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MAX9989, MAX9990
+14dBm to +20dBm LO Buffers with ±1dB Variation
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Status
Active: In Production.
Description
The MAX9989 and MAX9990 LO buffers provide the high output (+14dBm to +20dBm) necessary to drive the LO inputs of high-linearity passive mixers, while offering 40dB reverse isolation to prevent LO pulling. The MAX9989 is internally matched for the cellular/GSM bands, and the MAX9990 is matched for the DCS/PCS/UMTS bands.
The Typical Application Circuit provides a nominal +17dBm output power with ±1dB variation over supply, temperature, and input power. With two optional resistors, the output power can be precision set from +14dBm to +20dBm. The devices offer more than 35dB main driver output to PLL amp output isolation. Each device is offered in a 5mm x 5mm 20-pin thin QFN package with exposed paddle.
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Data Sheet
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An evaluation kit is available: MAX9989EVKIT, MAX9990EVKIT
Key Features
- ±1dB Output Power Variation
- +14dBm to +20dBm Adjustable Output Power
- 40dB Reverse Isolation
- Better Than 35dB Main Driver Output to PLL Amp Output Isolation
- Low Output Noise: -170dBc/Hz at +17dBm
- 110mA Supply Current at +17dBm
- ESD Protection
- Isolated PLL Output (+3dBm)
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Applications/Uses
- Cellular/GSM/DCS/PCS/UMTS Base Station Tx/Rx LO Drive
- Coherent Receivers
- ISM Wireless LAN
- Local Multipoint Distribution Service
- Point-to-Point Systems
- Wireless Local Loop (WLL)
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Key Specifications:
| VCO Buffers |
| Part Number |
LO Driver Outputs |
PLL Driver Outputs |
RF Freq.
(MHz) |
RF Freq.
(MHz) |
POUT
(dBm) |
POUT
(dBm) |
VCC
(V) |
ISUPPLY
(mA) |
Footprint
(mm x mm) |
Package/Pins |
Budgetary Price |
| min |
max |
min |
max |
See Notes |
| MAX9989 |
Yes |
Yes |
700 |
1100 |
14.3 |
19.7 |
4.75 to 5.25 |
105 |
5.0 x 5.0 |
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$3.53 @1k |
| MAX9990 |
1500 |
2200 |
14.2 |
19.5 |
111 |
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$3.53 @1k |
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See All VCO Buffers (8)
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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
 Typical Operating Circuit
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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| MAX9989ETP
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Active |
TQFN;20 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0008 (PDF)
Use pkgcode/variation: T2055-3*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX9989ETP+
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Active |
TQFN;20 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0008 (PDF)
Use pkgcode/variation: T2055+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9989ETP+T
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Active |
QFN;20 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX9989ETP-T
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Active |
QFN;20 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX9990ETP
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Active |
TQFN;20 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0008 (PDF)
Use pkgcode/variation: T2055-3*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX9990ETP+
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Active |
TQFN;20 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0008 (PDF)
Use pkgcode/variation: T2055+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9990ETP+T
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Active |
QFN;20 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX9990ETP-T
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Active |
QFN;20 pin
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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Similar Products by Function
Evaluation Kits
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More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2486
Rev 0;
2002-08-29
This page last modified: 2007-07-16
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