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參數(shù)資料
| 型號： | MAX4939CTN+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/19頁 |
| 文件大小： | 0K |
| 描述： | IC TRANSMIT/RCVR SWITCH 56-TQFN |
| 應(yīng)用說明： | Ultrasound Imaging Systems Application Note |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 功能： | 開關(guān) |
| 電壓電源： | 單/雙電源 |
| 電壓 - 電源，單路/雙路(±)： | 1.62 V ~ 5.5 V，±1.35 V ~ 2.75 V |
| 電流 - 電源： | 1.5mA |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 56-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 56-TQFN-EP（5x11） |
| 包裝： | 帶卷 (TR) |
______________________________________________________________________________________ 13
MAX4936–MAX4939
Octal High-Voltage Transmit/Receive Switches
Figure 2. SPI Logic
Detailed Description
The MAX4936–MAX4939 are octal, high-voltage trans-
mit/receive (T/R) switches. The T/R switches are based
on a diode bridge topology, and the amount of current
in the diode bridges can be programmed through an
SPI interface. All devices feature a latch-clear input to
asynchronously turn off all T/R switches and put the
device into a low-power shutdown mode. The MAX4936/
MAX4938 include the T/R switch and grass-clipping
diodes, performing both transmit and receive operations.
The MAX4937/MAX4939 include just the T/R switch and
perform the receive operation only.
The MAX4936/MAX4938 transmit path is low impedance
during high-voltage transmit and high impedance during
low-voltage receive, providing isolation between transmit
and receive circuitry. The high-voltage transmit path is
high bandwidth, low distortion, and low jitter.
The receive path for all devices is low impedance dur-
ing low-voltage receive and high impedance during
high-voltage transmit, providing protection to the receive
circuitry. The low-voltage receive path is high bandwidth,
low noise, low distortion, and low jitter. Each T/R switch
can be individually programmed on or off, allowing these
devices to also be used as receive path multiplexers.
The MAX4936/MAX4937 feature clamping diodes to
protect the receiver input from voltage spikes due to
leakage currents flowing through the T/R switches dur-
ing transmission. The MAX4938/MAX4939 do not have
clamping diodes and rely on clamping diodes integrated
in the receiver front-end.
Serial Interface
All the devices are controlled by a serial interface with a
12-bit serial shift register and transparent latch (Figure 2).
Each of the first 4 data bits controls the bias current into
the diode bridges (see Figure 3 and Table 2), while the
remaining 8 data bits control a T/R switch (Table 1). Data
on DIN is clocked with the most significant bit (MSB) first
into the shift register on the rising edge of CLK. Data is
clocked out of the shift register onto DOUT on the rising
edge of CLK. DOUT reflects the status of DIN, delayed
by 12 clock cycles (Figure 4).
Transmit/Receive Switch
The T/R switch is based on a diode bridge topology. The
amount of bias current into each diode bridge is adjust-
able by setting the S0–S3 switches through the serial
interface (see Figure 3 and Table 2).
Latch Enable (LE)
Drive LE logic-low to change the contents of the latch
and update the state of the T/R switches (Figure 4).
Drive LE logic-high to hold the contents of the latch and
prevent changes to the switches’ states. To reduce noise
due to clock feedthrough, drive LE logic-high while data
is clocked into the shift register. After the data shift reg-
ister is loaded with valid data, pulse LE logic-low to load
the contents of the shift register into the latch.
Functional Diagram
D0
D1
D10
D11
REGISTER
DIN
ON1
ON2
S2
S3
CLK
CLR
DOUT
LE
LATCH
SPI LOGIC
*LOW-VOLTAGE ISOLATION DIODES AVAILABLE ON MAX4936/MAX4938 ONLY.
**OUTPUT CLAMP DIODES AVAILABLE ON MAX4936/MAX4937 ONLY.
MAX4936MAX4939
SPI LOGIC
VDD
GND
VEE
CLK DIN DOUT LE CLR
VCC
VEE
LVCC_
HV_
COM_
LVEE_
NO_
**
*
(SINGLE CHANNEL)
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參數(shù)描述 |
|---|---|
| MAX4940ACTN+ | 功能描述:功率驅(qū)動器IC Unipolar/Bipolar Digital Pulser RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4940ACTN+T | 功能描述:功率驅(qū)動器IC Unipolar/Bipolar Digital Pulser RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4940BETN+ | 功能描述:功率驅(qū)動器IC Unipolar/Bipolar Digital Pulser RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4940BETN+T | 功能描述:功率驅(qū)動器IC Unipolar/Bipolar Digital Pulser RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4940CTN+ | 功能描述:功率驅(qū)動器IC Unipolar/Bipolar Digital Pulser RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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