EVAL-AD5620EB AD [Analog Devices], EVAL-AD5620EB Datasheet

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EVAL-AD5620EB

Manufacturer Part Number
EVAL-AD5620EB
Description
Single, 12-/14-/16-Bit nanoDAC with 5 ppm/C On-Chip Reference in SOT-23
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
Low power, single nanoDACs
12-bit accuracy guaranteed
On-chip, 1.25 V/2.5 V, 5 ppm/°C reference
Tiny 8-lead SOT-23/MSOP packages
Power-down to 480 nA @ 5 V, 200 nA @ 3 V
3 V/5 V single power supply
Guaranteed 16-bit monotonic by design
Power-on reset to zero/midscale
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
SYNC interrupt facility
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
RELATED DEVICE
Part No.
AD5662
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.
AD5660: 16 bits
AD5640: 14 bits
AD5620: 12 bits
12-/14-/16-bit nanoDAC—12-bit accuracy guaranteed.
On-chip, 1.25 V/2.5 V, 5 ppm/°C reference.
Available in 8-lead SOT-23 and 8-lead MSOP packages.
Power-on reset to 0 V or midscale.
10 μs settling time.
Description
2.7 V to 5.5 V, 16-bit DAC in SOT-23, external
reference
5 ppm/°C On-Chip Reference in SOT-23
Single, 12-/14-/16-Bit nanoDAC™ with
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The AD5620/AD5640/AD5660, members of the nanoDAC
family of devices, are low power, single, 12-/14-/16-bit, buffered
voltage-out DACs and are guaranteed monotonic by design.
The AD5620/AD5640/AD5660-1 parts include an internal,
1.25 V, 5 ppm/°C reference, giving a full-scale output voltage
range of 2.5 V. The AD5620/AD5640/AD5660-2-3 parts include
an internal, 2.5 V, 5 ppm/°C reference, giving a full-scale output
voltage range of 5 V. The reference associated with each part is
available at the V
The parts incorporate a power-on reset circuit to ensure that the
DAC output powers up to 0 V (AD5620/AD5640/AD5660-1-2)
or midscale (AD5620-3 and AD5660-3) 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 power consumption is
2.5 mW at 5 V, reducing to 1 μW in power-down mode.
The AD5620/AD5640/AD5660 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. The AD5620/AD5640/AD5660 use
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.
SYNC
CONTROL
POWER-ON
REGISTER
LOGIC
INPUT
RESET
SCLK
DAC
AD5620/AD5640/AD5660
FUNCTIONAL BLOCK DIAGRAM
DIN
REFOUT
V
REFOUT
REF(+)
16-BIT
DAC
1.25/2.5V
© 2005 Analog Devices, Inc. All rights reserved.
pin.
CONTROL LOGIC
POWER-DOWN
REF
GND
Figure 1.
AD5620/AD5640/AD5660
V
DD
OUTPUT
BUFFER
www.analog.com
RESISTOR
NETWORK
V
V
FB
OUT

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EVAL-AD5620EB Summary of contents

Page 1

FEATURES Low power, single nanoDACs AD5660: 16 bits AD5640: 14 bits AD5620: 12 bits 12-bit accuracy guaranteed On-chip, 1.25 V/2 ppm/°C reference Tiny 8-lead SOT-23/MSOP packages Power-down to 480 200 ...

Page 2

AD5620/AD5640/AD5660 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Product Highlights ........................................................................... 1 Related Device................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AD5620/AD5640/AD5660-2-3 .................................................. 3 AD5620/AD5640/AD5660-1 ...................................................... 5 Timing Characteristics ................................................................ ...

Page 3

SPECIFICATIONS AD5620/AD5640/AD5660 kΩ to GND Table 1. Parameter STATIC PERFORMANCE 2 AD5660 Resolution Relative Accuracy Differential Nonlinearity AD5640 Resolution Relative Accuracy Differential Nonlinearity AD5620 Resolution Relative Accuracy ...

Page 4

AD5620/AD5640/AD5660 Parameter 3 LOGIC INPUTS Input Current V , Input Low Voltage INL V , Input High Voltage INH Pin Capacitance POWER REQUIREMENTS (Normal Mode 4 5 4.5 ...

Page 5

AD5620/AD5640/AD5660 2 3 kΩ to GND Table 2. Parameter 3 STATIC PERFORMANCE AD5660 Resolution Relative Accuracy Differential Nonlinearity AD5640 Resolution Relative Accuracy Differential Nonlinearity AD5620 Resolution Relative Accuracy ...

Page 6

AD5620/AD5640/AD5660 Parameter 4 LOGIC INPUTS Input Current V , Input Low Voltage INL V , Input High Voltage INH Pin Capacitance POWER REQUIREMENTS (Normal Mode 2 3 2.7 ...

Page 7

TIMING CHARACTERISTICS All input signals are specified with ns/V (10 5.5 V; all specifications T DD Table 3. Limit at T Parameter V = 2.7 V ...

Page 8

AD5620/AD5640/AD5660 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND OUT V to GND GND REFOUT Digital Input Voltage to GND Operating Temperature Range Industrial Storage ...

Page 9

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS V AD5620 AD5640 REFOUT AD5660 TOP VIEW (Not to Scale OUT Figure 3. SOT-23 Pin Configuration Table 5. Pin Function Descriptions Pin ...

Page 10

AD5620/AD5640/AD5660 TYPICAL PERFORMANCE CHARACTERISTICS 2.5V REFOUT T = 25° –2 –4 –6 –8 –10 CODE Figure 5. INL—AD5660-2/AD5660 2.5V REFOUT ...

Page 11

1.25V REFOUT T = 25° –2 –4 –6 –8 –10 CODE Figure 11. INL—AD5660 1.25V REFOUT 25°C ...

Page 12

AD5620/AD5640/AD5660 10 MAX INL MAX DNL 0 MIN DNL –2 –4 –6 –8 MIN INL –10 – TEMPERATURE (°C) Figure 17. INL Error and DNL Error vs. Temperature 0.5 ...

Page 13

1.25V REFOUT T = 25°C A 3.00 FULL SCALE 3/4 SCALE 2.00 MIDSCALE 1.00 1/4 SCALE 0 ZERO SCALE –1.00 –30 –20 – CURRENT (mA) Figure 23. Source and Sink Capability—AD5660-1 ...

Page 14

AD5620/AD5640/AD5660 REF V OUT 3 CH1 1.20V CH2 1.00V M100μs CH3 100mV Figure 29. Power-On Reset to 0 V—AD5660-1 SCLK 1 3 CH1 2.00V M1.00μs CH3 50.0mV Figure 30. Exiting Power-Down to Midscale 2.501250 2.501000 ...

Page 15

2.5V REFOUT T = 25°C A DAC LOADED WITH MIDSCALE 1 5s/DIV Figure 35. 0 Output Noise—AD5660-2/AD5660 1.25V REFOUT T = 25°C A DAC ...

Page 16

AD5620/AD5640/AD5660 TERMINOLOGY Relative Accuracy For the DAC, relative accuracy, or integral nonlinearity (INL measurement of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the DAC transfer function. Figure 5 through Figure 7 ...

Page 17

THEORY OF OPERATION D/A SECTION The AD5620/AD5640/AD5660 DACs are fabricated on a CMOS process. The architecture consists of a string DAC followed by an output buffer amplifier. The parts include an internal 1.25 V/2 ppm/°C reference that is ...

Page 18

AD5620/AD5640/AD5660 INPUT SHIFT REGISTER AD5620/AD5640 The input shift register is 16 bits wide for the AD5620/AD5640 (see Figure 40 and Figure 41). The first two bits are control bits that control which mode of operation the part is in (normal ...

Page 19

POWER-ON RESET The AD5620/AD5640/AD5660 family contains a power-on reset circuit that controls the output voltage during power-up. The AD5620/AD5640/AD5660-1-2 DAC output powers and the AD5620/AD5660-3 DAC output powers up to midscale. The output remains at this ...

Page 20

AD5620/AD5640/AD5660 AD5660-to-68HC11/68L11 Interface Figure 46 shows a serial interface between the AD5660 and the 68HC11/68L11 microcontroller. SCK of 68HC11/68L11 drives the SCLK of AD5660, and the MOSI output drives the serial data line of the DAC. The SYNC signal is ...

Page 21

APPLICATIONS USING AN REF19x AS A POWER SUPPLY FOR THE AD5620/AD5640/AD5660 Because the supply current required by the AD5620/AD5640/ AD5660 is extremely low, an alternative option is to use a REF19x voltage reference (REF195 for REF193 for ...

Page 22

AD5620/AD5640/AD5660 of the AD8627 and possible latch-up of the controller. The loop supply voltage compliance of the circuit is limited by the maximum applied input voltage to the ADR02 and is from ADR02 R2 18.5kΩ ...

Page 23

... AD5620BRJ-2REEL7 −15°C to +105°C AD5620CRM-1 −15°C to +105°C AD5620CRM-1REEL7 −15°C to +105°C AD5620CRM-2 −15°C to +105°C AD5620CRM-2REEL7 −15°C to +105°C AD5620CRM-3 −15°C to +105°C AD5620CRM-3REEL7 −15°C to +105°C EVAL-AD5620EB 0.95 0.85 0.75 0.22 0.08 0.60 8° 0.45 4° 0.30 0° Package Package ...

Page 24

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