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參數資料
| 型號： | MAX19794ETX+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 23/25頁 |
| 文件大小： | 5676K |
| 描述： | ATTENUATR 46DB 50OHM 4GHZ 36TQFN |
| 標準包裝： | 50 |
| 衰減值： | 0dB ~ 46.4dB |
| 頻率范圍： | 500MHz ~ 4GHz |
| 阻抗： | 50 歐姆 |
| 封裝/外殼： | 36-WFQFN 裸露焊盤 |
23
MAX19794
10MHz to 500MHz Dual Analog Voltage Variable
Attenuator with On-Chip 10-Bit SPI-Controlled DAC
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for high
frequency circuit stability. Bypass each V
CC
pin with
capacitors placed as close as possible to the device.
Place the smallest capacitor closest to the device. See
the Typical Application Circuit and Table 7 for details.
Exposed Pad RF and Thermal
Considerations
The exposed pad (EP) of the devices 36-pin TQFN
package provides a low thermal-resistance path to the die.
It is important that the PCB on which the device is mounted
to conduct heat from this contact. In addition, provide the
EP with a low-inductance RF ground path for the device.
The EP must be soldered to a ground plane on the PCB,
either directly or through an array of plated via holes.
Soldering the pad to ground is also critical for efficient
heat transfer. Use a solid ground plane wherever possible.
Typical Application Circuit
MAX19794
EP
C1
RFIN_A
V
CC
IN_B
GND
2
3
4
5
6
7
S1
S2
S3
S4
8
9
10
11
12
13
14
DAC
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
ATTEN_B
ATTEN_A
30
31
32
33
34
35
36
OUT_B
1
ATTENUATION-
CONTROL
CIRCUITRY
R1
C5
CTRL
GND
C12
C7
C13
C8
V
CTRL
REF_IN
R3
GND
GND
GND
GND
NOTE: FOR ATTENUATOR A ONLY CONFIGURATION, REMOVE C3 AND MOVE C2 DIAGONALLY TO CONNECT PIN 2 TO THE OUTPUT CONNECTION RF_AB.
FOR ATTENUATOR B ONLY CONFIGURATION, REMOVE C2.
FOR CASCADED CONFIGURATION, REMOVE C3 AND USE C2 TO CONNECT OUT_A TO IN_B.
GND
RTNB
REF_IN
REF_SEL
REF_SEL
DAC_LOGIC
DAC_LOGIC
MODE
MODE
COMP_OUT
COMP_OUT
V
CC
R2
C4
C3
C6
C9
C2
RFOUT_B
RF_AB
V
CC
V
CC
CS
V
CC
V
CC
DOUT
DIN
CLK
UP
DWN
C11
C10
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX19794ETX+ | 功能描述:衰減器 -IC 10MHz to 500MHz Attenuator RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| MAX19794ETX+T | 功能描述:衰減器 -IC 10MHz to 500MHz Attenuator RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰減:18 dB 容差: 阻抗: 功率額定值:30 dBm 安裝風格:SMD/SMT 工作溫度范圍:- 40 C to + 85 C |
| MAX1979ETM | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1979ETM+ | 功能描述:電壓模式 PWM 控制器 Integrated Temp Ctlr for Peltier Modules RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1979ETM+T | 功能描述:電壓模式 PWM 控制器 Integrated Temp Ctlr for Peltier Modules RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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