CHR2244

CHR2244 UMS | Alldatasheet

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Technical content

Ref. : DSCHR2244QDG5053 - 22 Feb 05 1/16 Specifications subject to change without notice united monolithic semiconductors S.A.S. Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France Tel. : +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09

5.8 GHz One Antenna Reflective Transponder for Tag

GaAs Monolithic Microwave IC

Description

The CHR2244 is a MMIC transponder dedicated to short range communications at 5.8GHz. It includes all the RF functions for bi -directional transmission and CMOS c ompatible interfaces. Only one antenna is necessary. Three modes are implemented : STANDBY : ultra low current AM detector, with a reduced bandwidth, providing a wake -up signal on SB_out output. This signal is a DC voltage. This output is active when and o nly when an AM modulated RF signal is applied to the RF input. DOWNLINK : low current AM detector, with optimized IF bandwidth, providing the demodulated data at the CMOS compatible DATA_out output. UPLINK : multiplier based on a passive reflective mixer. This circuit is manufactured on a MESFET process. It is supplied in plastic package (QFN-24). Main Features n 5.8GHz ISM band operating frequency n CMOS compatible n Ultra low Standby current n Integrated wake-up circuit n High detection sensitivity for Downlink n Reflective multiplier for Uplink n Single bias voltage n Low cost & high performances plastic package n Lead-free, Matt Tin (Green) solder plating Det T/R MOD WK_in DATA_outRF External components Vcc SB_out Transponder block diagram Main Characteristics Tamb = +25°C; Vcc = 3.1V Symbol Parameter Min Typ Max Unit Vcc_sb_i Standby DC current ( Without RF input signal) 8 14 µA RF_sb_p RF_dl_p Minimum power for Standby mode Minimum power for Downlink mode -39 -39 -43 -43 dBm dBm BW_dl AM demodulation frequency (Downlink) 250 500 kHz G_ul Uplink multiplier gain (DSB) -6.5 -4 dB BW_ul Uplink IF multiplier frequency band 0.1 10 MHz ESD Protections : Electrostatic discharge sensitive device observe handling precautions !

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 2/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Electrical Characteristics (Full operating range) Tamb = -30°C to +80°C Symbol Parameter Test Conditions Min Typ Max Unit Fop Operating RF frequency range (1) 5.725 5.8 5.875 GHz BW_rf RF bandwidth 50 MHz RL_rf (*) RF input return loss 50 Ω 12 7 dB Vcc Bias voltage 2.7 3.1 3.6 V WK_in_imp (*) WK_in port impedance 6 kΩ pF T/R_imp (*) T/R input port impedance 100 kΩ pF T/R_t (*) Transmit to Receive recovery time 150 µs R/T_t (*) Receive to Transmit recovery time 50 µs (1) The centre frequency can be adjusted by a matching network located between the antenna and the RF component. (*) Note : Min & Max values include technological spreads, supply & temperature range effect. STANDBY mode : T/R=‘0’ , MOD=‘0’ , WK_in=‘0’ Symbol Parameter Test Conditions Min Typ Max Unit SB_out_load Standby output port load impedance MΩ pF SB_out_v (*) Standby output port DC voltage high level (1) low level Vcc-1 Vcc V V RF_sb_bw Amplitude modulation frequency of RF for wake-up 250 500 kHz RF_sb_p (*) Amplitude modulated RF input power for wake-up (2) -38 -43 dBm Vcc_sb_i (*) Standby DC current (3) 8 20 µA (1) The SB_out voltage is high when the RF input signal is AM modulated. (2) Total transmitted power of the modulated signal (modulation index = 0.5) (3) Without RF input signal (*) Note : Min & Max values include technological spreads, supply & temperature range effect.

5.8 GHz One Antenna Reflective Tag CHR2244

Ref. : DSCHR2244QDG5053 - 22 Feb 05 3/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 DOWNLINK mode : T/R=‘0’ , MOD=‘0’ , WK_in=‘Vcc’ Symbol Parameter Test Conditions Min Typ Max Unit Data_out_load Downlink output port load impedance CMOS compatible Data_out_f Amplitude demodulation frequency 250 500 kHz Data_out_dc (*) Data_out signal duty cycle 40 50 60 % RF_dl_p (*) Amplitude modulated RF input power (1) -38 -43 dBm WK_in_i (*) WK_in DC current 200 500 µA (1) Total transmitted power of the modulated signal (modulation index = 0.5) (*) Note : Min & Max values include technological spreads, supply & temperature range effect. UPLINK mode : T/R=‘Vcc’ , WK_in=‘Vcc’ Symbol Parameter Test Conditions Min Typ Max Unit MOD_imp (*) Modulated signal input port impedance 100 kΩ pF MOD_v Modulated signal input port voltage Square wave (1) 0/Vcc MOD_f Uplink IF multiplier frequency 0.1 10 MHz G_ul (*) Uplink multiplier gain (DSB) -7 -4 dB WK_in_i (*) WK_in DC current 200 500 µA (1) The shape of the modulated signal can be optimized if better linearity is needed. (*) Note : Min & Max values include technological spreads, supply & temperature range effect. Absolute Maximum Ratings (1) Tamb = -30°C to +80°C Symbol Parameter Values Unit Vcc Bias voltage 5 V Wk_in_v Wk_in input voltage 5 V T/R_v T/R input voltage 5 V MOD_v MOD input voltage 5 V RF_sb_p RF_dl_p Maximum Standby and Downlink RF input power (2) +10 dBm Top Operating temperature range -30 to +80 °C Tstg Storage temperature range -55 to +125 °C (1) Operation of this device above anyone of these parameters may cause permanent damage. (2) Duration < 1s.

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 4/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Pin number Pin name 4, 5, 6, 8, 9, 10, 16, 18, 23, Non Connected

1 RF RF port

2 TR Transmit / Receive input port

3 MOD Modulation input port

7 SENS Stand-by sensitivity adjust port

11 Vcc Supply voltage

12 Ga_SB Stand-by amplifiers Gain adjust port

13 SB_out Stand-by output port

14 C4 External decoupling

15 DATA_out Downlink output port

17 WK_in Supply voltage input port for wake -up

19 Ad Wake-up threshold adjust port

20 Ga_WK Wake-up amplifiers Gain adjust port (optional)

21 Cg External decoupling

22 Fd External decoupling

Ref. : DSCHR2244QDG5053 - 22 Feb 05 5/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 25 slug GND Ground

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 6/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 External Components Propriété de ums SAS. Ne peut être communiqué à des tiers sans autorisation. Property of ums SAS. Distribution to third parties prohibited without consent. semiconductors monolithic united United Monolithic Semiconductors S.A.S. Route Départementale 128 B.P. 46

91401 ORSAY Cedex - France

IMPORTANT NOTICE : All the components placed in the “EVAL BOARD” area are optional. Other components make up the nominal environment where the specifications are guaranteed.

Ref. : DSCHR2244QDG5053 - 22 Feb 05 7/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Design Recommendations n All of the different inputs (TR, Mod) and outputs (SB_out, DATA_out) should be properly isolated (separated enough or with a ground path between them). n As TR port is the most sensitive one, a specific circuit (see on diagram) can be used for high level of isolation. n Device slug should be connected to RF ground plane through multiples vias (>=9). n An external matching may be required to optimize RF performances on 50Ω impedance, versus substrate height. A RF ground plane height of 0.008” (0.203mm) under the component (evaluation board) provides the highest RF performances thanks to low RF ground inductance and low pin to pin coupling. Adjustment abilities: Pin number Pin name Component Description

7 SENS R3

Standby sensitivity adjust port : A value lower than 2.2MΩ decreases Standby chain sensitivity.

12 Ga_SB R4

Standby amplifiers Gain adjust port : A value lower than 680kΩ increases Standby chain sensitivity.

19 Ad R5

Downlink threshold adjust port : A value lower than 6.8MΩ decreases Downlink chain sensitivity.

20 Ga_WK R6

Downlink amplifiers Gain adjust port : A value lower than 220 kΩ increases Downlink chain sensitivity. IMPORTANT NOTICE : All this adjustments may cause non linear response of the performances versus resistors values. The sensitivity is – 1x(Minimum RF power for considered mode).

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 8/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Adjustment abilities characterization: Typical performance, Tamb = +25°C, Vcc = 3.1V n STANDBY sensitivity: The maximum value of R3 resistor is 2.2MΩ . It could be used in order to reduce the Standby sensitivity. The R4 resistor should be used to set the Standby sensitivity higher or lower. The following table gives the typical relation between R3, R4 and the Standby sensitivity. R3 (MW) R4 (kW) Sensitivity (dB) >2.2 indifferently Non guaranteed functionality 2.2 100 S + 1.5 dB 2.2 220 S + 1 dB 2.2 390 S + 0.5 dB 2.2 1200 S - 0.5 dB 2.2 3300 S - 1.5 dB 2.2 6800 S - 3 dB

2.2 No Resistor S - 4 dB

1.5 No Resistor S - 5 dB

(*) S is the sensitivity of a given chip in the recommended environment. In the full operating range and the recommended environment, -|S| < -38 dBm in accordance with the electrical characteristics. n DOWNLINK sensitivity: R5 could be used in order to reduce the Downlink sensitivity or to set the compromise between sensitivity and unwanted data, when no RF signal, due to noise or parasitic coupling. The R6 resistor should be used to set the Downlink sensitivity higher or lower. The following table gives the typical relation between R5, R6 and the Downlink sensitivity. R5 (MW) R6 (kW) Sensitivity (dB) No Resistor 10 S + 2 dB No Resistor 47 S + 1.5 dB No Resistor 220 S + 1 dB No Resistor No Resistor S + 0.5 dB 6.8 (*) No Resistor (*) S (*) (1)

4.7 No Resistor S - 1 dB

3.3 No Resistor S - 2 dB

2.2 No Resistor S - 3 dB

1.5 No Resistor S - 4 dB

1 No Resistor S - 5 dB

(*) S is the sensitivity of a given chip in the recommended environment. In the full operating range and the recommended environment, -|S| < -38 dBm in accordance with the electrical characteristics. (1) A higher sensitivity than in recommended configuration may cause significant density of unwanted data when RF is not modulated. These data are random because of the component noise floor proximity, or can be sensitive to an environment perturbation.

Ref. : DSCHR2244QDG5053 - 22 Feb 05 9/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Frequency response characterization: Typical performance, Tamb = +25°C, Vcc = 3.1V, Recommended environment. n STANDBY sensitivity versus AM frequency : -12 -10,5 -7,5 -4,5 -1,5 10 100 1000 10000 AM Frequency (kHz) Sensitivity (dBrel) n DOWNLINK sensitivity versus AM frequency : -12 -10,5 -7,5 -4,5 -1,5 10 100 1000 10000 AM Frequency (kHz) Sensitivity (dBrel)

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 10/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 Evaluation board Important notice / design recommendations: Device slug should be connected to RF ground plane through multiples vias (>=9). An external matching may be required to optimize RF performances on 50Ω impedance, versus substrate height. A RF ground plane height of 0.008” (0.203mm) under the component (evaluation board) provides the highest RF performances thanks to low RF ground inductance and low pin to pin coupling. Propriété de ums SAS. Ne peut être communiqué à des tiers sans autorisation. Property of ums SAS. Distribution to third parties prohibited without consent. semiconductors monolithic united United Monolithic Semiconductors S.A.S. Route Départementale 128 B.P. 46 Substrate = FR4 Metallic layers qty = 3 Thickness = 0.6mm + 0.2mm

Ref. : DSCHR2244QDG5053 - 22 Feb 05 11/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09

Application Information

General Transmission system The transmission system is described as follows, the tag doesn’t generate any frequency : Fo F-AM TRANSMIT MODE RECEIVE MODE RECEIVE MODE TRANSMIT MODEFo Fm Fo BEACON TAG DOWNLINK figure 1a UPLINK figure 1b BEACON TAG Figure 1 : Transmission system operating principle Two modes of communication are implemented : From beacon to tag (figure 1a) : the beacon is in transmit mode while the tag is in the receive mode. The beacon sends an Amplitude Modulated (AM) RF signal to the tag. In figure 1a, F-AM is the amplitude modulation frequency and F0 is the carrier. From tag to beacon (figure 1b) : the beacon is in receive mode while the tag is in transmit mode. The beacon sends a continuous wave (CW) RF signal to the tag, this signal is then mixed ( at tag level ) with the MOD input signal (Fm) thanks to a reflective mixer. The reflected signal is sent back to the beacon and is demodulated thanks to an homodyne receiver.

Ref. : DSCHR2244QDG5053 - 22 Feb 05 13/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 2 - When the WK_in is set to Vcc (TR remaining at 0V), the CHR2244 switches to the DOWNLINK MODE (figure 3a), allowing an optimized bandwidth for the demodulation. The received data is demodulated and accessible at the DATA_out output. Vcc Det T/R MOD WK_in Vcc DATA_out to controller RF in AM modulated SB_out Data from controller TR WKIN DATA_out RF-in AM modulated Figure 3a : Downlink mode The received AM modulated RF spectrum is as in standby mode. IF 500kHz RF 5,8GHz MODULATOR ATTENUATOR CHR2244 +V +WKIN OSCILLOSCOPE DATA_OUT SB_OUT Figure 3b : Downlink test bench diagram

Ref. : DSCHR2244QDG5053 - 22 Feb 05 15/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 4 - I/O configuration summary T/R WK_in RF_in SB_out DATA_out MOD Standby 0V or High impedance 0V or High impedance AM signal >Vcc-1V CW or no signal <1V Downlink 0V Vcc CMOS Uplink Vcc Vcc Input : CW Output : Fm around the carrier Modulation signal (Fm) AM : Amplitude Modulated CW : Continuous Wave

CHR2244 5.8 GHz One Antenna Reflective Tag Ref. : DSCHR2244QDG5053 - 22 Feb 05 16/16 Specifications subject to change without notice Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09

Ordering Information

Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors S.A.S. assumes no r esponsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S. . Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. United Monolithic Semiconductors S.A.S. products are not auth orized for use as critical components in life support devices or systems without express written approval from United Monolithic Semiconductors S.A.S.