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參數(shù)資料
| 型號： | RF142 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Heterojunction Bipolar Transistor Power Amplifier Dual-Band Controller for GSM and PCS Applications |
| 中文描述： | 異質(zhì)結(jié)雙極晶體管功放雙頻控制器，用于GSM和PCS應用 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 456K |
| 代理商： | RF142 |
Data Sheet
Conexant
Doc. No. 100774B
September 7, 2000
Proprietary Information and Specifications are Subject to Change
RF142
Heterojunction Bipolar Transistor Power Amplifier Dual-Band Controller
for GSM and PCS Applications
The RF142 Power Amplifier (PA) controller is a highly integrated, monolithic device
optimized for use in 900 MHz, 1800 MHz, and 1900 MHz Global System For
Mobile communications
(GSM
) and other Time Division Multiple Access (TDMA)
applications. The control current output from the RF142 can be used to control the
transmit power of a dual or multi-band Heterojunction Bipolar Transistor (HBT) PA.
The device consists of two sections: an RF detector, and a gain controller. The
RF142, when combined with a PA and a coupler, forms a closed PA control loop,
where the PA output power is controlled by a single analog reference voltage,
typically supplied by the baseband.
The RF142 device package and pin configuration are shown in Figure 1. The signal
pin assignments and functional pin descriptions are specified in Table 1. An RF142
block diagram is shown in Figure 2.
Features
RF PA controller for use with HBT PAs
50 dB detector dynamic range
Broadband, logarithmic power detector (800 MHz
to 2000 MHz)
Logarithmic RF power detector requires no
external diodes
Integrator and gain shaping block enhance loop
stability and linearity
Three-cell battery operation (2.7 V to 5.0 V)
Standby mode with 20
μ
A of current consumption
20-pin Thin Shrink Small Outline Package
(TSSOP)
Applications
Transmit power control for dual or multi-band
GSM digital cellular handsets
100774A-1_090700
GND1
VREF
VMP
VAPC+
VAPC-
ENABLE
RFPC+
RFPC-
GND2
VCC1
1
2
3
4
5
6
7
8
9
10
VPCGSM
VPCDCS
VCC2
BAND
AUX-
AUX+
CAP-
CAP+
NC
NC
18
17
16
15
14
13
12
11
19
20
Figure 1. RF142 Pin Configuration – 20-Pin TSSOP
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