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參數(shù)資料
| 型號： | MAX4526 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Phase-Reversal Analog Switches |
| 中文描述： | 反相模擬開關(guān) |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 111K |
| 代理商： | MAX4526 |
Power-S upply Considerations
Overview
The MAX4526/MAX4527 construction is typical of most
CMOS analog switches. It has three supply pins: V+, V-,
and GND. V+ and V- drive the internal CMOS switches
and set the analog-voltage limits on any switch.
Reverse ESD-protection diodes are internally connect-
ed between each analog signal pin, and both V+ and
V-. One of these diodes conducts if any analog signal
exceeds V+ or V-.
Virtually all of the analog leakage current is through the
ESD diodes to V+ or V-. Although the ESD diodes on a
given signal pin are identical and therefore fairly well
balanced, they are reverse biased differently. Each is
biased by either V+ or V- and the analog signal. This
means their leakages vary as the signal varies. The dif-
ference in the two diode leakages from the signal path
to the V+ and V- pins constitutes the analog-signal-path
leakage current. All analog leakage current flows to the
supply terminals, not to the other switch terminal. This
explains how both sides of a given switch can show
leakage currents of either the same or opposite polarity.
There is no connection between the analog-signal paths
and GND. The analog-signal paths consist of an N-
channel and P-channel MOSFET with their sources and
drains paralleled and their gates driven out-of-phase to
V+ and V- by the logic-level translators.
V+ and GND power the internal logic and logic-level
translator and set the input logic threshold. The logic-
level translator converts the logic levels to switched V+
and V- signals to drive the analog switches’ gates. This
drive signal is the only connection between GND and
the analog supplies. V+ and V- have ESD-protection
diodes to GND. The logic-level input has ESD protec-
tion to V+ and to V- but not to GND, so the logic signal
can go below GND (as low as V-) when bipolar sup-
plies are used.
Increasing V- has no effect on the logic-level thresholds,
but it does increase the drive to the internal P-channel
switches, reducing the overall switch on-resistance. V-
also sets the negative limit of the analog-signal voltage.
The logic-level input pin, IN, has ESD-protection diodes
to V+ and V- but not to GND, so it can be safely driven
to V+ and V-. The logic-level threshold, V
IN
, is CMOS/
TTL compatible when V+ is between 4.5V and 36V
(see Typical Operating Characteristics).
Bipolar Supplies
The MAX4526/MAX4527 operate with bipolar supplies
between ±4.5V and ±18V. However, since all factory
characterization is done with ±15V supplies, specifica-
tions at other supplies are not guaranteed. The V+ and
V- supplies need not be symmetrical, but their sum
cannot exceed the absolute maximum rating of 44V
(see Absolute Maximum Ratings).
M
Phase-Reversal Analog S witc hes
_______________________________________________________________________________________
7
A
TIME WAVEFORMS
OUTPUT SPECTRUM
MODULATOR/DEMODULATOR CIRCUIT
LOGIC (CARRIER)
LOGIC
(CARRIER)
INPUT
OUTPUT
IN
B
A
X
Y
GND
V+
V-
V+
V+
FREQUENCY
AMPLITUDE
LOWER
SIDEBAND
UPPER
SIDEBAND
SUPPRESSED CARRIER
B
X
Y
X-Y
(OUTPUT)
MAX4526
MAX4527
Figure 2. Balanced Modulator/Demodulator
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4527CPA | Phase-Reversal Analog Switches |
| MAX4527CSA | Phase-Reversal Analog Switches |
| MAX4526CPA | Phase-Reversal Analog Switches |
| MAX4526CSA | Phase-Reversal Analog Switches |
| MAX4526EPA | Phase-Reversal Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4526C/D | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4526C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX4526CPA | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4526CSA | 功能描述:模擬開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
| MAX4526CSA+ | 功能描述:模擬開關(guān) IC Phase-Reversal Analog Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16 |
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