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PDF DAC7741Y Data sheet ( Hoja de datos )
| Número de pieza | DAC7741Y | |
| Descripción | 16-Bit/ Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface | |
| Fabricantes | Burr-Brown Corporation | |
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DAC7741
DAC7741
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: 5µs 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
APPLICATIONS
q PROCESS CONTROL
q ATE PIN ELECTRONICS
q CLOSED-LOOP SERVO CONTROL
q MOTOR CONTROL
q DATA ACQUISITION SYSTEMS
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 (0000H) or mid-scale
(8000H) 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.
VDD VSS VCC
REFADJ REFOUT REFIN
VREF
REFEN
CS
R/W
RST
RSTSEL
+10V
Reference
Control
Logic
Buffer
ROFFSET
RFB2
RFB1
Data I/O
16
I/O
Buffer
Input
Register
DAC
Register
DAC
SJ
VOUT
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.
www.ti.com
Copyright © 2001-2003, Texas Instruments Incorporated
1 page  
PIN CONFIGURATION
Top View
48 47 46 45 44 43 42 41 40 39 38 37
NC 1
VSS 2
VCC 3
VREF 4
ROFFSET 5
AGND 6
AGND 7
RFB2 8
RFB1 9
SJ 10
VOUT 11
NC 12
DAC7741
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 14 15 16 17 18 19 20 21 22 23 24
LQFP
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1 NC No Connection
2 VSS Negative Analog Power Supply.
3 VCC Positive Analog Power Supply.
4
VREF
Buffered Output from REFIN, can be used to
drive external devices. Internally, this pin
directly drives the DAC circuitry.
5
ROFFSET
Offsetting Resistor
6
AGND
Analog ground (Must be tied to analog ground)
7
AGND
Analog ground (Must be tied to analog ground)
8
RFB2
Feedback Resistor 2, used to configure DAC
output range.
9
RFB1
Feedback Resistor 1, used to configure DAC
output range.
10 SJ Summing Junction of the Output Amplifier
11
VOUT
DAC Voltage Output
12 NC No Connection
13 NC No Connection
14 NC No Connection
15 NC No Connection
16
DB0
Data Bit 0 (LSB)
17
DB1
Data Bit 1
18
DB2
Data Bit 2
19
DB3
Data Bit 3
20
DB4
Data Bit 4
21
DB5
Data Bit 5
22
DB6
Data Bit 6
23 NC No Connection
24 NC No Connection
25 NC No Connection
26
TEST
Reserved, Connect to DGND
27
DB7
Data Bit 7
PIN
NAME
DESCRIPTION
28
DB8
Data Bit 8
29
DB9
Data Bit 9
30
DB10
Data Bit 10
31
DB11
Data Bit 11
32
DB12
Data Bit 12
33
DB13
Data Bit 13
34
DB14
Data Bit 14
35
DB15
Data Bit 15 (MSB)
36 NC No Connection
37
DGND
Digital Ground
38 VDD Digital Power Supply
39
RST
VOUT reset; active LOW, depending on the state of
RSTSEL, the DAC register is either reset to mid-
scale or min-scale.
40
LDAC
DAC register load control, rising edge triggered.
Data is loaded from the input register to the DAC
register.
41 CS Chip Select, active LOW
42
R/W
Enabled by CS, controls data read (HIGH) and
write (LOW) from or to the input register.
43
RSTSEL
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.
44
REFEN
Enables internal +10V reference (REFOUT), active
LOW.
45
REFOUT
Internal Reference Output
46
REFADJ
Internal Reference Trim. (Acts as a gain
adjustment input when the internal reference is
used.)
47
REFIN
Reference Input
48 NC No Connection
DAC7741
SBAS248A
www.ti.com
5
5 Page 
TYPICAL CHARACTERISTICS (Cont.)
TA = +25°C (unless otherwise noted)
UNIPOLAR FULL-SCALE SETTLING TIME
Small-Signal Error (150µV/div)
Large-Signal Output (5V/div)
Unipolar Configuration: VOUT = 0V to +10V
+Full-Scale to Zero-Scale Change
5kΩ, 200pF Load
Time (2µs/div)
BIPOLAR FULL-SCALE SETTLING TIME
Small-Signal Error (300µV/div)
Large-Signal Output (5V/div)
Bipolar Configuration: VOUT = –10 to +10V
+Full-Scale to –Full-Scale
5kΩ, 200pF Load
Time (2µs/div)
MID-SCALE GLITCH
Code 8000H to 7FFFH
Bipolar Configuration: ±10V VOUT
MID-SCALE GLITCH
Code 7FFFH to 8000H
Bipolar Configuration: ±10V VOUT
Time (1µs/div)
Time (1µs/div)
DIGITAL FEEDTHROUGH
All Data Bits Toggling (5V/div)
CS = 5V
VOUT = 8000H (100mV/div)
Time (200ns/div)
DAC7741
SBAS248A
www.ti.com
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet DAC7741Y.PDF ] | |
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