ADC1415S NXP Semiconductors, ADC1415S Datasheet - Page 26

• Manufacturer Part Number: ADC1415S
• Description: Single 14-bit ADC
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ADC1415S_SER_3
Preliminary data sheet
11.5.7 Output codes versus input voltage
11.6.1 Register description
11.6 Serial Peripheral Interface (SPI)
Table 15.
The ADC1415S serial interface is a synchronous serial communications port that allows
for easy interfacing with many commonly-used microprocessors. It provides access to the
registers that control the operation of the chip.
This interface is configured as a 3-wire type (SDIO as bidirectional pin)
Pin SCLK is the serial clock input and CS is the chip select pin.
Each read/write operation is initiated by a LOW level on CS. A minimum of three bytes will
be transmitted (two instruction bytes and at least one data byte). The number of data
bytes is determined by the value of bits W1 and W2 (see
Table 16.
[1]
[2]
V
< −1
−1
−0.9998779
−0.9997559
−0.9996338
−0.9995117
....
−0.0002441
−0.0001221
0
+0.0001221
+0.0002441
....
+0.9995117
+0.9996338
+0.9997559
+0.9998779
+1
> +1
Bit
Description
INP
Bit R/W indicates whether it is a read (1) or a write (0) operation.
Bits W1 and W0 indicate the number of bytes to be transferred after the instruction byte (see
− V
INM
Output codes
Instruction bytes for the SPI
Offset binary
00 0000 0000 0000
00 0000 0000 0000
00 0000 0000 0001
00 0000 0000 0010
00 0000 0000 0011
00 0000 0000 0100
....
01 1111 1111 1110
01 1111 1111 1111
10 0000 0000 0000
10 0000 0000 0001
10 0000 0000 0010
....
11 1111 1111 1011
11 1111 1111 1100
11 1111 1111 1101
11 1111 1111 1110
11 1111 1111 1111
11 1111 1111 1111
All information provided in this document is subject to legal disclaimers.
ADC1415S series; input buffer; CMOS or LVDS DDR digital outputs
MSB
7
R/W
A7
[1]
Rev. 03 — 12 April 2010
6
W1
A6
[2]
5
W0
A5
[2]
4
A12
A4
Two’s complement
10 0000 0000 0000
10 0000 0000 0000
10 0000 0000 0001
10 0000 0000 0010
10 0000 0000 0011
10 0000 0000 0100
....
11 1111 1111 1110
11 1111 1111 1111
00 0000 0000 0000
00 0000 0000 0001
00 0000 0000 0010
....
01 1111 1111 1011
01 1111 1111 1100
01 1111 1111 1101
01 1111 1111 1110
01 1111 1111 1111
01 1111 1111 1111
ADC1415S series
3
A11
A3
Table
2
A10
A2
17).
© NXP B.V. 2010. All rights reserved.
1
A9
A1
www.DataSheet4U.com
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
OTR pin
0
0
0
Table
LSB
0
A8
A0
26 of 39
17).