Data Translation DT9837, User Manual

Page: 120 / 150

Appendix A
120
Table 23: Dynamic Performance Specifications
Dynamic Performance
a
a. ENOB, SINAD, SNR, THD, and SFDR measurements were made with a 16384 point FFT using a minimum 4-term Blackman Harris window at the
maximum sampling rate.
DT9837
Specifications
DT9837A
Specifications
DT9837B and DT9837C
Specifications
Effective Number of Bits, ENOB
b
(1 kHz input, 52.734 kSPS)
–1 dBFS input:
–6 dBFS input:
b. Effective Number of Bits (ENOB) is calculated from the SINAD value with adjustment for level below full-scale of the input signal.
where, IBFS is a positive value in dB, representing the ratio of a full-scale signal to the input signal.
Gain of 1 Gain of 10 Gain of 1 Gain of 10 Gain of 1 Gain of 10
15.2 bits
15.8 bits 14.6 bits
15.3 bits 15.3 bits
16.3 bits 14.7 bits
15.6 bits 14.8 bits
16.0 bits 14.3 bits
15.4 bits
Signal to Noise and Distortion Ratio,
SINAD
c
(1 kHz input)
–1 dBFS input:
–6 dBFS input:
c. Signal to Noise and Distortion (SINAD) is the ratio of the RMS value of the input signal to the RMS sum of all other spectral components,
excluding DC.
92 dB
91 dB 88 dB
88 dB 93 dB
94 dB 89 dB
90 dB 90 dB
92 dB 87 dB
88 dB
Signal to Noise Ratio, SNR
d
(1 kHz input)
–1 dBFS input:
–6 dBFS input:
d. Signal to Noise Ratio (SNR) is the ratio of the RMS value of the input signal to the RMS sum of all other spectral components, excluding harmonics
and DC.
95 dB
91 dB 94 dB
91 dB 98 dB
95 dB 96 dB
94 dB 97 dB
93 dB 95 dB
92 dB
Total Harmonic Distortion, THD
e
(1 kHz input)
–1 dBFS input:
–6 dBFS input:
e. Total Harmonic Distortion (THD) is the ratio of the RMS value of the input signal to the RMS sum of all harmonics.
–96 dB
–104 dB –90 dB
–91 dB –95 dB
–102 dB –90 dB
–92 dB –91 dB
–99 dB –88 dB
–91 dB
Spurious Free Dynamic Range, SFDR
f
(1 kHz input)
–1 dBFS input:
–6 dBFS input:
f. Spurious Free Dynamic Range (SFDR) is the ratio of the RMS full-scale range to the RMS value of the largest peak spurious component, including
harmonics.
100 dBFS
110 dBFS 93 dBFS
101 dBFS 98 dBFS
108 dBFS 93 dBFS
100 dBFS 94 dBFS
107 dBFS 91 dBFS
100 dBFS
Noise Floor
(50
Ω
input termination) 100
μ
VRMS 10
μ
VRMS 60
μ
VRMS 10
μ
VRMS 80
μ
VRMS 9
μ
VRMS
ENOB
SINAD 1.76 – IBFS +
( )
6.02
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