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PDF ( 数据手册 , 数据表 ) DAC7744E

零件编号 DAC7744E
描述 16-Bit/ Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER
制造商 Burr-Brown Corporation
LOGO Burr-Brown Corporation LOGO 


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DAC7744E 数据手册, 描述, 功能
®
DAC7744
DAC7744
For most current data sheet and other product
information, visit www.burr-brown.com
16-Bit, Quad Voltage Output
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q LOW POWER: 200mW
q UNIPOLAR OR BIPOLAR OPERATION
q SINGLE-SUPPLY OUTPUT RANGE: +10V
q DUAL SUPPLY OUTPUT RANGE: ±10V
q SETTLING TIME: 10µs to 0.003%
q 16-BIT MONOTONICITY: –40°C to +85°C
q PROGRAMMABLE RESET TO MID-SCALE
OR ZERO-SCALE
q DATA READBACK
q DOUBLE-BUFFERED DATA INPUTS
APPLICATIONS
q PROCESS CONTROL
q ATE PIN ELECTRONICS
q CLOSED-LOOP SERVO-CONTROL
q MOTOR CONTROL
q DATA ACQUISITION SYSTEMS
q DAC-PER-PIN PROGRAMMERS
DAC7744
VDD VSS VCC
DESCRIPTION
The DAC7744 is a 16-bit, quad voltage output digital-
to-analog converter with guaranteed 16-bit monotonic
performance over the specified temperature range. It
accepts 16-bit parallel input data, has double-buffered
DAC input logic (allowing simultaneous update of all
DACs), and provides a readback mode of the internal
input registers. Programmable asynchronous reset
clears all registers to a mid-scale code of 8000H or to
a zero-scale of 0000H. The DAC7744 operates from
either a single +15V supply or from a +15V, –15V,
and +5V supply.
Low power and small size per DAC make the DAC7744
ideal for automatic test equipment, DAC-per-pin pro-
grammers, data acquisition systems, and closed-loop
servo-control. The DAC7744 is available in a 48-
lead SSOP package, and offers guaranteed specifica-
tions over the –40°C to +85°C temperature range.
VREFL
VREFH
AB Sense VREFL AB VREFH AB AB Sense
16 I/O
DATA I/O
Buffer
Input
Register A
Input
Register B
A1
A0 Control
CS Logic
R/W
Input
Register C
Input
Register D
DAC
Register A
DAC
Register B
DAC
Register C
DAC
Register D
DAC A
DAC B
DAC C
DAC D
VOUTA
VOUTA Sense
VOUTB
VOUTB Sense
VOUTC
VOUTC Sense
VOUTD
VOUTD Sense
AGND DGND
RST
RSTSEL LOADDACs VREFL VREFL CD VREFH CD VREFH
CD Sense
CD Sense
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
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1999 Burr-Brown Corporation
PDS-11534A
PDrintAedCin U7.S7.A4. 4November, 1999
®







DAC7744E pdf, 数据表
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.)
At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified.
ZERO-SCALE ERROR vs TEMPERATURE
2
Code (004201H)
1.5
DAC B
1
DAC D
0.5
0
–0.5
DAC A
DAC C
–1
–1.5
–2
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
0000H 2000H
CURRENT vs CODE
All DACs Sent to Indicated Code
(DAC A and B)
VREFH
VREFL
4000H 6000H 8000H A000H C000H
E000H FFFFH
Digital Input Code
POWER SUPPLY CURRENT vs TEMPERATURE
4.0
3.5
Data = FFFFH (all DACs)
No Load
ICC
3.0
2.5
2.0
1.5
1.0
0.5
IDD
0
–0.5
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
FULL-SCALE ERROR vs TEMPERATURE
2
Code (FFFFH)
1.5
DAC B
DAC D
1
0.5
0
–0.5
–1
DAC A
DAC C
–1.5
–2
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
0000H 2000H
CURRENT vs CODE
All DACS Sent to Indicated Code
(DAC C and D)
VREFH
VREFL
4000H 6000H 8000H A000H C000H
E000H FFFFH
Digital Input Code
POSITIVE SUPPLY CURRENT
vs DIGITAL INPUT CODE
4.0
No Load
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH
Digital Input Code
®
DAC7744
8







DAC7744E equivalent, schematic
THEORY OF OPERATION
The DAC7744 is a quad voltage output, 16-bit digital-to-
analog converter (DAC). The architecture is an R-2R ladder
configuration with the three MSB’s segmented followed by
an operational amplifier that serves as a buffer. Each DAC
has its own R-2R ladder network, segmented MSBs and
output op amp (see Figure 1). The minimum voltage output
(zero scale) and maximum voltage output (full scale) are set
by the external voltage references (VREFL and VREFH, re-
spectively). The digital input is a 16-bit parallel word and
the DAC input registers offer a readback capability. The
converters can be powered from either a single +15V supply
or a dual ±15V supply. The device offers a reset function
which immediately sets all DAC output voltages and DAC
registers to mid-scale code 8000H or to zero scale, code
0000H. See Figures 2 and 3 for the basic operation of the
DAC7744.
RF
VOUT Sense
R
2R 2R
2R 2R 2R 2R 2R 2R 2R
VOUT
FIGURE 1. DAC7744 Architecture.
VREFH
VREFH Sense
VREFL
VREFL Sense
Data
Bus
Reset DACs
Load DAC Registers
READ/WRITE
Address
Chip Select
1 DB15 (MSB)
NC 48
2 DB14
NC 47
3 DB13
NC 46
4 DB12
NC 45
5 DB11
VOUTA Sense 44
6 DB10
VOUTA 43
7 DB9
VREFL AB Sense 42
8 DB8
VREFL AB 41
9 DB7
VREFH AB 40
10 DB6
VREFH AB Sense 39
11 DB5
VOUTB Sense 38
12 DB4
13 DB3
DAC7744
VOUTB
VOUTC Sense
37
36
14 DB2
VOUTC 35
15 DB1
VREFH CD Sense 34
16 DB0 (LSB)
VREFH CD 33
17 RSTSEL
VREFL CD 32
18 RST
VREFL CD Sense 31
19 LOADDACS
VOUTD Sense 30
20 R/W
VOUTD 29
21 A1
VSS 28
22 A0
AGND 27
23 CS
24 DGND
VCC 26
VDD 25
NC = No Connection
FIGURE 2. Basic Single-Supply Operation of the DAC7744.
®
DAC7744
16
0V to +10V
+10.000V
0V to +10V
0V to +10V
+10.000V
0V to +10V
+15V
+
0.1µF
1µF
+5V
+
0.1µF
1µF










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