A7121
Preliminary
Typical Applications
Wireless digital audio
Wireless Mouse and Keyboard
2.4GHz ISM Band Communication System
2.4GHz GFSK Transceiver
Wireless game pad
Wireless toy
General Description
A7121 is a monolithic CMOS integrated circuit for wireless
applications in 2.4GHz ISM band. The device is provided
in a 32-lead plastic QFN5X5 packaging and is designed as
a complete GFSK transceiver up to 3Mbps data rate. The
chip features a fully programmable frequency synthesizer
with integrated VCO circuitry.
Features
2400MHz~2484MHz worldwide license free frequency band
Up to 79 selectable channels
2.2 V 鈥?2.8 V voltage supply
Programmable output power up to 0dBm
Channel switching time < 200us
1 or 3Mbps high speed data rate
-20 潞C to 85 潞C operating temperature
-87dBm sensitivity
Direct / FIFO mode operation
Modem interface for low speed, low cost microcontroller
Low IF architecture with few external components
Pin Configurations
SP I _ TXD
SP I _RXD
26
SP I _ CS
BP _ LP F
SP I _ CLK
BP _ DS
VDD _ D
25
32
RSS I
31
30
29
28
27
BP _ L I M 2
BP _ L I M1
BP _ BPF
V DD _ A
RF I
RFO
V DD _ VCO
BP _ VCO
1
2
3
4
5
6
7
24
23
22
RX _ C L K
RX _ SYN
CD _ TXEN
TRXD
TXD
F _ CL K
REST EN
MS0
A7121
10
11
12
13
14
15
BB _CL K
16
21
20
19
18
17
8
9
VDD _ P L L
QFN Package Top View
PRELIMINARY
(Mar. 2005, Version 0.6)
F P _ RDY
MS 1
CPO
XS
VT
XI
1
AMIC Technology, Corp.
1
2
