參數(shù)資料
型號(hào)： ADS62P42IRGCR
廠(chǎng)商： Texas Instruments
文件頁(yè)數(shù)： 47/78頁(yè)
文件大?。?/td> 0K
描述： IC ADC 14BIT SER/PAR 65M 64VQFN
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 2,000
位數(shù)： 14
采樣率（每秒）： 65M
數(shù)據(jù)接口： 串行，并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 64-VFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 64-VQFN 裸露焊盤(pán)（9x9）
包裝： 帶卷 (TR)
輸入數(shù)目和類(lèi)型： 2 個(gè)差分，單極
165 mA
Fs
125 MSPS
S0165-05
VCM
REFM
REFP
INTREF
EXTREF
1kW
4kW
Internal
Reference
ADS62P4x
SLAS561C
– JULY 2007 – REVISED FEBRUARY 2012
Input Common-Mode
To ensure a low-noise common-mode reference, the VCM pin is filtered with a 0.1-
μF low-inductance capacitor
connected to ground. The VCM pin is designed to directly drive the ADC inputs. The input stage of the ADC
sinks a common-mode current in the order of 165
μA (at 125 MSPS). Equation 1 describes the dependency of
the common-mode current and the sampling frequency.
(1)
This equation helps to design the output capability and impedance of the VCM driving circuit accordingly.
REFERENCE
ADS62P4X has built-in internal references REFP and REFM, requiring no external components. Design schemes
are used to linearize the converter load seen by the references; this and the on-chip integration of the requisite
reference capacitors eliminates the need for external decoupling. The full-scale input range of the converter can
be controlled in the external reference mode as explained below. The internal or external reference modes can
be selected by programming the serial interface register bit ( REF).
Figure 89. Reference Section
Internal Reference
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.
External Reference
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 in Equation 2.
Full-scale differential input pp = (Voltage forced on VCM)
× 1.33
(2)
In this mode, the 1.5-V common-mode voltage to bias the input pins has to be generated externally.
Copyright
2007–2012, Texas Instruments Incorporated
51
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參數(shù)描述
ADS62P42IRGCRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC DUAL 14B 65MSPS Para 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS62P42IRGCT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 14B 65MSPS 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS62P42IRGCTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC DUAL 14B 65MSPS Para 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS62P42RGC 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs
ADS62P43 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL CHANNEL, 14-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS
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