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參數(shù)資料
| 型號(hào)： | ISLA222P20IRZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 10/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SRL/SPI 72QFN |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | FemtoCharge™ |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 200M |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 830mW |
| 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： | 72-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 72-QFN（10x10） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | * |
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ISLA222P
18
FN7853.1
June 17, 2011
Analog Input
A single fully differential input (VINP/VINN) connects to the
sample and hold amplifier (SHA) of each unit A/D. The ideal
full-scale input voltage is 2.0V, centered at the VCM voltage of
0.94V as shown in Figure 27.
Best performance is obtained when the analog inputs are driven
differentially. The common-mode output voltage, VCM, should be
used to properly bias the inputs as shown in Figures 28 through
30. An RF transformer will give the best noise and distortion
performance for wideband and/or high intermediate frequency
(IF) inputs. Two different transformer input schemes are shown in
This dual transformer scheme is used to improve common-mode
rejection, which keeps the common-mode level of the input
matched to VCM. The value of the shunt resistor should be
determined based on the desired load impedance. The
differential input resistance of the ISLA222P is 600
Ω.
The SHA design uses a switched capacitor input stage (see
Figure 43), which creates current spikes when the sampling
capacitance is reconnected to the input voltage. This causes a
disturbance at the input which must settle before the next
sampling point. Lower source impedance will result in faster
settling and improved performance. Therefore a 2:1 or 1:1
transformer and low shunt resistance are recommended for
optimal performance.
A differential amplifier, as shown in the simplified block diagram
in Figure 30, can be used in applications that require
DC-coupling. In this configuration, the amplifier will typically
dominate the achievable SNR and distortion performance.
Intersil’s new ISL552xx differential amplifier family can also be
used in certain AC applications with minimal performance
degradation. Contact sales support for more information:
FIGURE 25. TYPICAL SNR PERFORMANCE vs TEMPERATURE,
DEVICE CALIBRATED AT +85°C, fIN = 105MHz
FIGURE 26. TYPICAL SFDR PERFORMANCE vs TEMPERATURE,
DEVICE CALIBRATED AT +85°C, fIN = 105MHz
Temperature Calibration (Continued)
69
70
71
72
65
67
69
71
73
75
77
79
81
83
85
-2dBFS ANALOG INPUT
-1dBFS ANALOG INPUT
TEMPERATURE (°C)
130MSPS
SN
R
(
d
B
F
S
)
200MSPS
250MSPS
75
80
85
65
70
75
80
85
-2dBFS ANALOG INPUT
-1dBFS ANALOG INPUT
TEMPERATURE (°C)
130MSPS
250MSPS
SFDR
(dBc)
200MSPS
FIGURE 27. ANALOG INPUT RANGE
1.0
1.8
0.6
0.2
1.4
VINP
VINN
VCM
0.94V
1.0V
FIGURE 28. TRANSFORMER INPUT FOR GENERAL PURPOSE
APPLICATIONS
ADT1-1WT
0.1F
A/D
VCM
ADT1-1WT
1000pF
FIGURE 29. TRANSMISSION-LINE TRANSFORMER INPUT FOR HIGH
IF APPLICATIONS
A/D
VCM
1000pF
TX-2-5-1
ADTL1-12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISLA222P25 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual 14-Bit, 250MSPS/200MSPS/130MSPS ADC |
| ISLA222P25IRZ | 制造商:Intersil Corporation 功能描述:12-BIT 250MSPS DUAL ADC, 72-PIN QFN - Trays 制造商:Intersil Corporation 功能描述:IC ADC 12BIT SRL/SPI 72QFN 制造商:Intersil 功能描述:12-BIT 250MSPS DL AD C 72-PIN |
| ISLA222S | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual 12-Bit, 250/200/125 MSPS JESD204B High Speed Serial Output ADC |
| ISLA222S12 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual 14-Bit, 250/200/125 MSPS JESD204B High Speed Serial Output ADC |
| ISLA222S12IR1Z | 制造商:Intersil Corporation 功能描述:DUAL 12-BIT, 125MSPS ADC W/HIGH SPEED SERIAL JESD204B OUTPUT - Trays 制造商:Intersil Corporation 功能描述:IC ADC 12BIT SPI/SRL 125M 48LQFN |
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