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| 型號(hào)： | THS1040IPWR |
| 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, TSSOP-28 |
| 文件頁(yè)數(shù)： | 11/36頁(yè) |
| 文件大?。?/td> | 751K |
| 代理商： | THS1040IPWR |
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THS1040
SLAS290C OCTOBER 2001 REVISED OCTOBER 2004
19
www.ti.com
PRINCIPLES OF OPERATION
onboard reference generator configuration
The internal bandgap reference A1 can provide a supply-voltage-independent and temperature-independent
voltage on pin VREF.
External connections to REFSENSE control A1’s output to the VREF pin as shown in Table 1.
Table 1. Effect of REFSENSE Connection on VREF Value
REFSENSE CONNECTION
A1 OUTPUT TO VREF
SEE:
VREF pin
0.5 V
Figure 25
AGND
1 V
Figure 26
External divider junction
(1 + Ra/Rb)/2 V
Figure 27
AVDD
Open circuit
Figure 28
REFSENSE = AVDD powers the internal bandgap reference A1 down, saving power when A1 is not required.
If MODE is connected to AVDD or AVDD/2, then the voltage at VREF determines the ADC reference voltages:
REFT
+
AV
DD
2
) VREF
2
REFB
+
AV
DD
2
* VREF
2
REFT–REFB
+ VREF
_
+
_
+
VBG
ADC
References
Buffer A2
MODE =
REFSENSE
0.1
F 1 F
AGND
VREF = 0.5 V
AVDD
2
or AVDD
Figure 25. 0.5-V VREF Using the Internal Bandgap Reference A1
(9)
(10)
(11)
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| THS1040IPWRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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 |
| THS1041 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP |
| THS1041CDW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr 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 |
| THS1041CDWG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr 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 |
| THS1041CDWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr 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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