AD7352BRUZ-RL Analog Devices Inc, AD7352BRUZ-RL Datasheet - Page 11

• Manufacturer Part Number: AD7352BRUZ-RL
• Description: 12-Bit Dual Diff Simult 3 MSPS ADC I.C.
• Manufacturer: Analog Devices Inc

Specifications of AD7352BRUZ-RL

• Design Resources: DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7352 (CN0040)
• Number Of Bits: 12
• Sampling Rate (per Second): 3M
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 45mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Intermodulation Distortion (IMD)
With inputs consisting of sine waves at two frequencies, fa
and fb, any active device with nonlinearities creates distortion
products at sum and difference frequencies of mfa ± nfb where
m, n = 0, 1, 2, 3, and so on. Intermodulation distortion terms
are those for which neither m nor n is equal to zero. For example,
the second-order terms include (fa + fb) and (fa − fb), while the
third-order terms include (2fa + fb), (2fa − fb), (fa + 2fb), and
(fa − 2fb).
The AD7352 is tested using the CCIF standard where two input
frequencies near the top end of the input bandwidth are used.
In this case, the second-order terms are usually distanced in
frequency from the original sine waves and the third-order
terms are usually at a frequency close to the input frequencies.
As a result, the second- and third-order terms are specified
separately. The calculation of the intermodulation distortion
is as per the THD specification, where it is the ratio of the rms
sum of the individual distortion products to the rms amplitude
of the sum of the fundamentals expressed in decibels.
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Thermal Hysteresis
Thermal hysteresis is defined as the absolute maximum change
of reference output voltage after the device is cycled through
temperature from either
Thermal hysteresis is expressed in ppm using the following
equation:
where:
V
V
or T_HYS–.
REF
REF
(25°C) is V
(T_HYS) is the maximum change of V
T_HYS+ = +25°C to T
T_HYS− = +25°C to T
V
HYS
(
ppm
REF
)
=
at 25°C.
V
REF
(
25
MAX
MIN
°
V
C
to +25°C
REF
to +25°C
)
−
(
V
25
REF
°
C
(
T
)
_
REF
HYS
at T_HYS+
)
×
AD7352
10
6