参数资料
型号: TLC2574IDWR
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封装: GREEN, PLASTIC, SOP-20
文件页数: 8/48页
文件大小: 1092K
代理商: TLC2574IDWR
TLC3574, TLC3578, TLC2574, TLC2578
5V ANALOG, 3/5V DIGITAL, 14/12BIT, 200KSPS, 4/8CHANNEL
SERIAL ANALOGTODIGITAL CONVERTERS WITH ±10V INPUTS
SLAS262C OCTOBER 2000 REVISED MAY 2003
16
WWW.TI.COM
timing requirements over recommended operating free-air temperature range, AVDD = 5 V,
DVDD = 5 V, VREFP = 4 V, VREFM = 0 V, SCLK frequency = 25 MHz (unless otherwise noted) (continued)
CSTART trigger
PARAMETERS
MIN
TYP
MAX
UNIT
td(12)
Delay time, delay from CSTART rising edge to EOC falling edge, at 10-pF
load
0
15
21
ns
tw(4)
Pulse width of CSTART low, at 25-pF load (see Note 13)
t(sample_reg)+0.4
s
td(13)
Delay time, delay from CSTART rising edge to CSTART falling edge, at 25-pF
load (see Note 13 and 14)
t(conv)+15
ns
td(14)
Delay time, delay from CSTART rising edge to INT falling edge, at 10-pF
load (see Note 13 and 14)
t(conv)+15
t(conv)+21
ns
td(15)
Delay time, delay from CSTART falling edge to INT rising edge, at 10-pF
load
0
6
ns
NOTES: 13. The pulse width of the CSTART must be not less than the required sampling time.
The delay from CSTART rising edge to following CSTART falling edge must be not less than the required conversion time.
The delay from CSTART rising edge to the INT falling edge is equal to the conversion time.
14. The maximum rate of SCLK is 25 MHz for normal long sampling and 10 MHz for normal short sampling.
t(conv)
OR
tw(4)
td(13)
td(12)
td(14)
td(15)
CSTART
EOC
INT
Figure 4. Critical Timing for Extended Sampling (CSTART Trigger)
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