AD5542AACPZ-REEL7 Analog Devices Inc, AD5542AACPZ-REEL7 Datasheet - Page 16

• Manufacturer Part Number: AD5542AACPZ-REEL7
• Description: 16bit, 2LSB, 2.7-5.5V With CLR, Vlogic
• Manufacturer: Analog Devices Inc
• Series: nanoDAC™r

Specifications of AD5542AACPZ-REEL7

• Design Resources: High Precision Digital-to-Analog Conversion Using the 16-Bit AD5542/1, ADR421, and AD8628 (CN0079) How to Achieve High Precision Voltage Level Setting Using AD5541A/42A (CN0169)
• Settling Time: 1µs
• Number Of Bits: 16
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 6.05mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-WFQFN, CSP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AD5542AACPZ-REEL7; AD5542AACPZ-REEL7TR

AD5512A/AD5542A
Assuming a perfect reference, the unipolar worst-case output
voltage can be calculated from the following equation:
where:
V
D is the code loaded to DAC.
N is the resolution of the DAC.
V
V
V
INL is the integral nonlinearity in volts.
BIPOLAR OUTPUT OPERATION
With the aid of an external op amp, the AD5512A/AD5542A
can be configured to provide a bipolar voltage output. A typical
circuit is shown in Figure 32. The matched bipolar offset resistors,
R
this bipolar output swing, typically R
shows the transfer function for this output operating mode.
Also provided on the AD5542A are a set of Kelvin connections
to the analog ground inputs. The example includes the
FB
OUT−UNI
REF
GE
ZSE
and R
is the gain error in volts.
is the reference voltage applied to the part.
is the zero-scale error in volts.
V
OUT
is the unipolar mode worst-case output.
INV
−
UNI
, are connected to an external op amp to achieve
=
2
D
N
×
(
V
REF
+
V
GE
)
+
V
FB
ZSE
INTERFACE
= R
SERIAL
+
INV
INL
= 28 kΩ. Table 10
0.1µF
CS
DIN
SCLK
LDAC
V
+5V
DGND AGNDF
DD
ADR421
AD5512A/
AD5542A
+2.5V
Figure 32. Bipolar Output
REFF
0.1µF
Rev. 0 | Page 16 of 24
10µF
REFS
AGNDS
R
INV
R
R
FB
FB
V
2.5 V reference and the
reference buffer.
Table 10. AD5542A Bipolar Code Table
MSB
1111 1111 1111 1111
1000 0000 0000 0001
1000 0000 0000 0000
0111 1111 1111 1111
0000 0000 0000 0000
Assuming a perfect reference, the worst-case bipolar output
voltage can be calculated from the following equation:
where:
V
V
V
RD is the R
A is the op amp open-loop gain.
OUT
OUT−BIP
OUT−UNI
OS
DAC Latch Contents
INV
is the external op amp input offset voltage.
V
OUT
EXTERNAL
is the bipolar mode worst-case output
is the unipolar mode worst-case output.
OP AMP
+5V
–5V
−
FB
BIP
and R
=
UNIPOLAR
OUTPUT
[(
LSB
V
INV
OUT
resistor matching error.
−
AD8628
UNI
Analog Output
+V
+V
0 V
−V
−V
+
V
REF
REF
REF
REF
OS
1
low offset and zero-drift
× (32,767/32,768)
× (1/32,768)
× (1/32,768)
× (32,768/32,768) = −V
+
)(
2
2 (
+
A
+
RD
RD
)
)
−
V
REF
1 (
+
RD
REF
)]