參數(shù)資料
型號： ADS6224IRGZ25
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC48
封裝： 7 X 7 MM, GREEN, PLASTIC, VQFN-48
文件頁數(shù)： 41/73頁
文件大?。?/td> 3182K
代理商： ADS6224IRGZ25
www.ti.com
S0165-04
VCM
REFM
REFP
INTREF
EXTREF
4kW
1kW
Internal
Reference
ADS6xxx
Internal Reference
External Reference
Fullscale differential input pp + (Voltage forced on VCM)
1.33
(2)
COARSE GAIN AND PROGRAMMABLE FINE GAIN
SLAS543A – MAY 2007 – REVISED SEPTEMBER 2007
Figure 85. Reference Section
When the device is in internal reference mode, the REFP and REFM voltages are generated internally.
Common-mode voltage (1.5 V nominal) is output on VCM pin, which can be used to externally bias the analog
input pins.
When the device is in external reference mode, the VCM acts as a reference input pin. The voltage forced on the
VCM pin is buffered and gained by 1.33 internally, generating the REFP and REFM voltages. The differential
input voltage corresponding to full-scale is given by Equation 2.
In this mode, the range of voltage applied on VCM should be 1.45 V to 1.55 V. The 1.5-V common-mode voltage
to bias the input pins has to be generated externally.
ADS622X includes gain settings that can be used to get improved SFDR performance (compared to 0 dB gain
mode). The gain settings are 3.5 dB coarse gain and programmable fine gain from 0 dB to 6 dB. For each gain
setting, the analog input full-scale range scales proportionally, as shown in Table 22.
The coarse gain is a fixed setting of 3.5 dB and is designed to improve SFDR with little degradation in SNR. The
fine gain is programmable in 1 dB steps from 0 to 6 dB. With fine gain also, SFDR improvement is achieved, but
at the expense of SNR (there is about 1 dB SNR degradation for every 1 dB of fine gain).
46
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): ADS6225 ADS6224 ADS6223 ADS6222
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS6224IRGZR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 12b 105MSPS 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
ADS6224IRGZRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 12B 105MSPS 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
ADS6224IRGZT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 12b 105MSPS 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
ADS6224IRGZTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 12B 105MSPS 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
ADS6225 制造商:TI 制造商全稱:Texas Instruments 功能描述:DUAL CHANNEL, 12-BIT, 125/105/80/65 MSPS ADC WITH SERIAL LVDS INTERFACE
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