參數(shù)資料
型號： ADS62P44IRGCRG4
廠商： Texas Instruments
文件頁數(shù)： 44/78頁
文件大?。?/td> 0K
描述： IC ADC 14BIT SER/PAR 105M 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）： 105M
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
安裝類型： 表面貼裝
封裝/外殼： 64-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 64-VQFN 裸露焊盤（9x9）
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 2 個差分，單極
f Frequency MHz
0
1
2
3
4
5
6
7
8
9
0
100
200
300
400
500
600
C
Capacitance
pF
G082
S0163-03
INP
INM
VCM
1:1
ADS62P4x
25 W
0.1 F
m
0.1 F
m
SLAS561C
– JULY 2007 – REVISED FEBRUARY 2012
Figure 85. ADC Analog Input Capacitance (Cin) Across Frequency
Using RF-Transformer Based Drive Circuits
Figure 86 shows a configuration using a single 1:1 turns ratio transformer (for example, Coilcraft WBC1-1) that
can be used for low input frequencies (about 100 MHz). The single-ended signal is fed to the primary winding of
the RF transformer. The transformer is terminated on the secondary side. Putting the termination on the
secondary side helps to shield the kickbacks caused by the sampling circuit from the RF transformer
’s leakage
inductances. The termination is accomplished by two resistors connected in series, with the center point
connected to the 1.5-V common mode (VCM). The value of the termination resistors (connected to common
mode) has to be low (
<100 ) to provide a low-impedance path for the ADC common-mode switching currents.
Figure 86. Drive Circuit at Low Input Frequencies
At high input frequencies, the mismatch in the transformer parasitic capacitance (between the windings) results
in degraded even-order harmonic performance. Connecting two identical RF transformers back-to-back helps
minimize this mismatch, and good performance is obtained for high frequency input signals. Figure 87 shows an
example using two transformers (Coilcraft WBC1-1). An additional termination resistor pair (enclosed within the
shaded box) may be required between the two transformers to improve the balance between the P and M sides.
The center point of this termination must be connected to ground.
Copyright
2007–2012, Texas Instruments Incorporated
49
相關(guān)PDF資料
PDF描述
ADS62P44IRGCR IC ADC 14BIT SER/PAR 105M 64VQFN
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS62P44IRGCT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 14B 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
ADS62P44IRGCTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC DUAL 14B 105MSPS 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
ADS62P44RGC 制造商:TI 制造商全稱:Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs
ADS62P45 制造商:TI 制造商全稱:Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs
ADS62P45_08 制造商:TI 制造商全稱: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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