cxa1166k Sony Electronics, cxa1166k Datasheet - Page 21

• Manufacturer Part Number: cxa1166k
• Description: 8-bit 250 Msps Flash A/d Converter
• Manufacturer: Sony Electronics

10) The waveform monitoring pins P6 through P39 are designed to make connection to GND easily in order to
11) D/A converter (IC9) input data (waveform monitoring pins P28 to P35) are the negative logic signals of the
12) In order to maintain the accuracy of the reproduced waveform (waveform from A/D to D/A), set the
13) The input bandwidth weighs with the design of this PCB analog input circuit. Therefore, the SNR (signal-to-
14) The part number of the digital output connector mounted on the PCB is KEL 8830E-020-170S. A
reduce distortion when monitoring the waveform with an oscilloscope. As shown in the diagram below, the
distance between the measuring point and GND is 300mil, and each is equipped with a through hole of
1.2mm. When a Tektronix ground chip (part No. 013-1185-00) is mounted on the tip of a probe, the
signal – GND positions match.
decimated A/D converter outputs. Those are inverted again in the D/A converter so that the direction
(rise/fall) of reproduced waveform can agree with the A/D input signal's.
decimator such that the clock frequency of the D/A converter (IC9: CX20201A-1) is less than 100MHz.
noise ratio) should be less significant. The input circuit example to improve the SNR is shown in Fig.4. See
the measured data in Fig.s 6 to 8 for the SNR and the input circuit characteristics.
corresponding connector and cable assembly is JUNKOSHA KB0020MCG50B1.
GND
Fig. 3.
– 21 –
1.2mm
Monitoring point
CXA1166K