MAX2171：Direct-Conversion to Low-IF Tuners for Digital Audio Broadcast

Highest Performance, Most Integrated Triple-Band Receivers for T-DMB/DAB/FM Digital Radios

The MAX2170/MAX2171 direct-conversion to low-IF tuners are designed for Digital Audio Broadcast (DAB) and Terrestrial Digital Multimedia Broadcast (T-DMB) applications, covering an input frequency range of 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz (L-Band), and also 87MHz to 108MHz (FM). The MAX2170/MAX2171 achieve a high level of component integration, allowing low-power, tuner-on-board designs. The direct-conversion to low-IF architecture eliminates the need for an IF-SAW filter while providing a balanced 2.048MHz center frequency baseband output to the demodulator. The MAX2170 provides a buffered reference clock at the crystal frequency, while the MAX2171 outputs a reference at 1/3rd of the crystal frequency. A sigma-delta fractional-N synthesizer is incorporated to optimize both close-in and wideband phase noise performances for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem. The MAX2170/MAX2171 are available in a 40-pin thin QFN package (6mm x 6mm) with an exposed paddle. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Key Features

+2.7V to +3.5V Supply Voltage Range
Low-IF Output Eliminates IF-SAW Filter
Integrated Low-IF Bandpass Filter
Sigma-Delta Fractional-N Synthesizer
+45dB Digital ACPR
3.5dB Typical Noise Figure for VHF-III (Includes On-Chip Tracking Filter)
3.1dB Typical Noise Figure for L-Band
VHF-III Sensitivity of -100dBm
L-Band Sensitivity of -99dBm
Baseband Overload Detector Controls RF AGC

Applications/Uses

Fixed and Mobile Digital Audio Broadcast (DAB)
Terrestrial Digital Multimedia Broadcast (T-DMB)

Parametrics

Part Number	Ref. Clock Freq. (MHz)	IF Output Freq. (MHz)	Noise Figure (dB)	V_SUPPLY (V)	I_SUPPLY (mA)	Applications	Solutions	Band/ Freq. (MHz)	Footprint (mm x mm)	Package/Pins	Budgetary Price
Part Number	Ref. Clock Freq. (MHz)	IF Output Freq. (MHz)	typ	V_SUPPLY (V)	I_SUPPLY (mA)	Applications	Solutions	Band/ Freq. (MHz)	Footprint (mm x mm)	Package/Pins	See Notes
MAX2170	24.576	2.048	2.9	2.7 to 3.5	62	DAB T-DMB	Automotive Consumer	168 to 240 1452 to 1492	6.0 x 6.0	TQFN/40	$3.48 @1k
MAX2171	24.576	2.048	3	2.7 to 3.5	62	DAB T-DMB	Automotive Consumer	87 to 108 168 to 240 1452 to 1492	6.0 x 6.0	TQFN/40	$3.48 @1k

Design kits & evaluation modules

MAX2170EVKIT

Ordering Information

Part Number	Status	Package	Temp	RoHS
MAX2171ETL+	Active: Data sheet on request only	TQFN,;40 pin;37.2 mm²	-40°C to +85°C	Lead Free
MAX2171ETL+T	Active: Data sheet on request only	TQFN,;40 pin;37.2 mm²	-40°C to +85°C	Lead Free
MAX2171ETL/V+	No Longer Available	TQFN,;40 pin;37.2 mm²	-40°C to +85°C	Lead Free
MAX2171ETL/V+T	No Longer Available	QFN;	-40°C to +85°C	See data sheet