- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385769 > RF2713 (RF MICRO DEVICES INC) 887667300 PDF資料下載
參數(shù)資料
| 型號(hào)： | RF2713 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | 887667300 |
| 中文描述： | 0.1 MHz - 265 MHz RF/MICROWAVE QUADRAPHASE MODEM |
| 封裝： | ROHS COMPLIANT, SOIC-14 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 135K |
| 代理商： | RF2713 |
Preliminary
7-20
RF2713
Rev A2 010129
5
M
U
Pin
1
Function
I INPUT A
Description (Demodulator Configuration)
When the RF2713 is configured as a Quadrature Demodulator, both
mixers are driven by the IF. Whether driving the mixers single-endedly
(as shown in the application schematic) or differentially, the A Inputs
(pins 1 and 3) should be connected to each other. Likewise, both B
Inputs (pins 2 and 4) should be connected to each other. This ensures
that the IF will reach each mixer with the same amplitude and phase,
yielding the best I and Q output amplitude and quadrature balance.
Note that connecting the inputs in parallel changes the input imped-
ance (see the Gilbert Cell mixer equivalent circuit). The single-ended
input impedance (as shown in the application circuit) becomes 630
,
but in the balanced configuration, the input impedance would remain
1260
.
Interface Schematic
The mixers are Gilbert Cell designs with balanced inputs. The equiva-
lent schematic for one of the mixers is shown on the following page.
The input impedance of each pin is determined by the 1260
resistor
to V
CC
in parallel with a transistor base. Note from the schematic that
all four input pins have an internally set DC bias. For this reason, all
four inputs (pins 1 through 4) should be DC blocked. The capacitance
values of the blocking capacitors is determined by the IF frequency.
When driving single-endedly, both the series (pins 1 and 3) and shunt
(pins 2 and 4) blocking capacitors should be low impedances, relative
to the 630
input impedance.
Same as pin 1, except complementary input.
2
3
4
5
I INPUT B
Q INPUT A
Q INPUT B
BG OUT
See pin 1.
Same as pin 1, except Q Buffer Amplifier.
See pin 1.
Same as pin 3, except complementary input.
See pin 1.
Band Gap voltage reference output. This voltage output is held con-
stant over variations in supply voltage and operating temperature and
may be used as a reference for other external circuitry. This pin should
not be loaded such that the sourced current exceeds 1mA. This pin
should be bypassed with a large (0.1
μ
F) capacitor.
This pin is not used in the Demodulator Configuration, but must be con-
nected to V
CC
in order to properly bias the I mixer.
6
I IF OUT
7
8
Q IF OUT
Q OUT
Same as pin 6, except Q mixer.
Same as pin 6.
Q Mixer’s Baseband Output. This pin is NOT internally DC blocked and
has DC present due to internal biasing. This is an emitter-follower type
output with an internal 2k
pull-down resistor. Even though the AC out-
put impedance is ~50
, this pin is intended to drive only high imped-
ance loads such as an opamp or an ADC. The output transistor is NOT
biased such that it can drive a large signal into a 50
load. DC cou-
pling of this output is permitted provided that the DC impedance to
ground, which appears in parallel with the internal pull-down resistor, is
significantly greater than 2k
.
Same as pin 8, except Q Mixer’s Baseband Output.
9
10
I OUT
GND
Same as pin 8.
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
Same as pin 10.
11
12
GND
GND
Same as pin 10.
1260
1260
INPUT A
V
CC
V
CC
INPUT B
IF OUT
I/Q OUT
2 k
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RF2721 | QUADRATURE DEMODULATOR |
| RF2909 | 3V 915MHZ SPREAD-SPECTRUM TRANSMITTER IC |
| RF2915 | 433/868/915MHZ FSK/ASK/OOK TRANSCEIVER |
| RF2917 | 433/868/915MHZ FM/FSK RECEIVER |
| RF2919 | 433/868/915MHZ ASK/OOK RECEIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RF2713_06 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:QUADRATURE MODULATOR/DEMODULATOR |
| RF2713_1 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:QUADRATURE MODULATOR/DEMODULATOR |
| RF2713-000 | 制造商:TE Connectivity 功能描述:TOOLING,RESETTABLE FUSE - Bag |
| RF2713PCBA-D | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:QUADRATURE MODULATOR/DEMODULATOR |
| RF2713PCBA-M | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:QUADRATURE MODULATOR/DEMODULATOR |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。