- 您現在的位置：買賣IC網 > PDF目錄384005 > TLC549C (Texas Instruments, Inc.) 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL PDF資料下載
參數資料
| 型號： | TLC549C |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL |
| 中文描述： | 8位模擬數字轉換器與串行控制 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 167K |
| 代理商： | TLC549C |
TLC548C, TLC548I, TLC549C, TLC549I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS067C – NOVEMBER 1983 – REVISED SEPTEMBER 1996
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATIONS INFORMATION
simplified analog input analysis
Using the equivalent circuit in Figure 2, 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
V
S
–(V
S
/512) = V
S
1–e
(3)
–t
c
/R
t
C
i
)
and
t
c
(1/2 LSB) = R
t
×
C
i
×
ln(512)
Therefore, with the values given the time for the analog input signal to settle is
(4)
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.
(5)
Rs
ri
VS
VC
1 k
MAX
Driving Source
TLC548/9
VI
VI= Input Voltage at ANALOG IN
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.
Ci
55 pF MAX
Figure 2. Equivalent Input Circuit Including the Driving Source
相關PDF資料 |
PDF描述 |
|---|---|
| TLC549I | 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL |
| TLE2027AMFK | RES 10.0-OHM 1% 0.063W 100PPM THK-FILM SMD-0402 TR-7-PA2MM |
| TLE2027MFK | EXCALIBUR LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS |
| TLE2027MP | EXCALIBUR LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS |
| TLE2027Y | EXCALIBUR LOW-NOISE HIGH-SPEED PRECISION OPERATIONAL AMPLIFIERS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TLC549CD | 功能描述:模數轉換器 - ADC 8bit A/D RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC549CDG4 | 功能描述:模數轉換器 - ADC 8-Bit 40kSPS Serial Out Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC549CDR | 功能描述:模數轉換器 - ADC 8-Bit 40kSPS Serial Out Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC549CDRG4 | 功能描述:模數轉換器 - ADC 8-Bit 40kSPS Serial Out Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC549CP | 功能描述:模數轉換器 - ADC 8bit A/D RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
發(fā)布緊急采購，3分鐘左右您將得到回復。