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2.3GHz to 2.7GHz Wireless
Broadband RF Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2837 evaluation kit: V CC_ = 2.7V to 3.6V, Rx set to the maximum gain; CS = high, RXHP = SCLK = DIN = low, RSSI and clock output
buffer are off, no signal at RF inputs, all RF inputs and outputs terminated into 50 Ω , receiver baseband outputs are open; 90mV RMS dif-
ferential I and Q signals applied to I, Q baseband inputs of transmitter in transmit mode, f REF = 40MHz, registers set to recommended
settings and corresponding test mode, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V CC = 2.8V, f LO = 2.5GHz,
and T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC OUTPUTS: DOUT
Digital Output-Voltage High, V OH
Digital Output-Voltage Low, V OL
Sourcing 100μA
Sinking 100μA
V CC -
0.4
0.4
V
V
AC ELECTRICAL CHARACTERISTICS—Rx MODE
(MAX2837 evaluation kit: V CC _ = 2.8V, f RF = 2.502GHz, f LO = 2.5GHz; receiver baseband I/Q outputs at 90mV RMS
(-21dBV), f REF = 40MHz, ENABLE = RXENABLE = CS = high, TXENABLE = 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, T A = +25°C, unless otherwise noted.
Lowpass filter is set to 10MHz RF channel BW. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
RF Input Frequency Range
Peak-to-Peak Gain Variation over
RF Input Frequency Range
RF Input Return Loss
Tested at band edges and band center
All LNA gain settings
2.3
0.8
13
2.7
GHz
dB
dB
Total Voltage Gain
T A = -40°C to +85°C
Maximum gain, B7:B1 = 0000000
Minimum gain, B7:B1 = 1111111
90
99
5
13
dB
From max RF gain to max RF gain - 8dB
8
RF Gain Steps
Gain Change Settling Time
From max RF gain to max RF gain - 16dB
From max RF gain to max RF gain - 32dB
Any RF or baseband gain change; gain settling to within
± 1dB of steady state; RXHP = 1
Any RF or baseband gain change; gain settling to within
± 0.1dB of steady state; RXHP = 1
16
32
0.2
2
dB
μs
From maximum baseband gain (B5:B1 = 00000) to
Baseband Gain Range
minimum baseband gain (B5:B1 = 11111),
58
62
66
dB
T A = -40°C to +85°C
Baseband Gain Minimum
Step Size
Voltage gain ≥ 65dB with max RF gain (B7:B6 = 00)
Voltage gain = 50dB with max RF gain - 8dB
(B7:B6 = 01)
2
2.3
5.5
dB
DSB Noise Figure
Voltage gain = 45dB with max RF gain - 16dB
(B7:B6 = 10)
Voltage gain = 15dB with max RF gain - 32dB
(B7:B6 = 11)
17
27
dB
_______________________________________________________________________________________
3
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