kad5612p Kenet Inc., kad5612p Datasheet - Page 18

• Manufacturer Part Number: kad5612p
• Description: Dual 12-bit, 250/210/170/125msps A/d Converter
• Manufacturer: Kenet Inc.

Mapping of the input voltage to the various data for-
mats is shown in Table 5.
KAD5612P
Figure 33. Gray Code to Binary Conversion
Figure 34. MSB-First Addressing
Figure 35. LSB-First Addressing
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
Table 5. Input Voltage to Output Code Mapping
+Full Scale
+Full Scale
–Full Scale
–Full Scale
Mid–Scale
Voltage
+ 1LSB
– 1LSB
Input
SAMPLE
000000000000
000000000001
100000000000
111111111110
111111111111
= 250MHz, maximum SCLK is 15.63MHz
Binary
Offset
Complement
100000000000
100000000001
000000000000
011111111110
011111111111
SAMPLE
Two’s
SAMPLE
divided by 66 for
) divided by 16
000000000000
000000000001
110000000000
100000000001
100000000000
Code
Gray
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