A7101
Preliminary
Document Title
2.4GHz FSK Transceiver
Revision History
Rev. No.
0.0
0.1
2.4GHz FSK Transceiver
History
Initial issue
Modify current consumption, Tx output power, sensitivity,
RSSI range, frequency deviation, data rate, SPI interface,
and pin description.
Issue Date
August 2, 2002
October 16, 2002
Remark
Preliminary
Preliminary
0.2
0.3
0.4
Modify X’TAL Settling Time, Tx output power (Hi power)
Application Circuit, and delete X’TAL accuracy
Modify Tx output power (Hi power)
Modify data rate and calibration mode
June 9, 2003
Dec. 30 2003
March 10, 2004
Preliminary
Preliminary
Preliminary
Important Notice:
AMIC reserves the right to make changes to its products or to discontinue any integrated circuit product or
service without notice. AMIC integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life-support applications, devices or systems or other critical applications. Use of AMIC
products in such applications is understood to be fully at the risk of the customer.
PRELIMINARY
(March 2004, Version 0.4)
AMIC Technology, Corp.
A7101
Preliminary
Typical Applications
Wireless Mouse and Keyboard
2.4GHz ISM Band Communication System
Two way wireless Transceiver
Wireless toy
Wireless Modem
2.4GHz FSK Transceiver
General Description
The A7101 is a monolithic CMOS integrated circuit
intended for use as a low cost FSK transceiver in wireless
applications. The device is provided in 48-lead plastic
QFN7X7 packaging and is designed to function as a
complete FSK transceiver. It is intended for wireless
applications in the 2.4GHz to 2.5GHz ISM band. This chip
features a fully programmable frequency synthesizer with
integrated VCO circuitry.
Pin Configurations
CAP2_AFC
CAP1_AFC
CAP3_AFC
LPFOUT
EN_AFC
CMPVIP
LPFINN
LPFINP
TANK1
TANK2
48
47
46
45
44
43
42
41
38
37
40
39
MUTE
RSSI
VDD_A
RXDATA
BR_RX
NC
RFIO
BP_BUF
TXDATAIN
XTAL1
XTAL2
XTALOUT
CAPSW
BP_REG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
LIM2INN
LIM2INP
LIM1OUT
LIM1INN
LIM1INP
MIXOUT
VDD_VCO
BP_VCO
VT
BR_VCO
CHPOUT
LD
A7101
31
30
29
28
27
26
25
VDD_D
SPI_CLOCK
EN_REG
LVOUT
SPI_LATCH
MODSEL0
Figure 1. QFN Package Top View
SPI_DATA
MODSEL1
VUOT
LVIN
REGFB
VIN
PRELIMINARY
(March 2004, Version 0.4)
1
AMIC Technology, Corp.
A7101
Block Diagram
34
LIM1OUT
35
LIM2INP
36
LIM2INN
MUTE
37
RSSI
38
39
TANK2
40
LPFINP
TANK1
41
LPFINN
42
43
LPFOUT
48
CMPVIP
2
RXDATA
33
32
31
LIM1INN
LIM1INP
DEMOD
Data Slicer
LPF
Integrator
EN_AFC
Limiter1
MIXOUT
Limiter2
47
46
45
44
29
28
LNA
CAP2_AFC
CAP1_AFC
5
RFIO
PA
CAP3_AFC
VCO
7
11
8
TXDATAIN
CAPSW
BP_VCO
FSK
Modulation
Circuit
Buffer
VT
XTAL1
÷
32
OSC
33
Bias
BR_VCO
27
CHPOUT
9
XTAL2
Counter
Phase Detector
Charge Pump
26
25
LD
10
XTALOUT
21
REGFB
Voltage Regulator &
Low voltage detector
SPI_DATA
EN_REG
BP_REG
SPI
SPI_CLOCK
SPI_LATCH
Mode
Selection
MODSEL0
MODSEL1
LVOUT
VOUT
LVIN
12
13
14
16
22
VIN
23
17
18
19
20
24
Figure 2. System Block Diagram
PRELIMINARY
(March 2004, Version 0.4)
2
AMIC Technology, Corp.
A7101
Specification
Parameter
General
Storage Temperature
Operating Temperature
Supply Voltage
Current Consumption
Transceiver Circuit
Active (RX Mode)
Active (TX Mode @high power)
Active (TX Mode @low power)
Stand By Mode
Sleep Mode
Active @VIN = 3.3V
Stand By
Description
Min.
-20
0
2.2
2.5
30
17
14
1.5
5
150
5
Typ.
Max.
70
50
5
Unit
°C
°C
V
mA
mA
mA
mA
µA
µA
µA
Current Consumption
Embedded Regulator
Phase Locked Loop
Reference Frequency
X’TAL Settling Time
Operation Frequency
Number of Channels
PLL Settling Time
RF Front End (TX mode)
TX Power
RF Output Impedance
RF Front End (RX mode)
RF Input Impedance
Sensitivity
Cascaded IIP3 TBM
IF Section
Intermediate Frequency
RSSI Range
Modulation / Demodulation
Scheme
Data rate
Frequency Deviation
Regulator
Supply voltage
Output voltage
Drop out voltage
Load current
Battery-Low indicator reference
@12MHz, cap. Load = 20pF
@ 2MHz spacing
@Loop bandwidth = 100KHz
High Power
Low Power
@2.45GHz
@2.45GHz
@BER=0.001
4,6,8,10,12,14,16
5
2416~2478
32
150
-6
-16
50
50
-80
-30
10.7
MHz
ms
MHz
µs
dBm
dBm
Ohm
Ohm
dBm
dBm
MHz
dBm
@RF input
FSK
@ Crystal modulation
@ VCO modulation
@ Crystal modulation
@ VCO modulation
-90
-50
64
100
50
150
5
2.5
0.2
50
1.2
Kbps
Kbps
KHz
KHz
V
V
V
mA
V
Table 1.
PRELIMINARY
(March 2004, Version 0.4)
3
AMIC Technology, Corp.
A7101
RF - Baseband Interface
Pin Number
23
Pin Name
VIN
GND
7
2
17
18
19
20
24
25
22
13
37
47
TXDATAIN
RXDATA
SPI_DATA
SPI_CLOCK
SPI_LATCH
MODSEL0
MODSEL1
LD
EN_REG
LVOUT
MUTE
EN_AFC
Supply voltage.
Ground.
Transmitter data input.
Receiver data output.
Data for SPI interface.
Clock for SPI interface.
Latch for SPI interface.
Chip operation mode selection (LSB).
Chip operation mode selection (MSB).
PLL locked detect Indicator output.
Voltage regulator enable pin.
Battery-low indicator output.
Receiver mute control output pin.
AFC circuit control pin.
Table 2.
Option.
Option.
Option.
Option.
Option.
Option.
Option.
Please see Pin Descriptions
section for detail.
Description
Note
PRELIMINARY
(March 2004, Version 0.4)
4
AMIC Technology, Corp.
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