DAC8830
DAC8831
IVC
102
OP
A1
32
DA
C8
®
831
SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
16-Bit, Ultra-Low Power, Voltage-Output
Digital-to-Analog Converters
FEATURES
DESCRIPTION
1
•
•
•
•
•
•
•
•
•
234
•
16-Bit Resolution
2.7 V to 5.5 V Single-Supply Operation
Very Low Power: 15 μW for 3 V Power
High Accuracy, INL: 1 LSB
Low Noise: 10 nV/√Hz
Fast Settling: 1.0 μS
Fast SPI™ Interface, up to 50 MHz
Reset to Zero-Code
Schmitt-Trigger Inputs for Direct Optocoupler
Interface
Industry-Standard Pin Configuration
The DAC8830 and DAC8831 are single, 16-bit,
serial-input,
voltage-output
digital-to-analog
converters (DACs) operating from a single 3 V to 5 V
power supply. These converters provide excellent
linearity (1 LSB INL), low glitch, low noise, and fast
settling (1.0 μS to 1/2 LSB of full-scale output) over
the specified temperature range of –40°C to +85°C.
The output is unbuffered, which reduces the power
consumption and the error introduced by the buffer.
These parts feature a standard high-speed (clock up
to 50 MHz), 3 V or 5 V SPI serial interface to
communicate with a DSP or microprocessor.
The DAC8830 output is 0 V to VREF. However, the
DAC8831 provides bipolar output (±VREF) when
working with an external buffer. The DAC8830 and
DAC8831 are both reset to zero code after power up.
For optimum performance, a set of Kelvin
connections to external reference and analog ground
input are provided on the DAC8831.
APPLICATIONS
•
•
•
•
•
Portable Equipment
Automatic Test Equipment
Industrial Process Control
Data Acquisition Systems
Optical Networking
The DAC8830 is available in an SO-8 package, and
the DAC8831 in an SO-14 package. Both have
industry standard pinouts (see Table 3, the
cross-reference table in the Application Information
section for details). The DAC8831 is also available in
a QFN-14 package.
DAC8830
Functional Block Diagram
DAC8831
Functional Block Diagram
VDD
VDD
VREF−S
VREF−F
RINV
SCLK
Serial
Interface
CS
VOUT
AGND
Input
Register
DAC Latch
CS
SCLK
SDI
SDI
RFB
INV
DAC8830
DGND
RFB
LDAC
Serial Interface
and Control Logic
DAC
VREF
DAC
VOUT
+V
−
+
VO
−V
OPA277
OPA704
AGNDS OPA727
AGNDF
Input
Register
DAC Latch
DAC8831
DGND
1
2
3
4
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 Corp.
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 © 2005–2007, Texas Instruments Incorporated
DAC8830
DAC8831
www.ti.com
SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
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.
ORDERING INFORMATION (1)
PRODUCT
MINIMUM
RELATIVE
ACCURACY
(LSB)
DIFFERENTIAL
NONLINEARITY
(LSB)
POWERON
RESET
VALUE
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
PACKAGELEAD
PACKAGE
DESIGNATOR
DAC8830ID
±4
±1
Zero Code
–40°C to +85°C
8830I
SO-8
D
DAC8830IBD
DAC8830ICD
DAC8831ID
DAC8831IBD
DAC8831ICD
DAC8831IRGY
DAC8831IBRGY
DAC8831ICRGY
(1)
±2
±1
±4
±2
±1
±4
±2
±1
±1
Zero Code
±1
Zero Code
±1
Zero Code
±1
Zero Code
±1
Zero Code
±1
Zero Code
±1
Zero Code
±1
Zero Code
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
8830I
8830I
8831I
8831I
8831I
8831I
8831I
8831I
SO-8
ORDERING
NUMBER
TRANSPORT
MEDIA,
QUANTITY
DAC8830ID
Tubes, 75
DAC8830IDR
Tape and Reel, 2500
DAC8830IBD
Tubes, 75
DAC8830IBDR
Tape and Reel, 2500
D
SO-8
DAC8830ICD
Tubes, 75
DAC8830ICDR
Tape and Reel, 2500
D
SO-14
DAC8831ID
Tube, 50
DAC8831IDR
Tape and Reel, 2500
D
SO-14
DAC8831IBD
Tube, 50
DAC8831IBDR
Tape and Reel, 2500
D
SO-14
DAC8831ICD
Tube, 50
DAC8831ICDR
Tape and Reel, 2500
D
QFN-14
DAC8831IRGYT
Tape and Reel, 250
DAC8831IRGYR
Tape and Reel, 1000
RGY
QFN-14
DAC8831IBRGYT
Tape and Reel, 250
DAC8831IBRGYR
Tape and Reel, 1000
RGY
QFN-14
DAC8831ICRGYT
Tape and Reel, 250
DAC8831ICRGYR
Tape and Reel, 1000
RGY
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
Over operating free-air temperature range (unless otherwise noted) (1)
VDD to AGND
DAC8830, DAC8831
UNIT
–0.3 to +7
V
Digital input voltage to DGND
–0.3 to +VDD + 0.3
V
VOUT to AGND
–0.3 to +VDD + 0.3
V
–0.3 to +0.3
V
Operating temperature range
–40 to +85
°C
Storage temperature range
–65 to +150
°C
+150
°C
AGND, AGNDF, AGNDS to DGND
Junction temperature range (TJ max)
(TJ max - TA) / θJA
W
QFN-14
54.9
°C/W
SO-8
136.9
°C/W
SO-14
66.6
°C/W
Power dissipation
Thermal impedance, θJA
(1)
2
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.
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Product Folder Link(s): DAC8830 DAC8831
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
ELECTRICAL CHARACTERISTICS
All specifications at TA = TMIN to TMAX, VDD = +3 V or VDD = +5 V, VREF = +2.5 V unless otherwise noted.
DAC8830, DAC8831
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
STATIC PERFORMANCE
Resolution
Linearity error
16
bits
DAC8830ICD,
DAC8831ICD,
DAC8831ICRGY
±0.5
±1
DAC8830IBD,
DAC8831IBD,
DAC8831IBRGY
±0.5
±2
DAC8830ID,
DAC8831ID,
DAC8831IRGY
±0.5
±4
±0.5
±1
±1
±5
Differential linearity error
All grades
TA = +25°C
Gain error
TA = –40°C to +85°C
±7
Gain drift
±0.1
TA = +25°C
Zero code error
±0.25
TA = –40°C to +85°C
LSB
LSB
ppm/°C
±1
±2
Zero code drift
LSB
±0.05
LSB
ppm/°C
OUTPUT CHARACTERISTICS
Voltage output (1)
All devices
Unipolar operation
DAC8831 only
Bipolar operation
Output impedance
Settling time
Slew rate
To 1/2 LSB of FS, CL = 10 pF
(2)
Digital-to-analog glitch
Output noise
(1)
(2)
(3)
DAC8831 only
1
μs
V/μs
0.2
nV-s
RFB / RINV
Bipolar zero drift
kΩ
nV-s
VDD varies ±10%
DAC8831 only
V
6.25
35
Bipolar resistor
matching
Bipolar zero error
V
25
Power-supply rejection
DAC8831 only
+VREF
1 LSB change around major carry
TA = +25°C
DAC8831
+VREF
CL = 10 pF
Digital feedthrough (3)
DAC8830
0
–VREF
Ratio error
TA = +25°C
10
nV/√Hz
18
±1
±0.0015
±0.0076
±0.25
±5
TA = –40°C to +85°C
LSB
Ω/Ω
1
±7
±0.2
%
LSB
ppm/°C
The DAC8830 output is unipolar (0 V to +VREF). The DAC8831 output is bipolar (±VREF) when it connects to an external buffer (see the
Bipolar Output Operation section for details).
Slew rate is measured from 10% to 90% of transition when the output changes from 0 to full-scale.
Digital feedthrough is defined as the impulse injected into the analog output from the digital input. It is measured when the DAC output
does not change; CS is held high, while SCLK and DIN signals are toggled.
Copyright © 2005–2007, Texas Instruments Incorporated
Product Folder Link(s): DAC8830 DAC8831
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
All specifications at TA = TMIN to TMAX, VDD = +3 V or VDD = +5 V, VREF = +2.5 V unless otherwise noted.
DAC8830, DAC8831
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
VDD
V
REFERENCE INPUT
Reference input voltage range
Reference input impedance (4)
1.25
Unipolar mode
9
Bipolar mode, DAC8831
Reference –3dB bandwidth, BW
Code = FFFFh
Reference feedthrough
Code = 0000h, VREF = 1 VPP at 100 kHz
Signal-to-noise ratio, SNR
Reference input capacitance
kΩ
7.5
1.3
MHz
1
mV
92
dB
Code = 0000h
75
Code = FFFFh
120
pF
DIGITAL INPUTS
VIL
Input low voltage
VIH
Input high voltage
VDD = 2.7 V
0.6
VDD = 5 V
0.8
VDD = 2.7 V
2.1
VDD = 5 V
2.4
V
V
Input current
±1
μA
Input capacitance
10
pF
Hysteresis voltage
0.4
V
POWER SUPPLY
VDD
IDD
Power-supply voltage
Power-supply current
Power
2.7
5.5
VDD = 3 V
5
20
VDD = 5 V
5
20
VDD = 3 V
15
60
VDD = 5 V
25
100
V
μA
μW
TEMPERATURE RANGE
Specified performance
(4)
4
–40
+85
°C
Reference input resistance is code-dependent, minimum at 8555h.
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Product Folder Link(s): DAC8830 DAC8831
DAC8830
DAC8831
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
PIN CONFIGURATIONS (NOT TO SCALE)
AGNDF
3
12
DGND
5
SCLK
AGNDS
4
11
LDAC
VREF−S
5
10
SDI
VREF−F
6
9
NC
CS
7
8
SCLK
VDD
NC
SDI
13
12
11
10
9
14
8 SCLK
DAC8831
Thermal Pad(1)
RFB
1
7 CS
2
3
4
5
6
VREF−F
INV
6
SDI
VDD
13
VREF−S
14
2
LDAC
4
1
VOUT
AGNDS
CS
RFB
DGND
DGND
3
VDD
7
AGNDF
VREF
8
INV
2
RGY PACKAGE
QFN-14
(TOP VIEW)
VOUT
1
D PACKAGE
SO-14
(TOP VIEW)
DAC8831
VOUT
AGND
DAC8830
D PACKAGE
SO-8
(TOP VIEW)
NOTE: (1) Exposed thermal pad in the QFN package
must be connected to analog ground.
TERMINAL FUNCTIONS
TERMINAL
NO.
DESCRIPTION
NAME
DAC8830
1
VOUT
Analog output of DAC
2
AGND
Analog ground
3
VREF
Voltage reference input
4
CS
Chip select input (active low). Data are not clocked into SDI unless CS is low
5
SCLK
Serial clock input
6
SDI
Serial data input. Data are latched into input register on the rising edge of SCLK.
7
DGND
Digital ground
8
VDD
Analog power supply, +3 V to +5 V
1
RFB
Feedback resistor. Connect to the output of external operational amplifier in bipolar mode.
2
VOUT
Analog output of DAC
3
AGNDF
Analog ground (Force)
4
AGNDS
Analog ground (Sense)
5
VREF–S
Voltage reference input (Sense). Connect to external voltage reference
6
VREF–F
Voltage reference input (Force). Connect to external voltage reference
7
CS
Chip select input (active low). Data are not clocked into SDI unless CS is low.
8
SCLK
Serial clock input.
9
NC
No internal connection
10
SDI
Serial data input. Data are latched into input register on the rising edge of SCLK.
11
LDAC
Load DAC control input. Active low. When LDAC is Low, the DAC latch is simultaneously updated with the content
of the input register.
12
DGND
Digital ground
13
INV
Junction point of internal scaling resistors. Connect to external operational amplifier inverting input in bipolar mode.
14
VDD
Analog power supply, +3 V to +5 V.
DAC8831
Copyright © 2005–2007, Texas Instruments Incorporated
Product Folder Link(s): DAC8830 DAC8831
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
t td
CS
DAC
Updated
t Delay
t sck
t Lead
t wsck
t Lag
t wsck
t DSCLK
SCLK
t su
t ho
BIT15 (MSB)
SDI
BIT14
BIT13, . . . ,1
BIT0
--- Don't Care
Figure 1. DAC8830 Timing Diagram
Case1: LDAC tied to LOW
t td
CS
DAC
Updated
t Delay
t sck
t Lead
t wsck
t Lag
t wsck
t DSCLK
SCLK
t su
t ho
SDI
BIT 15 (MSB)
LDAC
BIT 14
BIT 13, . . . ,1
BIT 0
LOW
−−−Don’t Care
Case2: LDAC Active
t td
CS
t Delay
t sck
t Lead
t wsck
t Lag
t wsck
t DSCLK
SCLK
t su
SDI
t ho
BIT 15 (MSB)
BIT 14
BIT 13, . . . ,1
BIT 0
t DLADC
HIGH
LDAC
t WLDAC
DAC
Updated
−−−Don’t Care
Figure 2. DAC8831 Timing Diagram
6
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
TIMING CHARACTERISTICS: VDD = +5 V (1) (2)
At –40°C to +85°C, unless otherwise noted.
PARAMETER
MIN
MAX
UNIT
tsck
SCLK period
20
ns
twsck
SCLK high or low time
10
ns
tDelay
Delay from SCLK high to CS low
10
ns
tLead
CS enable lead time
10
ns
tLag
CS enable lag time
10
ns
tDSCLK
Delay from CS high to SCLK high
10
ns
ttd
CS high between active period
30
ns
tsu
Data setup time (input)
10
ns
tho
Data hold time (input)
0
ns
tWLDAC
LDAC width
30
ns
tDLDAC
Delay from CS high to LDAC low
30
ns
VDD high to CS low (power-up delay)
10
μs
(1)
(2)
Assured by design. Not production tested.
Sample tested during the initial release and after any redesign or process changes that may affect this parameter.
TIMING CHARACTERISTICS: VDD = +3 V (1) (2)
At –40°C to +85°C, unless otherwise noted.
PARAMETER
MIN
MAX
UNIT
tsck
SCLK period
20
ns
twsck
SCLK high or low time
10
ns
tDelay
Delay from SCLK high to CS low
10
ns
tLead
CS enable lead time
10
ns
tLag
CS enable lag time
10
ns
tDSCLK
Delay from CS high to SCLK high
10
ns
ttd
CS high between active period
30
ns
tsu
Data setup time (input)
10
ns
tho
Data hold time (input)
0
ns
tWLDAC
LDAC width
30
ns
tDLDAC
Delay from CS high to LDAC low
30
ns
VDD high to CS low (power-up delay)
10
μs
(1)
(2)
Assured by design. Not production tested.
Sample tested during the initial release and after any redesign or process changes that may affect this parameter.
Copyright © 2005–2007, Texas Instruments Incorporated
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
TYPICAL CHARACTERISTICS: VDD = +5 V
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +25_C
VREF = 2.5 V
0.50
0.50
0.25
0.25
0
−0.25
−0.25
−0.50
−0.75
−0.75
−1.00
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 3.
Figure 4.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = −40_ C
VREF = 2.5 V
0.75
0.50
0.50
0.25
0.25
0
−0.25
TA = −40_ C
VREF = 2.5 V
0.75
DNL (LSB)
INL (LSB)
0
−0.50
−1.00
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
−1.00
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 5.
Figure 6.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +85_C
VREF = 2.5 V
0.75
0.50
0.50
0.25
0.25
0
−0.25
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
TA = +85_C
VREF = 2.5 V
0.75
DNL (LSB)
INL (LSB)
TA = +25_ C
VREF = 2.5 V
0.75
DNL (LSB)
INL (LSB)
0.75
−1.00
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 7.
8
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Figure 8.
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
TYPICAL CHARACTERISTICS: VDD = +5 V (continued)
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +25_ C
VREF = 5 V
TA = +25_C
VREF = 5 V
0.75
0.50
0.50
0.25
0.25
DNL (LSB)
INL (LSB)
0.75
0
−0.25
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
−1.00
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 9.
Figure 10.
LINEARITY ERROR
vs REFERENCE VOLTAGE
LINEARITY ERROR
vs SUPPLY VOLTAGE
0.75
0.75
VREF = 2.5 V
0.50
0.25
Linearity Error (LSB)
Linearity Error (LSB)
0.50
DNL
0
INL
−0.25
DNL
0.25
0
INL
−0.25
−0.50
−0.50
0
1
2
3
4
5
6
2.5
3.0
3.5
Reference Voltage (V)
4.0
4.5
5.0
Figure 11.
Figure 12.
GAIN ERROR
vs TEMPERATURE
ZERO-CODE ERROR
vs TEMPERATURE
1.25
VREF = 2.5 V
Zero−Code Error (LSB)
0.75
Gain Error (LSB)
6.0
0.50
Bipolar Mode
1.00
0.50
0.25
0
Unipolar Mode
−0.25
0.25
Bipolar Mode
0
−0.25
−0.50
−0.75
−60
5.5
Supply Voltage (V)
Unipolar Mode
VREF = 2.5 V
−40 −20
0
20
40
60
80
Temperature (_C)
100
120 140
−0.50
−60
−40 −20
Figure 13.
0
20
40
60
80
Temperature (_C)
100
120 140
Figure 14.
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SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
TYPICAL CHARACTERISTICS: VDD = +5 V (continued)
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
REFERENCE CURRENT
vs CODE (UNIPOLAR MODE)
REFERENCE CURRENT
vs CODE (BIPOLAR MODE)
300
300
VREF = 2.5 V
VREF = 2.5 V
250
Reference Current (µA)
Reference Current (µA)
250
200
150
100
200
150
100
50
50
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 15.
Figure 16.
SUPPLY CURRENT
vs DIGITAL INPUT VOLTAGE
SUPPLY CURRENT
vs TEMPERATURE
800
5
VREF = 2.5 V
700
4
600
Supply Current (µA)
Supply Current (µA)
VDD = 5 V
500
400
300
VDD = 3 V
200
VDD = 5 V
VLOGIC = 5 V
3
VDD = 3 V
VLOGIC = 3 V
2
1
100
0
0
1
2
3
Digital Input Voltage (V)
4
0
−60 −40
5
20 40
60
80
Temperature (_C)
100 120 140
Figure 18.
SUPPLY CURRENT
vs SUPPLY VOLTAGE
SUPPLY CURRENT
vs REFERENCE VOLTAGE
5.0
VREF = 2.5 V
4.5
4.5
4.0
Supply Current (µA)
4.0
3.5
3.0
2.5
2.0
1.5
3.5
VDD = 5 V
3.0
2.5
2.0
VDD = 3 V
1.5
1.0
1.0
0.5
0.5
0
0
2.7
3.0 3.3
3.6 3.9 4.2 4.5 4.8
Supply Voltage (V)
5.1
5.4
5.7 6.0
0
0.5
1.0
Figure 19.
10
0
Figure 17.
5.0
Supply Current (µA)
−20
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1.5 2.0 2.5 3.0 3.5
Reference Voltage (V)
4.0
4.5
5.0
Figure 20.
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TYPICAL CHARACTERISTICS: VDD = +5 V (continued)
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
MAJOR-CARRY GLITCH
(FALLING)
MAJOR-CARRY GLITCH
(RISING)
VREF = 2.5V
VREF = 2.5V
5V/div
5V/div
LDAC
LDAC
VOUT
VOUT
0.1V/div
0.1V/div
Time (0.5ms/div)
Time (0.5ms/div)
Figure 21.
Figure 22.
DAC SETTLING TIME
(FALLING)
DAC SETTLING TIME
(RISING)
VREF = 2.5V
5V/div
VREF = 2.5V
5V/div
LDAC
LDAC
1V/div
VOUT
VOUT
1V/div
Time (0.2ms/div)
Time (0.2ms/div)
Figure 23.
Figure 24.
DIGITAL
FEEDTHROUGH
VREF = 2.5 V
SDI
5V/div
VOUT
20mV/div
Time (50ns/div)
Figure 25.
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TYPICAL CHARACTERISTICS: VDD = +3 V
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +25_C
VREF = 1.5 V
0.50
0.50
0.25
0.25
0
−0.25
−0.25
−0.50
−0.75
−0.75
−1.00
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 26.
Figure 27.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = −40_C
VREF = 1.5 V
0.75
0.50
0.50
0.25
0.25
0
−0.25
TA = −40_C
VREF = 1.5 V
0.75
DNL (LSB)
INL (LSB)
0
−0.50
−1.00
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
−1.00
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 28.
Figure 29.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +85_C
VREF = 1.5 V
0.75
0.50
0.50
0.25
0.25
0
−0.25
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
TA = +85_C
VREF = 1.5 V
0.75
DNL (LSB)
INL (LSB)
TA = +25_C
VREF = 1.5 V
0.75
DNL (LSB)
INL (LSB)
0.75
−1.00
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 30.
12
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Figure 31.
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TYPICAL CHARACTERISTICS: VDD = +3 V (continued)
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
LINEARITY ERROR
vs DIGITAL INPUT CODE
DIFFERENTIAL LINEARITY ERROR
vs DIGITAL INPUT CODE
1.00
1.00
TA = +25_ C
VREF = 3 V
TA = +25_C
VREF = 3 V
0.75
0.50
0.50
0.25
0.25
DNL (LSB)
INL (LSB)
0.75
0
−0.25
0
−0.25
−0.50
−0.50
−0.75
−0.75
−1.00
−1.00
0
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 32.
Figure 33.
LINEARITY ERROR
vs REFERENCE VOLTAGE
GAIN ERROR
vs TEMPERATURE
1.00
0.75
0.75
Bipolar Mode
0.50
Gain Error (LSB)
Linearity Error (LSB)
0.50
DNL
0.25
0
−0.25
1.5
2.0
2.5
3.0
3.5
Unipolar Mode
−0.25
−0.50
−1.00
−60
−0.50
1.0
0
−0.75
INL
0.5
0.25
VDD = 3 V
VREF = 2.5 V
−40 −20
Reference Voltage (V)
100
Figure 35.
ZERO-CODE ERROR
vs TEMPERATURE
REFERENCE CURRENT
vs CODE (UNIPOLAR MODE)
120 140
300
VDD = 3 V
VREF = 2.5 V
0.25
VREF = 1.5 V
250
Reference Current (µA)
Zero−Code Error (LSB)
20
40
60
80
Temperature (_C)
Figure 34.
0.50
0
Unipolar Mode
−0.25
Bipolar Mode
−0.50
−0.75
−60
0
200
150
100
50
0
−40 −20
0
20
40
60
80
Temperature (_C)
100
120 140
0
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 36.
Figure 37.
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TYPICAL CHARACTERISTICS: VDD = +3 V (continued)
At TA = +25°C and VREF = +2.5 V, unless otherwise noted.
REFERENCE CURRENT
vs CODE (BIPOLAR MODE)
DIGITAL
FEEDTHROUGH
300
VREF = 2.5 V
VREF = 1.5 V
Reference Current (µA)
250
SDI
5V/div
200
150
VOUT
20mV/div
100
50
0
0
Time (50ns/div)
8192 16384 24576 32768 40960 49152 57344 65536
Digital Input Code
Figure 38.
Figure 39.
MAJOR-CARRY GLITCH
(FALLING)
MAJOR-CARRY GLITCH
(RISING)
VREF = 2.5V
5V/div
VREF = 2.5V
5V/div
LDAC
LDAC
VOUT
VOUT
0.1V/div
0.1V/div
Time (0.5ms/div)
Time (0.5ms/div)
Figure 40.
Figure 41.
DAC SETTLING TIME
(FALLING)
DAC SETTLING TIME
(RISING)
VREF = 2.5V
5V/div
LDAC
VREF = 2.5V
5V/div
LDAC
1V/div
VOUT
VOUT
1V/div
Time (0.2ms/div)
Time (0.2ms/div)
Figure 42.
Figure 43.
THEORY OF OPERATION
GENERAL DESCRIPTION
The DAC8830 and DAC8831 are single, 16-bit, serial-input, voltage-output DACs. They operate from a single
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supply ranging from 2.7 V to 5 V, and typically consume 5 μA. Data are written to these devices in a 16-bit word
format, via an SPI serial interface. To ensure a known power-up state, these parts are designed with a power-on
reset function. The DAC8830 and DAC8831 are reset to zero code. In unipolar mode, the DAC8830 and
DAC8831 are reset to 0 V, and in bipolar mode, the DAC8831 is reset to –VREF. Kelvin sense connections for the
reference and analog ground are included on the DAC8831.
DIGITAL-TO-ANALOG SECTIONS
The DAC architecture for both devices consists of two matched DAC sections and is segmented. A simplified
circuit diagram is shown in Figure 44. The four MSBs of the 16-bit data word are decoded to drive 15 switches,
E1 to E15. Each of these switches connects one of 15 matched resistors to either AGND or VREF. The remaining
12 bits of the data word drive switches S0 to S11 of a 12-bit voltage mode R-2R ladder network.
R
R
VOUT
2R
2R
S0
2R
S1
2R
2R
S11
E1
2R
2R
E2
E15
VREF
12−Bit R−2R Ladder
Four MSBs Decoded into
15 Equal Segments
Figure 44. DAC Architecture
OUTPUT RANGE
The output of the DAC is
VOUT = (VREF × Code)/65536.
Where Code is the decimal data word loaded to the DAC latch.
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POWER-ON RESET
Both devices have a power-on reset function to ensure the output is at a known state upon power-up. In the
DAC8830 and DAC8831, at power-up, the DAC latch and Input Registers contain all 0s until new data are loaded
from the input serial shift register. Therefore, after power-up, the output from pin VOUT of the DAC8830 is 0 V.
The output from pin VOUT of the DAC8831 is 0 V in unipolar mode and –VREF in bipolar mode.
However, the serial register of the DAC8830 and DAC8831 is not cleared on power-up, so its contents are
undefined. When loading data initially to the device, 16 bits or more should be loaded to prevent erroneous data
appearing on the output. If more than 16 bits are loaded, the last 16 are kept; if less than 16 are loaded, bits will
remain from the previous word. If the device must be interfaced with data shorter than 16 bits, the data should be
padded with 0s at the LSBs.
Serial Interface
The digital interface is a standard 3-wire connection compatible with SPI, QSPI™, Microwire™, and TI DSP
interfaces, which can operate at speeds up to 50 M-bits/sec. The data transfer is framed by CS, the chip select
signal. The DAC works as a bus slave. The bus master generates the synchronize clock, SCLK, and initiates the
transmission. When CS is high, the DAC is not accessed, and the clock SCLK and serial input data SDI are
ignored. The bus master accesses the DAC by driving pin CS low. Immediately following the high-to-low
transition of CS, the serial input data on pin SDI is shifted out from the bus master synchronously on the falling
edge of SCLK, and latched on the rising edge of SCLK into the input shift register, MSB first. The low-to-high
transition of CS transfers the contents of the input shift register to the input register. All data registers are 16-bit.
It takes 16 clocks of SCLK to transfer one data word to the parts. To complete a whole data word, CS must go
high immediately after 16 SCLKs are clocked in. If more than 16 SCLKs are applied during the low state of CS,
the last 16 bits are transferred to the input register on the rising edge of CS. However, if CS is not kept low
during the entire 16 SCLK cycles, data is corrupted. In this case, reload the DAC with a new 16-bit word.
In the DAC8830, the contents of the input register are transferred into the DAC latch immediately when the input
register is loaded, and the DAC output is updated at the same time.
The DAC8831 has an LDAC pin allowing the DAC latch to be updated asynchronously by bringing LDAC low
after CS goes high. In this case, LDAC must be maintained high while CS is low. If LDAC is tied permanently
low, the DAC latch is updated immediately after the input register is loaded (caused by the low-to-high transition
of CS).
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APPLICATION INFORMATION
Unipolar Output Operation
These DACs are capable of driving unbuffered loads of 60 kΩ. Unbuffered operation results in low supply current
(typically 5 μA) and a low offset error. The DAC8830 provides a unipolar output swing ranging from 0 V to VREF.
The DAC8831 can be configured to output both unipolar and bipolar voltages. Figure 45 and Figure 46 show a
typical unipolar output voltage circuit for each device, respectively. The code table for this mode of operation is
shown in Table 1.
Table 1. Unipolar Code
DAC LATCH CONTENTS
MSB
LSB
ANALOG OUTPUT
1111 1111 1111 1111
VREF × (65,535/65,536)
1000 0000 0000 0000
VREF × (32,768/65,536) = 1/2 VREF
0000 0000 0000 0001
VREF × (1/65,536)
0000 0000 0000 0000
0V
+5 V
+2.5 V
0.1 µF
0.1 µF
VDD
+
OPA277
OPA704
OPA727
VREF
DAC
VO = 0 to +VREF
VOUT
AGND
Serial
Interface
CS
SCLK
10 µF
Input
Register
DAC Latch
SDI
DAC8830
DGND
Figure 45. Unipolar Output Mode of DAC8830
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+5 V
+2.5 V
0.1 µF
VDD
0.1 µF
+
10 µF
OPA277
OPA704
OPA727
VREF−S VREF−F
RINV
RFB
RFB
+V
CS
SCLK
SDI
Serial Interface
and Control Logic
LDAC
DAC
INV
VOUT
VO = 0 to +VREF
−V
AGNDF
Input
Register
DAC Latch
AGNDS
DAC8831
DGND
Figure 46. Unipolar Output Mode of DAC8831
Assuming a perfect reference, the worst-case output voltage may be calculated from the following equation:
Unipolar Mode Worst-Case Output
V OUT_UNI + D
216
ǒVREF ) VGEǓ ) V ZSE ) INL
Where:
VOUT_UNI = Unipolar mode worst-case output
D = Code loaded to DAC
VREF = Reference voltage applied to part
VGE = Gain error in volts
VZSE = Zero-scale error in volts
INL = Integral nonlinearity in volts
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Bipolar Output Operation
With the aid of an external operational amplifier, the DAC8831 may be configured to provide a bipolar voltage
output. A typical circuit of such an operation is shown in Figure 47. The matched bipolar offset resistors RFB and
RINV are connected to an external operational amplifier to achieve this bipolar output swing; typically, RFB = RINV
= 28 kΩ.
+5 V
+2.5 V
0.1 µF
0.1 µF
+
VREF−S VREF−F
VDD
RINV
R FB
RFB
INV
SCLK
SDI
Serial Interface
and Control Logic
LDAC
CS
10 µF
VOUT
DAC
AGNDF
Input
Register
+V
VO = −VREF to +VREF
OPA277
−V OPA704
OPA727
AGNDS
DAC Latch
DAC8831
DGND
Figure 47. Bipolar Output Mode of DAC8831
Table 2 shows the transfer function for this output operating mode. The DAC8831 also provides a set of Kelvin
connections to the analog ground and external reference inputs.
Table 2. Bipolar Code
DAC LATCH CONTENTS
MSB
LSB
ANALOG OUTPUT
1111 1111 1111 1111
+VREF × (32,767/32,768)
1000 0000 0000 0001
+VREF × (1/32,768)
1000 0000 0000 0000
0V
0111 1111 1111 1111
–VREF × (1/32,768)
0000 0000 0000 0000
–VREF × (32,768/32,768) = –VREF
Assuming a perfect reference, the worst-case output voltage may be calculated from the following equation:
Bipolar Mode Worst-Case Output
V OUT_BIP +
ƪǒVOUT_UNI ) VOSǓ (2 ) RD) * VREF(1 ) RD)ƫ
1 ) ǒ2)RDǓ
A
Where:
VOS = External operational amplifier input offset voltage
RD = RFB and RIN resistor matching error
A = Operational amplifier open-loop gain
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Output Amplifier Selection
For bipolar mode, a precision amplifier should be used, supplied from a dual power supply. This provides the
±VREF output.
In a single-supply application, selection of a suitable operational amplifier may be more difficult because the
output swing of the amplifier does not usually include the negative rail; in this case, AGND. This output swing can
result in some degradation of the specified performance unless the application does not use codes near 0.
The selected operational amplifier needs to have low-offset voltage (the DAC LSB is 38 μV with a 2.5 V
reference), eliminating the need for output offset trims. Input bias current should also be low because the bias
current multiplied by the DAC output impedance (approximately 6.25 kΩ) adds to the zero-code error.
Rail-to-rail input and output performance are required. For fast settling, the slew rate of the operational amplifier
should not impede the settling time of the DAC. Output impedance of the DAC is constant and
code-independent, but in order to minimize gain errors the input impedance of the output amplifier should be as
high as possible. The amplifier should also have a 3 dB bandwidth of 1 MHz or greater. The amplifier adds
another time constant to the system, thus increasing the settling time of the output. A higher 3 dB amplifier
bandwidth results in a shorter effective settling time of the combined DAC and amplifier.
Reference and Ground
Since the input impedance is code-dependent, the reference pin should be driven from a low impedance source.
The DAC8830 and DAC8831 operate with a voltage reference ranging from 1.25 V to VDD. References below
1.25 V result in reduced accuracy.
The DAC full-scale output voltage is determined by the reference. Table 1 and Table 2 outline the analog output
voltage for particular digital codes.
For optimum performance, Kelvin sense connections are provided on the DAC8831. If the application does not
require separate force and sense lines, they should be tied together close to the package to minimize voltage
drops between the package leads and the internal die.
Power Supply and Reference Bypassing
For accurate high-resolution performance, it is recommended that the reference and supply pins be bypassed
with a 10 μF tantalum capacitor in parallel with a 0.1 μF ceramic capacitor.
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CROSS-REFERENCE
The DAC8830 and DAC8831 have an industry-standard pinout configuration (see Table 3).
Table 3. Cross-Reference
MODEL
INL
(LSB)
DNL
(LSB)
POWER-ON
RESET TO
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
PACKAGE
OPTION
CROSS
REFERENCE
DAC8830ICD
±1
±1
Zero Code
–40°C to +85°C
8-Lead Small Outline IC
SO-8
AD5541CR,
MAX541AESA
DAC8830IBD
±2
±1
Zero Code
–40°C to +85°C
8-Lead Small Outline IC
SO-8
AD5541BR,
MAX541BESA
DAC8830ID
±4
±1
Zero Code
–40°C to +85°C
8-Lead Small Outline IC
SO-8
AD5541AR,
MAX541CESA
N/A
±1
±1
Zero Code
–40°C to +85°C
8-Lead Plastic DIP
PDIP-8
MAX541AEPA
N/A
±2
±1
Zero Code
–40°C to +85°C
8-Lead Plastic DIP
PDIP-8
MAX541BEPA
N/A
±4
±1
Zero Code
–40°C to +85°C
8-Lead Plastic DIP
PDIP-8
MAX541CEPA
N/A
±1
±1
Zero Code
0°C to +70°C
8-Lead Small Outline IC
SO-8
AD5541LR
N/A
±2
±1.5
Zero Code
0°C to +70°C
8-Lead Small Outline IC
SO-8
AD5541JR
N/A
±1
±1
Zero Code
0°C to +70°C
8-Lead Plastic DIP
PDIP-8
MAX541AEPA
N/A
±2
±1
Zero Code
0°C to +70°C
8-Lead Plastic DIP
PDIP-8
MAX541BEPA
N/A
±4
±1
Zero Code
0°C to +70°C
8-Lead Plastic DIP
PDIP-8
MAX541CEPA
DAC8831ICD
±1
±1
Zero Code
–40°C to +85°C
14-Lead Small Outline IC
SO-14
AD5542CR,
MAX542AESD
DAC8831IBD
±2
±1
Zero Code
–40°C to +85°C
14-Lead Small Outline IC
SO-14
AD5542BR,
MAX542BESD
DAC8831ID
±4
±1
Zero Code
–40°C to +85°C
14-Lead Small Outline IC
SO-14
AD5542AR,
MAX542CESD
DAC8831ICRGY
±1
±1
Zero Code
–40°C to +85°C
14-Lead QFN
QFN-14
N/A
DAC8831IBRGY
±2
±1
Zero Code
–40°C to +85°C
14-Lead QFN
QFN-14
N/A
DAC8831IRGY
±4
±1
Zero Code
–40°C to +85°C
14-Lead QFN
QFN-14
N/A
N/A
±1
±1
Zero Code
–40°C to +85°C
14-Lead Plastic DIP
PDIP-14
MAX542ACPD
N/A
±2
±1
Zero Code
–40°C to +85°C
14-Lead Plastic DIP
PDIP-14
MAX542BCPD
N/A
±4
±1
Zero Code
–40°C to +85°C
14-Lead Plastic DIP
PDIP-14
MAX542CCPD
N/A
±1
±1
Zero Code
0°C to +70°C
14-Lead Small Outline IC
SO-14
AD5542LR
N/A
±2
±1.5
Zero Code
0°C to +70°C
14-Lead Small Outline IC
SO-14
AD5542JR
N/A
±1
±1
Zero Code
0°C to +70°C
14-Lead Small Outline IC
SO-14
MAX542AEPD
N/A
±2
±1
Zero Code
0°C to +70°C
14-Lead Small Outline IC
SO-14
MAX542BEPD
N/A
±4
±1
Zero Code
0°C to +70°C
14-Lead Small Outline IC
SO-14
MAX542CEPD
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PACKAGE OPTION ADDENDUM
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PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
DAC8830IBD
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830IBDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830ICD
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830ICDG4
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830ICDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830ID
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8830IDR
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC
8830I
Samples
DAC8831IBD
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831IBDR
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831ICD
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831ICDR
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831ICRGYT
ACTIVE
VQFN
RGY
14
250
RoHS & Green
Call TI
Level-2-260C-1 YEAR
-40 to 85
BKE
Samples
DAC8831ID
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831IDG4
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
DAC8831IDR
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
DAC8831I
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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