ADS8864_14 Datasheet, PDF (6/46 Pages) Texas Instruments – 16-Bit, 400-kSPS, Serial Interface, microPower, Miniature, Single-Ended Input, SAR Analog-to-Digital Converter

ADS8864
SBAS572A – MAY 2013 – REVISED DECEMBER 2013
4-WIRE OPERATION
t_conv-max
1/f_sample
t_ACQ
CONVST
DIN
t_su-DI-CNV
SCLK
DOUT
œœ
1
2
3 14
t_wh-DI-min
t_d-DI-DO
œœ
D15
D14 D13 D2
œœ
Figure 2. 4-Wire Operation: DIN Functions as Chip Select
www.ti.com
t_wl-CNV
15
16
D1
D0
t_d-DI-DOhz
NOTE
Figure 2 shows the timing diagram for the 4-Wire CS Mode Without a Busy Indicator
interface option. However, the timing parameters specified in Table 2 are also applicable
for the 4-Wire CS Mode With a Busy Indicator interface option, unless otherwise specified.
Refer to the Digital Interface section for specific details for each interface option.
Table 2. TIMING REQUIREMENTS: 4-Wire Operation⁽¹⁾
t_ACQ
t_conv
1/f_sample
t_wh-DI
t_wl-CNV
t_d-DI-DO
t_d-DI-DOhz
t_su-DI-CNV
t_h-DI-CNV
PARAMETER
Acquisition time
Conversion time
Time between conversions
Pulse duration: DIN high
Pulse width: CONVST low
Delay time: DIN low to MSB valid
Delay time: DIN high or last SCLK falling edge to DOUT 3-state
Setup time: DIN high to CONVST rising edge
Hold time: DIN high from CONVST rising edge (see Figure 61)
MIN
1200
500
2500
10
20
7.5
0
(1) All specifications are at T_A = –40°C to +85°C, AVDD = 3 V, and DVDD = 3 V, unless otherwise noted.
TYP MAX UNIT
ns
1300 ns
ns
ns
ns
12.3 ns
13.2 ns
ns
ns
6
Submit Documentation Feedback
Product Folder Links: ADS8864
Copyright © 2013, Texas Instruments Incorporated