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PDF ( 数据手册 , 数据表 ) DAC7734E

零件编号 DAC7734E
描述 16-Bit/ Quad Voltage Output/ Serial Input DIGITAL-TO-ANALOG CONVERTER
制造商 Burr-Brown Corporation
LOGO Burr-Brown Corporation LOGO 


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DAC7734E 数据手册, 描述, 功能
®
DAC7734
DAC7734
For most current data sheet and other product
information, visit www.burr-brown.com
16-Bit, Quad Voltage Output, Serial Input
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 DOUBLE-BUFFERED DATA INPUTS
q ±1 LSB DNL: –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
q DAC-PER-PIN PROGRAMMERS
DAC7734
VDD VSS VCC
DESCRIPTION
The DAC7734 is a 16-bit, quad voltage output, digital-
to-analog converter with guaranteed 16-bit monotonic
performance over the specified temperature range. It
accepts 24-bit serial input data, has double-buffered
DAC input logic (allowing simultaneous update of all
DACs), and provides a serial data output for daisy
chaining multiple DACs. Programmable asynchronous
reset clears all registers to a mid-scale code of 8000H or
to a zero-scale of 0000H. The DAC7734 can operate
from a single +15V supply or from +15V and –15V, and
+5V supplies.
Low power and small size per DAC make the DAC7734
ideal for automatic test equipment, DAC-per-pin pro-
grammers, data acquisition systems, and closed-loop
servo-control. The DAC7734 is available in a 48-lead
SSOP package and offers guaranteed specifications
over the –40°C to +85°C temperature range.
VREFL
VREFH
AB Sense VREFL AB VREFH AB AB Sense
SDI
SDO
Shift
Register
Input
Register A
Input
Register B
CS
CLOCK
RST
RESTSEL
LDAC
LOAD
Control
Logic
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
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
PDS1-1570A
DPrinAtedCin7U7.S3.A4. December, 1999
®







DAC7734E 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 (00400H)
1.5
1
DAC A
0.5
0
–0.5
–1
DAC D
DAC C DAC B
–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
REFERENCE 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
POSITIVE FULL-SCALE ERROR
vs TEMPERATURE
2
Code (FFFFH)
1.5
1 DAC B
DAC D
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
REFERENCE 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
POWER SUPPLY CURRENT vs TEMPERATURE
4.0
Data = FFFFH (all DACs)
3.5 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)
POSITIVE SUPPLY CURRENT
vs DIGITAL INPUT CODE
4.0
No Load
3.5
ICC
3.0
2.5
2.0
1.5
1.0
0.5
0 IDD
–0.5
0
2000H 4000H 6000H 8000H A000H C000H E000H FFFFH
Digital Input Code
®
DAC7734
8







DAC7734E equivalent, schematic
THEORY OF OPERATION
The DAC7734 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, fol-
lowed by an operational amplifier that serves as a buffer.
Each DAC has its own R-2R ladder network, segmented
MSBs, and output op amp, as shown in Figure 1. The
minimum voltage output (zero-scale) and maximum voltage
output (full-scale) are set by the external voltage references
VREFL and VREFH.
The digital input is a 24-bit serial word that contains a 2-bit
address code for selecting one of four DACs, a quick load
bit, five unused bits and the 16-bit DAC code (MSB first).
The converters can be powered from either a single +15V
supply or a dual ±15V supply and a +5V logic 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 DAC7734.
RF
VOUT Sense
R
2R 2R
2R 2R 2R 2R 2R 2R 2R
VOUT
FIGURE 1. DAC7734 Architecture.
VREFH
VREFH Sense
VREFL
VREFL Sense
Serial Data In
Clock
Load DAC Registers
Load
Chips Select
Serial Data Out
Reset DAC Registers
+5V +
1µF 0.1µF
1 NC
2 NC
3 SDI
4 DGND
5 CLK
6 DGND
7 LDAC
8 DGND
9 LOAD
10 DGND
11 CS
12 DGND
13 SDO
14 DGND
15 RSTSEL
16 DGND
17 RST
18 DGND
19 NC
20 NC
21 DGND
22 DGND
23 VDD
24 VDD
VOUTA Sense
VOUTA
AGND
48
47
46
VSS
VREFL AB Sense
VREFL AB
VREFH AB
VREFH AB Sense
VOUTB Sense
VOUTB
VOUTC Sense
DAC7734
VOUTC
VREFH CD Sense
VREFH CD
VREFL CD
VREFL CD Sense
VOUTD Sense
VOUTD
VSS
VSS
AGND
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
AGND 27
VCC 26
VCC 25
NC = No Connection
FIGURE 2. Basic Single-Supply Operation of the DAC7734.
®
DAC7734
16
0V to +10V
+10.000V
0V to +10V
0V to +10V
+10.000V
0V to +10V
0.1µF
1µF
+
+15V










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