5962-9176401MXA Analog Devices Inc, 5962-9176401MXA Datasheet - Page 7

• Manufacturer Part Number: 5962-9176401MXA
• Manufacturer: Analog Devices Inc

Specifications of 5962-9176401MXA

• Number Of Channels: 4
• Resolution: 12b
• Conversion Rate: 167KSPS
• Interface Type: Parallel
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): ±5/±15V
• Settling Time: 10us
• Architecture: R-2R
• Power Supply Requirement: Single/Dual
• Output Type: Voltage
• Single Supply Voltage (min): 4.75V
• Single Supply Voltage (max): 5.25V
• Dual Supply Voltage (min): ±4.75V
• Dual Supply Voltage (max): ±15.75V
• Operating Temp Range: -55C to 125C
• Operating Temperature Classification: Military
• Mounting: Through Hole
• Pin Count: 28
• Lead Free Status / Rohs Status: Not Compliant

REV. C
See Figure 1 for a simplified I/O logic diagram. The register
select inputs A0 and A1 select individual DAC registers “A”
(binary code 00) through “D” (binary code 11). Decoding of
the registers is enabled by the CS input. When CS is high no
decoding takes place, and neither the writing nor the reading of
the input registers is enabled. The loading of the second bank of
registers is controlled by the LDAC input. By taking CS low
while CS is high, all output registers can be updated simulta-
neously. Note that the t
all DACs is a minimum of 170 ns.
The R/W input, when enabled by CS, controls the writing to
and reading from the input register.
Coding
Both the DAC-8412 and DAC8413 use binary coding. The
output voltage can be calculated by:
where N is the digital code in decimal.
RESET
The RESET function can be used either at power-up or at any
time during the DAC’s operation. The RESET function is inde-
pendent of CS. This pin is active LOW and sets the DAC out-
put registers to either center code for the DAC8412, or zero
code for the DAC8413. The reset to center code is most useful
when the DAC is configured for bipolar references and an out-
put of zero volts after reset is desired.
Supplies
Supplies required are V
be set between –15 volts and 0 volts. V
its operating range is between +5 and +15 volts.
V
function. It is normally connected to +5 volts. This pin is a
logic reference input only. It does not supply current to the de-
vice. If you are not using the readback function, V
hardwired to V
DAC8412, it does supply currents to the digital outputs when
readback is used.
Amplifiers
Unlike many voltage output DACs, the DAC8412 features buff-
ered voltage outputs. Each output is capable of both sourcing
and sinking 5 mA at 10 volts, eliminating the need for external
RESET
DATA
LDAC
LOGIC
R/W
*NOTE: THE SIGNALS RDA, WRA, ETC., ARE INTERNAL CONTROL SIGNALS.
THEY ARE INCLUDED FOR CLARIFICATION ONLY.
CS
A0
A1
is the digital output reference voltage for the readback
ADDRESS
DECODE
V
OUT
DD
. While V
Figure 1. I/O Logic Diagram
DECODE
V
R/W
REFL
SS
LWD
, V
LOGIC
*RDA
*WRA
*RDD
*WRD
required pulse width for updating
DD
(V
and V
REFL
does not supply current to the
INPUT
REG A
_V
4096
LOGIC
12
DD
REFL
12
is the positive supply;
. The V
OUTPUT
) * N
REG A
LOGIC
SS
12
can be
supply can
AMPLIFIER
DAC A
TO
–7–
amplifiers in most applications. These amplifiers are short cir-
cuit protected.
Careful attention to grounding is important to accurate opera-
tion of the DAC8412. This is not because the DAC8412 is
more sensitive than other 12-bit DACs, but because with four
outputs and two references there is greater potential for ground
loops. Since the DAC8412 has no analog ground, the ground
must be specified with respect to the reference.
Reference Configurations
Output voltage ranges can be configured as either unipolar or
bipolar, and within these choices a wide variety of options ex-
ists. The unipolar configuration can be either positive or nega-
tive voltage output, and the bipolar configuration can be either
symmetrical or nonsymmetrical.
Figure 3 (Symmetrical Bipolar Operation) shows the DAC8412
configured for 10 volt operation. Note: See the AD688 data
sheet for a full explanation of reference operation. Adjustments may
not be required for many applications since the AD688 is a very
high accuracy reference. However if additional adjustments are
required, adjust the DAC8412 full scale first. Begin by loading
the digital full-scale code (FFF
just potentiometer to attain a DAC output voltage of 9.9976
volts. Then, adjust the Balance Adjust to set the center scale
output voltage to 0.000 volts.
The 0.2 F bypass capacitors shown at the reference inputs in
Figure 3 should be used whenever 10 volt references are used.
Applications with single references or references to 5 volts
may not require the 0.2 F bypassing. The 6.2
series with the output of the reference amplifier is to keep the
amplifier from oscillating with the capacitive load. We have
100k
GAIN
INPUT
BALANCE
100k
Figure 3. Symmetrical Bipolar Operation
REF10
+15V
Figure 2. Unipolar +10 V Operation
OUTPUT
+
TRIM
12
5
+15V
AD688
AD588
6
8
10k
4
39k
13
For
For
+10V OPERATION
DAC8412/DAC8413
OP-400
H
7
), and then adjust the Gain Ad-
10v
5v
0.2 F
1 F
V
V
REFL
REFH
14
15
1
3
0.2 F
0.2 F
6.2
5 OR 10V OPERATION
6.2
DAC8412
DAC8413
resistor in
OR
V
V
DAC8412
DAC8413
REFH
REFL
OR