SLAAE55 September   2022 DAC11001B

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Key Applications
    1. 2.1 Audio Tester
    2. 2.2 High Performance Audio
    3. 2.3 Automated Test Equipment (ATE) and Arbitrary Waveform Generation (AWG)
  5. 3DAC11001B
  6. 4Performance Test Result
  7. 5Competitor Analysis - Audio Tester Applications
  8. 6Summary
  9. 7References

4 Performance Test Result

This document compares performance data taken on the DAC11001B with data for similar devices available in the market. The total harmonic distortion (THD) and total harmonic distortion, plus noise (THD+N), evaluates high-fidelity tones. The APx555B high-performance audio analyzer used to measure signal chain performance.

Table 4-1 and Figure 4-1 compare the spectrum performance of the DAC11001B and a competitor part while generating a 1 kHz sine tone with a 10 kSPS update rate and 9 Vpp amplitude.

The DAC11001B signals chain provides -115dB THD and -105 dB THD+N performance, which is almost a 20 dB improvement in the distortion over the competitor's performance.

Table 4-1 Distortion Performance at 1 kHz DAC Output
Device Frequency THD THD+N
DAC11001B 1 kHz -115 dB -105 dB
COMPETITOR 1 kHz -96 dB -95 dB
GUID-20220901-SS0I-Z4MH-K9QX-C857VG9RL2NR-low.png Figure 4-1 Spectrum DAC11001B vs Competitor – 1 kHz, 10 kSPS Update Rate, 9Vpp
Table 4-2 Test Condition
Parameter Value
Pattern Sine
Output voltage 9 Vp-p
DAC output signal frequency 1 kHz to 20kHz
DAC update rate 768 kSPS
SPI, SCLK frequency 38.4 MHz
Reference voltage ±4.5 V

Figure 4-2 and Figure 4-3 show the THD and THD+N performance of the DAC11001B and competitor part across frequency (1 kHz to 20 kHz) at 768 kSPS update rate.

GUID-20220901-SS0I-XCXG-3KPL-WG367JLZCHVQ-low.png Figure 4-2 THD Performance
GUID-20220901-SS0I-NR0D-57X5-GQWG3GFJHGRK-low.png Figure 4-3 THD+N Performance