參數(shù)資料
型號(hào)： MAX2820EGM-TD
廠商： Maxim Integrated Products, Inc.
英文描述： 2.4GHz 802.11b Zero-IF Transceivers
中文描述： 基于2.4GHz 802.11b零IF收發(fā)器
文件頁(yè)數(shù)： 19/23頁(yè)
文件大?。?/td> 392K
代理商： MAX2820EGM-TD
M
2.4GHz 802.11b Zero-IF Transceivers
______________________________________________________________________________________
19
Receive Gain Control and DC Offset Nulling
The MAX2820/MAX2821 receive path gain is varied
through an external voltage applied to the pin RX_AGC.
Maximum gain is at V
RX_AGC
= 0V and minimum gain is
at V
RX_AGC
= 2V. The RX_AGC input is a high-imped-
ance analog input designed for direct connection to the
RX_AGC DAC output of the baseband IC. The gain-
control range, which is continuously variable, is typical-
ly 70dB. The gain-control characteristic is shown in the
Typical Operating Characteristics
section graph
Receiver Voltage Gain vs. Gain-Control Voltage.
Some local noise filtering through a simple RC network
at the input is permissible. However, the time constant
of this network should be kept sufficiently low in order
not to limit the desired response time of the RX gain-
control function.
Receiver Baseband Amplifier Outputs
The MAX2820/MAX2821 receiver baseband outputs
(RX_BBIP, RX_BBIN, RX_BBQP, and RX_BBQN) are
differential low-impedance buffer outputs. The outputs
are designed to be directly connected (DC-coupled) to
the in-phase (I) and quadrature-phase (Q) ADC inputs
of the baseband IC. The RX I/Q outputs are internally
biased to +1.2V common-mode voltage. The outputs
are capable of driving loads up to 5k
|| 5pF with the
full bandwidth baseband signals at a differential ampli-
tude of 500mV
P-P
.
Proper board layout is essential to maintain good bal-
ance between I/Q traces. This provides good quadra-
ture phase accuracy.
Receiver Power Detector
The MAX2820/MAX2821 receiver level detector is a
digital output from an internal threshold detector that is
used to determine when to change the LNA gain state.
In most applications, it is connected directly to a com-
parator input of the baseband IC. The threshold level
can be programmed through the MAX2820/MAX2821
control software.
ADDRESS
DATA BIT
D11:D9
D8:D6
CONTENT
2C(2:0)
1C(2:0)
DEFAULT
111
111
DESCRIPTION
VGA DC Offset Nulling Parameter 2
VGA DC Offset Nulling Parameter 1
RX Level Detector Midpoint Select
11 = 01 = 50.2mV
P
10 = 70.9mV
P
00 = 35.5mV
P
Special Function Select (not presently used)
0 = OFF
1 = ON
Receive Filter -3dB Frequency Select (frequencies are
approximate)
000 = 8.5MHz
001 = 8.0MHz
010 = 7.5MHz
011 = 7.0MHz
100 = 6.5MHz
101 = 6.0MHz
D5:D4
DL(1:0)
01
D3
SF(0)
0
0 1 0 0
D2:D0
BW(2:0)
010
Table 7. Receive Settings Register (RECEIVE)
ADDRESS
DATA BIT
D11:D4
CONTENT
X
DEFAULT
X
DESCRIPTION
Reserved
PA Bias Select:
1111 = Highest PA bias
…………
0000 = Lowest PA bias
0 1 0 1
D3:D0
PA(3:0)
0000
Table 8. Transmit Settings Register (TRANSMIT)
相關(guān)PDF資料
PDF描述
MAX2825EVKIT Evaluation Kits for the MAX2825/MAX2826/MAX2827
MAX2826EVKIT Evaluation Kits for the MAX2825/MAX2826/MAX2827
MAX2827EVKIT Evaluation Kits for the MAX2825/MAX2826/MAX2827
MAX2825 POT 50K OHM 12MM VERT NO BUSHING
MAX2826 MAX2825/MAX2826/MAX2827 Evaluation Kits
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX2820ETM 功能描述:射頻接收器 2.4GHz 802.11b Zero-If Transceiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
MAX2820ETM+ 功能描述:射頻接收器 2.4GHz 802.11b Zero-If Transceiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
MAX2820ETM+D 功能描述:射頻接收器 RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
MAX2820ETM+T 功能描述:射頻接收器 2.4GHz 802.11b Zero-If Transceiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
MAX2820ETM+TD 功能描述:射頻接收器 RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*