MAX1332 Datasheet, PDF (24/25 Pages) Maxim Integrated Products – 3Msps/2Msps, 5V/3V, 2-Channel, True-Differential 12-Bit ADCs

3Msps/2Msps, 5V/3V, 2-Channel, True-
Differential 12-Bit ADCs
Spurious-Free Dynamic Range (SFDR)
SFDR is a dynamic figure of merit that indicates the
lowest usable input signal amplitude. SFDR is the ratio
of the RMS amplitude of the fundamental (maximum
signal component) to the RMS value of the next-largest
spurious component, excluding DC offset. SFDR is
specified in decibels relative to the carrier (dBc).
Intermodulation Distortion (IMD)
IMD is the total power of the IM2 to IM5 intermodulation
products to the Nyquist frequency relative to the total
input power of the two input tones f_IN1 and f_IN2. The
individual input tone levels are at -7dBFS. The inter-
modulation products are as follows:
• 2nd-order intermodulation products (IM2): f_IN1 +
f_IN2, f_IN2 - f_IN1
• 3rd-order intermodulation products (IM3): 2f_IN1 -
f_IN2, 2f_IN2 - f_IN1, 2f_IN1 + f_IN2, 2f_IN2 + f_IN1
• 4th-order intermodulation products (IM4): 3f_IN1 -
f_IN2, 3f_IN2 - f_IN1, 3f_IN1 + f_IN2, 3f_IN2 + f_IN1
• 5th-order intermodulation products (IM5): 3f_IN1 -
2f_IN2, 3f_IN2 - 2f_IN1, 3f_IN1 + 2f_IN2, 3f_IN2 + 2f_IN1
Channel-to-Channel Isolation
Channel-to-channel isolation is a figure of merit that
indicates how well each analog input is isolated from
the others. The channel-to-channel isolation for the
MAX1332/MAX1333 is measured by applying a low-fre-
quency 500kHz -0.5dBFS sine wave to the on channel
while a high-frequency 900kHz -0.5dBFS sine wave is
applied to the off channel. An FFT is taken for the on
channel. From the FFT data, channel-to-channel
crosstalk is expressed in dB as the power ratio of the
500kHz low-frequency signal applied to the on channel
and the 900kHz high-frequency crosstalk signal from
the off channel.
Full-Power Bandwidth
A large -0.5dB FS analog input signal is applied to an
ADC, and the input frequency is swept up to the point
where the amplitude of the digitized conversion result
has decreased by -3dB. This point is defined as full-
power input bandwidth frequency.
Full-Linear Bandwidth
Full-linear bandwidth is the frequency at which the sig-
nal-to-noise plus distortion (SINAD) is equal to 68dB.
The amplitude of the analog input signal is -0.5dBFS.
Small-Signal Bandwidth
A small -20dBFS analog input signal is applied to an
ADC in such a way that the signal’s slew rate does not
limit the ADC’s performance. The input frequency is
then swept up to the point where the amplitude of the
digitized conversion result has decreased by -3dB.
Power-Supply Rejection (PSR)
PSR is defined as the shift in offset error when the ana-
log power supply is moved from 2.7V to 3.6V.
Pin Configuration
TOP VIEW
DV_{DD 13}
DGND 14
AV_{DD 15}
AGND 16
MAX1332
MAX1333
8 AGND
7 BIP/UNI
6 SHDN
5 REF
PART
MAX1332ETE
MAX1333ETE
AV_DD
(V)
+5
+3
Selector Guide
MAX SAMPLING RATE
(Msps)
3
2
PROCESS: BiCMOS
Chip Information
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