MAX11329 datasheet(35/37 Pages) MAXIM

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�� Maxim Integrated Products 35

MAX11329–MAX11332

3Msps, 12-/10-Bit, 8-/16-Channel ADCs with

Post-Mux External Signal Conditioning Access

Definitions

Integral Nonlinearity

Integral nonlinearity (INL) is the deviation of the values

on an actual transfer function from a straight line. This

straight line can be either a best-straight-line fit or a line

drawn between the end points of the transfer function,

once offset and gain errors have been nulled. The static

linearity parameters for the MAX11329–MAX11332 are

measured using the end-points method.

Differential Nonlinearity

Differential nonlinearity (DNL) is the difference between

an actual step width and the ideal value of 1 LSB. A DNL

error specification of 1 LSB or less guarantees no miss-

ing codes and a monotonic transfer function.

Signal-to-Noise Ratio

Signal-to-noise ratio is the ratio of the amplitude of the

desired signal to the amplitude of noise signals at a

given point in time. The larger the number, the better. The

theoretical minimum analog-to-digital noise is caused by

quantization error and results directly from the ADC’s

resolution (N bits):

SNR = (6.02 x N + 1.76) dB

In reality, there are other noise sources besides quantiza-

tion noise, including thermal noise, reference noise, clock

jitter, etc. Therefore, SNR is computed by taking the ratio

of the RMS signal to the RMS noise, which includes all

spectral components minus the fundamental, the first five

harmonics, and the DC offset.

Total Harmonic Distortion

Total harmonic distortion (THD) is expressed as:

2222

345

VVVV

THD

20 log



+++





where V1 is the fundamental amplitude, and V2 through V5

are the amplitudes of the 2nd- through 5th-order harmonics.

Spurious-Free Dynamic Range

Spurious-free dynamic range (SFDR) is the ratio of the

RMS amplitude of the fundamental (maximum signal

component) to the RMS value of the next largest distor-

tion component.

Full-Power Bandwidth

Full-power bandwidth is the frequency at which the input

signal amplitude attenuates by 3dB for a full-scale input.

Table 15. Recommended Input Amplifiers

Table 16. Recommended References

REFERENCE

CHANNELS

TYPICAL APPLICATION

MAX4430

Dual supply, low noise, low distortion, high bandwidth

MAX4432

Dual supply, low noise, low distortion, high bandwidth

MAX4454

Low power, single, supply, low cost

MAX4418

Low noise, low power, high bandwidth

MAX44263

Low power, precision, CMOS input, rail-to-rail I/O

REFERENCE

TYPICAL APPLICATION

MAX6126

Ultra-high precision, ultra-low noise, wide temperature range

MAX6033

Ultra-high precision, low noise, low power, wide temperature range

MAX6043

High precision, wide temperature range

MAX6129B

Low cost, ultra-low power

MAX6003

Low cost, low power

MAX11329 Datasheet(PDF) 35 Page - Maxim Integrated Products

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