參數(shù)資料
型號: MAX19713ETN+T
廠商: Maxim Integrated Products
文件頁數(shù): 27/37頁
文件大小: 0K
描述: IC ANLG FRNT END 56-TQFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
位數(shù): 10
通道數(shù): 2
功率(瓦特): 91.8mW
電壓 - 電源,模擬: 3V
電壓 - 電源,數(shù)字: 3V
封裝/外殼: 56-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 56-TQFN-EP(7x7)
包裝: 帶卷 (TR)
MAX19713
10-Bit, 45Msps, Full-Duplex
Analog Front-End
______________________________________________________________________________________
33
Differential Nonlinearity (DNL)
Differential nonlinearity is the difference between an
actual step width and the ideal value of 1 LSB. A DNL
error specification of less than 1 LSB guarantees no
missing codes (ADC) and a monotonic transfer function
(ADC and DAC) (DAC Figure 14b).
ADC Offset Error
Ideally, the midscale transition occurs at 0.5 LSB above
midscale. The offset error is the amount of deviation
between the measured transition point and the ideal
transition point.
DAC Offset Error
Offset error (Figure 14a) is the difference between the
ideal and actual offset point. The offset point is the out-
put value when the digital input is midscale. This error
affects all codes by the same amount and usually can
be compensated by trimming.
ADC Gain Error
Ideally, the ADC full-scale transition occurs at 1.5 LSB
below full scale. The gain error is the amount of devia-
tion between the measured transition point and the
ideal transition point with the offset error removed.
ADC Dynamic Parameter Definitions
Aperture Jitter
Figure 15 shows the aperture jitter (tAJ), which is the
sample-to-sample variation in the aperture delay.
Aperture Delay
Aperture delay (tAD) is the time defined between the
rising edge of the sampling clock and the instant when
an actual sample is taken (Figure 15).
Signal-to-Noise Ratio (SNR)
For a waveform perfectly reconstructed from digital
samples, the theoretical maximum SNR is the ratio of
the full-scale analog input (RMS value) to the RMS
quantization error (residual error) and results directly
from the ADC’s resolution (N bits):
SNR(max) = 6.02 x N + 1.76 (in dB)
In reality, there are other noise sources besides quanti-
zation noise: thermal noise, reference noise, clock jitter,
etc. SNR is computed by taking the ratio of the RMS
signal to the RMS noise. RMS noise includes all spec-
tral components to the Nyquist frequency excluding the
fundamental, the first five harmonics, and the DC offset.
Signal-to-Noise and Distortion (SINAD)
SINAD is computed by taking the ratio of the RMS sig-
nal to the RMS noise. RMS noise includes all spectral
components to the Nyquist frequency excluding the
fundamental and the DC offset.
HOLD
ANALOG
INPUT
SAMPLED
DATA (T/H)
T/H
tAD
tAJ
TRACK
CLK
Figure 15. T/H Aperture Timing
0
2
1
4
3
7
6
5
000
010
001
011
100
101
110
AT STEP
011 (0.5 LSB)
AT STEP
001 (0.25 LSB)
111
DIGITAL INPUT CODE
ANALOG
OUTPUT
VALUE
Figure 14a. Integral Nonlinearity
0
2
1
4
3
6
5
000
010
001
011
100
101
DIFFERENTIAL LINEARITY
ERROR (-0.25 LSB)
DIFFERENTIAL
LINEARITY ERROR (+0.25 LSB)
1 LSB
DIGITAL INPUT CODE
ANALOG
OUTPUT
VALUE
Figure 14b. Differential Nonlinearity
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