kad5514p Kenet Inc., kad5514p Datasheet - Page 20

• Manufacturer Part Number: kad5514p
• Description: 14-bit, 250/210/170/125msps Adc
• Manufacturer: Kenet Inc.

Mapping of the input voltage to the various data for-
mats is shown in Table 5.
KAD5514P
Figure 34. Gray Code to Binary Conversion
Figure 35. MSB-First Addressing
Figure 36. LSB-First Addressing
Preliminary
Serial Peripheral Interface
A serial peripheral interface (SPI) bus is used to facili-
tate configuration of the device and to optimize per-
formance. The SPI bus consists of chip select (CSB),
serial clock (SCLK) serial data input (SDI), and serial
data input/output (SDIO). The maximum SCLK rate is
equal to the ADC sample rate (f
for write operations and f
reads. At f
for writing and 3.79MHz for write operations. There is
no minimum SCLK rate.
The following sections describe various registers that
are used to configure the SPI or adjust performance
or functional parameters. Many registers in the avail-
able address space (0x00 to 0xFF) are not defined in
–Full Scale
–Full Scale
Mid–Scale
+Full Scale
+Full Scale
Voltage
Table 5. Input Voltage to Output Code Mapping
+ 1LSB
– 1LSB
Input
SAMPLE
00000000000000
00000000000001
10000000000000
11111111111110
11111111111111
Binary
Offset
= 250MHz, maximum SCLK is 15.63MHz
Complement
10000000000000
10000000000001
00000000000000
01111111111110
01111111111111
SAMPLE
Two’s
SAMPLE
divided by 66 for
) divided by 16
00000000000000
00000000000001
11000000000000
10000000000001
10000000000000
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Code
Gray