MAX2831_11 Datasheet, PDF (3/34 Pages) Maxim Integrated Products – 2.4GHz to 2.5GHz 802.11g/b RF Transceivers with Integrated PA

2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2831 EV kit: V_{CC_} = 2.7V to 3.6V, V_CCPA = V_CCTXPA = 2.7V to 4.2V, T_A = -40°C to +85°C, 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 50Ω, receiver baseband outputs are open. 100mV_RMS differential I and Q signals (54Mbps IEEE 802.11g OFDM) applied to I/Q
baseband inputs of transmitter in transmit mode, f_REF = 40MHz, and registers set to recommended settings and corresponding test
mode, unless otherwise noted. Typical values are at V_CC = 2.8V, V_CCPA = 3.3V, and T_A = +25°C, LO frequency = 2.437GHz, 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)
PARAMETERS
CONDITIONS
LOGIC INPUTS: SHDN, RXTX, SCLK, DIN, CS, B7:B1, RXHP
MIN TYP MAX UNITS
Digital Input-Voltage High, V_IH
V_CC -
V
0.4
Digital Input-Voltage Low, V_IL
Digital Input-Current High, I_IH
Digital Input-Current Low, I_IL
LOGIC OUTPUTS: LD, CLOCKOUT
0.4
V
-1
+1
µA
-1
+1
µA
Digital Output-Voltage High, V_OH Sourcing 100µA
V_CC -
0.4
V
Digital Output-Voltage Low, V_OL Sinking 100µA
0.4
V
AC ELECTRICAL CHARACTERISTICS—Rx Mode
(MAX2831 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 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
RECEIVER SECTION: LNA RF INPUT-TO-BASEBAND I/Q OUTPUTS
RF Input Frequency Range
High RF gain
RF Input Return Loss
Mid RF gain
Low RF gain
Total Voltage Gain
Maximum gain, B7:B1 =
1111111
Minimum gain, B7:B1 =
0000000
T_A = +25°C
T_A = -40°C to +85°C
T_A = +25°C
MIN TYP MAX UNITS
2.4
2.5
GHz
18
11
dB
14
86
98
83
dB
3
8
RF Gain Steps (Note 3)
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10)
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X)
-16
dB
-33
Gain change from high gain to medium gain, high gain to
RF Gain-Change Settling Time low, or medium gain to low gain; gain settling to within
0.2
µs
±2dB of steady state; RXHP = 1
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