U4311B-FS ATMEL | Alldatasheet

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Technical content

Features

/C0068Usable for amplitude- and frequency-modulated transmission systems /C0068Extremely low quiescent current (approximately 1 mA in standby mode due to wake-up concept) /C0068Wide power supply voltage range 3 to 13 V /C0068Sensitive IF amplifier for 10.7-MHz operating frequency /C0068Logarithmic AM demodulator /C0068FM demodulator /C0068Monoflop output to wake up a microcontroller /C0068High-performance operational amplifier to realize a data recovering filter /C0068Non-inverting clamping comparator with amplitude- depending hysteresis for data regeneration Block Diagram Non – invert. clamping comparator MonoflopBandgap Quadrature detector Operational amplifier IF amplifier Internal RF Level Wake up 13 3 Wake-up out V S 20 1181611 Data out Data filter FM outlog AM out

10.7 MHz

V Ref = 2.4V 12648 V Ref = 2.4 V Figure 1. Block diagram

Ordering Information

Extended Type Number Package Remarks U4311B-MFSG3 SSO20 Ambient temperature up to +105°C

Figure 2. Pinning

1 OP in+ OP amplifier non-inverted input

2 OP out OP amplifier output

3 RC wake RC wake –up reset time

5 GND2 Ground of the logical circuits

6 Comp out Comparator output

7 RC – Comparator time constant

9 RC+ Comparator time constant

11 AM out AM current output

12 IFin IF input

13 SW out Wake-up output

15 GND1 Ground of the analog circuits

16 Discr FM discriminator tank

17 V Ref Reference voltage

18 FM out FM discriminator output

19 V S Supply voltage

20 OP in– OP amplifier inverted input

Rev. A3, 28-Sep-00 3 (13)

Electrical Characteristics

V S = 5 V , Tamb = 25°C, fin = 10.7 MHz; FM part: fmod = 1 kHz, fdev = 22.5 kHz; AM part: fmod = 1 kHz, m = 100% unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Characteristics Supply-voltage range Pin 19 V S 3 12 V Quiescent supply current Pin 19 Iq 1 1.3 mA Active supply current Pin 19 Iact 2.8 3.6 mA Bandgap Regulated voltage Pin 17 V Ref 2.3 2.4 2.5 V Output current Pin 17 IRef 5 mA Source resistance Pin 17 R Ref 2.3 5 /C0087 External capacitor Pin 17 C Ref 10 /C0109F Power-supply rejection ratio f = 50 Hz Pin 17 psrr 60 dB IF amplifier Input resistance Pin 12 R in 180 330 520 /C0087 Input capacitance Pin 12 C in 5 pF Typical internal 3 dB frequency IF level 70 dB/C0109V Pins 12 and 18 f3dB 8 12 MHz –3 dB limiting point Pin 12 V FM3dB 30 dB /C0109V Recovered data voltage Pin 18 V FMout 50 130 230 mV FM detector output resistance Pin 18 R FMout 50 k/C0087 AM rejection ratio m = 30% Pins 12 and 18AM rr 25 dB Maximum AM input voltage Pin 12 VAMmax 90 dB /C0109V AM quiescent current Pin 11 IAMout 10 22 37 /C0109/C0065 Maximum AM current Pin 11 IAMoutmax 100 /C0109/C0065 Operational amplifier Gain-bandwidth product Pins 1, 2 and 20ft 3 4 6.5 MHz Excess phase Pins 1, 2 and 20/C0100 80 degree Open loop gain Pins 1, 2 and 20g0 50 70 95 dB Output voltage range Pin 2 ∆Vout 1.55 V Common mode input voltage Pins 1 and 20 V in 0.7 1.7 V Input offset voltage Pins 1 and 20 Vos –2.5 0 +2.5 mV Maximum output current Pin 2 Iout 5 mA Common-mode rejection ratio Pin 1 and 20 cmrr 65 85 dB Total harmonic distortionV in < 300 mV , f = 33 kHz, unity gain circuit Pin 2 thd 1 3 %

Rev. A3, 28-Sep-004 (13) Electrical Characteristics (continued) V S = 5 V , Tamb = 25°C, fin = 10.7 MHz; FM part: fmod = 1 kHz, fdev = 22.5 kHz; AM part: fmod = 1 kHz, m = 100% unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Power-supply rejection ratio f = 50 Hz Pin 2 psrr 65 85 dB Clamping comparator Typical common-mode input voltage range Pin 2 V cmvr 0.8 1.6 V Maximum distortion voltage V signal = 100 mV , C+ = C– = 200 nF, fdisto = 50 Hz, fsignal = 1 kHz Pin 2 V dmax 200 mV Output voltage V 2 > (V7 + V9) /2 (10-k/C0087 load to VRef) Pin 6 V cout V Ref V Output voltage V 2 < (V7 + V9 ) /2 (10-k/C0087 load to VRef) Pin 6 V cout 0 150 250 mV Wake-up circuit Minimum wake-up level Pin 12 V in 40 dB /C0109V 1) Internal charging resistor Pin 3 R int 1.5 k/C0087 Threshold voltage Pin 3 V th 1.6 V Output switch current Pin 13 ISW 180 250 550 /C0109A Output switch voltage Pin 13 V SW 5.5 V 2) External wake-up resistor Pins 3 and 17 RWU 22 k/C0087 External wake-up capacitor Pins 3 and 17 C WU 10 /C0109F Hold time (± 30%) th /C0025 1.5 /C0032 RWU /C0032 CWU s 3) Delay time (± 30%) td /C0025 C WU /C0032 0.75 k/C0087 s 3) 1) Measured at Pin 9, (12) referred to 330 /C0087 2) Protected by a Z-diode, see figure 13 3) V alid for 0.1 /C0109F ≤ CWU ≤ 10 /C0109F and 22 k/C0087 ≤ RWU ≤ 680 k/C0087

comparator and voltage regulator. regarding transmission distance and data recognition. any further active component. Pin 13 and can be used to wake up a microcontroller. operates as a data regenerator. Figure 3. Principle function of the clamping comparator

Rev. A3, 28-Sep-0012 (13) Application The U4311B-FS is well-suited to implement UHF remote control or data transmission systems, based on a low- current superheterodyne receiver concept. SAW-devices may be used in the transmitter’s as well as in the receiver local oscillator. The front end should be a discrete circuit application with low-current UHF transistors such as S822T or S852T (Vishay Telefunken). The frequency of the local oscillator can be determined either by coaxial resonators or SAW devices. Due to the large SAW-resonator, tolerance an IF bandwidth /C0042 and in a FM system additionally the discriminator amplitude charac- teristic (see figure 28) /C0042 of 300 kHz or higher is pro- posed. As the circuit needs only 3.0 V supply voltage for operation, the front end may be a stacked design in order to achieve a total receiver current consumption of approx- imately 1 mA. Figure 29 shows a principle receiver concept diagram. 350 /C0109A350 /C0109A V S RF in 1 mA Data out Signal path Power supply 95 10137 Figure 29. Principle diagram of a UHF remote control receiver

Package Information

Dimensions in mm 6.75 6.50 0.25 0.65 5.85 1.30 0.15 0.05 5.7 5.3 4.5 4.3 6.6 6.3 0.15 20 11 11 0

Rev. A3, 28-Sep-00 13 (13) Ozone Depleting Substances Policy Statement It is the policy of Atmel Germany GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. V arious national and international initiatives are pressing for an earlier ban on these substances. Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. Data sheets can also be retrieved from the Internet: http://www.atmel–wm.com Atmel Germany GmbH, P .O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423