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AD5667R Datasheet PDF Download - Analog Devices

Номер произв AD5667R
Описание Dual 12-/14-/16-Bit nanoDACs
Производители Analog Devices
логотип Analog Devices логотип 
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AD5667R Даташит, Описание, Даташиты
Dual, 12-/14-/16-Bit nanoDACs® with
5 ppm/°C On-Chip Reference, I2C® Interface
AD5627R/AD5647R/AD5667R, AD5627/AD5667
FEATURES
Low power, smallest pin-compatible, dual nanoDACs
AD5627R/AD5647R/AD5667R
12-/14-/16-bit
On-chip 1.25 V/2.5 V, 5 ppm/°C reference
AD5627/AD5667
12-/16-bit
External reference only
3 mm x 3 mm LFCSP and 10-lead MSOP
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to zero scale
Per channel power-down
Hardware LDAC and CLR functions
I2C-compatible serial interface supports standard (100 kHz),
fast (400 kHz), and high speed (3.4 MHz) modes
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 AD5627R/AD5647R/AD5667R, AD5627/AD5667
members of the nanoDAC family are low power, dual, 12-, 14-,
16-bit buffered voltage-out DACs with/without on-chip
reference. All devices operate from a single 2.7 V to 5.5 V
supply, are guaranteed monotonic by design, and have an I2C-
compatible serial interface.
The AD5627R/AD5647R/AD5667R have an on-chip reference.
The AD56x7RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a
full-scale output range of 2.5 V; the AD56x7RBRMZ have 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. The internal reference is enabled via a
software write. The AD5667 and AD5627 require an external
reference voltage to set the output range of the DAC.
The AD56x7R/AD56x7 incorporate 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
ADDR
SCL
SDA
FUNCTIONAL BLOCK DIAGRAMS
VDD
GND
VREFIN/VREFOUT
AD5627R/AD5647R/AD5667R
INPUT
REGISTER
DAC
REGISTER
1.25V/2.5V REF
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
VOUTA
VOUTB
POWER-ON
RESET
POWER-DOWN
LOGIC
ADDR
SCL
SDA
LDAC CLR
Figure 1. AD5627R/AD5647R/AD5667R
VDD
GND
VREFIN
AD5627/AD5667
INPUT
REGISTER
DAC
REGISTER
STRING
DAC A
BUFFER
INPUT
REGISTER
DAC
REGISTER
STRING
DAC B
BUFFER
POWER-ON
RESET
POWER-DOWN
LOGIC
VOUTA
VOUTB
LDAC CLR
Figure 2. AD5627/AD5667
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 on-chip precision output amplifier enables rail-to-rail
output swing.
The AD56x7R/AD56x7 use a 2-wire I2C-compatible serial
interface that operates in standard (100 kHz), fast (400 kHz),
and high speed (3.4 MHz) modes.
Table 1. Related Devices
Part No.
AD5663
AD5623R/AD5643R/AD5663R
AD5625R/AD5645R/AD5665R,
AD5625/AD5665
Description
2.7 V to 5.5 V, dual 16-bit DAC,
external reference, SPI® interface
2.7 V to 5.5 V, dual 12-, 14-, 16-bit
DACs, internal reference,
SPI interface
2.7 V to 5.5 V, quad 12-, 14-, 16-bit
DACs, with/without internal
reference, I2C interface
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
©2007 Analog Devices, Inc. All rights reserved.
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AD5667R Даташит, Описание, Даташиты
AD5627R/AD5647R/AD5667R, AD5627/AD5667
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagrams............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AC Characteristics........................................................................ 5
I2C Timing Specifications............................................................ 6
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
Internal reference........................................................................ 20
External reference....................................................................... 20
Serial Interface ............................................................................ 21
Write Operation.......................................................................... 21
Read Operation........................................................................... 21
High Speed Mode....................................................................... 21
Input Shift Register .................................................................... 23
Multiple Byte Operation............................................................ 23
Broadcast Mode.......................................................................... 23
LDAC Function .......................................................................... 23
Power-Down Modes .................................................................. 25
Power-On Reset and Software Reset ....................................... 26
Clear Pin (CLR) .......................................................................... 26
Internal Reference Setup (R Versions) .................................... 26
Application Information................................................................ 27
Using a Reference as a Power Supply for the
AD56x7R/AD56x7 ..................................................................... 27
Bipolar Operation Using the AD56x7R/AD56x7 .................. 27
Power Supply Bypassing and Grounding................................ 27
Outline Dimensions ....................................................................... 28
Ordering Guide .......................................................................... 29
REVISION HISTORY
1/07—Revision 0: Initial Version
Rev. 0 | Page 2 of 32
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AD5667R Даташит, Описание, Даташиты
AD5627R/AD5647R/AD5667R, AD5627/AD5667
SPECIFICATIONS
VDD = 2.7 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
AD5667R/AD5667
Resolution
Relative Accuracy
Differential Nonlinearity
AD5647R
Resolution
Relative Accuracy
Differential Nonlinearity
AD5627R/AD5627
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
Reference Current
Reference Input Range
Reference Input Impedance
REFERENCE OUTPUT
(LFCSP_WD PACKAGE)
Output Voltage
Reference TC3
Output Impedance
REFERENCE OUTPUT (MSOP PACKAGE)
Output Voltage
Reference TC3
Output Impedance
0
0.75
1.247
2.495
Typ Max
±8 ±12
±1
±2 ±4
±0.5
±0.5
2
±1
−0.1
±2
±2.5
−100
15
±1
±0.25
10
±10
±1
±1.5
10
8
25
20
10
VDD
2
10
0.5
30
4
110 130
VDD
50
1.253
±10
7.5
2.505
±5 ±10
7.5
Unit Conditions/Comments1
Bits
LSB
LSB Guaranteed monotonic by design
Bits
LSB
LSB Guaranteed monotonic by design
Bits
LSB
LSB
mV
mV
% of FSR
% of FSR
μV/°C
ppm
dB
μV
μV/mA
μV
μV
μV/mA
μV
Guaranteed monotonic by design
All 0s loaded to DAC register
All 1s 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 2 kΩ to VDD
Due to load current change
Due to powering down (per channel)
Due to full-scale output change,
RL = 2 kΩ to GND or 2 kΩ to VDD
Due to load current change
Due to powering down (per channel)
V
nF RL = ∞
nF RL = 2 kΩ
Ω
mA VDD = 5 V
μs Coming out of power-down mode; VDD = 5 V
μA VREF = VDD = 5.5 V
V
V
ppm/°C
At ambient
V
ppm/°C
At ambient
Rev. 0 | Page 3 of 32
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