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參數(shù)資料
| 型號： | MAX4547EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches |
| 中文描述： | DUAL 1-CHANNEL, AUDIO/VIDEO SWITCH, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 166K |
| 代理商： | MAX4547EEE |
_______________T heory of Operation
Logic -Level T ranslators
The MAX4545/MAX4546/MAX4547 are constructed as
high-frequency “T” switches, as shown in Figure 1. The
logic-level input, IN_, is translated by amplifier A1 into a
V+ to V- logic signal that drives amplifier A2. (Amplifier
A2 is an inverter for normally closed switches.)
Amplifier A2 drives the gates of N-channel MOSFETs
N1 and N2 from V+ to V-, turning them fully on or off.
The same signal drives inverter A3 (which drives the
P-channel MOSFETs P1 and P2) from V+ to V-, turning
them fully on or off, and drives the N-channel MOSFET
N3 off and on.
The logic-level threshold is determined by V+ and
GND_. The voltage on GND_ is usually at ground
potential, but it may be set to any voltage between
(V+ - 2V) and V-. When the voltage between V+ and
GND_ is less than 2V, the level translators become very
slow and unreliable. Since individual switches in each
package have individual GND_ pins, they may be set to
different voltages. Normally, however, they should all
be connected to the ground plane.
S witc h On Condition
When the switch is on, MOSFETs N1, N2, P1, and P2
are on and MOSFET N3 is off. The signal path is COM_
to NO_, and because both N-channel and P-channel
MOSFETs act as pure resistances, it is symmetrical
(i.e., signals may pass in either direction). The off
MOSFET, N3, has no DC conduction, but has a small
amount of capacitance to GND_. The four on
MOSFETs also have capacitance to ground that,
together with the series resistance, forms a lowpass fil-
ter. All of these capacitances are distributed evenly
along the series resistance, so they act as a transmis-
sion line rather than a simple R-C filter. This helps to
explain the exceptional 300MHz bandwidth when the
switches are on.
M
Quad/Dual, Low-Voltage,
Bidirec tional RF/Video S witc hes
8
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
NAME
FUNCTION*
MAX4545
1, 10, 11,
20
IN_
Digital Control Input
PIN
3, 6, 8, 13,
15, 18
GND_
RF and Logic Ground. Grounds are not internally connected to each other,
and should all be connected to a ground plane (see Grounding section).
16
V+
Positive Supply-Voltage Input (analog and digital)
2, 9, 12, 19
COM_
Analog Switch Common** Terminals
—
NC_
Analog Switch Normally Closed** Terminals
4, 7, 14, 17
NO_
Analog Switch Normally Open** Terminals
5
V-
Negative Supply-Voltage Input. Connect to ground plane for single-supply
operation.
MAX4546
1, 16
3, 7, 10, 14
12
2, 8, 9, 15
6, 11
4, 13
5
MAX4547
1, 9
4, 6, 12, 14
7, 15
5, 13
8, 10
2, 16
3, 11
*
** NO_ (or NC_) and COM_ pins are identical and interchangeable. Either may be considered as an input or output; signals pass
equally well in either direction.
All pins have ESD diodes to V- and V+.
A1
A2
A3
A1
(NC)
S
S
P1
N3
D
D
D
N1
V-
GND_
IN_
V+
V+
V+
COM_
NO_
S
D
N2
S
S
P2
D
NORMALLY OPEN SWITCH CONSTRUCTION
COM_ - NO_
IN_
0
1
OFF
ON
BSD DIODES
ON GND_, IN_,
COM_, NO_, AND NC_
Figure 1. T-Switch Construction
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4547EEE+ | 功能描述:視頻開關(guān) IC Bidirectional RF Video Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4547EEE+T | 功能描述:視頻開關(guān) IC Bidirectional RF Video Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4547EEE-T | 功能描述:RF 開關(guān) IC RoHS:否 制造商:M/A-COM Technology Solutions 開關(guān)數(shù)量:Single 開關(guān)配置:SPDT 介入損耗:0.6 dB 截止隔離（典型值）:43 dB 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN-16 封裝:Reel |
| MAX4547EPE | 功能描述:RF 開關(guān) IC RoHS:否 制造商:M/A-COM Technology Solutions 開關(guān)數(shù)量:Single 開關(guān)配置:SPDT 介入損耗:0.6 dB 截止隔離（典型值）:43 dB 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN-16 封裝:Reel |
| MAX4547ESE | 功能描述:RF 開關(guān) IC RoHS:否 制造商:M/A-COM Technology Solutions 開關(guān)數(shù)量:Single 開關(guān)配置:SPDT 介入損耗:0.6 dB 截止隔離（典型值）:43 dB 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN-16 封裝:Reel |
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