EVB7122 Melexis Company, EVB7122 Datasheet

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EVB7122

Manufacturer Part Number
EVB7122
Description
Evaluation Board For Th7122 And Th71221
Manufacturer
Melexis Company
Datasheet
Features
Ordering Information
Part No.
EVB7122-315-FSK-C
EVB7122-433-FSK-C
* EVB7122-XXX-YYY-C with XXX = Reception frequency (315, 433.92, 868.3 or 915MHz) and YYY = Modulation (FSK or ASK).
** EVB default population is FSK, ASK modifications according to paragraph 4.2 and 4.3.
*** The evaluation board is supplied with a SMA connector.
Application Examples
General Description
The TH7122 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multi-
channel programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used
for applications in automotive, industrial-scientific-medical (ISM), short range devices (SRD) or similar
applications operating in the frequency range of 300 MHz to 930 MHz. In programmable user mode, the
transceiver can operate down to 27 MHz by employing an external VCO varactor diode.
39012 07122 02
Rev. 006
Single chip solution with only a few external
components
Stand-alone fixed-frequency user mode
Programmable multi-channel user mode
Low current consumption in active mode and
very low standby current
PLL-stabilized RF VCO (LO) with internal
varactor diode
Lock detect output in programmable
user mode
On-chip AFC for extended input frequency
acceptance range
FSK for digital data or FM for analog signal
reception
General bi-directional half duplex digital data
RF signaling or analog signal communication
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry systems
Alarm and security systems
Wireless access control
Garage door openers
Remote controls
Networking solutions
Active RFID tags
Home and building automation
Page 1 of 24
FSK/ASK mode selection
RSSI output for signal strength indication and
ASK reception
ASK detection normal or with peak detector
Switchable LNA gain for improved dynamic
range
Automatic PA turn-on after PLL lock
ASK modulation achieved by PA on/off keying
3wire bus serial control interface
EVB comes with a cable to connect to a PC’s
LPT port
EVB programming software is available on
Melexis web site
Evaluation Board Example
Evaluation Board Description
EVB7122-868-FSK-C
EVB7122-915-FSK-C
27 to 930MHz Transceiver
EVB7122
EVB Description
June/08

Related parts for EVB7122

EVB7122 Summary of contents

Page 1

... Ordering Information Part No. EVB7122-315-FSK-C EVB7122-433-FSK-C * EVB7122-XXX-YYY-C with XXX = Reception frequency (315, 433.92, 868.3 or 915MHz) and YYY = Modulation (FSK or ASK). ** EVB default population is FSK, ASK modifications according to paragraph 4.2 and 4.3. *** The evaluation board is supplied with a SMA connector. Application Examples General bi-directional half duplex digital data ...

Page 2

... Board Component Values for ASK (peak detector option)........................................................ 20 4.3.2 Component Arrangement Top Side for ASK Reception (peak detector option)........................ 21 5 Evaluation Board Layouts .......................................................................................22 6 Package Description ................................................................................................23 6.1 Soldering Information ..................................................................................................... 23 7 Disclaimer .................................................................................................................24 39012 07122 02 Rev. 006 27 to 930MHz Transceiver Evaluation Board Description Page EVB7122 EVB Description June/08 ...

Page 3

... ASK Input frequency acceptance: ± ± 150 kHz (depending on FSK deviation) FM/FSK deviation range: ±2.5 to ±80 kHz Analog modulation frequency: max. 10 kHz Crystal reference frequency: 3 MHz to 12 MHz External reference frequency: 1 MHz to 16 MHz Page EVB7122 EVB Description June/08 ...

Page 4

... Evaluation Board Description FSK 1.5pF IFA R counter RO RO VCC_PLL LF VEE_PLL Fig. 1: TH7122 block diagram Page EVB7122 27 to 930MHz Transceiver 3 IN_DEM 6 OUT_DEM PKDET SW1 bias OA2 INT2/PDO Demodulator MIX SW2 OA1 OUT_DTA 200k Control Logic SCI FSK ...

Page 5

... MHz 868.30 MHz 433.92 MHz 868.30 MHz 10.7 MHz 10.7 MHz Standby Receive Page EVB7122 27 to 930MHz Transceiver 315 MHz 915 MHz 7.1505 MHz 18 32 397.25 kHz 223.45 kHz 766 4047 304.30 MHz 904 ...

Page 6

... Evaluation Board Description ASK 0 high 24-BIT ‘ ’ 01 ‘ ’ ‘ ’ 11 ‘ ’ Fig. 2: SCI Block Diagram Page EVB7122 27 to 930MHz Transceiver FSK 1 low LATCH A-word LATCH B-word 22 C-word C - LATCH 22 D-word D - LATCH EVB Description June/08 ...

Page 7

... TH7122. 39012 07122 02 Rev. 006 Evaluation Board Description bit 22 bit CWL CWH CH Fig. 3: Serial Data Input Timing Page EVB7122 27 to 930MHz Transceiver Invalid LSB data bit EVB Description June/08 ...

Page 8

... Depends on FS0/FS1 voltage level after power Depends on FS0/FS1 voltage level after power up BAND VCOCUR 16d 0 01 32d 1 11 32d 0 00 18d Page EVB7122 27 to 930MHz Transceiver LSB ...

Page 9

... FSK, ‘1’ for mark at ASK or f min inverse ‘1’ for space at ASK FSK, ‘0’ for mark at ASK or f min Active blocks in IDLE mode only RO active whole PLL active Page EVB7122 27 to 930MHz Transceiver #default #default #default #default #default #default #default #default ...

Page 10

... RSSI Peak Detector disabled The RSSI output signal directly feeds the data slicer setup by means of OA1. enabled In ASK receive mode the RSSI Peak Detector output is multiplexed to pin INT2/PDO. Page EVB7122 27 to 930MHz Transceiver = 1.56V 1.22V) 1→0 EVB Description #default ...

Page 11

... LNA gain control LNA gain will be set via pin GAIN_LNA. internal LNA gain control LNA gain will be set via bit LNAGAIN (bit 12 in A-word). Nevertheless pin GAIN_LNA must be connected to either VCC or VEE. Page EVB7122 27 to 930MHz Transceiver pos neg #default EVB Description ...

Page 12

... Set mode of modulation control: external modulation control Modulation will be set via pin ASK/FSK. internal modulation control Modulation will be set via bit MODSEL (bit 19 in A-word). Nevertheless pin ASK/FSK must be connected to either VCC or VEE. Page EVB7122 27 to 930MHz Transceiver #default EVB Description June/08 ...

Page 13

... FS1/LD 20 VCC_PLL L0 TH7122 21 TNK_LO RF 22 VEE_PLL 23 LF RPS 24 CPS CTX4 C2 CTX0 LTX0 CRX0 LRX2 CTX1 L1 LTX1 CTX2 TX_OUT RX_IN 50 Page EVB7122 27 to 930MHz Transceiver CX1 XTAL LX OUT_DTA RSSI OUT_DEM INT1 5 INT2/PDO IN_DEM CB5 2 VCC_IF IN_IFA 1 ...

Page 14

... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB CDSCB10M7GA136 Page EVB7122 27 to 930MHz Transceiver Tol. Description ±5% VCO tank capacitor ±5% LNA output tank capacitor ±5% MIX input matching capacitor ±10% data slicer capacitor demodulator output low-pass ± ...

Page 15

... CB6 CB6 CB5 CB5 RPS RPS CPS CPS C2 C2 CTX4 CTX4 C1 C1 LTX0 LTX0 L1 L1 CB1 CB1 CTX1 CTX1 RB1 RB1 LRX2 LRX2 CTX2 CTX2 Board size is 39.5mm x 56.5mm Page EVB7122 27 to 930MHz Transceiver CERDIS RP EVB Description June/08 ...

Page 16

... LTX0 CRX0 LRX2 CTX1 LTX1 CTX2 TX_OUT RX_IN 8.0000MHz 3043 8 315 4233 8 434 9043 8 915 Page EVB7122 27 to 930MHz Transceiver CX1 XTAL OUT_DTA 8 C5 RSSI 7 6 OUT_DEM C3 5 INT1 INT2/PDO 4 3 IN_DEM CB5 2 VCC_IF IN_IFA ...

Page 17

... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB Page EVB7122 27 to 930MHz Transceiver Description VCO tank capacitor LNA output tank capacitor MIX input matching capacitor data slicer capacitor RSSI output low pass capacitor de-coupling capacitor de-coupling capacitor ...

Page 18

... Component Arrangement Top Side for ASK Reception (normal data slicer option) CB0 RF 39012 07122 02 Rev. 006 Evaluation Board Description CB6 CB5 RPS CPS C2 CTX4 C1 LTX0 L1 CB1 CTX1 RB1 LRX2 CTX2 Board size is 39.5mm x 56.5mm Page EVB7122 27 to 930MHz Transceiver C5 C3 EVB Description June/08 ...

Page 19

... CB2 LTX0 CRX0 LRX2 CTX1 LTX1 CTX2 TX_OUT RX_IN 8.0000MHz 3043 8 315 4233 8 434 9043 8 915 Page EVB7122 27 to 930MHz Transceiver CX1 XTAL OUT_DTA RSSI OUT_DEM 6 R2 INT1 5 INT2/PDO IN_DEM C6 CB5 2 VCC_IF IN_IFA ...

Page 20

... MHz ±20ppm cal., ±20ppm temp. SFECF10M7HA00 B = 180 kHz 3dB Page EVB7122 27 to 930MHz Transceiver Description VCO tank capacitor LNA output tank capacitor MIX input matching capacitor RSSI output low pass capacitor PKDET capacitor de-coupling capacitor de-coupling capacitor ...

Page 21

... Component Arrangement Top Side for ASK Reception (peak detector option) CB0 RF 39012 07122 02 Rev. 006 Evaluation Board Description CB6 CB5 RPS CPS C2 CTX4 C1 LTX0 L1 CB1 CTX1 RB1 LRX2 CTX2 Board size is 39.5mm x 56.5mm Page EVB7122 27 to 930MHz Transceiver EVB Description June/08 ...

Page 22

... Evaluation Board Layouts • Board layout data in Gerber format is available, board size is 39.5mm x 56.5mm. PCB top view 39012 07122 02 Rev. 006 27 to 930MHz Transceiver Evaluation Board Description PCB bottom view Page EVB7122 EVB Description June/08 ...

Page 23

... L + 1° LQFP32 (Low profile Quad Flat Package 1.40 0.05 1.35 0.8 1.60 0.15 1.45 0.055 0.002 0.053 0.031 0.063 0.006 0.057 Page EVB7122 27 to 930MHz Transceiver 1° 0.25 (0.0098) .10 (.004) α 0.30 0.09 0.45 0° 0.45 0.20 0.75 7° 0.012 0.0035 0.018 0° 0.018 ...

Page 24

... Europe, Africa: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com 39012 07122 02 Rev. 006 27 to 930MHz Transceiver Evaluation Board Description www.melexis.com Americas: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified Page EVB7122 Asia: Phone: +32 1367 0495 E-mail: sales_asia@melexis.com EVB Description June/08 ...

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