AD5336BRU Analog Devices Inc, AD5336BRU Datasheet - Page 16

• Manufacturer Part Number: AD5336BRU
• Description: D/A Converter (D-A) IC
• Manufacturer: Analog Devices Inc

Specifications of AD5336BRU

• Digital Ic Case Style: TSSOP
• No. Of Pins: 28
• Operating Temperature Range: -40°C To +105°C
• Peak Reflow Compatible (260 C): No
• No. Of Bits: 10 Bit
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Rohs Status: RoHS non-compliant
• Settling Time: 7µs
• Number Of Bits: 10
• Data Interface: Parallel
• Number Of Converters: 4
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 4.5mW
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD5334/AD5335/AD5336/AD5344
SUGGESTED DATABUS FORMATS
In many applications the GAIN input of the AD5334 and
AD5336 may be hard-wired. However, if more flexibility is
required, it can be included in a data bus. This enables the user
to software program GAIN, giving the option of doubling the
resolution in the lower half of the DAC range. In a bused system
GAIN may be treated as a data input since it is written to the
device during a write operation and takes effect when LDAC is
taken low. This means that the output amplifier gain of multiple
DAC devices can be controlled using a common GAIN line.
The AD5336 databus must be at least 10 bits wide and is best
suited to a 16-bit databus system.
Examples of data formats for putting GAIN on a 16-bit databus
are shown in Figure 32. Note that any unused bits above the
actual DAC data may be used for GAIN.
Figure 32. AD5336 Data Format for Byte Load with GAIN
Data on 8-Bit Bus
APPLICATIONS INFORMATION
Typical Application Circuits
The AD5334/AD5335/AD5336/AD5344 can be used with a
wide range of reference voltages and offer full, one-quadrant
multiplying capability over a reference range of 0.25 V to V
More typically, these devices may be used with a fixed, preci-
sion reference voltage. Figure 33 shows a typical setup for the
devices when using an external reference connected to the refer-
ence inputs. Suitable references for 5 V operation are the AD780
and REF192. For 2.5 V operation, a suitable external reference
would be the AD589, a 1.23 V bandgap reference.
Driving V
If an output range of zero to V
solution is to connect the reference inputs to V
may not be very accurate, and may be noisy, the devices
may be powered from the reference voltage, for example
using a 5 V reference such as the ADM663 or ADM666,
as shown in Figure 34.
X
X = UNUSED BIT
Figure 33. AD5334/AD5335/AD5336/AD5344 Using
External Reference
AD589 WITH V
*ONLY ONE CHANNEL OF V
X
AD780/REF192
WITH V
EXT
REF
X
DD
GND
OR
V
X
DD
IN
from the Reference Voltage
V
DD
= 5V
OUT
X
= 2.5V
GAIN
DB9
REF
0.1 F
DB8
AND V
AD5336
DB7
DD
OUT
V
REF
10 F
is required, the simplest
DB6
AD5334/AD5335/
SHOWN
AD5336/AD5344
*
V
DD
DB5
= 2.5V TO 5.5V
V
GND
DD
DB4
DD
. As this supply
DB3
V
OUT
DB2
*
DB1
DD
DB0
.
–16–
Bipolar Operation Using the AD5334/AD5335/AD5336/AD5344
The AD5334/AD5335/AD5336/AD5344 have been designed
for single supply operation, but bipolar operation is achievable
using the circuit shown in Figure 35. The circuit shown has been
configured to achieve an output voltage range of –5 V < V
+5 V. Rail-to-rail operation at the amplifier output is achievable
using an AD820 or OP295 as the output amplifier.
The output voltage for any input code can be calculated as
follows:
V
where:
D is the decimal equivalent of the code loaded to the DAC, N is
DAC resolution and V
With:
Figure 35. Bipolar Operation using the AD5334/AD5335/
AD5336/AD5344
O
AD589 WITH V
V
R1 = R3 = 10 kΩ
R2 = R4 = 20 kΩ and V
V
Figure 34. Using an ADM663/ADM666 as Power and
Reference to AD5334/AD5335/AD5336/AD5344
= [(1 + R4/R3) × (R2/(R1 + R2) × (2 × V
*ONLY ONE CHANNEL OF V
REF
OUT
EXT
REF
AD780/REF192
WITH V
= 2.5 V
VSET
GND
ADM663/ADM666
= (10 × D/2
V IN
OR
DD
*ONLY ONE CHANNEL OF V
6V TO 16V
V
DD
= 5V
OUT
GND
V
= 2.5V
IN
SENSE
V
SHDN
OUT(2)
0.1 F
N
0.1 F
0.1 F
) – 5
0.1 F
REF
REF
is the reference voltage input.
DD
V
AD5334/AD5335/
AND V
AD5336/AD5344
10 F
REF
10 F
= 5 V.
REF
*
V
V
V
DD
REF
DD
OUT
GND
V
AND V
AD5334/AD5335/
DD
AD5336/AD5344
= 5V
*
SHOWN
V
10k
OUT
OUT
REF
R3
GND
*
SHOWN
× D/
10k
R1
2
N
)] – R4 × V
V
R2
20k
OUT
20k
R4
*
+5V
–5V
REV. 0
REF
/R3
O
<
5V