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PDF DAC7631E1K Data sheet ( Hoja de datos )
| Número de pieza | DAC7631E1K | |
| Descripción | Serial Input/ 16-Bit/ Voltage Output DIGITAL-TO-ANALOG CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
DAC7631 ®
DAC7631
For most current data sheet and other product
information, visit www.burr-brown.com
Serial Input, 16-Bit, Voltage Output
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q LOW POWER: 2.5mW
q UNIPOLAR OR BIPOLAR OPERATION
q SETTLING TIME: 10µs to 0.003%
q 15-BIT LINEARITY AND MONOTONICITY:
–40°C to +85°C
q USER SELECTABLE RESET TO
MID-SCALE OR ZERO-SCALE
q SMALL SSOP-20 PACKAGE
DESCRIPTION
The DAC7631 is a serial input, 16-bit, voltage out-
put Digital-to-Analog Converter (D/A) with guaran-
teed 15-bit monotonic performance over the –40°C to
+85°C temperature range. An asynchronous reset clears
all registers to either mid-scale (8000H) or zero-scale
(0000H), selectable via the RESETSEL pin. The de-
vice can be powered from a single +5V supply or from
dual +5V and –5V supplies.
APPLICATIONS
q ATE PIN ELECTRONICS
q PROCESS CONTROL
q CLOSED-LOOP SERVO-CONTROL
q MOTOR CONTROL
q DATA ACQUISITION SYSTEMS
Low power and small size makes the DAC7631 ideal
for process control, data acquisition systems, and
closed-loop servo-control. The device is available in a
SSOP-20 package, and is guaranteed over the
–40°C to +85°C temperature range.
SDO
VDD
VCC
VSS
VREFL
Sense
VREFL
VREFH
VREFH
Sense
CLK
CS
Shift
Register
SDI
DAC7631
Input
Register
DAC
Register
LOAD
RSTSEL RST
LDAC
DAC A
DGND
VOUT
VOUT Sense
AGND
SBAS122
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-11536A
DPArintCed7in6U3.S.1A. August, 2000
®
1 page  
PIN CONFIGURATION
Top View
SSOP
VREFH 1
VREFH Sense 2
VREFL 3
VREFL Sense 4
DGND 5
VDD 6
SDO 7
SDI 8
CLK 9
CS 10
DAC7631
20 VCC
19 AGND
18 VSS
17 VOUT Sense
16 VOUT
15 NC
14 RSTSEL
13 RST
12 LOAD
11 LDAC
PIN DESCRIPTIONS
PIN LABEL DESCRIPTION
1
VREFH
DAC Reference High Input
2 VREFH Sense DAC Reference Sense High Input
3
VREFL
DAC Reference Low Input
4 VREFL Sense DAC Reference Sense Low Input
5
DGND
Digital Ground
6 VDD Logic Power Supply
7
SDO
Serial Data Output
8 SDI Serial Data Input
9
CLK
Data Clock
10 CS Chip Select, Active LOW.
11
LDAC
DAC Register Load Control, Rising Edge Triggered.
12
LOAD
DAC Input Register Load Control, Active LOW.
13
RST
Reset, Rising Edge. Depending on the state of
RSTSEL, the DAC Register is set to either midscale
or zero.
14 RSTSEL Reset Select. Determines the action of RST. If
HIGH, a RST command will set the DAC register to
midscale. If low, a RST command will set the DAC
register to zero.
15 NC No Connection
16
VOUT
DAC Voltage Output
17 VOUT Sense DAC Output Amplifier Inverting Input, Used to
Close the Feedback Loop at the Load.
18 VSS Negative Power Supply
19
AGND
Analog Ground
20 VCC Positive Power Supply
®
5 DAC7631
5 Page 
TYPICAL PERFORMANCE CURVES: VSS = –5V (Cont.)
At TA = +25°C, VDD = VCC = +5V, VSS = –5V, VREFH = +2.5V, and VREFL = –2.5V, representative unit, unless otherwise specified.
OUTPUT VOLTAGE vs SETTLING TIME
(+2.5V to –2.5V)
+5V
LDAC
0
Small-Signal Settling Time:
2LSB/div
Large-Signal Settling Time: 1V/div
Time (2µs/div)
THEORY OF OPERATION
The DAC7631 is a 16-bit voltage-output Digital-to-Analog
Converter (DAC). The architecture is an R-2R ladder con-
figuration with the three MSB’s segmented, followed by an
operational amplifier that serves as a buffer, as shown in
Figure 1. The minimum voltage output (zero-scale) and
maximum voltage output (full-scale) are set by external
voltage references at VREFL and VREFH, respectively.
The digital input is a 16-bit serial word representing the
16-bit DAC input code, sent MSB first. The DAC7631 can
be powered from either a single +5V supply or a dual ±5V
supply. The device offers a reset function which immedi-
ately sets the output voltage and DAC register to mid-scale
code (8000H) or to zero-scale code (0000H). See Figures 2
and 3 for the basic operation of the DAC7631.
R
2R 2R
2R 2R 2R 2R 2R 2R 2R
RF
VOUT Sense
VOUT
FIGURE 1. DAC7631 Architecture.
VREFH
VREFH Sense
VREFL
VREFL Sense
®
11 DAC7631
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet DAC7631E1K.PDF ] | |
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