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ManualsBrandsTEXAS INSTRUMENTS ManualsData collecting ICsData acquisition IC - AD converter (ADC) External TSSOP 30
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th 2
1 2
3 4
5 6 14
15
16
CS
SCLK
SDO
SDI
DO-
15
DO-
14
DO-
13
DO-
12
DO-11
MSB
DO-10
MSB-1
DO-0
LSB
DO-1
LSB+1
DO-2
LSB+2
DI-15 DI-14 DI-12 DI-11
DI-10
DI-2 DI-1 DI-0
a
tsu 1
td 1
td 2th 1
tsu2
td 3
tw 1
tq
1/tthroughput (singleframe)
DI-13
1 2
3 4
5 6 14
15
16
CS\
SCLK
SDO
SDI
DO-
15
DO-
14
DO-
13
DO-
12
DO-11
MSB
DO-10
MSB-1
DO-0
-
DO-1
-
DO-2
LSB
DI-15 DI-14 DI-13 DI-12 DI-11
DI-10
DI-2 DI-1 DI-0
a
tsu1
td1
td2th1
tsu2
th2
td3
tw1
tq
1/t throughput (single frame)
CS
1 2
3 4
5 6 12
13
16
CS\
SCLK
SDO
SDI
DO-
15
DO-
14
DO-
13
DO-
12
DO-11
MSB
DO-10
MSB-1
DO-0
-
DO-3
-
DO-4
LSB
DI-15 DI-14 DI-13 DI-12 DI-11
DI-10
DI-4 DI-3 DI-0
a
tsu1
td1
td2th1
tsu2
th2
td3
tw1
tq
1/t throughput (single frame)
CS
ADS7950, ADS7951, ADS7952, ADS7953
ADS7954, ADS7955, ADS7956, ADS7957
ADS7958, ADS7959, ADS7960, ADS7961
SLAS605A –JUNE 2008–REVISED JANUARY 2010
www.ti.com
Figure 46. Serial Interface Timing Diagram for 12-Bit Devices ( ADS7950/51/52/53)
Figure 47. Serial Interface Timing Diagram for 10-Bit Devices (ADS7954/55/56/57)
Figure 48. Serial Interface Timing Diagram for 8-Bit Devices (ADS7958/59/60/61)
The falling edge of CS clocks out DO-15 (first bit of the four bit channel address), and remaining address bits are
clocked out on every falling edge of SCLK until the third falling edge. The conversion result MSB is clocked out
on the 4th SCLK falling edge and LSB on the 15th/13th/11th falling edge respectively for 12/10/8-bit devices. On
the 16th falling edge of SCLK, SDO goes to the 3-state condition. The conversion ends on the 16th falling edge
of SCLK.
The device reads a sixteen bit word on the SDI pin while it outputs the data on the SDO pin. SDI data is latched
on every rising edge of SCLK starting with the 1st clock as shown in Figure 46, Figure 47, and Figure 48.
CS can be asserted (pulled high) only after 16 clocks have elapsed.
24 Submit Documentation Feedback Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958,
ADS7959, ADS7960, ADS7961