AD5662BRM-1 Analog Devices Inc, AD5662BRM-1 Datasheet

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AD5662BRM-1

Manufacturer Part Number
AD5662BRM-1
Description
IC,D/A CONVERTER,SINGLE,16-BIT,CMOS,TSSOP,8PIN
Manufacturer
Analog Devices Inc
Series
nanoDAC™r
Datasheet

Specifications of AD5662BRM-1

Design Resources
4 mA to 20 mA Process Control Loop Using AD5662 (CN0009) 16-Bit Fully Isolated Voltage Output Module Using AD5662, ADuM1401, and External Amplifiers (CN0063) 16-Bit Fully Isolated 4 mA to 20 mA Output Module Using AD5662, ADuM1401, and External Amplifiers (CN0064)
Settling Time
8µs
Number Of Bits
16
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Voltage Supply Source
Single Supply
Power Dissipation (max)
750µW
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
FEATURES
Low power (250 μA @ 5 V) single 16-bit nanoDAC
12-bit accuracy guaranteed
Tiny 8-lead SOT-23/MSOP package
Power-down to 480 nA @ 5 V, 100 nA @ 3 V
Power-on reset to zero scale/midscale
2.7 V to 5.5 V power supply
Guaranteed 16-bit monotonic by design
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
SYNC interrupt facility
Temperature range −40°C to +125°C
Qualified for automotive applications
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 AD5662, a member of the nanoDAC family, is a low power,
single, 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 AD5662 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
(AD5662x-1) or to midscale (AD5662x-2), 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 0.75 mW at 5 V, going down to
2.4 μW in power-down mode.
The AD5662’s on-chip precision output amplifier allows rail-to-
rail output swing to be achieved. For remote sensing applications,
the output amplifier’s inverting input is available to the user.
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. Trademarks and
registered trademarks are the property of their respective owners.
2.7 V to 5.5 V, 250 μA, Rail-to-Rail Output
The AD5662 uses a versatile 3-wire serial interface that operates
at clock rates up to 30 MHz, and is compatible with standard
SPI®, QSPI™, MICROWIRE™, and DSP interface standards.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
RELATED DEVICES
Part No.
AD5620/AD5640/AD5660
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
SYNC
16-Bit nanoDAC
16-bit DAC—12-bit accuracy guaranteed.
Available in 8-lead SOT-23 and 8-lead MSOP packages.
Low power. Typically consumes 0.42 mW at 3 V and
0.75 mW at 5 V.
Power-on reset to zero scale or to midscale.
10 μs max settling time.
CONTROL
POWER-ON
REGISTER
LOGIC
INPUT
RESET
SCLK
DAC
FUNCTIONAL BLOCK DIAGRAM
DIN
©2005–2010 Analog Devices, Inc. All rights reserved.
REF(+)
V
REF
16-BIT
DAC
CONTROL LOGIC
POWER-DOWN
GND
Figure 1.
Description
3 V/5 V 12-/14-/16-bit DAC with
internal reference in SOT-23
V
DD
OUTPUT
BUFFER
TM
in a SOT-23
AD5662
www.analog.com
AD5662
RESISTOR
NETWORK
V
V
FB
OUT

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AD5662BRM-1 Summary of contents

Page 1

FEATURES Low power (250 μ single 16-bit nanoDAC 12-bit accuracy guaranteed Tiny 8-lead SOT-23/MSOP package Power-down to 480 100 Power-on reset to zero scale/midscale 2 5.5 V ...

Page 2

AD5662 TABLE OF CONTENTS Specifications..................................................................................... 3 Timing Characteristics..................................................................... 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Description .............................. 7 Typical Performance Characteristics ............................................. 8 Terminology .................................................................................... 13 Theory of Operation ...................................................................... 14 DAC Section................................................................................ 14 Resistor ...

Page 3

SPECIFICATIONS kΩ to GND Table 1. Parameter 2 STATIC PERFORMANCE Resolution Relative Accuracy Differential Nonlinearity Zero Code Error Full-Scale Error Offset Error Gain Error Zero Code Error ...

Page 4

AD5662 Parameter POWER REQUIREMENTS (Normal Mode (All Power-Down Modes 4 5 ...

Page 5

TIMING CHARACTERISTICS All input signals are specified with ns/V (10 5.5 V; all specifications T DD Table 2. Limit at T Parameter V = 2.7 V ...

Page 6

AD5662 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND OUT V to GND GND REF Digital Input Voltage to GND Operating Temperature Range Industrial (Y ...

Page 7

PIN CONFIGURATION AND FUNCTION DESCRIPTION Table 4. Pin Function Descriptions Pin No. Mnemonic Function 1 V Power Supply Input. These parts can be operated from 2 5 Reference Voltage Input. REF 3 V ...

Page 8

AD5662 TYPICAL PERFORMANCE CHARACTERISTICS REF 25° –2 –4 –6 –8 – 10k 15k 20k 25k 30k 35k 40k 45k 50k 55k 60k 65k ...

Page 9

–0.22 –0.04 GAIN ERROR –0.06 –0.08 –0.01 –0.12 –0.14 FULL-SCALE ERROR –0.16 –0.18 –0.20 –40 – TEMPERATURE ( ° C) Figure 10. Gain Error and Full-Scale Error vs. Temperature 1.5 ...

Page 10

AD5662 250 T = 25° 200 150 100 50 0 512 10512 20512 30512 40512 CODE Figure 16. Supply Current vs. Code 160 V =5V DD 140 120 ...

Page 11

25° OUT CH1 2.0V CH2 500mV M100μs 125MS/s A CH1 1.28V Figure 22. Power-On Reset 25° ...

Page 12

AD5662 – 25°C A –30 DAC LOADED WITH FULL SCALE = 2V ± 0.3Vp-p V REF –40 –50 –60 –70 –80 –90 –100 Figure 28. Total Harmonic Distortion 16 V ...

Page 13

TERMINOLOGY Relative Accuracy or Integral Nonlinearity (INL) For the DAC, relative accuracy or integral nonlinearity is a measurement of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the DAC transfer function. A typical INL ...

Page 14

AD5662 THEORY OF OPERATION DAC SECTION The AD5662 DAC is fabricated on a CMOS process. The architecture consists of a string DAC followed by an output buffer amplifier. Figure 32 shows a block diagram of the DAC architecture ...

Page 15

INPUT SHIFT REGISTER The input shift register is 24 bits wide (see Figure 34). The first six bits are don’t cares. The next two are control bits that control the part’s mode of operation (normal mode or any one of ...

Page 16

AD5662 POWER-DOWN MODES The AD5662 contains four separate modes of operation. These modes are software-programmable by setting two bits (DB17 and DB16) in the control register. Table 5 shows how the state of the bits corresponds to the device’s mode ...

Page 17

AD5662 to 80C51/80L51 Interface Figure 39 shows a serial interface between the AD5662 and the 80C51/80L51 microcontroller. The setup for the interface is as follows. TxD of the 80C51/80L51 drives SCLK of the AD5662, while RxD drives the serial data ...

Page 18

AD5662 APPLICATIONS CHOOSING A REFERENCE FOR THE AD5662 To achieve the optimum performance from the AD5662, thought should be given to the choice of a precision voltage reference. The AD5662 has only one reference input, V voltage on the reference ...

Page 19

BIPOLAR OPERATION USING THE AD5662 The AD5662 has been designed for single-supply operation, but a bipolar output range is also possible using the circuit in Figure 42. The circuit gives an output voltage range of ±5 V. Rail-to-rail operation at ...

Page 20

AD5662 USING AD5662 WITH A GALVANICALLY ISOLATED INTERFACE In process-control applications in industrial environments often necessary to use a galvanically isolated interface to protect and isolate the controlling circuitry from any hazardous common-mode voltages that might occur in ...

Page 21

OUTLINE DIMENSIONS INDICATOR 0.15 MAX 2.90 BSC 1.60 BSC 2.80 BSC PIN 1 0.65 BSC 1.95 1.30 BSC 1.15 0.90 1.45 MAX 0.22 0.08 0.38 SEATING 0.22 PLANE COMPLIANT TO JEDEC STANDARDS ...

Page 22

... AD5662BRJ-2REEL7 −40°C to +125°C AD5662BRJZ-2REEL7 −40°C to +125°C AD5662BRM-1 −40°C to +125°C AD5662BRMZ-1 −40°C to +125°C AD5662BRM-1REEL7 −40°C to +125°C AD5662BRMZ-1REEL7 −40°C to +125°C AD5662WARMZ-1REEL7 −40°C to +125°C EVAL-AD5662EBZ RoHS Compliant Part. ...

Page 23

NOTES Rev Page AD5662 ...

Page 24

AD5662 NOTES ©2005–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04777–0–12/10(A) Rev Page ...

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