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3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
Table 2 . Operating Mode for MIMO Slave Configuration (Note 12)
MODE CONTROL LOGIC INPUTS
CIRCUIT BLOCK STATES
CALI-
MODE
SPI REG 16,
D1:D0 (Note 4)
ENABLE
PIN
RXTX PIN
Rx PATH
Tx PATH
PLL, VCO
CLOCK
OUT
BRATION
SECTIONS
ON
SHUTDOWN
STANDBY (Note 7)
CLOCK OUT
Rx
Tx
Tx CALIBRATION
(Note 9)
Rx CALIBRATION
(Note 10)
xx
01
00 (Note 11)
01
01
11
11
0
0
0
1
1
1
1
0
1
1
1
0
0
1
Off
Off
Off
On
Off
Off
On
(except
LNA)
Off
Off
Off
Off (Note 8)
On
On
(except PA
driver)
On
(except PA
driver)
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
None
None
None
None
None
AM detector
+ RX I,Q
buffers
Loop-back
Note 12: Set SPI Reg 16 D4:3 = “00,” Reg 24 D8 = “0,” Reg 24 D1:0 = “10” to select the MIMO slave configuration.
Detailed Description
Configurations
The MAX2838 can be configured in a) single mode, for
non-MIMO or SISO applications, b) MIMO master
mode, and c) MIMO slave mode. Options b) and c) are
for MIMO applications where a coherent LO is required
for all transmitters and all receivers.
Modes of Operation
The modes of operation for the MAX2838 are clock-out,
shutdown, standby, Tx, Rx, Tx calibration, and Rx cali-
bration. See Table 1 for a summary of the modes of
operation. The logic input pins —RXTX (pin 47) and
ENABLE (pin 48)—control the various modes.
Shutdown Mode (Complete IC Power-Down)
All circuit blocks are powered down, except the 4-wire
serial bus and its internal programmable registers.
Current drain is the minimum possible with the supply
voltages applied. If the digital supply voltage is applied
at the VCCDIG pin, the registers can be loaded.
Standby Mode
PLL, VCO, and LO generation blocks are ON, so that
Tx or Rx modes can be quickly enabled from this
mode. These and other blocks may be selectively
enabled in this mode.
Rx Mode
All Rx circuit blocks are powered on and active.
Antenna signal is applied; RF is downconverted, fil-
tered, and buffered at Rx BB I & Q outputs.
Tx Mode
All Tx circuit blocks are powered on. The external PA is
powered on after a programmable delay.
Clock-Out Only
Only the clock-out signal is active on the CLKOUT pin.
The clock output divider is also functional. The rest of
the transceiver is powered down.
Rx Calibration
Part of the Rx and Tx circuit blocks except the LNA and
PA driver are powered on and active. The transmitter
IQ input signal is upconverted to RF and at the output
of the Tx gain control (VGA). It is fed to the receiver at
the input of the downconverter. Either or both of the two
receiver channels can be connected to the transmitter
and powered on. The I/Q lowpass filters are not present
in the transmitter signal path (they are bypassed).
Tx Calibration
All Tx circuit blocks except the PA driver and external
PA are powered on and active. The AM detector and
receiver I/Q channel buffers are also on, along with
multiplexers in receiver side to route this AM detector’s
signal to each I and Q differential lines.
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相关代理商/技术参数
MAX2838-RD0142 制造商:Maxim Integrated Products 功能描述:- Boxed Product (Development Kits)
MAX2839ASEVKIT+ 功能描述:WiFi/802.11开发工具 MAX2839AS Eval Kit RoHS:否 制造商:Roving Networks 产品:Evaluation Boards 工具用于评估:RN-171 支持协议:802.11 b/g 频率:2.4 GHz 接口类型:UART 工作电源电压:2 V to 16 V
MAX2839ASEWO+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX2839ASEWO+T 功能描述:射频收发器 MAX2557A Eval Kit RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
MAX2839ETN+ 功能描述:射频收发器 2.3-2.7GHz Wireless Broadband RF Txr RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
MAX2839ETN+D 功能描述:射频收发器 RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
MAX2839ETN+T 功能描述:射频收发器 2.3-2.7GHz Wireless Broadband RF Txr RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
MAX2839ETN+TD 功能描述:射频收发器 RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray