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AD5664R - Analog Devices - (AD5624R - AD5664R) nanoDACs

Номер произв AD5664R
Описание (AD5624R - AD5664R) nanoDACs
Производители Analog Devices
логотип Analog Devices логотип 
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AD5664R Даташит, Описание, Даташиты
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Quad, 12-/14-/16-Bit nanoDACs® with
5 ppm/°C On-Chip Reference
AD5624R/AD5644R/AD5664R
FEATURES
Low power, smallest pin-compatible, quad nanoDACs
AD5664R: 16 bits
AD5644R: 14 bits
AD5624R: 12 bits
User selectable external or internal reference
External reference default
On-chip 1.25 V/2.5 V, 5 ppm/°C reference
10-lead MSOP and 3 mm × 3 mm LFCSP_WD
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to zero scale
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
GENERAL DESCRIPTION
The AD5624R/AD5644R/AD5664R, members of the nanoDAC
family, are low power, quad, 12-/14-/16-bit buffered voltage-out
DACs. All devices operate from a single 2.7 V to 5.5 V supply
and are guaranteed monotonic by design.
The AD5624R/AD5644R/AD5664R have an on-chip reference.
The AD56x4R-3 has a 1.25 V, 5 ppm/°C reference, giving a full-
scale output range of 2.5 V; the AD56x4R-5 has a 2.5 V,
5 ppm/°C reference giving a full-scale output range of 5 V. The
on-chip reference is off at power-up allowing the use of an
external reference and all devices can be operated from a single
2.7 V to 5.5 V supply. The internal reference is enabled via a
software write.
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 part contains a per-channel power-down
feature that reduces the current consumption of the device to
480 nA at 5 V and provides software-selectable output loads
FUNCTIONAL BLOCK DIAGRAM
VDD
GND
VREFIN/VREFOUT
AD5624R/AD5644R/AD5664R
1.25V/2.5V REF
SCLK
SYNC
DIN
INTERFACE
LOGIC
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC C
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC D
BUFFER
VOUTA
VOUTB
VOUTC
VOUTD
POWER-ON
RESET
POWER-DOWN
LOGIC
Figure 1.
Table 1. Related Devices
Part No.
AD5624/AD5664
AD5666
Description
2.7 V to 5.5 V quad, 12-/16-bit
DACs, external reference
2.7 V to 5.5 V quad 16-bit DAC,
internal reference, LDAC, CLR pins
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 AD5624R/AD5644R/AD5664R use 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. The on-chip precision output amplifier
enables rail-to-rail output swing.
PRODUCT HIGHLIGHTS
1. Quad 12-/14-/16-bit DACs.
2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference.
3. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm,
LFCSP_WD.
4. Low power, typically consumes 1.32 mW at 3 V and
2.25 mW at 5 V.
Rev. A
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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AD5664R Даташит, Описание, Даташиты
AD5624R/AD5644R/AD5664R
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD5624R-5/AD5644R-5/AD5664R-5 ....................................... 3
AD5624R-3/AD5644R-3/AD5664R-3 ....................................... 5
AC Characteristics........................................................................ 6
Timing Characteristics ................................................................ 7
Timing Diagram ........................................................................... 7
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 18
Theory of Operation ...................................................................... 20
D/A Section................................................................................. 20
Resistor String ............................................................................. 20
Output Amplifier........................................................................ 20
REVISION HISTORY
11/06—Rev. 0 to Rev A
Changes to Reference Output Parameter in Table 2 .................... 3
Changes to Reference Output Parameter in Table 3 .................... 5
Added Note to Figure 3.................................................................... 9
4/06—Revision 0: Initial Version
Internal Reference ...................................................................... 20
External Reference ..................................................................... 20
Serial Interface ............................................................................ 20
Input Shift Register .................................................................... 21
SYNC Interrupt .......................................................................... 21
Power-On Reset.......................................................................... 22
Software Reset............................................................................. 22
Power-Down Modes .................................................................. 22
LDAC Function........................................................................... 23
Internal Reference Setup ........................................................... 23
Microprocessor Interfacing....................................................... 24
Applications..................................................................................... 25
Using a Reference as a Power Supply for the
AD5624R/AD5644R/AD5664R ............................................... 25
Bipolar Operation
Using the AD5624R/AD5644R/AD5664R ............................. 25
Using AD5624R/AD5644R/AD5664R
with a Galvanically Isolated Interface...................................... 25
Power Supply Bypassing and Grounding................................ 26
Outline Dimensions ....................................................................... 27
Ordering Guide .......................................................................... 28
Rev. A | Page 2 of 28
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AD5664R Даташит, Описание, Даташиты
AD5624R/AD5644R/AD5664R
SPECIFICATIONS
AD5624R-5/AD5644R-5/AD5664R-5
VDD = 4.5 V to 5.5 V; RL = 2 kΩ to GND; CL = 200 pF to GND; VREFIN = VDD; all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
STATIC PERFORMANCE2
AD5664R
Resolution
Relative Accuracy
Differential Nonlinearity
AD5644R
Resolution
Relative Accuracy
Differential Nonlinearity
AD5624R
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
(External Reference)
Min
16
14
12
DC Crosstalk
(Internal Reference)
OUTPUT CHARACTERISTICS3
Output Voltage Range
Capacitive Load Stability
DC Output Impedance
Short-Circuit Current
Power-Up Time
REFERENCE INPUTS
0
B Grade1
Typ Max
Unit
±8
±2
±0.5
2
±1
−0.1
±2
±2.5
−100
10
10
5
25
20
10
2
10
0.5
30
4
±16
±1
±4
±0.5
±1
±0.25
10
±10
±1
±1.5
VDD
Bits
LSB
LSB
Bits
LSB
LSB
Bits
LSB
LSB
mV
mV
% of FSR
% of FSR
μV/°C
ppm
dB
μV
μV/mA
μV
μV
μV/mA
μV
V
nF
nF
Ω
mA
μs
Conditions/Comments
Guaranteed monotonic by design
Guaranteed monotonic by design
Guaranteed monotonic by design
All zeroes loaded to DAC register
All ones loaded to DAC register
Of FSR/°C
DAC code = midscale ; VDD = 5 V ± 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)
Due to full-scale output change,
RL = 2 kΩ to GND or VDD
Due to load current change
Due to powering down (per channel)
RL = ∞
RL = 2 kΩ
VDD = 5 V
Coming out of power-down mode; VDD = 5 V
Reference Current
Reference Input Range
Reference Input Impedance
REFERENCE OUTPUT
Output Voltage
Reference TC3
Output Impedance
0.75
2.495
170
26
±5
±10
7.5
200
VDD
2.505
±10
μA
V
V
ppm/°C
ppm/°C
VREF = VDD = 5.5 V
At ambient
MSOP package models
LFCSP package models
Rev. A | Page 3 of 28
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