AD5323ARUZ Analog Devices Inc, AD5323ARUZ Datasheet - Page 21

• Manufacturer Part Number: AD5323ARUZ
• Description: IC,D/A CONVERTER,DUAL,12-BIT,CMOS,TSSOP,16PIN
• Manufacturer: Analog Devices Inc

Specifications of AD5323ARUZ

• Settling Time: 8µs
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 2.5mW
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Number Of Channels: 2
• Resolution: 12b
• Conversion Rate: 125KSPS
• Interface Type: SER 3W SPI QSPI UW
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Architecture: Resistor-String
• Power Supply Requirement: Single
• Output Type: Voltage
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Package Type: TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS INFORMATION
TYPICAL APPLICATION CIRCUIT
The AD5303/AD5313/AD5323 can be used with a wide range
of reference voltages, especially if the reference inputs are con-
figured to be unbuffered, in which case the devices offer a full,
one-quadrant multiplying capability over a reference range of
0 V to V
More typically, the AD5303/AD5313/AD5323 may be used
with a fixed precision reference voltage. Figure 39 shows a
typical setup for the AD5303/AD5313/AD5323 when using
an external reference. If the reference inputs are unbuffered,
the reference input range is from 0 V to V
reference buffers are used, the reference range is reduced. Suit-
able references for 5 V operation are the
(2.5 V references). For 2.5 V operation, a suitable external
reference is the REF191, a 2.048 V reference.
If an output range of 0 V to V
inputs are configured as unbuffered (for example, 0 V to 5 V),
the simplest solution is to connect the reference inputs to V
As this supply may not be very accurate and may be noisy, the
AD5303/AD5313/AD5323 can be powered from the reference
voltage, for example, using a 5 V reference such as the REF195,
as shown in Figure 40. The REF195 outputs a steady supply
voltage for the AD5303/AD5313/AD5323. The supply current
required from the REF195 is 300 μA and approximately 30 μA
or 60 μA into each of the reference inputs (if unbuffered). This
is with no load on the DAC outputs. When the DAC outputs are
loaded, the REF195 also needs to supply the current to the
loads. The total current required (with a 10 kΩ load on each
output) is
The load regulation of the REF195 is typically 2 ppm/mA, which
results in an error of 2.7 ppm (13.5 μV) for the 1.36 mA current
drawn from it. This corresponds to a 0.0007 LSB error at eight
bits and 0.011 LSB error at 12 bits.
360 μA + 2(5 V/10 kΩ) = 1.36 mA
Figure 39. AD5303/AD5313/AD5323 Using External Reference
DD
AD780/REF192
WITH V
OR REF191 WITH
V
EXT
REF
DD
.
= 2.5V
DD
V
OUT
= 5V
INTERFACE
SERIAL
1µF
DD
is required when the reference
AD5303/AD5313/
V
V
SCLK
DIN
SYNC
GND
REF
REF
V
DD
A
B
AD5323
= 2.5V to 5.5V
BUF A BUF B
V
AD780
DD
DD
, but if the on-chip
V
V
OUT
OUT
A
B
and
REF192
DD
Rev. B | Page 21 of 28
.
BIPOLAR OPERATION USING THE AD5303/
AD5313/AD5323
The AD5303/AD5313/AD5323 have been designed for single-
supply operation, but bipolar operation is also achievable using
the circuit shown in Figure 41. The circuit shown has been con-
figured to achieve an output voltage range of −5 V < V
Rail-to-rail operation at the amplifier output is achievable using
an
The output voltage for any input code can be calculated as
follows:
where:
D is the decimal equivalent of the code loaded to the DAC.
N is the DAC resolution.
V
V
REF
OUT
V
R1 = R2 = 10 kΩ and V
AD820
REF
is the reference voltage input, and gain bit = 0, with
6V to 16V
REF195
Figure 41. Bipolar Operation Using the AD5303/AD5313/AD5323
V
=
GND
OUT
OUTPUT
V
= 5 V
Figure 40. Using an REF195 as Power and Reference to the
[
S
(
REF195
V
or
OUTPUT
GND
=
15V
REF
V
S
(
OP295
10
)
INTERFACE
×
×
SERIAL
1µF
(
0.1µF
D
D
2 /
2 /
as the output amplifier.
AD5303/AD5313/AD5323
N
N
0.1µF
1µF
INTERFACE
)
)
AD5303/AD5313/AD5323
10µF
AD5303/AD5313/
V
SCLK
DIN
SYNC
SERIAL
×
−
DD
GND BUF A BUF B
REF
(
5
R1
= 5 V,
A/B
V
AD5323
V
DD
10µF
+
V
DD
= 5V
R2
AD5303/AD5313/
V
V
V
SCLK
DIN
SYNC
GND BUF A BUF B
DD
REF
REF
V
10kΩ
/ )
OUT
R1
A
B
AD5323
R1
A/B
−
V
10kΩ
R2
REF
V
V
OUT
OUT
+5V
–5V
×
A
B
(
OUT
R2
AD820/
OP295
< +5 V.
/
R1
±5V
)
]