Burr Brown Products
from Texas Instruments
DA
C8
56
DAC8560
0
SLAS464 – DECEMBER 2006
16-Bit, Ultra-Low Glitch, Voltage Output
DIGITAL-TO-ANALOG CONVERTER
with 2.5V, 2ppm/°C Internal Reference
FEATURES
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•
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Relative Accuracy: 4LSB
Glitch Energy: 0.15nV-s
MicroPower
Operation: 510µA at 2.7V
Internal Reference:
•
2.5V Reference Voltage (enabled by default)
•
0.02% Initial Accuracy
•
2ppm/°C Temperature Drift (typ)
•
5ppm/°C Temperature Drift (max)
•
20mA Sink/Source Capability
Power-On Reset to Zero
Power Supply: +2.7V to +5.5V
16-Bit Monotonic Over Temperature Range
Settling Time: 10µs to
±0.003%
FSR
Low-Power Serial Interface with
Schmitt-Triggered Inputs
On-Chip Output Buffer Amplifier with
Rail-to-Rail Operation
Power-Down Capability
Drop-In Compatible With
DAC8531/01
and
DAC8550/51
Temperature Range: –40°C to +105°C
Available in a Tiny MSOP-8 Package
DESCRIPTION
The DAC8560 is a low-power, voltage output, 16-bit
digital-to-analog converter (DAC). The DAC8560
includes a 2.5V, 2ppm/°C internal reference (enabled
by default), giving a full-scale output voltage range of
2.5V. The internal reference has an initial accuracy
of 0.02% and can source up to 20mA at the V
REF
pin.
The device is monotonic, provides very good
linearity, and minimizes undesired code-to-code
transient voltages (glitch). The DAC8560 uses a
versatile 3-wire serial interface that operates at clock
rates up to 30MHz. It is compatible with standard
SPI™, QSPI™, Microwire™, and digital signal
processor (DSP) interfaces.
The DAC8560 incorporates a power-on-reset circuit
that ensures the DAC output powers up at zero-scale
and remains there until a valid code is written to the
device. The DAC8560 contains a power-down
feature, accessed over the serial interface, that
reduces the current consumption of the device to
1.2µA at 5V.
The low-power consumption, internal reference, and
small footprint make this device ideal for portable,
battery-operated equipment. The power consumption
is 2.6mW at 5V, reducing to 6µW in power-down
mode.
The DAC8560 is available in an MSOP-8 package.
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APPLICATIONS
•
•
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Process Control
Data Acquisition Systems
Closed-Loop Servo-Control
PC Peripherals
Portable Instrumentation
FUNCTIONAL BLOCK DIAGRAM
V
DD
V
FB
V
REF
2.5V
Reference
Ref (+)
16-Bit DAC
16
DAC Register
16
SYNC
SCLK
D
IN
GND
Shift Register
PWD
Control
Resistor
Network
V
OUT
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
DAC8560
www.ti.com
SLAS464 – DECEMBER 2006
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
PACKAGING/ORDERING INFORMATION
(1)
MAXIMUM
RELATIVE
ACCURACY
(LSB)
±12
±8
±12
±8
MAXIMUM
DIFFERENTIAL
NONLINEARITY
(LSB)
±1
±1
±1
±1
MAXIMUM
REFERENCE
DRIFT
(ppm/°C)
25
25
5
5
MSOP-8
DGK
–40°C TO +105°C
D860
SPECIFIED
TEMPERATURE
RANGE
PRODUCT
DAC8560A
DAC8560B
DAC8560C
DAC8560D
(1)
PACKAGE-
LEAD
PACKAGE
DESIGNATOR
PACKAGE
MARKING
For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet, or see the TI
website at
www.ti.com.
ABSOLUTE MAXIMUM RATINGS
(1)
over operating free-air temperature range (unless otherwise noted)
UNIT
V
DD
to GND
Digital input voltage to GND
V
OUT
to GND
Operating temperature range
Storage temperature range
Junction temperature range (T
J
max)
Power dissipation (DGK)
Thermal impedance,
θ
JA
Thermal impedance,
θ
JC
ESD rating
(1)
Human body model (HBM)
Charged device model (CDM)
–0.3V to 6V
–0.3V to +V
DD
+ 0.3V
–0.3V to +V
DD
+ 0.3V
–40°C to +105°C
–65°C to +150°C
+150°C
(T
J
max – T
A
)/θ
JA
206°C/W
44°C/W
4000V
1500V
Stresses above those listed under
absolute maximum ratings
may cause permanent damage to the device. Exposure to absolute
maximum conditions for extended periods may affect device reliability.
2
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DAC8560
www.ti.com
SLAS464 – DECEMBER 2006
ELECTRICAL CHARACTERISTICS
V
DD
= 2.7V to 5.5V, –40°C to +105°C range (unless otherwise noted)
PARAMETER
STATIC PERFORMANCE
(1)
Resolution
Relative accuracy
Differential nonlinearity
Zero-code error
Full-scale error
Gain error
Zero-code error drift
Gain temperature coefficient
PSRR
Power supply rejection ratio
V
DD
= 5V
V
DD
= 2.7V
Output unloaded
Measured by line passing through codes 485 and 64714.
Measured by line passing
through codes 485 and 64714
16-bit Monotonic
DAC8560A, DAC8560C
DAC8560B, DAC8560D
16
±4
±4
±0.5
±5
±0.2
±0.05
±20
±1
±3
1
±12
±8
±1
±12
±0.5
±0.2
Bits
LSB
LSB
LSB
mV
% of FSR
% of FSR
µV/°C
ppm of FSR/°C
mV/V
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT CHARACTERISTICS
(2)
Output voltage range
Output voltage settling time
Slew rate
Capacitive load stability
Code change glitch impulse
Digital feedthrough
DC output impedance
Short-circuit current
R
L
=
∞
R
L
= 2kΩ
1LSB change around major carry
SCLK toggling, SYNC high
At mid-code input
V
DD
= 5V
V
DD
= 3V
Coming out of power-down mode V
DD
= 5V
Coming out of power-down mode V
DD
= 3V
To
±0.003%
FSR, 0200h to FD00h, R
L
= 2kΩ,
0pF < C
L
< 200pF
R
L
= 2kΩ, C
L
= 500pF
0
8
12
1.8
470
1000
0.15
0.15
1
50
20
2.5
5
nV-s
nV-s
Ω
mA
µs
V/µs
pF
V
REF
10
µs
V
Power-up time
AC PERFORMANCE
(2)
SNR
THD
SFDR
SINAD
DAC output noise density
DAC output noise
88
T
A
= +25°C, BW = 20kHz, V
DD
= 5V, f
OUT
= 1kHz,
1st 19 harmonics removed for SNR calculation
–77
79
77
T
A
= +25°C, at mid-code input, f
OUT
= 1kHz
T
A
= +25°C, at mid-code input, 0.1Hz to 10Hz
170
50
dB
dB
dB
dB
nV/√Hz
µV
PP
(1)
(2)
Linearity calculated using a reduced code range of 485 to 64714; output unloaded.
Ensured by design and characterization, not production tested.
Submit Documentation Feedback
3
DAC8560
www.ti.com
SLAS464 – DECEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
V
DD
= 2.7V to 5.5V, –40°C to +105°C range (unless otherwise noted)
PARAMETER
REFERENCE OUTPUT
Output voltage
Initial accuracy
Output voltage temperature drift
Output voltage noise
Output voltage noise density
(high-frequency noise)
Load regulation, sourcing
(5)
Load regulation,
sinking
(5)
Output current load capability
(6)
Line regulation
Long-term stability/drift (aging)
(5)
Thermal hysteresis
(5)
REFERENCE
Internal reference current consumption
External reference current
Reference input range
Reference input impedance
LOGIC INPUTS
Input current
V
IN
L
V
IN
H
Logic input LOW voltage
V
DD
= 5V
V
DD
= 3V
V
DD
= 5V
V
DD
= 3V
2.4
2.1
3
(6)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
T
A
= +25°C
T
A
= +25°C
DAC8560A, DAC8560B
(3)
DAC8560C, DAC8560D
(4)
f = 0.1Hz to 10Hz
T
A
= +25°C, f = 1MHz, C
L
= 0µF
T
A
= +25°C, f = 1MHz, C
L
= 1µF
T
A
= +25°C, f = 1MHz, C
L
= 4µF
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C, time = 0 to 1900 hours
First cycle
Additional cycles
2.4995
–0.02
2.5
±0.004
5
2
16
125
20
2
30
15
±20
10
50
100
25
2.5005
0.02
25
5
V
%
ppm/°C
µV
PP
nV/√Hz
µV/mA
µV/mA
mA
µV/V
ppm
ppm
V
DD
= 5.5V
V
DD
= 3.6V
External V
REF
= 2.5V, if internal reference is disabled
0
360
348
20
V
DD
125
±1
0.8
0.6
µA
µA
V
kΩ
µA
V
Logic input HIGH voltage
V
pF
Pin capacitance
POWER REQUIREMENTS
V
DD
Normal mode
I
DD (7)
All power-down modes
V
DD
= 3.6V to 5.5V, V
IH
= V
DD
and V
IL
= GND
V
DD
= 2.7V to 3.6V, V
IH
= V
DD
and V
IL
= GND
V
DD
= 3.6V to 5.5V, V
IH
= V
DD
and V
IL
= GND
V
DD
= 2.7V to 3.6V, V
IH
= V
DD
and V
IL
= GND
V
DD
= 3.6V to 5.5V
V
DD
= 2.7V to 3.6V
V
DD
= 3.6V to 5.5V
V
DD
= 2.7V to 3.6V
–40
2.7
0.530
0.510
1.2
0.7
2.6
1.5
6
2
5.5
0.850
0.840
2.5
2.2
4.7
3.0
14
8
V
mA
µA
mW
µW
Power
dissipation
(7)
Normal mode
All power-down modes
TEMPERATURE RANGE
Specified performance
+105
°C
(3)
(4)
(5)
(6)
(7)
Reference is trimmed and tested at room temperature, and is characterized from –40°C to +120°C.
Reference is trimmed and tested at two temperatures (+25°C and +105°C), and is characterized from –40°C to +120°C.
Explained in more detail in the
Application Information
section of this data sheet.
Ensured by design and characterization, not production tested.
Input code = 32768, reference current included, no load.
4
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DAC8560
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SLAS464 – DECEMBER 2006
PIN CONFIGURATION
MSOP-8
(Top View)
V
DD
V
REF
V
FB
V
OUT
1
2
DAC8560
3
4
6
5
SCLK
SYNC
8
7
GND
D
IN
PIN DESCRIPTIONS
PIN
1
2
3
4
5
6
7
8
NAME
V
DD
V
REF
V
FB
V
OUT
SYNC
SCLK
D
IN
GND
Power supply input, 2.7V to 5.5V.
Reference voltage input/output.
Feedback connection for the output amplifier. For voltage output operation, tie to V
OUT
externally.
Analog output voltage from DAC. The output amplifier has rail-to-rail operation.
Level-triggered control input (active LOW). This is the frame synchronization signal for the input data. When SYNC goes
LOW, it enables the input shift register, and data is sampled on subsequent falling clock edges. The DAC output updates
following the 24th clock. If SYNC is taken HIGH before the 24th clock edge, the rising edge of SYNC acts as an interrupt,
and the write sequence is ignored by the DAC8560. Schmitt-Trigger logic Input.
Serial clock input. Schmitt-Trigger logic input.
Serial data input. Data is clocked into the 24-bit input shift register on each falling edge of the serial clock input.
Schmitt-Trigger logic Input.
Ground reference point for all circuitry on the part.
DESCRIPTION
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