MAX2831ETMT 查看數據表（PDF） - Maxim Integrated
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MAX2831ETMT Datasheet PDF : 34 Pages
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2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Rx Mode (continued)
(MAX2831 EV kit: VCC_ = 2.8V, VCCPA = VCCTXPA = 3.3V, TA =+25°C, fRF = 2.439GHz, fLO = 2.437GHz; receiver baseband I/Q out-
puts at 112 mVRMS (-19dBV), fREF = 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 which 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
Baseband Gain Range
DSB Noise Figure
In-Band Compression Point
Based on EVM
In-Band Output P-1dB
Out-of-Band Input IP3 (Note 4)
I/Q Phase Error
I/Q Gain Imbalance
RX I/Q Output Load Impedance
(R || C)
Tx-to-Rx Conversion Gain for Rx
I/Q Calibration
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
Voltage gain = maximum with B7:B6 = 11
Voltage gain = 50dB with B7:B6 = 11
Voltage gain = 45dB with B7:B6 = 10
Voltage gain = 15dB with B7:B6 = 0X
-19dBVRMS baseband
output EVM degrades to
9%
B7:B6 = 11
B7:B6 = 10
B7:B6 = 0X
Voltage gain = 90dB, with B7:B6 = 11
B7:B6 = 11
B7:B6 = 10
B7:B6 = 0X
1σ variation (without calibration)
1σ variation (without calibration)
Minimum differential resistance
Maximum differential capacitance
For receiver gain, B7:B1 = 1101111 (Note 5)
55
62
67
dB
2.6
3.2
16
34
-41
-24
-6
2.5
-12
-4
24
±0.35
±0.1
10
10
dB
dBm
VP-P
dBm
D eg r ees
dB
kΩ
pF
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
After switching RXHP to logic 0 from initial logic 1, during
ideal short sequence data at -55dBm input in AWGN
Transitions from 1 to 0 in
Presence of 802.11g Short
Sequence
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
I/Q Output DC Droop
After switching RXHP to 0, D13:D12, Register 7
(A3:A0 = 0111)
I/Q Static DC Offset
RXHP = 1, B7:B1 = 1101110, 1σ variation
Spurious Signal Emissions from
LNA input
RF = 1GHz to 26.5GHz
RECEIVER BASEBAND FILTERS
Gain Ripple in Passband
10kHz to 8.5MHz at baseband
Group-Delay Ripple in Passband 10kHz to 8.5MHz at baseband
±1
±1
-51
±1.3
±45
V/s
mV
dBm
DBP-P
nsP-P
4 _______________________________________________________________________________________
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