MAX2839ETN+ Maxim Integrated Products, MAX2839ETN+ Datasheet - Page 21

• Manufacturer Part Number: MAX2839ETN+
• Description: RF Transceiver 2.3Ghz To 2.7Ghz MIM O Wireless Broadband
• Manufacturer: Maxim Integrated Products

Specifications of MAX2839ETN+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Part of Rx and Tx circuit blocks except LNA and PA dri-
ver are powered on and active. The transmitter I/Q
input signals are upconverted to RF, and the output of
the Tx gain control block (VGA) is fed to the receiver at
the input of the downconverter. Either receiver A or
both receivers 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).
The MAX2839 includes 32 programmable 16-bit regis-
ters. The most significant bit (MSB) is the read/write
selection bit. The next 5 bits are register address. The
Figure 1. 4-Wire SPI Serial-Interface Timing Diagram
MICROWIRE is a trademark of National Semiconductor Corp.
DOUT
DOUT
SCLK
SCLK
DIN
DIN
CS
CS
2.3GHz to 2.7GHz MIMO Wireless Broadband
Receiver (Rx) Calibration or Loopback
t
CSO
______________________________________________________________________________________
t
CSS
Programmable Registers
and 4-Wire SPI Interface
BIT 1
BIT 1
t
DS
BIT 2
BIT 2
DON'T CARE
t
DH
SPI REGISTER WRITE
SPI REGISTER READ
BIT 5
BIT 5
DON'T CARE
10 least significant bits (LSBs) are register data.
Register data is loaded through the 4-wire
SPI/MICROWIRE™-compatible serial interface. Data at
DIN is shifted in MSB first and is framed by CS. When
CS is low, the clock is active, and input data is shifted
at the rising edge of the clock. During the read mode,
register data selected by address bits is shifted out to
DOUT at the falling edges of the clock. At the CS rising
edge, the 10-bit data bits are latched into the register
selected by address bits. See Figure 1. The register
values are preserved in shutdown mode as long as the
power-supply voltage is maintained. However, every
time the power-supply voltage is turned on, the regis-
ters are reset to the default values.
BIT 6
t
t
CL
D
BIT 6
t
CH
RF Transceiver
BIT 13
DON'T CARE
BIT 14
BIT 13
t
CSH
t
CSW
BIT 14
t
CS1
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