Data Sheet
FEATURES
Low power, single
nanoDACs
AD5660: 16 bits
AD5640: 14 bits
AD5620: 12 bits
12-bit accuracy guaranteed
On-chip, 1.25 V/2.5 V, 5 ppm/°C reference
Tiny 8-lead SOT-23, MSOP, and LFCSP 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
Single, 12-/14-/16-Bit
nanoDAC
with
5 ppm/°C On-Chip Reference in SOT-23
AD5620/AD5640/AD5660
FUNCTIONAL BLOCK DIAGRAM
V
REFOUT
GND
V
DD
1.25/2.5V
REF
POWER-ON
RESET
AD5620/AD5640/AD5660
V
FB
DAC
REGISTER
REF(+)
16-BIT
DAC
OUTPUT
BUFFER
V
OUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
04539-001
SYNC
SCLK
DIN
Figure 1.
GENERAL DESCRIPTION
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
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
REFOUT
pin.
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.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
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, MSOP, and LFCSP packages.
Power-on reset to 0 V or midscale.
10 µs settling time.
Table 1. Related Device
Part No.
AD5662
Description
2.7 V to 5.5 V, 16-bit DAC in SOT-23, LFCSP, and
MSOP, external reference
Rev. G
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AD5620/AD5640/AD5660
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Product Highlights ........................................................................... 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 ................................................................ 7
Absolute Maximum Ratings ............................................................ 8
ESD Caution .................................................................................. 8
Pin Configurations and Function Descriptions ........................... 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 16
Theory of Operation ...................................................................... 17
D/A Section ................................................................................. 17
Resistor String ............................................................................. 17
Data Sheet
Internal Reference ...................................................................... 17
Output Amplifier ........................................................................ 17
Serial Interface ............................................................................ 17
Input Shift Register .................................................................... 18
SYNC Interrupt .......................................................................... 18
Power-On Reset .......................................................................... 19
Power-Down Modes .................................................................. 19
Microprocessor Interfacing ....................................................... 19
Applications Information .............................................................. 21
Using a REF19x as a Power Supply for the
AD5620/AD5640/AD5660 ....................................................... 21
Bipolar Operation Using the AD5660 ..................................... 21
Using the AD5660 as an Isolated, Programmable, 4 mA to
20 mA Process Controller ......................................................... 22
Using the AD5620/AD5640/AD5660 with a Galvanically
Isolated Interface ........................................................................ 22
Power Supply Bypassing and Grounding ................................ 23
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 26
REVISION HISTORY
8/13—Rev.
F to Rev. G
Added LFCSP (Throughout)........................................................... 1
Added Thermal Impedance for LFCSP; Table 5........................... 8
Added Figure 5; Renumbered Sequentially .................................. 9
Updated Outline Dimensions ....................................................... 24
Changes to Ordering Guide .......................................................... 26
12/10—Rev. E to Rev. F
Changes to Ordering Guide .......................................................... 25
7/10—Rev. D to Rev. E
Moved Using the AD5660 as an Isolated, Programmable, 4 mA
to 20 mA Process Controller Section ........................................... 22
Moved Power Supply Bypassing and Grounding Section ......... 23
Changes to Ordering Guide .......................................................... 25
3/10—Rev. C to Rev. D
Changes to Ordering Guide .......................................................... 24
Rev. G | Page 2 of 28
10/09—Rev. B to Rev. C
Changes to Ordering Guide .......................................................... 23
5/06—Rev. A to Rev. B
Updated Formatted ............................................................ Universal
Updated Temperature Range ............................................ Universal
Changes to Table 2.............................................................................3
Changes to Table 5.............................................................................8
Replaced Figure 17, Figure 18, and Figure 19............................. 12
Changes to Ordering Guides .................................................. 23, 24
9/05—Rev. 0 to Rev. A
Changes to Specifications .................................................................5
Changes to Outline Dimensions .................................................. 23
7/05—Revision 0: Initial Version
Data Sheet
SPECIFICATIONS
AD5620/AD5640/AD5660-2-3
AD5620/AD5640/AD5660
V
DD
= 4.5 V to 5.5 V, R
L
= 2 kΩ to GND, C
L
= 200 pF to GND, C
REFOUT
= 100 nF; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
STATIC PERFORMANCE
2
AD5660
Resolution
Relative Accuracy
Differential Nonlinearity
AD5640
Resolution
Relative Accuracy
Differential Nonlinearity
AD5620
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
OUTPUT CHARACTERISTICS
3
Output Voltage Range
Output Voltage Settling Time
Slew Rate
Capacitive Load Stability
Output Noise Spectral Density
Output Noise (0.1 Hz to 10 Hz)
Digital-to-Analog Glitch Impulse
Digital Feedthrough
DC Output Impedance
Short-Circuit Current
Power-Up Time
REFERENCE OUTPUT
Output Voltage
Reference TC
3
Output Impedance
A Grade
1
B Grade
1
C Grade
1
Unit
Conditions/Comments
16
±32
±1
14
±8
±0.5
12
±6
±0.25
2
10
±10
−0.15
±1
±1.5
±2
±2.5
−75
0
V
DD
8
10
1.5
2
10
80
45
5
0.1
0.5
30
5
2.495
2.505
±10
7.5
16
±16
±1
14
±4
±0.5
12
±1
±0.25
2
10
±10
−0.15
±1
±1.5
±2
±2.5
−75
0
V
DD
8
10
1.5
2
10
80
45
5
0.1
0.5
30
5
2.495
2.505
±10
7.5
16
±16
±1
14
±4
±0.5
12
±1
±0.25
2
10
±10
−0.15
±1
±1.5
±2
±2.5
−75
0
V
DD
8
10
1.5
2
10
80
45
5
0.1
0.5
30
5
2.495
2.505
±5
±10
7.5
Bits min
LSB max
LSB max
Bits min
LSB max
LSB max
Bits min
LSB max
LSB max
mV typ
mV max
mV max
% FSR typ
% FSR max
% FSR max
µV/°C typ
ppm typ
dB typ
V min
V max
µs typ
µs max
V/µs typ
nF typ
nF typ
nV/√Hz typ
µV p-p typ
nV-s typ
nV-s typ
Ω typ
mA typ
µs typ
V min
V max
ppm/°C typ
ppm/°C max
kΩ typ
Guaranteed monotonic by design
Guaranteed monotonic by design
Guaranteed monotonic by design
All 0s loaded to DAC register
All 1s loaded to DAC register
Of FSR/°C
DAC code = midscale; V
DD
= 5 V ± 10%
¼ to ¾ scale change settling to ±2 LSB
R
L
= 2 kΩ; 0 pF < C
L
< 200 pF
¼ to ¾ scale
R
L
= ∞
R
L
= 2 kΩ
DAC code = midscale, 10 kHz
DAC code = midscale
1 LSB change around major carry
V
DD
= 5 V
Coming out of power-down mode; V
DD
= 5 V
At ambient
Rev. G | Page 3 of 28
AD5620/AD5640/AD5660
Parameter
LOGIC INPUTS
3
Input Current
V
INL
, Input Low Voltage
V
INH
, Input High Voltage
Pin Capacitance
POWER REQUIREMENTS
V
DD
I
DD
(Normal Mode)
V
DD
= 4.5 V to 5.5 V
V
DD
= 4.5 V to 5.5 V
I
DD
(All Power-Down Modes)
V
DD
= 4.5 V to 5.5 V
V
DD
= 4.5 V to 5.5 V
1
2
Data Sheet
A Grade
1
±2
0.8
2
3
4.5
5.5
0.55
1
0.48
1
B Grade
1
±2
0.8
2
3
4.5
5.5
0.55
1
0.48
1
C Grade
1
±2
0.8
2
3
4.5
5.5
0.55
1
0.48
1
Unit
µA max
V max
V min
pF typ
V min
V max
mA typ
mA max
µA typ
µA max
Conditions/Comments
All digital inputs
V
DD
= 5 V
V
DD
= 5 V
All digital inputs at 0 V or V
DD
DAC active and excluding load current
V
IH
= V
DD
and V
IL
= GND
V
IH
= V
DD
and V
IL
= GND
V
IH
= V
DD
and V
IL
= GND
V
IH
= V
DD
and V
IL
= GND
Temperature range is −40°C to +105°C, typical at +25°C.
Linearity calculated using a reduced code range: AD5660 (Code 511 to Code 65024); AD5640 (Code 128 to Code 16256); AD5620 (Code 32 to Code 4064). Output
unloaded. Linearity tested with V
DD
= 5.5 V. If part is operated with a V
DD
< 5 V, the output is clamped to V
DD.
3
Guaranteed by design and characterization; not production tested.
Rev. G | Page 4 of 28
Data Sheet
AD5620/AD5640/AD5660-1
AD5620/AD5640/AD5660
V
DD 1
= 2.7 V to 3.3 V, R
L
= 2 kΩ to GND, C
L
= 200 pF to GND, C
REFOUT
= 100 nF; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
Parameter
STATIC PERFORMANCE
3
AD5660
Resolution
Relative Accuracy
Differential Nonlinearity
AD5640
Resolution
Relative Accuracy
Differential Nonlinearity
AD5620
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
OUTPUT CHARACTERISTICS
4
Output Voltage Range
Output Voltage Settling Time
Slew Rate
Capacitive Load Stability
Output Noise Spectral Density
Output Noise (0.1 Hz to 10 Hz)
Digital-to-Analog Glitch Impulse
Digital Feedthrough
DC Output Impedance
Short-Circuit Current
Power-Up Time
REFERENCE OUTPUT
Output Voltage
Reference TC
4
Output Impedance
A Grade
2
B Grade
2
C Grade
2
Unit
Conditions/Comments
16
±32
±1
14
±8
±0.5
12
±6
±0.25
2
8
±9
±0.15
±0.85
±0.85
±2
±2.5
−60
0
V
DD
8
10
1.5
2
10
80
20
5
0.1
0.5
30
6
1.247
1.253
±10
7.5
16
±16
±1
14
±4
±0.5
12
±1
±0.25
2
8
±9
±0.15
±0.85
±0.85
±2
±2.5
−60
0
V
DD
8
10
1.5
2
10
80
20
5
0.1
0.5
30
6
1.247
1.253
±10
7.5
16
±16
±1
14
±4
±0.5
12
±1
±0.25
2
8
±9
±0.15
±0.85
±0.85
±2
±2.5
−60
Bits min
LSB max
LSB max
Bits min
LSB max
LSB max
Bits min
LSB max
LSB max
mV typ
mV max
mV max
% FSR typ
% FSR max
% FSR max
µV/°C typ
ppm typ
dB typ
V min
V max
µs typ
µs max
V/µs typ
nF typ
nF typ
nV/√Hz typ
µV p-p typ
nV-s typ
nV-s typ
Ω typ
mA typ
µs typ
V min
V max
ppm/°C typ
ppm/°C max
kΩ typ
Guaranteed monotonic by design
Guaranteed monotonic by design
Guaranteed monotonic by design
All 0s loaded to DAC register
All 1s loaded to DAC register
Of FSR/°C
DAC code = midscale; V
DD
= 3 V ± 10%
V
DD
8
10
1.5
2
10
80
20
5
0.1
0.5
30
6
1.247
1.253
±5
±15
7.5
¼ to ¾ scale change settling to ±2 LSB
R
L
= 2 kΩ; 0 pF < C
L
< 200 pF
¼ to ¾ scale
R
L
= ∞
R
L
= 2 kΩ
DAC code = midscale, 10 kHz
DAC code = midscale
1 LSB change around major carry
V
DD
= 3 V
Coming out of power-down mode; V
DD
= 3 V
At ambient
Rev. G | Page 5 of 28
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