DAC667JP BURR-BROWN [Burr-Brown Corporation], DAC667JP Datasheet - Page 6

• Manufacturer Part Number: DAC667JP
• Description: Microprocessor-Compatible 12-BIT DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

full scale (–10V) for an output transition from +10V to
–10V. Figure 4d shows the major carry glitch response for
input code transitions 7FF
7FF
Unlike the Analog Devices AD667, the Burr-Brown DAC667
does not require an external capacitor (C
R
Brown DAC667 increases the settling time about one micro-
second. The DAC667 settling time is specified at 7 s maxi-
mum. The AD667 is specified at 4 s maximum.
INSTALLATION
POWER SUPPLY CONNECTIONS
Note that the metal lid of the ceramic-packaged DAC667 is
connected to –V
circuits in tightly spaced installations.
Power supply decoupling capacitors should be added as
shown in Figure 5. Best settling performance occurs using a
1 F to 10 F tantalum capacitor at –V
less critical settling time may be able to use 0.01 F at –V
as well as at +V
the DAC667 package.
DAC667 features separate digital and analog power supply
returns to permit optimum connections for low noise and
FIGURE 4. Settling Time Performance, Z
SPAN
HEX
–10
–15
–20
20
15
10
–5
to eliminate overshoot. Using the 20pF with the Burr-
5
0
.
Data
= 000
C
(c) MINUS FULL SCALE SETTLING, +10V TO –10V
f
= 0
®
HEX
CC
DAC667
EE
(a) ± FULL SCALE OUTPUT SWING
. The capacitors should be located close to
. Take care to avoid accidental short
HEX
Data = FFF
1µs/Division
2µs/Division
to 800
HEX
HEX
V
CS
EE
OUT
. Applications with
and for 800
LOAD
f
= 20pF) across
Data
= 000
= 2k || 500pF.
C
f
HEX
= 0
HEX
4
2
0
5
0
EE
to
6
high speed performance. It is recommended that both power
ground (pin 16) and analog ground (AGND, pin 5) be
connected directly to a ground plane under the package. If a
ground plane is not used, connect the AGND and power
ground pins together close to the package. Since the refer-
ence point for V
important to connect the load directly to the AGND pin.
The change in current in the AGND pin due to an input data
word change from 000
OUTPUT VOLTAGE SWING
AND RANGE CONNECTIONS
The DAC667 output amplifier can provide 10V output
swing while operating on
Devices AD667 requires a minimum of 12.5V to achieve
an output swing of 10V.
Internal scaling resistors provided in the DAC667 may be
connected to produce bipolar output voltage ranges of 10V,
or 0 to +10V. Refer to Figures 6, 7 and 8. Connections for
various output ranges are shown in Table III.
The internal feedback resistors (5k ) and the bipolar offset
resistor (9.95k ) are trimmed to an absolute tolerance of
about 10%.
250
200
150
100
5V or 2.5V or unipolar output voltage ranges of 0 to +5V
50
0
Data =
7FF
(b) PLUS FULL SCALE SETTLING, –10V TO +10V
H
OUT
(d) MAJOR CARRY GLITCH
and V
HEX
Data = 800
2µs/Division
1µs/Division
REF OUT
to FFF
11.4V supplies. The Analog
H
V
is the AGND pin, it is also
CS
OUT
HEX
is only 1mA.
Data = 7FF
C
f
= 0
H
+10
4
2
0
0