LTC1417 LINER [Linear Technology], LTC1417 Datasheet - Page 21

• Manufacturer Part Number: LTC1417
• Description: Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
Serial Data Output After a Conversion
Using an Internal Conversion Clock and an External Data
Clock. In this mode, data is output after the end of each
conversion and before the next conversion is started
(Figure 19). The internal clock is used as the conversion
clock and an external clock is used for the SCLK. This
mode is useful in applications where the processor acts as
a serial bus master device. This mode is SPI and
EXTCLKIN = 5
CONVST
BUSY
SCLK
D
OUT
RD
t
3
t
U
2
(SAMPLE N)
Figure 19. Internal Conversion Clock Selected. Data Transferred After Conversion
Using an External SCLK. BUSY Indicates End of Conversion
INFORMATION
U
CONVST
Hi-Z
t
CONV
HOLD
13
W
CONVST
LTC1417
BUSY
U
SCLK
D
OUT
RD
14
9
12
7
D13
t
6
MICROWIRE
the SCLK frequency is very low (less than 30kHz). To
select the internal conversion clock, tie EXTCLKIN high.
The external SCLK is applied to SCLK. RD can be used to
gate the external SCLK, such that data will clock only after
RD goes low and to three-state D
more than 16 SCLKs are provided, more zeros will be filled
in after the data word indefinitely.
MICROWIRE is a trademark of National Semiconductor Corporation.
1
t
10
t
7
12 11 10 9
2
3
4
INT
C0
SCK
MISO
SCLK
D
5
OUT
DATA N
P OR DSP
8
6
TM
7
7
compatible. It also allows operation when
6
t
t
8
V
5
9
SAMPLE
D13
IL
5
9 10 11 12 13 14 15 16
t
12
4
t
11
t
LSCLK
3
RISING CLOCK
CAPTURE ON
2
1
OUT
0
D12
t
HSCLK
after data transfer. If
ZEROS
FILL
FALLING CLOCK
CAPTURE ON
LTC1417
t
8
Hi-Z
1417 F19
21
D11
V
V
OH
OL