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參數(shù)資料
| 型號： | RF2670 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 8MHZ DUAL BASEBAND AGC WITH PROGRAMMABLE LOW PASS FILTERING |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 封裝： | SSOP-24 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 204K |
| 代理商： | RF2670 |
10-48
RF2670
Rev A4 010820
10
I
Pin
1
2
3
4
5
Function
IN I-
IN I+
GND2
DCFB I
VCC2
Description
Complementary input for the in-phase IF channel.
Interface Schematic
Input for the in-phase IF channel.
Ground for VCC2.
DC feedback capacitor for in-phase channel.
Power supply for VGA amplifier 3, differential to single-ended converter,
and post filter.
Ground for VCC3.
6
7
8
9
GND3
IF OUT I
VCC3
I DATA
Analog signal IF output for in-phase channel.
Power supply for data amplifier.
Logic-level data output for the in-phase channel. This is a digital output
signal obtained from the output of a Schmitt trigger.
Received signal strength indicator for the in-phase channel.
10
11
RSSI I
PD
Enable pin for the receiver circuits. PD>2.0V powers up all of the func-
tions. PD<1.0V turns off all of the functions.
Ground for VCC1 for both the in-phase and quadrature channels.
12
13
GND1
BW SEL1
Bandwidth select logic input. Pin 13 and pin 14 provide a two bit control
word for the setting of the IF bandwidth. See Table1. Additional filtering
should be used at the amplifiers to precisely control the 3dB bandwidth
of the system. See design information details about differential input fil-
ters.
See pin 13.
14
15
BW SEL2
Q DATA
Logic-level data output for the quadrature channel. This is a digital out-
put signal obtained from the output of a Schmitt trigger.
Received signal strength indicator for the quadrature channel.
16
17
18
19
20
RSSI Q
VREF
IF OUT Q
VGC
VCC1
Gain control reference voltage.
Analog signal IF output for quadrature channel.
Gain control voltage.
Power supply for bias circuits and VGA amplifiers for both the in-phase
and quadrature channels.
DC feedback capacitor for quadrature channel.
21
22
23
24
DCFB Q
GND1
IN Q+
IN Q-
Ground for VCC1 for both the in-phase and quadrature channels.
Plus input for quadrature channel
Minus input for quadrature channel
Table 1: Bandw idth Selec tion Controls
BWSEL1
BWSEL2
IF
-3dB
Frequency
1MHz
2MHz
4MHz
8MHz
0
0
1
1
0
1
0
1
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