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參數資料
| 型號： | MAX19794ETX+ |
| 廠商： | Maxim Integrated |
| 文件頁數： | 17/25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 |
17
MAX19794
10MHz to 500MHz Dual Analog Voltage Variable
Attenuator with On-Chip 10-Bit SPI-Controlled DAC
Pin Description (continued)
PIN
NAME
DESCRIPTION
13
V
CC
Analog Supply Voltage. Bypass to GND with capacitor as close as possible to the device. See
the Typical Application Circuit.
14
REF_IN
DAC Reference Voltage Input (Optional)
15
REF_SEL
DAC Reference Voltage Selection Logic Input
Logic = 0 enable on-chip DAC reference.
Logic = 1 use off-chip DAC reference (pin 14).
16
DAC_LOGIC DAC Logic Control Input. See Table 1.
17
COMP_OUT
Comparator Logic OutputA 4.7pF capacitor could be used to reduce any potential rise time
glitching when the comparator changes state.
18
MODE
Attenuator Control Mode Logic Input
Logic = 1 enable attenuator step control.
Logic = 0 enable attenuator SPI control.
19
DWN
Down Pulse Input
Logic pulse = 0 for each step-down.
20
UP
Up Pulse Input
Logic pulse = 0 for each step-up.
19, 20
DWN/UP
Logic = 0 to both pins to reset the attenuator to a minimum attenuation state
21
CLK
SPI Clock Input
22
DIN
SPI Data Input
23
DOUT
SPI Data Output
24
CS
SPI Chip Selection Input
25
V
CC
Digital Supply Voltage. Bypass to GND with capacitor as close as possible to the device as
possible. See the Typical Application Circuit.
29
OUT_B
Attenuator B RF Output. Internally matched to 50I over the operating frequency band. This pin,
if used, requires a DC block. If this attenuator is not used, the pin can be left unconnected.
32
V
CC
Attenuator B Power Supply. Bypass to GND with capacitor and resistor as shown in the Typical
Application Circuit.
35
IN_B
Attenuator B RF Input. Internally matched to 50I over the operating frequency band. This pin,
if used, requires a DC block. If this attenuator is not used, the pin can be left unconnected.
EP
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses
multiple ground vias to provide heat transfer out of the device into the PCB ground planes.
These multiple via grounds are also required to achieve the noted RF performance. See the
Layout Considerations section.
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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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