Datasheet

9
®
PCM56
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
FIGURE 11. Block Diagram of Distortion Test Circuit.
Distortion 
Analyzer
(Shiba Soku Model
725 or Equivalent)
Programmable
Gain Amp
0dB to 60dB
Low-Pass
Filter
(Toko APQ-25
or Equivalent)
DUT
(PCM58P)
Parallel-to-Serial
Conversion
Digital Code
(EPROM)
Binary 
Counter
Timing
Logic
Clock
Latch Enable
Sampling Rate = 44.1kHz x 4 (176.4kHz)
Output Frequency = 991Hz
Use 400Hz High-Pass
Filter and 30kHz
Low-Pass Filter
Meter Settings
LOW-PASS FILTER
CHARACTERISTIC
0
–20
–40
–60
–80
–100
–120
Gain (dB)
Frequency (Hz)
1 1010101010
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