A7121 A7121 - amic technology
A7121 A7121 - amic technology
A7121 A7121 - amic technology
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<strong>A7121</strong><br />
Preliminary 2.4GHz GFSK Transceiver<br />
Typical Applications<br />
� Wireless digital audio<br />
� Wireless Mouse and Keyboard<br />
� 2.4GHz ISM Band Communication System<br />
General Description<br />
<strong>A7121</strong> is a monolithic CMOS integrated circuit for wireless<br />
applications in 2.4GHz ISM band. The device is provided<br />
in a 32-lead plastic QFN5X5 packaging and is designed as<br />
Features<br />
� 2400MHz~2484MHz worldwide license free frequency band<br />
� Up to 79 selectable channels<br />
� 2.2 V – 2.8 V voltage supply<br />
� Programmable output power up to 0dBm<br />
� Channel switching time < 200us<br />
� 1 or 3Mbps high speed data rate<br />
� -20 ºC to 85 ºC operating temperature<br />
� -87dBm sensitivity<br />
� Direct / FIFO mode operation<br />
� Modem interface for low speed, low cost microcontroller<br />
� Low IF architecture with few external components<br />
Pin Configurations<br />
BP_ L IM2<br />
BP_ L IM1<br />
BP_BPF<br />
VDD_A RF I<br />
RFO<br />
VDD_VCO BP_VCO<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
RSS I<br />
32<br />
9<br />
VT<br />
BP_DS<br />
31<br />
10<br />
CPO<br />
BP _LPF<br />
30<br />
11<br />
29<br />
12<br />
28<br />
13<br />
27<br />
<strong>A7121</strong><br />
VDD_PLL<br />
SP I _CS<br />
XI<br />
SP I _CLK<br />
XS<br />
14<br />
Y<br />
D<br />
R<br />
� Wireless game pad<br />
� Wireless toy<br />
a complete GFSK transceiver up to 3Mbps data rate. The<br />
chip features a fully programmable frequency synthesizer<br />
with integrated VCO circuitry.<br />
PRELIMINARY (Mar. 2005, Version 0.6) 1 AMIC Technology, Corp.<br />
SPI _TXD<br />
_<br />
P<br />
F<br />
SP I _RXD<br />
26<br />
15<br />
BB _CLK<br />
VDD_D<br />
24<br />
16 25<br />
MS 1<br />
23<br />
22<br />
21<br />
20<br />
19<br />
18<br />
17<br />
QFN Package Top View<br />
RX_CLK<br />
RX_SYN<br />
CD_ TXEN<br />
TRXD<br />
TXD<br />
F_CLK<br />
RESTEN<br />
MS0
Application Circuit<br />
Important Notice:<br />
<strong>A7121</strong><br />
AMIC reserves the right to make changes to its products or to discontinue any integrated circuit product or service without<br />
notice. AMIC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in lifesupport<br />
applications, devices or systems or other critical applications. Use of AMIC products in such applications is understood<br />
to be fully at the risk of the customer.<br />
PRELIMINARY (Mar. 2005, Version 0.6) 2 AMIC Technology, Corp.
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