2.4GHz to 2.5GHz 802.11g/b

RF Transceivers with Integrated PA

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7

AC ELECTRICAL CHARACTERISTICS—Tx Mode (continued)

RXTX = CS = high, and SCLK = DIN = low, with power matching for the differential RF pins using the typical applications circuit.

band I/Q inputs of transmitter (differential DC-coupled). Registers set to recommend settings and corresponding test mode, unless

otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,

and SMA connectors.) (Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

MAX2831

-20

RF Output Return Loss

Off-chip balun + match, single-

ended

MAX2832

-10

dB

Minimum differential resistance

20

k

Ω

Tx I/Q Input Load Impedance

(R || C)

Maximum differential capacitance

0.7

pF

Baseband -3dB Corner

Frequency

D1:D0 = 01, Register 8

(A3:A0 = 1000)

Nominal mode

11

MHz

Baseband Filter Rejection

At 30MHz, in nominal mode

62

dB

Minimum Power Detector Output

Voltage

Short sequence transmitter power = +9dBm

0.3

V

Maximum Power Detector Output

Voltage

Short sequence transmitter power = +19dBm

1.2

V

RF Power Detector Response Time

0.3

µs

TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (see the Tx/Rx

Calibration Mode section)

Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS

(for LO leakage = -29dBc),

-34

LO Leakage and Sideband

Detector Output

Calibration register,

D12:D11 = 00,

A3:A0 = 0110

(for LO leakage = -240dBc),

-44

Amplifier Gain Range

D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110

30

dB

Lower -3dB Corner Frequency

1

MHz