参数资料
型号: MAX2015ETA+T
厂商: Maxim Integrated
文件页数: 9/13页
文件大小: 0K
描述: IC DETECT/CNTRL LOG 8-TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
频率: 100MHz ~ 3GHz
RF 型: 手机,GSM,EDGE,CDMA
输入范围: -55dBm ~ 5dBm
电源电压: 2.7 V ~ 5.25 V
电流 - 电源: 20.5mA
包装: 带卷 (TR)
封装/外壳: 8-WDFN 裸露焊盘
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
POWER AMPLIFIER
V S
R4
TRANSMITTER
C6
C5
1
V CC
GAIN-CONTROL INPUT
COUPLER
RFIN
C1
2
DETECTORS
INHI
20k ?
OUT 8
SET 7
V OUT
V SET
SET-POINT
OUT
SET
LOGARITHMIC
DETECTOR
IN
C2
3
INLO
20k ?
GND
6
DAC
20k ?
C4
C3
4
V CC
MAX2015
PWDN
5
20k ?
MAX2015
Figure 2. Controller-Mode Typical Application Circuit
detected signal with a reference voltage determined by
V SET . The integrator, acting like a comparator, increas-
es or decreases the voltage at OUT, according to how
closely the detected signal level matches the V SET ref-
erence. The MAX2015 adjusts the power of the PA to a
level determined by the voltage applied to SET. With R1 =
0 ? , the controller mode slope is approximately
19mV/dB (RF = 100MHz).
Figure 3. System Diagram for Automatic Gain-Control Loop
Layout Considerations
As with any RF circuit, the layout of the MAX2015 circuit
affects the device’s performance. Use an abundant num-
ber of ground vias to minimize RF coupling. Place the
input capacitors (C1, C2) and the bypass capacitors
(C3–C6) as close to the IC as possible. Connect the
bypass capacitors to the ground plane with multiple vias.
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9
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