- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98217 > THS1030CDWG4 (TEXAS INSTRUMENTS INC) 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 PDF資料下載
參數(shù)資料
| 型號： | THS1030CDWG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 18/37頁 |
| 文件大小： | 727K |
| 代理商： | THS1030CDWG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
THS1030
3V TO 5.5V, 10BIT, 30 MSPS
CMOS ANALOGTODIGITAL CONVERTER
SLAS243E NOVEMBER 1999 REVISED DECEMBER 2003
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
equivalent input resistance at AIN and ac-coupling to AIN
Some applications may require ac-coupling of the input signal to the AIN pin. Such applications can use an
ac-coupling network such as shown in Figure 29.
AIN
AVDD
R(Bias1)
R(Bias2)
Cin
Figure 29. AC-Coupling the Input Signal to the AIN Pin
Note that if the bias voltage is derived from the supplies, as shown in Figure 29, then additional filtering should
be used to ensure that noise from the supplies does not reach AIN.
Working with the input current pulse equations given in the previous section is awkward when designing
ac-coupling input networks. For such design, it is much simpler to model the AIN input as an equivalent
resistance, RAIN, from the AIN pin to a voltage source VM where
VM = (REFTS + REFBS)/2 and RAIN = 1 / (CS x fclk)
where fclk is the CLK frequency.
The high-pass 3 dB cutoff frequency for the circuit shown in Figure 29 is:
f
(
*3dB) +
1
2
p
R
IN
tot
where RINtot is the parallel combination of Rbias1, Rbias2, and RAIN. This approximation is good provided that
the clock frequency, fclk, is much higher than f(3 dB).
Note also that the effect of the equivalent RAIN and VM at the AIN pin must be allowed for when designing the
bias network dc level.
details
The above value for RAIN is derived by noting that the average AIN voltage must equal the bias voltage supplied
by the ac coupling network. The average value of VLAST in equation 8 is thus a constant voltage
VLAST = V(AIN bias) – VM
For an input voltage Vin at the AIN pin,
Qin = (Vin – VLAST) x Cs
Provided that f (3 dB) is much lower than fclk, a constant current flowing over the clock period can approximate
the input charging pulse
Iin
= Qin / tclk
= Qin x fclk
= (Vin – VLAST) x CS x fclk
(10)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THS1030IDW | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1030CPWR | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1030IDWRG4 | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1030IPWLE | 10-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1030CPWLE | 10-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THS1030CDWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030CDWRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030CPW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030CPWG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030CPWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。