atr2732 ATMEL Corporation, atr2732 Datasheet
atr2732
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atr2732 Summary of contents
Page 1
... Atmel ’s silicon-germanium BiCMOS process (SiGMOS). The ATR2732 carries out all functions of RF and IF processing, as well as the clock-signal generation for these functions. Therefore, there is an integrated fractional PLL, which, equivalent to most of the other functions, can be controlled via an external digital bus. The RF functions include LNA, down-conversion mixing, amplifying, detec- tion, and gain control ...
Page 2
... Pinning QFN64 VAMIXL VAVCOL TUNVL GDVCOL LNAVIN+ LNAVL+ LNAVL- LNAVIN- VALNA LNALO+ LNALO- AGCRF GNDLNA LNALIN+ LNALIN- IPINDIO ATR2732 [Preliminary] 2 Gain cntl Vtune gen. L-band VCO PLL VHF VCO frac. PLL ...
Page 3
... VTNKREF Output voltage for tuning the reference tank (-varactor) 39 TNKREFI Reference-tank connection for to generate the tuning voltages for the external VHF filters (varactors) 40 TNKREFO Reference-tank connection for to generate the tuning voltages for the external VHF filters (varactors) 4918DS–DAB–10/07 ATR2732 [Preliminary] 3 ...
Page 4
... Connection for reference clock crystal 60 VDD Supply for digital circuits 61 PFDOUTL Output of phase comparator for VCO for L-band (connected to PLL loop filter) 62 GDMIXL Ground (L-band mixer) 63 MILIN+ (Differential) Input of L-band mixer – 64 MILIN (Differential) Input of L-band mixer Paddle GND Ground ATR2732 [Preliminary] 4 4918DS–DAB–10/07 ...
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... Functional Description The ATR2732 front-end IC was developed as a tuner IC for DAB reception. It was designed for operation in L-band (1452 MHz to 1492 MHz) and VHF BIII (167 MHz to 240 MHz). The front end contains gain-controlled LNAs, an L-band mixer with a corresponding PLL, and a VHF-band mixer with a fractional PLL ...
Page 6
... Figure 3-1. 3.2 AGC in General There are three AGCs in the ATR2732, one for the RF signals (around the LNAs) (1) and (3), one for the very beginning of the IF path (mainly VHF mixer), and one for the IF amplifiers (5) down to the output to baseband (7). In these AGCs, the output signals of the relevant blocks are amplified, weakly band-pass fil- tered, rectified, and, finally, low-pass filtered ...
Page 7
... RSSI Measurement The ATR2732 offers the option of getting information about the field strength. This is not an absolute real-field-strength value, but an indication of in which range the field strength is avail- able. This information can be obtained from the 8 low bits of the status register. ...
Page 8
... IF frequency of 38.912 MHz for VHF or converted L-band signal is done by an additional on-chip VCO using an internal fractional-N PLL. Due to the digital tuning option of the reference frequency, the ATR2732 is able to support the single reference clock design if the baseband can support such a feature (as the ATR2740 does) ...
Page 9
... There are 16 registers. Fourteen of them are used to control the ATR2732. The two others, reg- isters 15 and 16, are Test Mode Registers. All these registers need to be reset by writing “0” to every bit of each register one time, before starting the configuration of the ATR2732. There are 4 address bits (bit 12 is address bit 0 ...
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... Parameters Supply voltage Operating case temperature Storage temperature Notes: 1. The part may not survive all maximums applied simultaneously! 5. Thermal Resistance Parameters Junction, case 6. Operating Range Parameters Supply voltage Ambient temperature ATR2732 [Preliminary] 10 Symbol Value V 4 –40 to +100 c T –40 to +150 stg ...
Page 11
... T = +25°C, 50 input match CC amb Pin Symbol leak V BUSH V BUSL per cet t sud t hda 46, 47 ATR2732 [Preliminary] Min. Typ. Max. Unit 3.0 3 µA 1 µ 150 mA 185 mA 140 – 0. ...
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... L-band Operation 9.1 Frequency range 8 dB SNR at IF output 9.4 Sensitivity to baseband, measured with sample application Maximum input power 9.5 level *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATR2732 [Preliminary +3.3V +25°C, 50 input match CC amb Pin Symbol 46 Rfin f Rfin Min ...
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... Not indicated tolerances ±0.05 Top 64 1 Pin 1 identification 16 Drawing-No.: 6.543-5119.01-4 Issue: 1; 31.05.05 4918DS–DAB–10/07 Package Remarks QFN64 9 mm QFN64 0.2 0.9 ±0.1 Z 10:1 0.23 ±0.07 ATR2732 [Preliminary] 9 mm, 0.5 mm pitch, lead-free 9 mm, 0.5 mm pitch, lead-free Bottom 5.8 ±0. 7.5 technical drawings according to DIN specifications 1 16 0.5 nom. 13 ...
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... Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4918DS-DAB-10/07 4918CS-DAB-03/07 ATR2732 [Preliminary] 14 History Put datasheet in the newest template Section 7 “Electrical Characteristics” number 3.3 on page 11 changed Put datasheet in the newest template Broadcast radio logo on page 1 deleted Table 2-1 “ ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © 2007 Atmel Corporation. All rights reserved. Atmel Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. International Atmel Asia ...