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MAX9985
Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch
Highest Linearity, Lowest Noise 700MHz to 1000MHz Downconverting SiGe Mixer for 2.5G and 3G Base Stations
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Status
Active: In Production.
Description
The MAX9985 high-linearity, dual-channel downconversion mixer is designed to provide approximately 6dB gain, +28.5dBm of IIP3, and 10.5dB of noise figure (NF) ideal for diversity receiver applications. With a 700MHz to 1000MHz RF frequency range and a 570MHz to 865MHz LO frequency range, this mixer is ideal for low-side LO injection architectures. In addition, the broad frequency range makes the MAX9985 ideal for GSM 850/950, 2G/2.5G EDGE, WCDMA, cdma2000®, and iDEN® base-station applications.
The MAX9985 dual-channel downconverter achieves ahigh level of component integration. The MAX9985 integrates two double-balanced active mixer cores, two LO buffers, a dual-input LO selectable switch, and a pair of differential IF output amplifiers. In addition, integrated on-chip baluns at the RF and LO ports allow for single-ended RF and single-ended LO inputs. The MAX9985 requires a typical 0dBm LO drive. Supply current is adjustable up to 400mA.
The MAX9985 is available in a 36-pin thin QFN package (6mm x 6mm) with an exposed paddle. Electrical performance is guaranteed over the extended temperature range, from TC = -40°C to +85°C.
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Data Sheet
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An evaluation kit is available: MAX9985EVKIT
Key Features
- 700MHz to 1000MHz RF Frequency Range
- 570MHz to 865MHz LO Frequency Range
- 50MHz to 250MHz IF Frequency Range
- 6dB Typical Conversion Gain
- 10.5dB Typical Noise Figure
- +28.5dBm Typical Input IP3
- +16.2dBm Typical Input 1dB Compression Point
- 77dBc Typical 2RF-2LO Spurious Rejection at PRF = -10dBm
- Dual Channels Ideal for Diversity Receiver Applications
- 47dB Typical Channel-to-Channel Isolation
- -3dBm to +3dBm LO Drive
- Integrated LO Buffer
- Internal RF and LO Baluns for Single-Ended Inputs
- Built-In SPDT LO Switch with 43dB LO1-to-LO2 Isolation and 50ns Switching Time
- Pin-Compatible with MAX9995/MAX9995A 1700MHz to 2200MHz Mixers
- Lead-Free Package Available
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Applications/Uses
- 850MHz WCDMA Base Stations
- cdmaOne™ and cdma2000® Base Stations
- Digital and Spread-Spectrum Communication Systems
- Fixed Broadband Wireless Access
- GSM 850/GSM 950, 2G/2.5G EDGE Base Stations
- iDEN® Base Stations
- Microwave Links
- Military Systems
- Private Mobile Radios
- Wireless Local Loop
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Key Specifications:
| Downconverter Mixers |
| Part Number |
Channels |
RF Freq.
(MHz) |
RF Freq.
(MHz) |
LO Freq.
(MHz) |
LO Freq.
(MHz) |
IF Freq.
(MHz) |
IF Freq.
(MHz) |
Gain
(dB) |
Input IP3
(dBm) |
Noise Figure
(dB) |
2RF-2LO/ 2LO-2RF
(dBc) |
VCC
(V) |
5V Supply Current
(mA) |
Footprint
(mm x mm) |
Package/Pins |
Budgetary Price |
| min |
max |
min |
max |
min |
max |
See Notes |
| MAX9985 |
2 |
700 |
1000 |
570 |
865 |
50 |
250 |
6 |
28.5 |
10.5 |
77 |
4.75 to 5.25 |
400 |
6.0 x 6.0 |
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$9.98 @1k |
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See All Downconverter Mixers (44)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Pin Configuration
Application Notes
Product Guides
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9985ETX
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Active |
TQFN;36 pin;37.2 mm²
Outline Drawing:21-0141 (PDF)
Land Pattern: 90-0049 (PDF)
Use pkgcode/variation: T3666-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX9985ETX+
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Active |
TQFN;36 pin;37.2 mm²
Outline Drawing:21-0141 (PDF)
Land Pattern: 90-0049 (PDF)
Use pkgcode/variation: T3666+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9985ETX+T
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Active |
TQFN;36 pin;37.2 mm²
Outline Drawing:21-0141 (PDF)
Land Pattern: 90-0049 (PDF)
Use pkgcode/variation: T3666+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9985ETX-T
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Active |
QFN;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-0705
Rev 0;
2007-02-09
This page last modified: 2009-10-15
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