MAX2820ETM-T Maxim Integrated Products, MAX2820ETM-T Datasheet - Page 12

• Manufacturer Part Number: MAX2820ETM-T
• Description: RF Transceiver 2.4GHz 802.11b Zero-If Transceiver
• Manufacturer: Maxim Integrated Products

Specifications of MAX2820ETM-T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.4GHz 802.11b Zero-IF Transceivers
12
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PIN
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
VCC_DRVR
VCC_LNA
VCC_TMX
TX_BBQN
GND_DIG
VCC_REF
TX_BBQP
RF_GAIN
VCC_TXF
PA_BIAS
TX_BBIN
TX_BBIP
RX_RFN
RX_RFP
TX_RFN
TX_RFP
TX_GC
NAME
RBIAS
VREF
N.C.
Supply Voltage for LNA. Bypass with a capacitor as close to the pin as possible. Do not share the
bypass capacitor ground vias with other branches.
No Connection. Not internally connected (MAX2820/MAX2820A only).
Voltage Reference Output (MAX2821/MAX2821A only).
LNA Gain Select Logic Input. Logic high for LNA high-gain mode, logic low for LNA low-gain mode.
Receiver LNA Negative Input. On-chip AC-coupling. Requires off-chip impedance match and
connection to 2:1 balun.
Receiver LNA Positive Input. On-chip AC-coupling. Requires off-chip impedance match and
connection to 2:1 balun.
Supply Voltage for Bias Circuitry and Autotuner. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass capacitor ground vias with other branches.
Precision Bias Resistor Pin. Connect a 12kΩ precision resistor (≤2%) to GND.
Transmit Driver Amplifier Positive Output. On-chip pullup choke to V
match and connection to 4:1 balun.
Transmit Driver Amplifier Negative Output. On-chip pullup choke to V
impedance match and connection to 4:1 balun.
Power-Amplifier Bias-Current Control Signal. Analog output. High-impedance, open-drain current
source. Connect directly to bias-current control input on external PA.
Supply Voltage for Transmit Driver. Bypass with a capacitor as close to the pin as possible. Do not
share the bypass capacitor ground vias with other branches.
Transmit Gain-Control Input. Analog high-impedance input. Connect directly to baseband IC DAC
output. See the Typical Operating Characteristics for Transmitter Gain vs. Gain-Control Voltage.
Supply Voltage for Transmit Mixer and VGA. Bypass with a capacitor as close to the pin as possible.
Do not share the bypass capacitor ground vias with other branches.
Transmit Negative In-Phase Baseband Input. Analog high-impedance differential input. Connect
directly to baseband IC DAC voltage output. Requires a 1.2V common-mode voltage.
Transmit Positive In-Phase Baseband Input. Analog high-impedance differential input. Connect
directly to baseband IC DAC voltage output. Requires a 1.2V common-mode voltage.
Transmit Positive Quadrature Baseband Input. Analog high-impedance differential input. Connect
directly to baseband IC DAC voltage output. Requires a 1.2V common-mode voltage.
Transmit Negative Quadrature Baseband Input. Analog high-impedance differential input. Connect
directly to baseband IC DAC voltage output. Requires a 1.2V common-mode voltage.
Supply Voltage for Transmit Baseband Filter. Bypass with a capacitor as close to the pin as possible.
Do not share the bypass capacitor ground vias with other branches.
Digital Ground
DESCRIPTION
CC
CC
. Requires off-chip impedance
. Requires off-chip
Pin Description