HI3-5700J-5 查看數據表（PDF） - Intersil

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HI3-5700J-5

8-Bit, 20 MSPS Flash A/D Converter

Intersil 

HI-5700

Glossary of Terms

Aperture Delay: Aperture delay is the time delay between

the external sample command (the rising edge of the clock)

and the time at which the signal is actually sampled. This

delay is due to internal clock path propagation delays.

Aperture Jitter: This is the RMS variation in the aperture delay

due to variation of internal φ1 and φ2 clock path delays and

variation between the individual comparator switching times.

Differential Linearity Error (DNL): The differential linearity

error is the difference in LSBs between the spacing of the

measured midpoint of adjacent codes and the spacing of ideal

midpoints of adjacent codes. The ideal spacing of each

midpoint is 1.0 LSB. The range of values possible is from -1.0

LSB (which implies a missing code) to greater than +1.0 LSB.

Full Power Input Bandwidth: Full power input bandwidth is

the frequency at which the amplitude of the fundamental of

the digital output word has decreased 3dB below the

amplitude of an input sine wave. The input sine wave has a

peak-to-peak amplitude equal to the reference voltage. The

bandwidth given is measured at the specified sampling

frequency.

Full Scale Error (FSE): Full Scale Error is the difference

between the actual input voltage of the 254 to 255 code

transition and the ideal value of VREF+ - 1.5 LSB. This error

is expressed in LSBs.

LSB: Least Significant Bit = (VREF + - VREF-)/256. All HI-

5700 specifications are given for a 15.6mV LSB size VREF+

= 4.0V, VREF- = 0.0V.

Offset Error (VOS): Offset error is the difference between the

actual input voltage of the 0 to 1 code transition and the ideal

value of VREF- + 0.5 LSB, VOS Error is expressed in LSBs.

Power Supply Rejection Ratio (PSRR): PSRR is

expressed in LSBs and is the maximum shift in code

transition points due to a power supply voltage shift. This is

measured at the 0 to 1 code transition point and the 254 to

255 code transition point with a power supply voltage shift

from the nominal value of 5.0V.

Signal to Noise Ratio (SNR): SNR is the ratio in dB of the

RMS signal to RMS noise at specified input and sampling

frequencies.

Signal to Noise and Distortion Ratio (SINAD): SINAD is

the ratio in dB of the RMS signal to the RMS sum of the

noise and harmonic distortion at specified input and

sampling frequencies.

Total Harmonic Distortion (THD): THD is the ratio in dBc of

the RMS sum of the first five harmonic components to the

RMS signal for a specified input and sampling frequency.

Integral Linearity Error (INL): The integral linearity error is the

difference in LSBs between the measured code centers and

the ideal code centers. The ideal code centers are calculated

using a best fit line through the converter’s transfer function.

4-1501

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