Download

PDF Abstract Text:

AMIS-50051: Digital Demodulator

2.0 Key Features

AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
1.0 Introduction
The AMIS-50051 is a small digital demodulator, specially developed to work with the AMIS-50050 spread spectrum baseband controller. It simplifies the design of the receiver in a direct sequence spread spectrum wireless communication link.
2.0 Key Features
· · · · · 1Mbit / s demodulation (QPSK) PN code tracking output to AMIS-50050 (Please refer to the AMIS-50050 spread spectrum baseband controller.) Fully programmable CMOS technology Power-down mode
3.0 Applications
· · · · Wireless local area networks Portable wireless communication Digital cellular telephones Wireless ISDN modems
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
4.0 AMIS-50051 Block Diagram
Figure 1: Block Diagram of AMIS-50051
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
5.0 Package Availability
· 24 pin SOIC · 32 pin TQFP
Figure 2: Package Availability
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
6.0 Electrical Specifications
6.1 Absolute Maximum Ratings
Table 2: Absolute Maximum Ratings Parameter VDD / AVDD Input pin voltage, all pins Input pin current, all pins Storage temperature Lead temperature
Min. -0.3 -0.3 -10 -55
Max. 5.5 VDD+0.3 10 125 300
Units V V mA
C for 10 seconds
Note: Stresses beyond those listed under "Absolute Maximum Ratings" may cause damage to the device. This is a stress rating only and functional operation of the device at these, or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
6.2 Operational Characteristics
Table 3: Operational Characteristics Symbol Parameter VDD ICC ICC IFI IFE RXiv RXii Fref Rsol Srte
Notes: (1) (2) (3)
Min. 3
Typ. 18 8
Max. 5
Units V mA mA MHz MHz mVpp k MHz
Supply voltage Supply current (5V) Supply current (3V) IF frequency IF frequency Input voltage Input impedance
Reference frequency RSSI 1&2 output level Internal sample rate
Using the internal A to D converter Using an external A to D converter Impedance for only the RXin pin
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
6.3 Supply Current for 5V Operation
Figure 3: Supply Current for 5V Operation
Note: The frequency in MHz is the frequency of the internal clock, Fvco.
6.4 Supply Current for 3V Operation
Figure 4: Supply Current for 3V Operation
Note: The frequency in MHz is the frequency of the internal clock, Fvco.
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
6.5 AMIS-50051 Programming Interface The AMIS-50051 uses a 3-wire interface, enable / clock and data. The enable is active low.
Figure 5: Active Enable Mode Timing
Table 4: Active Enable Timing Specifications Parameter Typical Slow Mode Typical Fast Mode tLE tH tSU tPULSE tLEH 16 12 4 8 8 0.500 0.125 0.125 0.250 0.250
Units µsec µsec µsec µsec µsec
Note: The AMIS-50051 uses the three wire serial interface for programming. The protocol used is the "Active Enable" mode with a slow clock and enable active low.
6.6 Typical AMIS-50050 to AMIS-50051 Code It is recommended to program the AMIS-50051 via the AMIS-50050. AMIS applications notes to support customer programming are available.
AMI Semiconductor - Sept. 06 www.amis.com
AMIS-50051: Digital Demodulator
Wireless Products
Data Sheet
7.0 AMIS-50051 Ordering Codes
Table 5: Ordering Codes Device Number 11564-502-XTP (or -XTD) 11564-503-XTP (or -XTD) 11564-504-XTP (or -XTD)
Package 24 Lead SOIC 32 Lead LQFP 32 Lead LQFP (green / RoHS)
Note: XTP - tape and reel. XTD - tube / tray
8.0 Company or Product Inquiries
For more information about AMI Semiconductor, our technology and our product, visit our Web site at: http://www.amis.com. North America Tel: +1.208.233.4690 Fax: +1.208.234.6795 Europe Tel: +32 (0) 55.33.22.11 Fax: +32 (0) 55.31.81.12
AMI Semiconductor - Sept. 06 www.amis.com