參數(shù)資料
型號(hào)： TLC1543C
廠商： Texas Instruments, Inc.
英文描述： 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
中文描述： 10位模擬數(shù)字轉(zhuǎn)換器與串行控制和11個(gè)模擬輸入
文件頁數(shù)： 20/27頁
文件大?。?/td> 424K
代理商： TLC1543C
TLC1542C, TLC1542I, TLC1542M TLC1542Q, TLC1543C, TLC1543I, TLC1543Q
10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH
SERIAL CONTROL AND 11 ANALOG INPUTS
SLAS052E – MARCH 1992 – OCTOBER 1998
20
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
1 k
MAX
Driving Source
TLC1542/3
Ci
50 pF MAX
VI
VI= Input Voltage at A0–A10
VS= External Driving Source Voltage
Rs= Source Resistance
ri = Input Resistance
Ci= Equivalent 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
TLC1543I 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
TLC1543Q 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
TLC1542QN 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
TLC1551INW 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH PARALLEL OUTPUTS
TLC1550IFK 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH PARALLEL OUTPUTS
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TLC1543CDBG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Hi-Spd A/D Conv RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
TLC1543CDBLE 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS
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TLC1543CDBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10Bit 38kSPS SerOut On-Chip Sys Clk 11Ch RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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