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ADS1220IPW bảng dữ liệu(PDF) 8 Page - Texas Instruments

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tên linh kiện ADS1220IPW
Giải thích chi tiết về linh kiện  Low-Power, Low-Noise, 24-Bit, ADC for Small-Signal Sensors
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ADS1220IPW bảng dữ liệu(HTML) 8 Page - Texas Instruments

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Hi-Z
Hi-Z
CS
SCLK
DOUT/DRDY
tp(CSDO)
tp(SCDO)
tp(CSDOZ)
CS
SCLK
DIN
ttd(CSSC)t
ttc(SC)t
ttd(SCCS)t
tw(CSH)
tw(SCH)
tw(SCL)
tsu(DI)
th(DI)
ADS1220
SBAS501B – MAY 2013 – REVISED FEBRUARY 2015
www.ti.com
6.6 SPI Timing Requirements
over operating ambient temperature range and DVDD = 2.3 V to 5.5 V (unless otherwise noted)
MIN
MAX
UNIT
td(CSSC)
Delay time, CS falling edge to first SCLK rising edge(1)
50
ns
td(SCCS)
Delay time, final SCLK falling edge to CS rising edge
25
ns
tw(CSH)
Pulse duration, CS high
50
ns
tc(SC)
SCLK period
150
ns
tw(SCH)
Pulse duration, SCLK high
60
ns
tw(SCL)
Pulse duration, SCLK low
60
ns
tsu(DI)
Setup time, DIN valid before SCLK falling edge
50
ns
th(DI)
Hold time, DIN valid after SCLK falling edge
25
ns
Normal mode, duty-cycle mode
13955
t(MOD)
SPI timeout(2)
Turbo mode
27910
t(MOD)
(1)
CS can be tied low permanently in case the serial bus is not shared with any other device.
(2)
See the SPI Timeout section for more information.
t(MOD) = 1 / f(MOD). Modulator frequency f(MOD) = 256 kHz (normal mode, duty-cycle mode) and 512 kHz (turbo mode), when using the
internal oscillator or an external 4.096-MHz clock.
NOTE: Single-byte communication is shown. Actual communication may be multiple bytes.
Figure 1. Serial Interface Timing Requirements
6.7 SPI Switching Characteristics
over operating ambient temperature range, DVDD = 2.3 V to 5.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Propagation delay time,
tp(CSDO)
DOUT load = 20 pF || 10 k
Ω to DGND
50
ns
CS falling edge to DOUT driven
Propagation delay time,
tp(SCDO)
DOUT load = 20 pF || 10 k
Ω to DGND
0
50
ns
SCLK rising edge to valid new DOUT
Propagation delay time,
tp(CSDOZ)
DOUT load = 20 pF || 10 k
Ω to DGND
50
ns
CS rising edge to DOUT high impedance
NOTE: Single-byte communication is shown. Actual communication may be multiple bytes.
Figure 2. Serial Interface Switching Characteristics
8
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Product Folder Links: ADS1220


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