MAX2410E 查看數據表（PDF） - Maxim Integrated

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MAX2410E

Low-Cost RF Up/Downconverter with LNA and PA Driver

Maxim Integrated 

Low-Cost RF Up/Downconverter

with LNA and PA Driver

PA Driver

The PA driver typically has 15dB of gain, which is

adjustable over a 35dB range via the GC pin. At full

gain, the PA driver has a noise figure of 3.5dB at

1.9GHz.

For input and output matching information, refer to the

Typical Operating Characteristics for plots of PA Driver

Input and Output Impedance vs. Frequency.

Receive Mixer

The receive mixer is a wideband, double-balanced

design with excellent noise figure and linearity. The

inputs to the mixer are the RF signal at the RXMXIN pin

and the LO inputs at LO and LO. The downconverted

output signal appears at the IFOUT port. The conver-

sion gain of the receive mixer is typically 8.3dB with a

noise figure of 9.8dB.

RF Input

The RXMXIN input is typically connected to the LNA

output through an off-chip filter. This input is externally

matched to 50Ω. See the Typical Operating Circuit

for an example matching network and the RXMXIN

Impedance vs. Frequency graph in the Typical Operating

Characteristics.

Local-Oscillator Inputs

The LO and LO pins are internally terminated with 50Ω

on-chip resistors. AC couple the LO signal to these

pins. If a single-ended LO source is used, connect LO

directly to ground.

IF Output Port

The MAX2410’s receive mixer output appears at the

IFOUT pin, an open-collector output that requires an

external pull-up inductor to VCC. This inductor can be

part of a matching network to the desired IF imped-

ance. Alternatively, a resistor can be placed in parallel

with the pull-up inductor to set a terminating impedance.

The MAX2411A, a similar part to the MAX2410, has the

same functionality as the MAX2410 but offers a differ-

ential, bidirectional (transmit and receive) IF port. This

allows sharing of TX and RX IF filters, which for some

applications provides a lower cost, smaller solution.

Transmit Mixer

The transmit mixer takes an IF signal at the IFIN pin and

upconverts it to an RF frequency at the TXMXOUT pin.

The conversion gain is typically 10dB and the output

1dB compression point is typically -11.4dBm at

1.9GHz.

RF Output

The transmit mixer output appears on the TXMXOUT

pin. It is an open-collector output that requires an exter-

nal pull-up inductor to VCC for DC biasing, which can

be part of an impedance-matching network. Consult

the Typical Operating Characteristics for a plot of

TXMXOUT Impedance vs Frequency.

IF Input

The IFIN pin is a self-biasing input that must be AC-

coupled to the IF source. Refer to the Typical Operating

Characteristics for plots of Input and Output Impedance

vs. Frequency.

Local-Oscillator Inputs

The LO and LO pins are terminated with 50Ω on-chip

resistors. AC couple the LO signal to these pins. If a

single-ended LO source is used, connect LO directly to

GND.

Advanced System

Power Management

RXEN and TXEN are the two separate power-control

inputs for the receiver and the transmitter. If both inputs

are at logic 0, the part enters shutdown mode and the

supply current drops below 1µA. When one input is

brought to a logic 1, the corresponding function is

enabled. If RXEN and TXEN are both set to logic 1, the

part enters standby mode as described in the Standby

Mode section. Table 1 summarizes these operating

modes.

Power-down is guaranteed with a control voltage at or

below 0.6V. The power-down function is designed to

reduce the total power consumption to less than 1µA in

less than 2.5µs. Complete power-up will happen in the

same amount of time.

Table 1. Advanced System Power-

Management Functions

RXEN

0

0

1

1

TXEN

0

1

0

1

FUNCTION

Shutdown

Transmit

Receive

Standby Mode

10 ______________________________________________________________________________________

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