MAX2680 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers

19-4786; Rev 1; 11/98
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400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
General Description
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.
The MAX2680/MAX2681/MAX2682 operate from a sin-
gle +2.7V to +5.5V supply, allowing them to be pow-
ered 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 performance. 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 cur-
rent.
The MAX2680/MAX2681/MAX2682 are manufactured
on a high-frequency, low-noise, advanced silicon-ger-
manium process and are offered in the space-saving
6-pin SOT23 package.
Features
o 400MHz to 2.5GHz Operation
o +2.7V to +5.5V Single-Supply Operation
o Low Noise Figure: 6.3dB at 900MHz (MAX2680)
o 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)
o <0.1µA Low-Power Shutdown Mode
o Ultra-Small Surface-Mount Packaging
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
SOT
TOP MARK
MAX2680EUT-T -40°C to +85°C 6 SOT23-6 AAAR
MAX2681EUT-T -40°C to +85°C 6 SOT23-6
MAX2682EUT-T -40°C to +85°C 6 SOT23-6
AAAS
AAAT
Applications
400MHz/900MHz/2.4GHz ISM-Band Radios
Personal Communications Systems (PCS)
Cellular and Cordless Phones
Wireless Local Loop
IEEE-802.11 and Wireless Data
Pin Configuration
TOP VIEW
LO 1
6 SHDN
GND 2
RFIN 3
MAX2680
MAX2681
MAX2682
5 V_CC
4 IFOUT
Typical Operating Circuit appears at end of data sheet.
SOT23-6
PART
I_CC
(mA)
MAX2680
5.0
MAX2681
8.7
MAX2682
15.0
IIP3
(dBm)
-12.9
-6.1
-1.8
900MHz
NF
(dB)
6.3
7.0
6.5
GAIN
(dB)
11.6
14.2
14.7
FREQUENCY
1950MHz
IIP3
(dBm)
NF
(dB)
GAIN
(dB)
-8.2
8.3
7.6
+0.5
11.1
8.4
+4.4
10.2
10.4
Selector Guide
IIP3
(dBm)
-6.9
+1.0
+3.2
2450MHz
NF
(dB)
11.7
12.7
13.4
GAIN
(dB)
7.0
7.7
7.9
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