AD9742-EB Analog Devices, AD9742-EB Datasheet - Page 6

• Manufacturer Part Number: AD9742-EB
• Description: 12-Bit/ 165 MSPS TxDAC D/A Converter
• Manufacturer: Analog Devices

AD9742
DEFINITIONS OF SPECIFICATIONS
Linearity Error (Also Called Integral Nonlinearity or INL)
Linearity error is defined as the maximum deviation of the actual
analog output from the ideal output, determined by a straight line
drawn from zero to full scale.
Differential Nonlinearity (or DNL)
DNL is the measure of the variation in analog value, normalized
to full scale, associated with a 1 LSB change in digital input code.
Monotonicity
A D/A converter is monotonic if the output either increases or
remains constant as the digital input increases.
Offset Error
The deviation of the output current from the ideal of zero is
called the offset error. For IOUTA, 0 mA output is expected
when the inputs are all 0s. For IOUTB, 0 mA output is expected
when all inputs are set to 1s.
Gain Error
The difference between the actual and ideal output span. The
actual span is determined by the output when all inputs are set
to 1s minus the output when all inputs are set to 0s.
Output Compliance Range
The range of allowable voltage at the output of a current output
DAC. Operation beyond the maximum compliance limits may
cause either output stage saturation or breakdown resulting in
nonlinear performance.
Temperature Drift
Temperature drift is specified as the maximum change from the
ambient (25∞C) value to the value at either T
offset and gain drift, the drift is reported in ppm of full-scale range
(FSR) per ∞C. For reference drift, the drift is reported in ppm per ∞C.
DCOM
DVDD
OUTPUT*
RETIMED
CLOCK
PULSE GENERATOR
R
LECROY 9210
2k
SET
50
0.1 F
3.3V
CLOCK
FS ADJ
REFIO
DVDD
DCOM
SLEEP
+1.20V REF
OUTPUT
CLOCK
REFLO
SEGMENTED SWITCHES
Figure 2. Basic AC Characterization Test Setup
FOR DB11–DB3
MIN
150pF
or T
TEKTRONIX
W/OPTION 4
LATCHES
AWG-2021
MAX
DIGITAL
DATA
CURRENT SOURCE
. For
ARRAY
PMOS
3.3V
AVDD
SWITCHES
–6–
LSB
Power Supply Rejection
The maximum change in the full-scale output as the supplies are
varied from nominal to minimum and maximum specified voltages.
Settling Time
The time required for the output to reach and remain within a
specified error band about its final value, measured from the
start of the output transition.
Glitch Impulse
Asymmetrical switching times in a DAC give rise to undesired
output transients that are quantified by a glitch impulse. It is
specified as the net area of the glitch in pV-s.
Spurious-Free Dynamic Range
The difference, in dB, between the rms amplitude of the output
signal and the peak spurious signal over the specified bandwidth.
Total Harmonic Distortion
THD is the ratio of the rms sum of the first six harmonic
components to the rms value of the measured input signal. It is
expressed as a percentage or in decibels (dB).
Multitone Power Ratio
The spurious-free dynamic range containing multiple carrier
tones of equal amplitude. It measures as the difference between
the rms amplitude of a carrier tone to the peak spurious signal
in the region of a removed tone.
AD9742
ACOM
IOUTA
IOUTB
MODE
50
20pF
50
*AWG2021 CLOCK RETIMED
SUCH THAT DIGITAL DATA
TRANSITIONS ON FALLING EDGE
OF 50% DUTY CYCLE CLOCK.
100
20pF
MINI-CIRCUITS
T1-1T
ROHDE & SCHWARZ
FSEA30
SPECTRUM
ANALYZER
REV. 0