PM7543FSZ Analog Devices Inc, PM7543FSZ Datasheet - Page 11

• Manufacturer Part Number: PM7543FSZ
• Description: DAC 1-CH R-2R 12-Bit 16-Pin SOIC
• Manufacturer: Analog Devices Inc

Specifications of PM7543FSZ

• Package: 16SOIC
• Resolution: 12 Bit
• Architecture: R-2R
• Digital Interface Type: Serial
• Number Of Outputs Per Chip: 1
• Output Type: Current
• Full Scale Error: ±2 LSB
• Integral Nonlinearity Error: ±1 LSB
• Settling Time: 1µs
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PM-7543
FIGURE 10: Analog/Digital Divider
The transfer function is modified when the DAC is connected in the
feedback of an operational amplifier as shown in Figure 10 and is:
tions 0000 and 0001. The four MSBs are found in the lower half of
The above transfer function is the division of an analog voltage (VREF)
by a digital word. The amplifier goes to the rails with all bits "OFF"
since division by zero is infinity. With all bits "ON," the gain is 1 (:t1
INTERFACING TO THE MC6800
As shown in Figure 11, the PM- 7543 may be interfaced to the 6800
the next bit.
0000, the eight LSBs in 0001. The data is taken from the DB? line.
decoded memory WRITE to a me.morylocation, ANI. and $2. A WRITE
to another address location transfers data from
Vo =
LSB). The gain becomes 4096 with the LSB, bit 12, "ON."
by successively executing memory WRITE instructions while ma.
nipulatingthe data between WRITEs, so that each WRITE presents
In this
The serial data loading is triggered by STB1 which is asserted by a
register.
PM.7543 INTERFACE TO THE 8085
The PM-7543'sinterfacetothe8085
serially to the DAC.
12. Note that the microprocessor's SOD line is used to present data
ANALOGDEVICES fAX-ON-DEMAND HOTLINE
(5~-~ :~~H
example,
VIMo----J!.IRFB
the most significant
11
loun
PM.7543
~)
VR£F
VDD
microprocessor is shown in Figure
6
115
bits are found in memory
+SV
input
-
Page c~
VOUT
register to DAC
loca-
-11-
FIGURE11: PM-7543
tions. The strobe 2 input is generated
justified format in registers Hand L ofthe microprocessor.
FIGURE 12: PM- 7543
Data is strobed into the PM- 7543 by executing memory write instruc-
tion and WR. Data is loaded into the DAC register with a memory
write instruction to another address location.
Serial data supplied to the PM- 7543 must be present in the right-
.
FROM
ANALOG
M~
8095
SYSTEM
.
ANALOG CIRCUITRY OMITTED
SOD
ALE
Deo
DBT
CIRCUITRY
RM
WR+W
At.
AO
u2
.5V
--'
r-
RESET
(9)
(9)AD0-1
-
-
MC6BOO Interface
80B5 Interface
OMITTED
16-61T ADDRESS
FOR
ADDRESSBUS 116>
DATA
SIMPLICITY
by decoding an address
FOR SlIolPUClTV
Ao-1O
BUS
REV.D
loca-