AD5315BRM-REEL AD [Analog Devices], AD5315BRM-REEL Datasheet - Page 7

• Manufacturer Part Number: AD5315BRM-REEL
• Description: 2.5 V to 5.5 V, 500 uA, 2-Wire Interface Quad Voltage Output, 8-/10-/12-Bit DACs
• Manufacturer: AD [Analog Devices]

Major-Code Transition Glitch Energy
Major-code transition glitch energy is the energy of the impulse
injected into the analog output when the code in the DAC
register changes state. It is normally specified as the area of the
glitch in nV-s and is measured when the digital code is changed by
1 LSB at the major carry transition (011 . . . 11 to 100 . . . 00,
or 100 . . . 00 to 011 . . . 11).
Digital Feedthrough
Digital feedthrough is a measure of the impulse injected into the
analog output of the DAC from the digital input pins of the
device when the DAC output is not being updated. It is specified
in nV-s and is measured with a worst-case change on the
digital input pins, e.g., from all 0s to all 1s or vice versa.
Digital Crosstalk
This is the glitch impulse transferred to the output of one DAC
at midscale in response to a full-scale code change (all 0s to all
1s and vice versa) in the input register of another DAC. It is
expressed in nV-s.
DAC-to-DAC Crosstalk
This is the glitch impulse transferred to the output of one DAC
due to a digital code change and subsequent output change of
another DAC. This includes both digital and analog crosstalk. It
is measured by loading one of the DACs with a full-scale code
change (all 0s to all 1s and vice versa) with the LDAC bit set
low and monitoring the output of another DAC. The energy of
the glitch is expressed in nV-s.
Multiplying Bandwidth
The amplifiers within the DAC have a finite bandwidth. The
multiplying bandwidth is a measure of this. A sine wave on the
reference (with full-scale code loaded to the DAC) appears on
the output. The multiplying bandwidth is the frequency at
which the output amplitude falls to 3 dB below the input.
Total Harmonic Distortion
This is the difference between an ideal sine wave and its attenuated
version using the DAC. The sine wave is used as the reference for
the DAC and the THD is a measure of the harmonics present
on the DAC output. It is measured in dB.
REV. F
–7–
Figure 2. Transfer Function with Negative Offset
FOOTROOM
Figure 3. Transfer Function with Positive Offset
AMPLIFIER
NEGATIVE
NEGATIVE
OFFSET
OFFSET
POSITIVE
ERROR
ERROR
(1mV)
OFFSET
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
DEAD BAND CODES
AD5305/AD5315/AD5325
IDEAL
ACTUAL
DAC CODE
DAC CODE
IDEAL
ACTUAL
OFFSET ERROR
GAIN ERROR
OFFSET ERROR
GAIN ERROR
PLUS
PLUS