參數(shù)資料
型號(hào)： TLV1543MFK
廠商： Texas Instruments, Inc.
英文描述： 3.3-V 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
中文描述： 3.3 V的10位模擬數(shù)字轉(zhuǎn)換器與串行控制和11個(gè)模擬輸入
文件頁(yè)數(shù)： 17/18頁(yè)
文件大?。?/td> 295K
代理商： TLV1543MFK
TLV1543C, TLV1543M
3.3-V 10-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SLAS072C – DECEMBER 1992 – REVISED MARCH 1995
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
simplified analog input analysis
Using the equivalent circuit in Figure 17, the time required to charge the analog input capacitance from 0 to V
S
within 1/2 LSB can be derived as follows:
The capacitance charging voltage is given by
V
C
= V
S
1–e–t
c
/R
t
C
i
)
(1)
where
R
t
= R
s
+ r
i
The final voltage to 1/2 LSB is given by
(2)
V
C
(1/2 LSB) = V
S
– (V
S
/2048)
Equating equation 1 to equation 2 and solving for time t
c
gives
and
t
c
(1/2 LSB) = R
t
×
C
i
×
ln(2048)
V
S
–(V
S
/2048) = V
S
1–e
)
(3)
–t
c
/R
t
C
i
(4)
Therefore, with the values given the time for the analog input signal to settle is
(5)
t
c
(1/2 LSB) = (R
s
+ 1 k
)
×
60 pF
×
ln(2048)
This time must be less than the converter sample time shown in the timing diagrams.
Rs
ri
VS
VC
50 pF MAX
1 k
MAX
Driving Source
TLV1543
Ci
VI
VI= Input Voltage at A0–A10
VS= External Driving Source Voltage
Rs= Source Resistance
ri = Input Resistance
Ci= Input Capacitance
Driving source requirements:
Noise and distortion for the source must be equivalent to the
resolution of the converter.
Rs must be real at the input frequency.
Figure 17. Equivalent Input Circuit Including the Driving Source
相關(guān)PDF資料
PDF描述
TLV1549C 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL
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TLV1549MFK 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLV1543MFKB 制造商:Rochester Electronics LLC 功能描述:- Bulk
TLV1543MJ 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.3V 10 BIT ANALOG TO DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
TLV1543MJB 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.3V 10 BIT ANALOG TO DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
TLV1544 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 4/8 ANALOG INPUTS
TLV1544C 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 4/8 ANALOG INPUTS
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