Datasheet

AC ELECTRICAL CHARACTERISTICS—Rx Mode (continued)
(MAX2830 EV kit, V
CC_
= 2.8V, V
CCPA
= V
CCTXPA
= 3.3V, T
A
=+25°C, f
RF
= 2.439GHz, f
LO
= 2.437GHz; receiver baseband I/Q out-
puts at 112 mV
RMS
(-19dBV), f
REF
= 40MHz, SHDN = CS = high, RXTX = SCLK = DIN = low, with power matching for the differential
RF pins using the typical applications and registers set to default settings and corresponding test mode, unless otherwise noted.
Unmodulated single-tone RF input signal is used with specifications that normally apply over the entire operating conditions, unless
otherwise indicated. 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
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10)
-17
RF Gain Steps (Note 3)
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X)
-33.5
dB
RF Gain-Change Settling Time
Gain change from high gain to medium gain, high gain to
low, or medium gain to low gain; gain settling to within
±2dB of steady state; RXHP = 1
0.2 µs
Baseband Gain Range
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
54 62 68 dB
Voltage gain = maximum with B7:B6 = 11 3.3
Voltage gain = 50dB with B7:B6 = 11 3.8
Voltage gain = 45dB with B7:B6 = 10 16.7
DSB Noise Figure (ANT1)
Voltage gain = 15dB with B7:B6 = 0X 34.7
dB
Voltage gain = maximum with B7:B6 = 11 4.0
Voltage gain = 50dB with B7:B6 = 11 4.5
Voltage gain = 45dB with B7:B6 = 10 17.4
DSB Noise Figure (ANT2)
Voltage gain = 15dB with B7:B6 = 0X 35.3
dB
B7:B6 = 11 -41
B7:B6 = 10 -24
In-Band Compression Point
Based on EVM
-19dBV
RMS
baseband
output EVM degrades to
9%
B7:B6 = 0X -6
dBm
In-Band Output P-1dB Voltage gain = 90dB, with B7:B6 = 11 2.5 V
P-P
B7:B6 = 11 -12
B7:B6 = 10 -4
Out-of-Band Input IP3 (Note 4)
B7:B6 = 0X 24
dBm
I/Q Phase Error 1 σ variation (without calibration) ±0.35 D eg r ees
I/Q Gain Imbalance 1 σ variation (without calibration) ±0.1 dB
Minimum differential resistance 10 kΩ
RX I/Q Output Load Impedance
(R || C)
Maximum differential capacitance 10 pF
Tx-to-Rx Conversion Gain for Rx
I/Q Calibration
For receiver gain, B7:B1 = 1101111 (Note 5) 0.5 dB
Baseband VGA Settling Time
Gain change from B5:B1 = 10111 to B5:B1 = 00111; gain
settling to within ±2dB of steady state
0.1 µs
I/Q Output DC Step when RXHP
Transitions from 1 to 0 in
Presence of 802.11g Short
Sequence
After switching RXHP to logic 0 from initial logic 1, during
ideal short sequence data at -55dBm input in AWGN
channel, for -19dBV output; normalized to RMS signal on
I and Q outputs; transition point varied from 0 to 0.8µs in
steps of 0.1µs
-5 dBc
4
Maxim Integrated
2.4GHz to 2.5GHz 802.11g/b RF Transceiver, PA,
and Rx/Tx/Antenna Diversity Switch
MAX2830