DAC7741
DAC
774
1
SBAS248A – DECEMBER 2001 – REVISED JULY 2003
16-Bit, Single Channel
DIGITAL-TO-ANALOG CONVERTER
With Internal Reference and Parallel Interface
FEATURES
q
LOW POWER: 150mW MAXIMUM
q
+10V INTERNAL REFERENCE
q
UNIPOLAR OR BIPOLAR OPERATION
q
SETTLING TIME: 5
µ
s to
±
0.003% FSR
q
16-BIT MONOTONICITY, –40
°
C TO +85
°
C
q
±
10V,
±
5V OR +10V CONFIGURABLE VOLTAGE
OUTPUT
q
RESET TO MIN-SCALE OR MID-SCALE
q
DOUBLE-BUFFERED DATA INPUT
q
INPUT REGISTER DATA READBACK
q
SMALL LQFP-48 PACKAGE
DESCRIPTION
The DAC7741 is a 16-bit Digital-to-Analog Converter (DAC)
which provides 16 bits of monotonic performance over the
specified operating temperature range and offers a +10V,
low-drift internal reference. Designed for automatic test equip-
ment and industrial process control applications, the DAC7741
output swing can be configured in a
±10V, ±5V,
or +10V
range. The flexibility of the output configuration allows the
DAC7741 to provide both unipolar and bipolar operation by
pin strapping. The DAC7741 includes a high-speed output
amplifier with a maximum settling time of 5µs to
±0.003%
FSR for a 20V full-scale change and only consumes 100mW
(typical) of power.
The DAC7741 features a standard 16-bit parallel interface with
double buffering to allow asynchronous updates of the analog
output and data read-back to support data integrity verification
prior to an update. A user-programmable reset control allows
the DAC output to reset to min-scale (0000
H
) or mid-scale
(8000
H
) overriding the DAC register values. The DAC7741 is
available in a LQFP-48 package and four performance grades
specified to operate from 0°C to +70°C and –40°C to +85°C.
APPLICATIONS
q
PROCESS CONTROL
q
ATE PIN ELECTRONICS
q
CLOSED-LOOP SERVO CONTROL
q
MOTOR CONTROL
q
DATA ACQUISITION SYSTEMS
V
DD
V
SS
V
CC
REFADJ
REF
OUT
REF
IN
V
REF
R
OFFSET
Buffer
REFEN
CS
R/W
RST
RSTSEL
Control
Logic
+10V
Reference
RFB2
RFB1
SJ
Data I/O
16
I/O
Buffer
Input
Register
DAC
Register
DAC
V
OUT
AGND
DGND
LDAC
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.
All 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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2001-2003, Texas Instruments Incorporated
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1)
V
CC
to V
SS
........................................................................... –0.3V to +34V
V
CC
to AGND ...................................................................... –0.3V to +17V
V
SS
to AGND ...................................................................... –17V to +0.3V
AGND to DGND ................................................................. –0.3V to +0.3V
REF
IN
to AGND ..................................................................... –9V to +11V
V
DD
to DGND ................................................................. 0V to V
CC
– 1.4V
Digital Input Voltage to DGND ................................. –0.3V to V
DD
+ 0.3V
Digital Output Voltage to DGND .............................. –0.3V to V
DD
+ 0.3V
Operating Temperature Range ........................................ –40°C to +85°C
Storage Temperature Range ......................................... –65°C to +150°C
Junction Temperature .................................................................... +150°C
NOTE: (1) 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.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments 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.
PACKAGE/ORDERING INFORMATION
LINEARITY
ERROR
(LSB)
±6
DIFFERENTIAL
NONLINEARITY
(LSB)
±4
PACKAGE
DESIGNATOR
(1)
PT
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
ORDERING
NUMBER
DAC7741Y/250
DAC7741Y/2K
DAC7741YB/250
DAC7741YB/2K
DAC7741YC/250
DAC7741YC/2K
DAC7741YL/250
DAC7741YL/2K
PACKAGE
MARKING
DAC7741Y
TRANSPORT
MEDIA, QUANTITY
Tape and Reel, 250
Tape and Reel, 2000
Tape and Reel, 250
Tape and Reel, 2000
Tape and Reel, 250
Tape and Reel, 2000
Tape and Reel, 250
Tape and Reel, 2000
PRODUCT
DAC7741Y
PACKAGE-LEAD
LQFP-48
"
DAC7741YB
"
±4
"
±2
"
LQFP-48
"
PT
"
–40°C to +85°C
"
DAC7741YB
"
DAC7741YC
"
±3
"
±1
"
LQFP-48
"
PT
"
–40°C to +85°C
"
DAC7741YC
"
DAC7741YL
"
±2
"
±1
"
LQFP-48
"
PT
"
0°C to +70°C
"
DAC7741YL
"
"
"
"
"
"
"
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
ELECTRICAL CHARACTERISTICS
All specifications at T
A
= T
MIN
to T
MAX
, V
CC
= +15V, V
SS
= –15V, V
DD
= +5V, internal reference enabled, unless otherwise noted.
DAC7741Y
PARAMETER
ACCURACY
Linearity Error (INL)
T
A
= 25°C
Differential Linearity Error (DNL)
Monotonicity
Offset Error
Offset Error Drift
Gain Error
Gain Error Drift
PSRR (V
CC
or V
SS
)
ANALOG OUTPUT
(1)
Voltage Output
(2)
14
±2
With Internal REF
With External REF
With Internal REF
At Full-Scale
+11.4/–4.75
(1)
+11.4/–11.4
(1)
+11.4/–6.4
(1)
±5
±0.1
✻
±0.4
±0.25
200
±0.25
±0.1
✻
CONDITIONS
MIN
TYP
MAX
±6
±5
±4
15
✻
MIN
DAC7741YB
TYP
MAX
±4
±3
±2
UNITS
±15
50
0 to 10
±10
±5
±10
✻
✻
✻
✻
✻
✻
✻
✻
✻
LSB
LSB
LSB
Bits
% of FSR
ppm/°C
% of FSR
% of FSR
ppm/°C
ppm/V
V
V
V
mA
Ω
pF
mA
Output Current
Output Impedance
Maximum Load Capacitance
Short-Circuit Current
Short-Circuit Duration
REFERENCE
Reference Output
REF
OUT
Impedance
REF
OUT
Voltage Drift
REF
OUT
Voltage Adjustment
(3)
REF
IN
Input Range
(4)
REF
IN
Input Current
REFADJ Input Range
REFADJ Input Impedance
V
REF
Output Current
V
REF
Impedance
AGND
9.96
0.1
200
±15
Indefinite
10
400
±15
10.04
9.975
±25
4.75
✻
✻
±10
10.025
V
CC
– 1.4
10
✻
✻
✻
✻
V
Ω
ppm/°C
mV
V
nA
V
kΩ
mA
Ω
Absolute Max Value that
can be applied is V
CC
0
50
–2
1
10
✻
✻
✻
+2
✻
✻
✻
2
DAC7741
www.ti.com
SBAS248A
ELECTRICAL CHARACTERISTICS
(Cont.)
All specifications at T
A
= T
MIN
to T
MAX
, V
CC
= +15V, V
SS
= –15V, V
DD
= +5V, internal reference enabled, unless otherwise noted.
DAC7741Y
PARAMETER
DYNAMIC PERFORMANCE
Settling Time to
±0.003%
CONDITIONS
20V Output Step
R
L
= 5kΩ, C
L
= 200pF,
with external REF
OUT
to REF
IN
filter
(5)
at 10kHz
|I
H
| < 10µA
|I
L
| < 10µA
I
OH
= –0.8mA
I
OL
= 1.6mA
0.7 • V
DD
0.3 • V
DD
3.6
0.4
+4.75
+11.4
–15.75
–15.75
+5.0
+5.25
+15.75
–11.4
–4.75
6
✻
150
+85
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
MIN
TYP
3
MAX
5
MIN
DAC7741YB
TYP
✻
MAX
✻
UNITS
µs
Digital Feedthrough
Output Noise Voltage
DIGITAL INPUT
V
IH
V
IL
DIGITAL OUTPUT
V
OH
V
OL
POWER SUPPLY
V
DD
V
CC
V
SS
I
DD
I
CC
I
SS
Power
TEMPERATURE RANGE
Specified Performance
✻
Specifications same as grade to the left.
2
100
✻
✻
✻
nV-s
nV/√Hz
V
V
V
V
V
V
V
V
µA
mA
mA
mW
mW
°C
✻
Bipolar Operation
Unipolar Operation
Unloaded
Unloaded
No Load, Ext. Reference
No Load, Int. Reference
–4
100
4
–2.5
85
100
✻
✻
✻
✻
✻
✻
✻
–40
NOTES: (1) With minimum V
CC
/V
SS
requirements, internal reference enabled.
(2) Please refer to the “Theory of Operation” section for more information with respect to output voltage configurations.
(3) See Figure 7 for gain and offset adjustment connection diagrams when using the internal reference.
(4) The minimum value for REF
IN
must be equal to the greater of V
SS
+14V and +4.75V, where +4.75V is the minimum voltage allowed.
(5) Reference low-pass filter values: 100kΩ, 1.0µF (See Figure 10).
DAC7741
SBAS248A
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at T
A
= T
MIN
to T
MAX
, V
CC
= +15V, V
SS
= –15V, V
DD
= +5V, internal reference enabled, unless otherwise noted.
DAC7741YL
PARAMETER
ACCURACY
Linearity Error (INL)
T
A
= 25°C
Differential Linearity Error (DNL)
Monotonicity
Offset Error
Offset Error Drift
Gain Error
Gain Error Drift
PSRR (V
CC
or V
SS
)
ANALOG OUTPUT
(1)
Voltage Output
(2)
16
±2
With Internal REF
With External REF
With Internal REF
At Full-Scale
+11.4/–4.75
(1)
+11.4/–11.4
(1)
+11.4/–6.4
(1)
±5
±0.1
✻
±0.4
±0.25
200
±0.2
±0.1
✻
±1
CONDITIONS
MIN
TYP
MAX
±2
±1
16
✻
MIN
DAC7741YC
TYP
MAX
±3
±2
±1
UNITS
±15
50
0 to 10
±10
±5
±7
✻
✻
✻
✻
✻
✻
✻
✻
✻
LSB
LSB
LSB
Bits
% of FSR
ppm/°C
% of FSR
% of FSR
ppm/°C
ppm/V
V
V
V
mA
Ω
pF
mA
Output Current
Output Impedance
Maximum Load Capacitance
Short-Circuit Current
Short-Circuit Duration
REFERENCE
Reference Output
REF
OUT
Impedance
REF
OUT
Voltage Drift
REF
OUT
Voltage Adjustment
(3)
REF
IN
Input Range
(4)
REF
IN
Input Current
REFADJ Input Range
REFADJ Input Impedance
V
REF
Output Current
V
REF
Impedance
DYNAMIC PERFORMANCE
Settling Time to
±0.003%
AGND
9.96
0.1
200
±15
Indefinite
10
400
±15
10.04
9.975
±25
4.75
✻
✻
±7
10.025
V
CC
– 1.4
10
✻
✻
✻
✻
V
Ω
ppm/°C
mV
V
nA
V
kΩ
mA
Ω
µs
Absolute Max Value that
can be applied is V
CC
0
50
–2
1
10
✻
✻
✻
+2
✻
✻
✻
20V Output Step
R
L
= 5kΩ, C
L
= 200pF,
with external REF
OUT
to REF
IN
filter
(5)
at 10kHz
|I
H
| < 10µA
|I
L
| < 10µA
I
OH
= –0.8mA
I
OL
= 1.6mA
0.7 • V
DD
3
5
✻
✻
Digital Feedthrough
Output Noise Voltage
DIGITAL INPUT
V
IH
V
IL
DIGITAL OUTPUT
V
OH
V
OL
POWER SUPPLY
V
DD
V
CC
V
SS
I
DD
I
CC
I
SS
Power
TEMPERATURE RANGE
Specified Performance
✻
Specifications same as grade to the left.
2
100
✻
0.3 • V
DD
3.6
0.4
+4.00
+11.4
–15.75
–15.75
+5.0
+5.25
+15.75
–11.4
–4.75
6
✻
150
70
–40
+4.75
✻
✻
✻
✻
✻
✻
nV-s
nV/√Hz
V
V
V
V
V
V
V
V
µA
mA
mA
mW
mW
°C
✻
✻
✻
✻
✻
✻
✻
✻
Bipolar Operation
Unipolar Operation
Unloaded
Unloaded
No Load, Ext. Reference
No Load, Int. Reference
–4
100
4
–2.5
85
100
✻
✻
✻
✻
✻
✻
+85
0
NOTES: (1) With minimum V
CC
/ V
SS
requirements, internal reference enabled.
(2) Please refer to the “Theory of Operation” section for more information with respect to output voltage configurations.
(3) See Figure 7 for gain and offset adjustment connection diagrams when using the internal reference.
(4) The minimum value for REF
IN
must be equal to the greater of V
SS
+14V and +4.75V, where +4.75V is the minimum voltage allowed.
(5) Reference low-pass filter values: 100kΩ, 1.0µF (See Figure 10).
4
DAC7741
www.ti.com
SBAS248A
PIN CONFIGURATION
RSTSEL
REFADJ
REF
OUT
Top View
REF
IN
NC
LQFP
DGND
37
36 NC
35 DB15
34 DB14
33 DB13
32 DB12
31 DB11
30 DB10
29 DB9
28 DB8
27 DB7
26 TEST
25 NC
13
NC
14
NC
15
NC
16
DB0
17
DB1
18
DB2
19
DB3
20
DB4
21
DB5
22
DB6
23
NC
24
NC
DESCRIPTION
Data Bit 8
Data Bit 9
Data Bit 10
Data Bit 11
Data Bit 12
Data Bit 13
Data Bit 14
Data Bit 15 (MSB)
No Connection
Digital Ground
Digital Power Supply
V
OUT
reset; active LOW, depending on the state of
RSTSEL, the DAC register is either reset to mid-
scale or min-scale.
DAC register load control, rising edge triggered.
Data is loaded from the input register to the DAC
register.
Chip Select, active LOW
Enabled by CS, controls data read (HIGH) and
write (LOW) from or to the input register.
Reset Select; determines the action of RST. If
HIGH, RST will reset the DAC register to mid-
scale. If LOW, RST will reset the DAC register to
min-scale.
Enables internal +10V reference (REF
OUT
), active
LOW.
Internal Reference Output
Internal Reference Trim. (Acts as a gain
adjustment input when the internal reference is
used.)
Reference Input
No Connection
LDAC
RST
39
R/W
V
DD
38
CS
41
REFEN
48
NC
V
SS
V
CC
V
REF
R
OFFSET
AGND
AGND
RFB2
RFB1
1
2
3
4
5
6
7
8
9
47
46
45
44
43
42
40
DAC7741
SJ 10
V
OUT
11
NC 12
PIN DESCRIPTIONS
PIN
1
2
3
4
NAME
NC
V
SS
V
CC
V
REF
DESCRIPTION
No Connection
Negative Analog Power Supply.
Positive Analog Power Supply.
Buffered Output from REF
IN
, can be used to
drive external devices. Internally, this pin
directly drives the DAC circuitry.
Offsetting Resistor
Analog ground (Must be tied to analog ground)
Analog ground (Must be tied to analog ground)
Feedback Resistor 2, used to configure DAC
output range.
Feedback Resistor 1, used to configure DAC
output range.
Summing Junction of the Output Amplifier
DAC Voltage Output
No Connection
No Connection
No Connection
No Connection
Data Bit 0 (LSB)
Data Bit 1
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
No Connection
No Connection
No Connection
Reserved, Connect to DGND
Data Bit 7
47
48
REF
IN
NC
45
46
REF
OUT
REFADJ
44
REFEN
41
42
43
CS
R/W
RSTSEL
40
LDAC
PIN
28
29
30
31
32
33
34
35
36
37
38
39
NAME
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
NC
DGND
V
DD
RST
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
R
OFFSET
AGND
AGND
RFB2
RFB1
SJ
V
OUT
NC
NC
NC
NC
DB0
DB1
DB2
DB3
DB4
DB5
DB6
NC
NC
NC
TEST
DB7
DAC7741
SBAS248A
www.ti.com
5
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