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MAX2681EUT-T

400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers

Maxim Integrated 

MAX2680/MAX2681/

MAX2682

400MHz to 2.5GHz, Low-Noise,

SiGe Downconverter Mixers

Typical Operating Characteristics (continued)

(Typical Operating Circuit, VCC = SHDN = +3.0V, PRFIN = -25dBm, PLO = -5dBm, TA = +25°C, unless otherwise noted.)

MAX2680

TURN-OFF/ON CHARACTERISTICS

SHDN

2V/div

MAX2681

TURN-OFF/ON CHARACTERISTICS

SHDN

2V/div

MAX2682

TURN-OFF/ON CHARACTERISTICS

SHDN

2V/div

IFOUT

50mV/

div

Z1 = 39pF

500ns/div

IFOUT

50mV/

div

Z1 = 39pF

500ns/div

IFOUT

50mV/

div

Z2 = 39pF

500ns/div

Pin Configuration

TOP VIEW

LO 1

GND 2

MAX2680

MAX2681

MAX2682

6 SHDN

5 VCC

RFIN 3

4 IFOUT

SOT23-6

Pin Description

PIN

NAME

FUNCTION

1

LO

Local-Oscillator Input. Apply a local-oscillator signal with an amplitude of -10dBm to 0 (50Ω source).

AC-couple this pin to the oscillator with a DC-blocking capacitor. Nominal DC voltage is VCC - 0.4V.

2

GND Mixer Ground. Connect to the ground plane with a low-inductance connection.

3

RFIN

Radio Frequency Input. AC-couple to this pin with a DC-blocking capacitor. Nominal DC voltage is 1.5V.

See the Applications Information section for details on impedance matching.

4

IFOUT

Intermediate Frequency Output. Open-collector output requires an inductor to VCC. AC-couple to this pin

with a DC-blocking capacitor. See the Applications Information section for details on impedance matching.

5

VCC

Supply Voltage Input, +2.7V to +5.5V. Bypass with a capacitor to the ground plane. Capacitor value depends

upon desired operating frequency.

6

SHDN

Active-Low Shutdown. Drive low to disable all device functions and reduce the supply current to less than

5μA. For normal operation, drive high or connect to VCC.

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