......... 19
Bipolar Operation Using the AD5663 ..................................... 20
Using the AD5663 with a Galvanically Isolated Interface .... 20
Power Supply Bypassing and Grounding................................ 20
Outline Dimensions ....................................................................... 21
Ordering Guide .......................................................................... 21
Rev. 0 | Page 2 of 24
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AD5663 Даташит, Описание, Даташиты
AD5663
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.
A Grade1
B Grade1
Parameter
Min Typ Max Min Typ Max Unit
Conditions/Comments
STATIC PERFORMANCE2
AD5663
Resolution 16 16
Bits
Relative Accuracy
±8 ±16
±6 ±12 LSB
Differential Nonlinearity
±1
±1 LSB
Guaranteed monotonic by design
Zero-Scale Error
+2 +10
+2 +10 mV
All 0s loaded to DAC register
Offset Error
±1 ±10
±1 ±10 mV
Full-Scale Error
−0.15 ±1
−0.15 ±1 % of FSR All 1s loaded to DAC register
Gain Error
Zero-Scale Error Drift3
±1.5
±2
±1.5 % of FSR
±2 μV/°C
Gain Temperature Coefficient
±2.5
±2.5 ppm Of FSR/°C
DC Power Supply Rejection Ratio
DC Crosstalk
−100
10
10
−100
10
10
dB
μV
μV/mA
DAC code = midscale, VDD ± 10%
Due to full-scale output change
RL = 2 kΩ to GND or VDD
Due to load current change
5 5 μV Due to powering down (per channel)
OUTPUT CHARACTERISTICS2
Output Voltage Range
Capacitive Load Stability
DC Output Impedance
0 VDD 0
VDD V
2 2 nF
10 10 nF
0.5 0.5 Ω
RL = ∞
RL = 2 kΩ
Short-Circuit Current
Power-Up Time
REFERENCE INPUTS
30
4
30 mA VDD = 5 V
4 μs Coming out of power-down mode;
VDD = 5 V
Reference Current
Reference Input Range
Reference Input Impedance
170 200
170 200 μA
0.75 VDD 0.75 VDD V
26 26 kΩ
VREF = VDD = 5.5 V, 3.6 V
LOGIC INPUTS3
Input Current
±2
±2 μA
All digital inputs
VINL, Input Low Voltage
VINH, Input High Voltage
Pin Capacitance
2
3
0.8
2
3
0.8 V
V
pF
VDD = 5 V, 3 V
VDD = 5 V, 3 V
DIN, SCLK, and SYNC
19 19 pF LDAC and CLR
POWER REQUIREMENTS
VDD
IDD (Normal Mode)4
VDD = 4.5 V to 5.5 V
VDD = 2.7 V to 3.6 V
IDD (All Power-Down
Modes)5
2.7 5.5 2.7
5.5 V
250 450
200 425
250 450 μA
200 425 μA
VIH = VDD and VIL = GND
VIH = VDD, VIL = GND
VDD = 4.5 V to 5.5 V
VDD = 2.7 V to 3.6 V
0.48 1
0.2 1
0.48 1
0.2 1
μA
μA
1 Temperature range: A grade and B grade are both equal to −40°C to +105°C.
2 Linearty calculated using a reduced code range: AD5663 (Code 512 to Code 65024). Output unloaded.
3 Guaranteed by design and characterization, not production tested.
4 Interface inactive. All DACs active. DAC outputs unloaded.
5 Both DACs powered down.
Rev. 0 | Page 3 of 24
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