Datenblatt-pdf.com


DAC7615PB Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer DAC7615PB
Beschreibung Quad/ Serial Input/ 12-Bit/ Voltage Output DIGITAL-TO-ANALOG CONVERTER
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 12 Seiten
DAC7615PB Datasheet, Funktion
® DAC7615
DAC7615
DAC7615
Quad, Serial Input, 12-Bit, Voltage Output
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q LOW POWER: 20mW
q UNIPOLAR OR BIPOLAR OPERATION
q SETTLING TIME: 10µs to 0.012%
q 12-BIT LINEARITY AND MONOTONICITY:
–40°C to +85°C
q DOUBLE-BUFFERED DATA INPUTS
q SMALL 20-LEAD SSOP PACKAGE
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
DESCRIPTION
The DAC7615 is a quad, serial input, 12-bit, voltage
output digital-to-analog converter (DAC) with guar-
anteed 12-bit monotonic performance over the –40°C
to +85°C temperature range. An asynchronous reset
clears all registers to either mid-scale (800H) or zero-
scale (000H), selectable via the RESETSEL pin. The
individual DAC inputs are double buffered to allow
GND
for simultaneous update of all DAC outputs. The
device can be powered from a single +5V supply or
from dual +5V and –5V supplies.
Low power and small size makes the DAC7615 ideal
for automatic test equipment, DAC-per-pin program-
mers, data acquisition systems, and closed-loop servo-
control. The device is available in 16-pin plastic DIP,
16-lead SOIC, and 20-lead SSOP packages and is
guaranteed over the –40°C to +85°C temperature range.
VDD VREFH
Input
DAC
Register A
Register A
DAC A
VOUTA
SDI
CLK
CS
Serial-to-
Parallel
Shift
Register
12
Input
Register B
DAC
Register B
DAC B
Input
Register C
DAC
Register C
DAC C
DAC
Select
Input
Register D
DAC
Register D
DAC D
VOUTB
VOUTC
VOUTD
LOADREG
RESETSEL RESET LOADDACS VREFL VSS
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1998 Burr-Brown Corporation
PDS-1443C
Printed in U.S.A. November, 1998






DAC7615PB Datasheet, Funktion
TYPICAL PERFORMANCE CURVES: VSS = 0V (CONT)
At TA = +25°C, VDD = +5V, VSS = 0V, VREFH = +2.5V, and VREFL = 0V, representative unit, unless otherwise specified.
0.50
+85°C
0.25
LINEARITY ERROR vs CODE
(DAC C, –40°C and +85°C)
0.00
–0.25
–0.50
0.50
–40°C
0.25
0.00
–0.25
–0.50
000H
200H
400H
600H 800H A00H
Digital Input Code
C00H
E00H
FFFH
0.50
+85°C
0.25
LINEARITY ERROR vs CODE
(DAC D, –40°C and +85°C)
0.00
–0.25
–0.50
0.50
–40°C
0.25
0.00
–0.25
–0.50
000H
200H
400H
600H 800H A00H
Digital Input Code
C00H
E00H
FFFH
POSITIVE SLEW RATE and SETTLING TIME
2.75
2.25
1.75
5V
LOADDACS
0V
1.25
A
B
9
6
3
0
0.75
–3
0.25
–6
–0.25
–9
–2 –1 0 1 2 3 4 5 6 7 8
Time (µs)
NEGATIVE SLEW RATE and SETTLING TIME
2.75
9
2.25
6
1.75
1.25
0.75
0.25
A
5V
LOADDACS
0V
B
3
0
–3
–6
–0.25
–9
–2 –1 0 1 2 3 4 5 6 7 8
Time (µs)
®
DAC7615
6

6 Page









DAC7615PB pdf, datenblatt
LAYOUT
A precision analog component requires careful layout, ad-
equate bypassing, and clean, well-regulated power supplies.
As the DAC7615 offers single-supply operation, it will often
be used in close proximity with digital logic, microcontrollers,
microprocessors, and digital signal processors. The more
digital logic present in the design and the higher the switch-
ing speed, the more difficult it will be to achieve good
performance from the converter.
Because the DAC7615 has a single ground pin, all return
currents, including digital and analog return currents, must
flow through the GND pin. Ideally, GND would be con-
nected directly to an analog ground plane. This plane would
be separate from the ground connection for the digital
components until they were connected at the power entry
point of the system (see Figure 4).
The power applied to VDD (as well as VSS, if not grounded)
should be well regulated and low noise. Switching power
supplies and DC/DC converters will often have high-fre-
quency glitches or spikes riding on the output voltage. In
addition, digital components can create similar high-fre-
quency spikes as their internal logic switches states. This
noise can easily couple into the DAC output voltage through
various paths between the power connections and analog
output.
As with the GND connection, VDD should be connected to
a +5V power supply plane or trace that is separate from the
connection for digital logic until they are connected at the
power entry point. In addition, the 1µF to 10µF and 0.1µF
capacitors shown in Figure 4 are strongly recommended. In
some situations, additional bypassing may be required, such
as a 100µF electrolytic capacitor or even a “Pi” filter made
up of inductors and capacitors—all designed to essentially
lowpass filter the +5V supply, removing the high frequency
noise (see Figure 4).
+5V
Power Supply
+5V
Ground
Digital Circuits
+5V
Ground
100µF +
Optional
+ 1µF to
10µF
0.1µF
DAC7615
VDD
GND
Other
Analog
Components
FIGURE 4. Suggested Power and Ground Connections for a DAC7615 Sharing a +5V Supply with a Digital System.
®
DAC7615
12

12 Page





SeitenGesamt 12 Seiten
PDF Download[ DAC7615PB Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
DAC7615PQuad/ Serial Input/ 12-Bit/ Voltage Output DIGITAL-TO-ANALOG CONVERTERBurr-Brown Corporation
Burr-Brown Corporation
DAC7615PBQuad/ Serial Input/ 12-Bit/ Voltage Output DIGITAL-TO-ANALOG CONVERTERBurr-Brown Corporation
Burr-Brown Corporation

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche