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參數(shù)資料
| 型號(hào)： | LMH6560MA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 緩沖放大器 |
| 英文描述： | Quad, High-Speed, Closed-Loop Buffer |
| 中文描述： | BUFFER AMPLIFIER, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁數(shù)： | 19/23頁 |
| 文件大?。?/td> | 1104K |
| 代理商： | LMH6560MA |
Application Notes
(Continued)
This effect works to both sides because the circuit will not
generate radiation but the circuit is also not sensible if ex-
posed to a certain radiation level. The same is also notice-
able when placing components flat on the printed circuit
board. Standard through hole components when placed up-
right can act as antennae causing electric fields which can
be picked up by a nearby upright component. If placed
directly at the surface of the pcb this influence is much lower.
The Effect of Variation For
e
r
When using pcb material the
e
has a certain shift over the
used frequency spectrum, so if it is necessary to work with
very accurate trace impedances, one must take into account
the frequency region for which the design is to be functional.
Figure 14
http://www.isola.de gives an example of what the
drift in
e
will be when using the pcb material produced by
Isola. If working at frequencies of 100MHz then a 50
trace
has a width of 3.04mm for standard 1.6mm FR4 pcb mate-
rial, and the same trace needs a width of 3.14mm. for
frequencies around 10GHz.
Routing Power Traces
Power line traces routed over a pcb should be kept together
for best practice. If not a ground loop will occur which may
cause more sensitivity to radiation. Also additional ground
trace length may lead to more ringing on digital signals.
Careful attention to power line distribution leads to improved
overall circuit performance. This is especially valid for analog
circuits which are more sensitive to spurious noise and other
unwanted signals.
As demonstrated in
Figure 15
the power lines are routed
from both sides on the pcb. In this case a current loop is
created as indicated by the dotted line. This loop can act as
an antenna for high frequency signals which makes the
circuit sensitive to R
radiation. A better way to route the
power traces can be seen in the following setup. (see
Figure
16
).
In this arrangement the power lines have been routed in
order to avoid ground loops and to minimize sensitivity to
noise etc. The same technique is valid when routing a high
frequent signal over a board which has no ground plane. In
that case is it good practice to route the high frequency
signal alongside a ground trace. A still better way to create a
pcb carrying high frequency signals is to use a pcb with
ground a ground plane or planes.
20064256
FIGURE 13.
20064257
FIGURE 14.
20064258
FIGURE 15.
20064259
FIGURE 16.
L
www.national.com
19
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| LMH6560MA/NOPB | 功能描述:IC BUFF QUAD H/S C-LOOP 14-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMH® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LMH6560MAX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad, High-Speed, Closed-Loop Buffer |
| LMH6560MAX/NOPB | 功能描述:IC BUFFER QD CLOSED LOOP 14-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMH® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| LMH6560MT | 制造商:Texas Instruments 功能描述:BUFFER QUAD 680MHZ CLOSED-LOOP SMD |
| LMH6560MT/NOPB | 功能描述:IC BUFF QUAD H/S C-LOOP 14-TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:LMH® 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
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