KAD5512P-21Q48 Intersil, KAD5512P-21Q48 Datasheet - Page 32

• Manufacturer Part Number: KAD5512P-21Q48
• Description: IC ADC 12BIT 210MSPS SGL 48-QFN
• Manufacturer: Intersil
• Series: FemtoCharge™r

Specifications of KAD5512P-21Q48

• Number Of Bits: 12
• Sampling Rate (per Second): 210M
• Data Interface: Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 271mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-VQFN
• For Use With: KDC5512-Q48EVAL - DAUGHTER CARD FOR KAD5512KDC5512EVAL - DAUGHTER CARD FOR KAD5512
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

at three times the via pad radius will provide good heat
transfer for high power devices. The vias below the
KAD5512P may be spaced further apart as shown on the
evaluation board since it is a low-power device. The via
diameter should be small but not too small to allow solder
wicking during reflow. PCB fabrication and assembly
companies can provide specific guidelines based on the
layer stack and assembly process.
Connect all vias under the KAD5512P to AVSS. It is
important to maximize the heat transfer by avoiding
the use of “thermal relief” patterns when connecting
the vias to the internal AVSS plane(s).
Definitions
Analog Input Bandwidth is the analog input frequency
at which the spectral output power at the fundamental
frequency (as determined by FFT analysis) is reduced by
3dB from its full-scale low-frequency value. This is also
referred to as Full Power Bandwidth.
Aperture Delay or Sampling Delay is the time
required after the rise of the clock input for the sampling
switch to open, at which time the signal is held for
conversion.
Aperture Jitter is the RMS variation in aperture delay
for a set of samples.
Clock Duty Cycle is the ratio of the time the clock wave
is at logic high to the total time of one clock period.
Differential Non-Linearity (DNL) is the deviation of
any code width from an ideal 1 LSB step.
Effective Number of Bits (ENOB) is an alternate method
of specifying Signal to Noise-and-Distortion Ratio (SINAD).
In dB, it is calculated as: ENOB = (SINAD - 1.76)/6.02
Gain Error is the ratio of the difference between the
voltages that cause the lowest and highest code
transitions to the full-scale voltage less 2 LSB. It is
typically expressed in percent.
Integral Non-Linearity (INL) is the maximum
deviation of the ADC’s transfer function from a best fit
32
KAD5512P
line determined by a least squares curve fit of that
transfer function, measured in units of LSBs.
Least Significant Bit (LSB) is the bit that has the
smallest value or weight in a digital word. Its value in
terms of input voltage is V
resolution in bits.
Missing Codes are output codes that are skipped and
will never appear at the ADC output. These codes cannot
be reached with any input value.
Most Significant Bit (MSB) is the bit that has the
largest value or weight.
Pipeline Delay is the number of clock cycles between
the initiation of a conversion and the appearance at the
output pins of the data.
Power Supply Rejection Ratio (PSRR) is the ratio of
the observed magnitude of a spur in the ADC FFT, caused
by an AC signal superimposed on the power supply
voltage.
Signal to Noise-and-Distortion (SINAD) is the ratio
of the RMS signal amplitude to the RMS sum of all other
spectral components below one half the clock frequency,
including harmonics but excluding DC.
Signal-to-Noise Ratio (without Harmonics) is the ratio
of the RMS signal amplitude to the RMS sum of all other
spectral components below one-half the sampling
frequency, excluding harmonics and DC.
SNR and SINAD are either given in units of dB when the
power of the fundamental is used as the reference, or
dBFS (dB to full scale) when the converter’s full-scale
input power is used as the reference.
Spurious-Free-Dynamic Range (SFDR) is the ratio of
the RMS signal amplitude to the RMS value of the largest
spurious spectral component. The largest spurious
spectral component may or may not be a harmonic.
FS
/(2
N
-1) where N is the
October 1, 2010
FN6807.4