EVALUATION KIT AVAILABLE
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
General Description
Features
● 400MHz to 2.5GHz Operation
The MAX2680/MAX2681/MAX2682 miniature, low-cost,
low-noise downconverter mixers are designed for low-
voltage operation and are ideal for use in portable com-
munications equipment. Signals at the RF input port are
mixed with signals at the local oscillator (LO) port using
a double-balanced mixer. These downconverter mixers
operate with RF input frequencies between 400MHz and
2500MHz, and downconvert to IF output frequencies
between 10MHz and 500MHz.
● +2.7V to +5.5V Single-Supply Operation
● Low Noise Figure: 6.3dB at 900MHz (MAX2680)
● High Input Third-Order Intercept Point
(IIP3 at 2450MHz)
• -6.9dBm at 5.0mA (MAX2680)
• +1.0dBm at 8.7mA (MAX2681)
• +3.2dBm at 15.0mA (MAX2682)
● < 0.1μA Low-Power Shutdown Mode
The MAX2680/MAX2681/MAX2682 operate from a single
+2.7V to +5.5V supply, allowing them to be powered
directly from a 3-cell NiCd or a 1-cell Lithium battery.
These devices offer a wide range of supply currents and
input intercept (IIP3) levels to optimize system perfor-
mance. Additionally, each device features a low-power
shutdown mode in which it typically draws less than 0.1μA
of supply current. Consult the Selector Guide for various
combinations of IIP3 and supply current.
● Ultra-Small Surface-Mount Packaging
The MAX2680/MAX2681/MAX2682 are manufactured on
a high-frequency, low-noise, advanced silicon-germanium
process and are offered in the space-saving 6-pin SOT23
package.
Ordering Information
Applications
PIN-
SOT
● 400MHz/900MHz/2.4GHz ISM-Band Radios
● Personal Communications Systems (PCS)
● Cellular and Cordless Phones
● Wireless Local Loop
● IEEE-802.11 and Wireless Data
PART
TEMP RANGE
PACKAGE TOP MARK
MAX2680EUT-T -40°C to +85°C
MAX2681EUT-T -40°C to +85°C
MAX2682EUT-T -40°C to +85°C
6 SOT23
6 SOT23
6 SOT23
AAAR
AAAS
AAAT
Selector Guide
FREQUENCY
1950MHz
900MHz
2450MHz
I
CC
PART
(mA)
IIP3
(dBm)
NF
(dB)
GAIN
(dB)
IIP3
(dBm)
NF
(dB)
GAIN
(dB)
IIP3
(dBm)
NF
(dB)
GAIN
(dB)
MAX2680
MAX2681
MAX2682
5.0
8.7
-12.9
-6.1
6.3
7.0
6.5
11.6
14.2
14.7
-8.2
+0.5
+4.4
8.3
11.1
10.2
7.6
8.4
-6.9
+1.0
+3.2
11.7
12.7
13.4
7.0
7.7
7.9
15.0
-1.8
10.4
Typical Operating Circuit appears at end of data sheet.
19-4786; Rev 2; 8/03