參數(shù)資料
型號(hào)： TLC542I
廠商： Texas Instruments, Inc.
英文描述： 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 INPUTS
中文描述： 8位模擬到數(shù)字與串行控制和11變換器輸入端
文件頁(yè)數(shù)： 8/11頁(yè)
文件大?。?/td> 161K
代理商： TLC542I
TLC542C, TLC542I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS075A – FEBRUARY 1989 – REVISED MARCH 1995
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
simplified analog input analysis
Using the equivalent circuit in Figure 8, 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
/512)
Equating equation 1 to equation 2 and solving for time t
c
gives
and
t
c
(1/2 LSB) = R
t
×
C
i
×
ln(512)
V
S
–(V
S
/512) = 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(512)
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
TLC542
Ci
VI
VI= Input Voltage at INPUT 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 8. Equivalent Input Circuit Including the Driving Source
相關(guān)PDF資料
PDF描述
TLC545(中文) 8-Bit Analog-To-Digital Converters With Serial Control And 11 Inputs(串行控制，76ksps,20通道，8位ADC)
TLC546(中文) 8-Bit Analog-To-Digital Converters With Serial Control And 11 Inputs(串行控制，40ksps,20通道，8位ADC)
TLC548(中文) 8-Bit Analog-To-Digital Converters With Serial Control And 11 Inputs(串行控制,45ksps,8位ADC)
TLC549(中文) 8-Bit Analog-To-Digital Converters With Serial Control And 11 Inputs(串行控制,40ksps,8位ADC)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLC542IDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8bit A/D w/Osc 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
TLC542IDW 制造商:Texas Instruments 功能描述:Multiplexer IC Multiplexer Type:Analog M
TLC542IDW 制造商:Texas Instruments 功能描述:8BIT ADC 25KSPS SMD SOIC20 542
TLC542IDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8bit A/D w/Osc 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
TLC542IDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8bit 25ksps 11ch 5V 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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