MAX1333 Maxim Integrated Products, MAX1333 Datasheet - Page 24

• Manufacturer Part Number: MAX1333
• Description: (MAX1332 / MAX1333) True-Differential 12-Bit ADCs
• Manufacturer: Maxim Integrated Products

SFDR is a dynamic
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).
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
individual input tone levels are at -7dBFS. The inter-
modulation products are as follows:
• 2nd-order intermodulation products (IM2): f
• 3rd-order intermodulation products (IM3): 2f
• 4th-order intermodulation products (IM4): 3f
• 5th-order intermodulation products (IM5): 3f
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.
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 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.
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
3Msps/2Msps, 5V/3V, 2-Channel, True-
Differential 12-Bit ADCs
24
f
f
f
2f
IN2
IN2
IN2
______________________________________________________________________________________
IN2
, f
, 2f
, 3f
Spurious-Free Dynamic Range (SFDR)
, 3f
IN2
IN2
IN2
IN2
- f
- f
- f
Intermodulation Distortion (IMD)
IN1
- 2f
IN1
IN1
IN1
Channel-to-Channel Isolation
, 2f
, 3f
, 3f
figure of merit that indicates the
IN1
IN1
IN1
Small-Signal Bandwidth
+ f
+ f
Full-Linear Bandwidth
Full-Power Bandwidth
+ 2f
IN2
IN2
, 2f
, 3f
IN2
IN2
IN2
, 3f
IN1
+ f
+ f
IN2
IN1
IN1
+ 2f
and f
IN1
IN2
IN1
. The
IN1
IN1
IN1
+
-
-
-
then swept up to the point where the amplitude of the
digitized conversion result has decreased by -3dB.
PSR is defined as the shift in offset error when the ana-
log power supply is moved from 2.7V to 3.6V.
PROCESS: BiCMOS
MAX1332ETE
MAX1333ETE
TOP VIEW
PART
DGND
AGND
DV
AV
DD
DD
13
14
15
16
Power-Supply Rejection (PSR)
AV
(V)
+5
+3
DD
MAX1332
MAX1333
Pin Configuration
Chip Information
Selector Guide
MAX SAMPLING RATE
(Msps)
8
7
6
5
3
2
AGND
BIP/UNI
SHDN
REF