The DAC7621 is a 12-bit digital-to-analog converter
(DAC) with guaranteed 12-bit monotonicity perfor-
mance over the industrial temperature range. It re-
quires a single +5V supply and contains an input
register, latch, 2.435V reference, DAC, and high speed
rail-to-rail output amplifier. For a full-scale step, the
output will settle to 1 LSB within 7µs. The device
consumes 2.5mW (0.5mA at 5V).
The parallel interface is compatible with a wide variety
of microcontrollers. The DAC7621 accepts a 12-bit
parallel word, has a double-buffered input logic struc-
ture and provides data readback. In addition, two
control pins provide a chip select (CS) function and
asynchronous clear (CLR) input. The CLR input can
be used to ensure that the DAC7621 output is 0V on
power-up or as required by the application.
The DAC7621 is available in a 20-lead SSOP package
and is fully specified over the industrial temperature
range of –40°C to +85°C.
V
DD
APPLICATIONS
q
PROCESS CONTROL
q
DATA ACQUISITION SYSTEMS
q
CLOSED-LOOP SERVO-CONTROL
q
PC PERIPHERALS
q
PORTABLE INSTRUMENTATION
Ref
12-Bit DAC
12
V
OUT
CLR
LOADDAC
DAC Register
12
Input Register
12
CS
R/W
I/O Buffer
DAC7621
D0
D1 D2
D3 D4
D5 D6
D7 D8
D9 D10 D11
DGND
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
NOTES: (1) This term is sometimes referred to as Linearity Error or Integral Nonlinearity (INL). (2) Specification does not apply to negative-going transitions where
the final output voltage will be within 3 LSBs of ground. In this region, settling time may be double the value indicated.
To
±1
LSB of Final Value
CONDITIONS
MIN
12
–2
–1
–1
4.079
±5
±1/2
±1/2
+1
4.095
±7
1
500
±20
Indefinite
Parallel
Straight Binary
CMOS
0.7 • V
DD
0.3 • V
DD
±10
±10
7
5
2
+4.75
V
IH
= 5V, V
IL
= 0V, No Load, at Code 000
H
V
IH
= 5V, V
IL
= 0V, No Load
∆V
DD
=
±5%
–40
+5.0
0.5
2.5
0.001
+5.25
1
5
0.004
+85
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
+2
+1
+3
4.111
TYP
MAX
MIN
T
–1
–1
T
4.087
T
3
±1/4
±1/4
T
4.095
T
T
T
T
T
T
T
T
V
V
µA
µA
µs
nV-s
nV-s
V
mA
mW
%/%
°C
+1
+1
T
4.103
DAC7621EB
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
V
mA
LSB
pF
mA
Guaranteed Monotonic
Code 000
H
Code FFF
H
Code 800
H
R
LOAD
≥
402Ω, Code 800
H
No Oscillation
GND or V
DD
T
T
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
DAC7621
2
PIN CONFIGURATION
Top View
SSOP
PIN DESCRIPTIONS
PIN
1
2
3
LABEL
CLR
V
DD
V
OUT
AGND
DGND
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
R/W
CS
LOADDAC
DESCRIPTION
Reset. Resets the DAC register to zero. Active
LOW. Asynchronous input.
Postive Power Supply
DAC Output Voltage
Analog Ground
Digital Ground
Data Bit 11, MSB
Data Bit 10
Data Bit 9
Data Bit 8
Data Bit 7
Data Bit 6
Data Bit 5
Data Bit 4
Data Bit 3
Data Bit 2
Data Bit 1
Data Bit 0, LSB
Read and Write Control
Chip Select. Active LOW.
Loads the internal DAC register. The DAC register
is a transparent latch and is transparent when
LOADDAC is LOW (regardless of the state of CS or
CLK).
CLR
V
DD
V
OUT
AGND
DGND
DB11 (MSB)
DB10
DB9
DB8
DB7
1
2
3
4
5
6
7
8
9
10
DAC7621E
20
19
18
17
16
15
14
13
12
11
LOADDAC
CS
R/W
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ABSOLUTE MAXIMUM RATINGS
(1)
V
DD
to GND .......................................................................... –0.3V to 6V
Digital Inputs to GND .............................................. –0.3V to V
DD
+ 0.3V
V
OUT
to GND ........................................................... –0.3V to V
DD
+ 0.3V
Power Dissipation ........................................................................ 325mW
Maximum Junction Temperature .................................................. +150°C
Operating Temperature Range ...................................... –40°C to +85°C
Storage Temperature Range ....................................... –65°C to +150°C
Lead Temperature (soldering, 10s) .............................................. +300°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. Burr-Brown
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 degrada-
tion 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
MINIMUM
RELATIVE
ACCURACY
(LSB)
±2
±1
DIFFERENTIAL
NONLINEARITY
(LSB)
±1
±1
SPECIFICATION
TEMPERATURE
RANGE
–40°C to +85°C
PACKAGE
DRAWING
NUMBER
(1)
334
PRODUCT
DAC7621E
PACKAGE
20-Lead SSOP
ORDERING
NUMBER
(2)
DAC7621E
DAC7621E/1K
DAC7621EB
DAC7621EB/1K
TRANSPORT
MEDIA
Rails
Tape and Reel
Rails
Tape and Reel
"
DAC7621EB
"
"
"
"
"
–40°C to +85°C
"
20-Lead SSOP
"
334
"
"
"
"
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are
available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of “DAC7621E/1K” will get a single
1000-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.
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