AD9773BSVRL Analog Devices Inc, AD9773BSVRL Datasheet - Page 17

• Manufacturer Part Number: AD9773BSVRL
• Description: IC,D/A CONVERTER,DUAL,12-BIT,CMOS,TQFP,80PIN
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9773BSVRL

• Rohs Status: RoHS non-compliant
• Settling Time: 11ns
• Number Of Bits: 12
• Data Interface: Serial, SPI™
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 410mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
• For Use With: AD9773-EBZ - BOARD EVALUATION AD9773

TERMINOLOGY
Adjacent Channel Power Ratio (ACPR)
A ratio, in dBc, between the measured power within a channel
relative to its adjacent channel.
Complex Image Rejection
In a traditional two-part upconversion, two images are created
around the second IF frequency. These images are redundant
and have the effect of wasting transmitter power and system
bandwidth. By placing the real part of a second complex
modulator in series with the first complex modulator, either
the upper or lower frequency image near the second IF can be
rejected.
Complex Modulation
The process of passing the real and imaginary components of a
signal through a complex modulator (transfer function = e
cosωt + jsinωt) and realizing real and imaginary components
on the modulator output.
Differential Nonlinearity (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.
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 1 minus the output when all inputs are set to 0.
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.
Group Delay
Number of input clocks between an impulse applied at the
device input and the peak DAC output current. A half-band FIR
filter has constant group delay over its entire frequency range.
Impulse Response
Response of the device to an impulse applied to the input.
Interpolation Filter
If the digital inputs to the DAC are sampled at a multiple rate of
f
a sharp transition band near f
appear around f
Linearity Error
Also called integral nonlinearity (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 0 to full
scale.
Monotonicity
A DAC is monotonic if the output either increases or remains
constant as the digital input increases.
DATA
(interpolation rate), a digital filter can be constructed with
DAC
(output data rate) can be greatly suppressed.
DATA
/2. Images that would typically
jωt
Rev. D | Page 17 of 60
=
Offset Error
The deviation of the output current from the ideal of 0 is called
offset error. For I
are all 0s. For I
set to 1.
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.
Pass Band
Frequency band in which any input applied therein passes
unattenuated to the DAC output.
Power Supply Rejection
The maximum change in the full-scale output as the supplies
are varied from minimum to 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.
Signal-to-Noise Ratio (SNR)
SNR is the ratio of the rms value of the measured output signal
to the rms sum of all other spectral components below the
Nyquist frequency, excluding the first six harmonics and dc.
The value for SNR is expressed in decibels.
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.
Stop-Band Rejection
The amount of attenuation of a frequency outside the pass band
applied to the DAC, relative to a full-scale signal applied at the
DAC input within the pass band.
Temperature Drift
It is specified as the maximum change from the ambient (25°C)
value to the value at either T
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.
Total Harmonic Distortion (THD)
THD is the ratio of the rms sum of the first six harmonic com-
ponents to the rms value of the measured fundamental. It is
expressed as a percentage or in decibels (dB).
OUTB
OUTA
, 0 mA output is expected when all inputs are
, 0 mA output is expected when the inputs
MIN
or T
MAX
. For offset and gain
AD9773