收藏本站
2.4GHz to 2.5GHz
Linear Power Amplifier
Pin Description
PIN
A1
A2
A3
A4
B1
B2
B4
C1
C2
C3
C4
NAME
GND
V CC2
GND
V CC1
RF_OUT
PD_OUT
GND
BIAS
SHDN
V CCB
RF_IN
FUNCTION
3 rd Stage Ground. Refer to Application Information section for detailed PC-board layout information.
2 nd Stage Supply Voltage. Bypass to ground using configuration in the typical operating circuit.
3 rd Stage Ground. Refer to Application Information section for detailed PC-board layout information.
1 st Stage Supply Voltage. Bypass to ground using configuration in the typical operating circuit.
RF Output. Requires external matching.
Power Detector Output. This output is a DC voltage indicating the PA output power. Connect a
47k ? resistor to GND.
1 st Stage and Bias Control Circuit Ground
Bias Control. Connect one 8k ? resistor from BIAS to GND and one 8k ? resistor from BIAS to DAC
block to set the idle current.
Shutdown Input. Drive logic low to place the device in shutdown mode. Drive logic high for normal
operation.
Bias Circuit DC Supply Voltage. Bypass to ground using configuration in the typical operating
circuit.
RF Input. Requires external matching.
Detailed Description
The MAX2242 is a linear PA intended for 2.4GHz ISM-
band wireless LAN applications. The PA is fully charac-
terized in the 2.4GHz to 2.5GHz ISM band. The PA
consists of two driver stages and an output stage. The
the DAC voltage, as shown in the Typical Application
Circuit . Resistor values R1 and R2 are determined as
follows:
V MAX = 1.0 + (1.0 ? R1) / R2;
(I CC = 0, V DAC = V MAX ) (1)
MAX2242 also features an integrated power detector
and power shutdown control mode.
Dynamic Power Control
The MAX2242 is designed to provide optimum power-
added efficiency (PAE) in both high and low power
applications. For a +3.3V supply at high output power
level, the output power is typically +22.5dBm with an
I MAX = (1.0 ? 1867) ? (R1 + R2) / (R1 ? R2);
(I CC = I MAX = max value, V DAC = 0)
I DAC = (V DAC - 1.0) / R1
I MID = (1.0 ? 1867) / R2;
(V DAC = 1.0V or floating)
I CC = 1867 ? I BIAS
(2)
(3)
(4)
(5)
idle current of 280mA. At low output-power levels, the
DC current can be reduced by an external DAC to
increase PAE while still maintaining sufficient ACPR
performance. This is achieved by using external resis-
tors connected to the BIAS pin to set the bias currents
of the driver and output stages. The resistors are typi-
cally 8k ? . Typically, a DAC voltage of 1.0V will give a
280mA bias current. Increasing the DAC voltage will
decrease the idle current. Similarly, decreasing the
DAC voltage will increase the idle current.
The BIAS pin is maintained at a constant voltage of
1.0V, allowing the user to set the desired idle current
using only two off-chip 1% resistors: a shunt resistor,
R2, from BIAS to ground; and a series resistor, R1, to
where
V MAX = is the maximum DAC voltage
I MAX = is the maximum idle current
I MID = is the idle current with V DAC = 1.0V or not
connected
V DAC = is the DAC voltage
I DAC = is the DAC current
If no DAC is used and a constant idle current is
desired, use equation 4 to determine the resistor values
for a given total bias current. Only R2 is required.
6
_______________________________________________________________________________________
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MAX2247EBC+T IC AMP POWER 2.4GHZ 12-UCSP
MAX2265EVKIT EVAL KIT
MAX2309EVKIT EVAL KIT
MAX2320EUP+T IC LNA/MIXER SIGE ADJ 20TSSOP-EP
MAX2323ETI+T IC LNA/MIXER SIGE ADJ 28-TQFN
MAX2335ETI+ IC LNA/MIXER CDMA/OFDM 28TQFN-EP
MAX2338ETI+T IC LNA/MIXER CDMA 28-TQFN
MAX2370EVKIT EVAL KIT MAX2370
相关代理商/技术参数
MAX2244 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control
MAX2244EBL 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX2244EBL-T 功能描述:射频放大器 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel
MAX2244EBL-T10 功能描述:射频放大器 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel
MAX2244EVKIT 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit for the MAX2244/MAX2245/MAX2246
MAX2244-MAX2246 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control
MAX2245 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2.5GHz.22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control
MAX2245EBL 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: