Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX19995ETX+

General Description

The MAX19995 dual-channel downconverter provides

9dB of conversion gain, +24.8dBm input IP3,

+13.3dBm 1dB input compression point, and a noise

figure as low as 9dB for 1700MHz to 2200MHz diversity

receiver applications. With an optimized LO frequency

range of 1400MHz to 2000MHz, this mixer is ideal for

low-side LO injection architectures. High-side LO injec-

tion is supported by the MAX19995A, which is pin-pin

and functionally compatible with the MAX19995.

In addition to offering excellent linearity and noise per-

formance, the MAX19995 also yields a high level of

component integration. This device includes two dou-

ble-balanced passive mixer cores, two LO buffers, a

dual-input LO selectable switch, and a pair of differen-

tial IF output amplifiers. Integrated on-chip baluns allow

for single-ended RF and LO inputs.

The MAX19995 requires a nominal LO drive of 0dBm

and a typical supply current of 297mA at V

= 5.0V or

212mA at V

= 3.3V.

The MAX19995/MAX19995A are pin compatible with

the MAX19985/MAX19985A series of 700MHz to

1000MHz mixers and pin similar with the MAX19997A/

MAX19999 series of 1800MHz to 4000MHz mixers,

making this entire family of downconverters ideal for

applications where a common PCB layout is used

across multiple frequency bands.

The MAX19995 is available in a 6mm x 6mm, 36-pin

thin QFN package with an exposed pad. Electrical per-

formance is guaranteed over the extended temperature

range, from T

= -40°C to +85°C.

Applications

UMTS/WCDMA/LTE Base Stations

cdma2000

Base Stations

DCS1800 and EDGE Base Stations

PCS1900 and EDGE Base Stations

PHS/PAS Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

♦ 1700MHz to 2200MHz RF Frequency Range

♦ 1400MHz to 2000MHz LO Frequency Range

♦ 1750MHz to 2700MHz LO Frequency Range

(MAX19995A)

♦ 50MHz to 500MHz IF Frequency Range

♦ 9dB Typical Conversion Gain

♦ 9dB Typical Noise Figure

♦ +24.8dBm Typical Input IP3

♦ +13.3dBm Typical Input 1dB Compression Point

♦ 79dBc Typical 2RF-2LO Spurious Rejection at

= -10dBm

♦ Dual Channels Ideal for Diversity Receiver

Applications

♦ 49dB Typical Channel-to-Channel Isolation

♦ Low -3dBm to +3dBm LO Drive

♦ Integrated LO Buffer

♦ Internal RF and LO Baluns for Single-Ended

Inputs

♦ Built-In SPDT LO Switch with 56dB LO-to-LO

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX19985/MAX19985A/

MAX19995A Series of 700MHz to 2200MHz Mixers

♦ Pin Similar to the MAX19997A/MAX19999 Series

of 1800MHz to 4000MHz Mixers

♦ Single +5.0V or +3.3V Supply

♦ External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced-

Performance Mode

MAX19995

Dual, SiGe, High-Linearity, 1700MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4253; Rev 0; 12/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

cdma2000 is a registered trademark of Telecommunications Industry Association.

PART

TEMP RANGE

PIN-PACKAGE

MAX19995ETX+

-40°C to +85°C

36 Thin QFN-EP*

MAX19995ETX+T -40°C to +85°C

36 Thin QFN-EP*

Pin Configuration and Typical Application Circuit appear at

end of data sheet.

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

T = Tape and reel.

Summary of content (29 pages)

PAGE 1
9-4253; Rev 0; 12/08 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995 dual-channel downconverter provides 9dB of conversion gain, +24.8dBm input IP3, +13.3dBm 1dB input compression point, and a noise figure as low as 9dB for 1700MHz to 2200MHz diversity receiver applications. With an optimized LO frequency range of 1400MHz to 2000MHz, this mixer is ideal for low-side LO injection architectures.
PAGE 2
MAX19995 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V LO1, LO2 to GND ...............................................................±0.3V Any Other Pins to GND...............................-0.3V to (VCC + 0.3V) RFMAIN, RFDIV, and LO_ Input Power ..........................+15dBm RFMAIN, RFDIV Current (RF is DC shorted to GND through a balun)............
PAGE 3
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS RF Frequency fRF (Note 5) 1700 2200 MHz LO Frequency fLO (Note 5) 1400 2000 MHz Using Mini-Circuits TC4-1W-17 4:1 transformer as defined in the typical application circuit, IF matching components affect the IF frequency range (Note 5) 100 500 MHz 50 250 MHz -3 +3 dBm IF Frequency f IF Using alternative Mini-Circuits TC4-1W-7A 4:1 transformer,
PAGE 4
MAX19995 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch +5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 1510MHz to 1810MHz, fIF = 190MHz, fRF > fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.
PAGE 5
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch (Typical Application Circuit optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 1510MHz to 1810MHz, fIF = 190MHz, fRF > fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.
PAGE 6
MAX19995 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch +5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 1700MHz to 2000MHz, fLO = 1510MHz to 1810MHz, fIF = 190MHz, fRF > fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.
PAGE 7
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch (Typical Application Circuit. Typical values are at VCC = +3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 1800MHz, fLO = 1610MHz, fIF = 190MHz, TC = +25°C, unless otherwise noted.) (Note 6) PARAMETER Input Compression Point Input Intercept Point SYMBOL IP1dB IIP3 CONDITIONS MIN TYP MAX UNITS (Note 7) 8.9 dBm fRF1 - fRF2 = 1MHz 18.5 dBm 0.
PAGE 8
Typical Operating Characteristics (Typical Application Circuit, optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) TC = +85°C TC = +25°C 7 9 8 PLO = -3dBm, 0dBm, +3dBm 2300 1700 2500 INPUT IP3 vs. RF FREQUENCY MAX19995 toc04 25 MAX19995 toc03 1700 2500 TC = -30°C 22 TC = +25°C 2100 25 PLO = -3dBm PLO = 0dBm PRF = -5dBm/TONE 24 23 VCC = 5.
PAGE 9
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 2RF-2LO RESPONSE vs. RF FREQUENCY 60 70 60 TC = +25°C 50 50 2100 2300 50 1700 2500 3RF-3LO RESPONSE vs. RF FREQUENCY 2300 2500 1700 1900 TC = +85°C 75 65 PRF = -5dBm 85 75 PLO = -3dBm, 0dBm, +3dBm 65 55 2300 2500 PRF = -5dBm 85 VCC = 5.25V 75 VCC = 4.75V 65 55 1700 RF FREQUENCY (MHz) 12 TC = +25°C 2100 2300 RF FREQUENCY (MHz) 2500 2100 2300 2500 INPUT P1dB vs.
PAGE 10
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) TC = -30°C, +25°C, +85°C 35 45 PLO = -3dBm, 0dBm, +3dBm 35 30 1900 2100 2300 1900 2100 2300 2500 1700 1900 2100 2300 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs.
PAGE 11
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch LO LEAKAGE AT RF PORT vs. LO FREQUENCY -40 TC = -30°C, +25°C, +85°C -50 -60 1600 1800 2000 2200 -40 -50 PLO = -3dBm, 0dBm, +3dBm -60 MAX19995 toc30 -50 VCC = 4.75V, 5.0V, 5.25V -60 1600 1800 2000 2200 2400 1400 1600 1800 2000 2200 LO FREQUENCY (MHz) LO FREQUENCY (MHz) 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs.
PAGE 12
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) RF PORT RETURN LOSS vs. RF FREQUENCY IF PORT RETURN LOSS vs. IF FREQUENCY PLO = -3dBm, 0dBm, +3dBm 15 20 5 VCC = 4.75V, 5.0V, 5.25V 10 15 25 0 MAX19995 toc39 fLO = 1610MHz LO SELECTED RETURN LOSS (dB) 10 LO SELECTED RETURN LOSS vs.
PAGE 13
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch LO LEAKAGE AT IF PORT vs. LO FREQUENCY (VARIOUS VALUES OF L3 AND L6) CHANNEL ISOLATION (dB) 50 45 0Ω 3.6nH 40 -30 -40 6.8nH 3.6nH -50 60 10nH MAX19995 toc48 0Ω RF-TO-IF ISOLATION (dB) 6.8nH 55 -20 RF-TO-IF ISOLATION vs. RF FREQUENCY (VARIOUS VALUES OF L3 AND L6) MAX19995 toc47 10nH LO LEAKAGE AT IF PORT (dBm) 60 MAX19995 toc46 CHANNEL ISOLATION vs.
PAGE 14
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the UMTS band, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) CONVERSION GAIN vs. RF FREQUENCY TC = +85°C 9 8 PLO = -3dBm, 0dBm, +3dBm 7 7 VCC = 4.75V, 5.0V, 5.25V 6 1700 2500 2500 1700 TC = +85°C 26 25 PLO = -3dBm, 0dBm, +3dBm 22 21 20 2100 2300 2500 1900 2100 2300 VCC = 5.
PAGE 15
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 70 60 2300 1700 2500 1700 2500 75 TC = +85°C 75 PLO = -3dBm, 0dBm, +3dBm 2100 2300 INPUT P1dB vs. RF FREQUENCY 1900 2100 2300 65 2500 VCC = 5.25V 1700 1900 13 TC = +25°C 12 2100 2300 2500 RF FREQUENCY (MHz) INPUT P1dB vs. RF FREQUENCY 16 MAX19995 toc65 15 INPUT P1dB (dBm) 14 MAX19995 toc60 75 INPUT P1dB vs. RF FREQUENCY 16 MAX19995 toc64 TC = +85°C 15 VCC = 5.
PAGE 16
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the UMTS band, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) CHANNEL ISOLATION vs. RF FREQUENCY TC = -30°C, +25°C, +85°C 35 1900 2100 2300 30 1700 2100 2300 1700 2500 2100 2300 LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs.
PAGE 17
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch LO LEAKAGE AT RF PORT vs. LO FREQUENCY TC = -30°C, +25°C, +85°C -60 -70 1600 1800 2000 2200 -60 2400 MAX19995 toc78 -60 -70 1400 1600 1800 2000 2200 2400 1400 1600 1800 2000 2200 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs. LO FREQUENCY 2LO LEAKAGE AT RF PORT vs.
PAGE 18
Typical Operating Characteristics (continued) (Typical Application Circuit, optimized for the UMTS band, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) RF PORT RETURN LOSS vs. RF FREQUENCY 30 40 VCC = 4.75V, 5.0V, 5.
PAGE 19
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 6 8 7 PLO = -3dBm, 0dBm, +3dBm 2100 2300 1700 2500 INPUT IP3 vs. RF FREQUENCY 2100 2300 1700 2500 MAX19995 toc93 TC = +85°C VCC = 3.3V PRF = -5dBm/TONE 22 16 VCC = 3.3V PRF = -5dBm/TONE 18 16 PLO = -3dBm, 0dBm, +3dBm VCC = 3.6V 20 18 16 VCC = 3.0V 12 12 2100 2300 2500 1700 RF FREQUENCY (MHz) 10 9 12 11 10 9 6 2300 RF FREQUENCY (MHz) 2500 2500 12 VCC = 3.0V 11 10 9 VCC = 3.3V, 3.
PAGE 20
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 2.49kΩ, VCC = +3.3V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) 50 TC = +25°C 40 2300 2500 RF FREQUENCY (MHz) 2100 60 50 TC = +25°C TC = -30°C 3RF-3LO RESPONSE (dBc) PRF = -5dBm VCC = 3.3V 70 30 2300 2500 1700 60 2300 50 PLO = -3dBm, 0dBm, +3dBm 40 2500 VCC = 3.6V 1900 2100 2300 12 VCC = 3.
PAGE 21
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch TC = -30°C, +25°C, +85°C 1900 2100 2300 1900 2300 MAX19995 toc110 1700 2500 1900 2100 2300 RF FREQUENCY (MHz) LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY -40 TC = +85°C -45 -50 TC = +25°C VCC = 3.3V -35 -40 PLO = -3dBm -45 -50 PLO = 0dBm -55 TC = -30°C -30 2300 1700 LO FREQUENCY (MHz) 1900 2100 2300 45 40 35 VCC = 3.
PAGE 22
Typical Operating Characteristics (continued) (Typical Application Circuit, R1 = R4 = 909Ω, R2 = R5 = 2.49kΩ, VCC = +3.3V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 190MHz IF, TC = +25°C, unless otherwise noted.) TC = -30°C -40 -50 TC = +25°C -60 -30 -40 -50 PLO = -3dBm, 0dBm, +3dBm -60 -20 VCC = 3.6V -30 -40 -50 VCC = 3.0V -60 VCC = 3.3V TC = +85°C -70 -70 1600 1800 2000 2200 1800 2000 2200 2400 1400 2000 2200 2LO LEAKAGE AT RF PORT vs.
PAGE 23
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 20 30 40 VCC = 3.0V, 3.3V, 3.6V 10 15 VCC = 3.3V 5 10 MAX19995 toc128 5 0 LO SELECTED RETURN LOSS (dB) PLO = -3dBm, 0dBm, +3dBm fLO = 1610MHz MAX19995 toc86 IF PORT RETURN LOSS (dB) 10 0 MAX19995 toc126 fIF = 190MHz VCC = 3.3V PLO = 0dBm PLO = +3dBm 15 20 25 PLO = -3dBm 30 20 1700 1900 2100 2300 50 2500 140 230 320 1400 500 410 1600 VCC = 3.
PAGE 24
MAX19995 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Pin Description PIN NAME 1 RFMAIN 2 TAPMAIN 3, 5, 7, 12, 20, 22, 24, 25, 26, 34 GND Ground 4, 6, 10, 16, 21, 30, 36 VCC Power Supply. Bypass to GND with capacitors shown in the Typical Application Circuit as close as possible to the pin. 8 TAPDIV Diversity Channel Balun Center Tap. Bypass to GND with 39pF and 0.
PAGE 25
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch The MAX19995 is a dual-channel downconverter designed to provide 9dB of conversion gain, +24.8dBm input IP3, +13.3dBm 1dB input compression point, and a noise figure of 9dB. In addition to its high-linearity performance, the MAX19995 achieves a high level of component integration. The device integrates two double-balanced mixers for two-channel downconversion.
PAGE 26
MAX19995 Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch Differential IF IND_EXT_ Inductors The MAX19995 has an IF frequency range of 50MHz to 500MHz, where the low-end/high-end frequency depends on the frequency response of the external IF components. Note that these differential ports are ideal for providing enhanced IIP2 performance.
PAGE 27
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX19995 Table 1. Component Values COMPONENT VALUE C1, C2, C7, C8, C14, C16 39pF C3, C6 0.033µF C4, C5 — C9, C13, C15, C17, C18 0.
PAGE 28
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch MAX19995 Typical Application Circuit C19 T1 L1 VCC IF MAIN OUTPUT C21 R3 L2 4:1 R1 C20 VCC RF MAIN INPUT TAPMAIN C3 C2 GND VCC VCC C4 GND VCC VCC C5 GND C6 C7 TAPDIV RFDIV RF DIV INPUT C17 28 N.C.
PAGE 29
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch 28 N.C. 29 LO_ADJ_M 30 VCC 31 IND_EXTM 32 IFM- 33 IFM+ 34 GND 35 IFM_SET 36 VCC TOP VIEW + RFMAIN 1 MAX19995 27 LO2 26 GND TAPMAIN 2 GND 3 25 GND VCC 4 24 GND GND 5 23 LOSEL VCC 6 22 GND GND 7 21 VCC 20 GND 19 LO1 16 17 18 VCC LO_ADJ_D N.C.