SPRF2738A
Low Power FM/FSK IF IC
APR. 30, 2003
Version 1.2
SUNPLUS TECHNOLOGY CO. reserves the right to change this documentation without prior notice. Information provided by SUNPLUS TECHNOLOGY CO.
is believed to be accurate and reliable.
However, SUNPLUS TECHNOLOGY CO. makes no warranty for any errors which may appear in this document.
Contact SUNPLUS TECHNOLOGY CO. to obtain the latest version of device specifications before placing your order. No responsibility is assumed by
SUNPLUS TECHNOLOGY CO. for any infringement of patent or other rights of third parties which may result from its use. In addition, SUNPLUS products
are not authorized for use as critical components in life support devices/ systems or aviation devices/systems, where a malfunction or failure of the product may
reasonably be expected to result in significant injury to the user, without the express written approval of Sunplus.
SPRF2738A
Table of Contents
PAGE
1. GENERAL DESCRIPTION ..........................................................................................................................................................................3
2. FEATURES ..................................................................................................................................................................................................3
3. APPLICATION FIELD ..................................................................................................................................................................................3
4. BLOCK DIAGRAM ......................................................................................................................................................................................3
5. SIGNAL DESCRIPTIONS ............................................................................................................................................................................4
5.1. D
IE FORM
PIN O
UT
................................................................................................................................................................................4
5.2. PIN C
ONFIGURATION
..............................................................................................................................................................................4
5.3. O
RDERING
I
NFORMATION
........................................................................................................................................................................5
6. ELECTRICAL SPECIFICATIONS................................................................................................................................................................6
6.1. A
BSOLUTE
M
AXIMUM
R
ATINGS
................................................................................................................................................................6
6.2. DC/AC C
HARACTERISTICS
.....................................................................................................................................................................6
6.3. T
EST
C
IRCUIT
........................................................................................................................................................................................7
6.4. T
YPICAL
C
HARACTERISTICS
....................................................................................................................................................................7
7. APPPLICATION CIRCUITS .........................................................................................................................................................................8
7.1. 27MH
Z
W
IRELESS
M
OUSE OR
K
EYBOARD
R
ECEIVER
RF M
ODULE
...........................................................................................................8
7.2. 49MH
Z
FM B
ABY
M
ONITOR
R
ECEIVER
...................................................................................................................................................8
8. PACKAGE/PAD LOCATIONS .....................................................................................................................................................................9
8.1. PAD A
SSIGNMENT AND
L
OCATIONS
.........................................................................................................................................................9
8.2. P
ACKAGE
I
NFORMATION
........................................................................................................................................................................10
8.2.1. SOP16 (150mil) .......................................................................................................................................................................10
9. DISCLAIMER ............................................................................................................................................................................................. 11
10. REVISION HISTORY .................................................................................................................................................................................12
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© Sunplus Technology Co., Ltd.
Proprietary & Confidential
2
APR. 30, 2003
Version: 1.2
SPRF2738A
LOW POWER FM/FSK IF IC
1. GENERAL DESCRIPTION
SPRF2738A is a highly integrated IF (Intermediate Frequency) IC
which is popularly used in FM / FSK (Frequency Modulation /
Frequency-Shift Keying) or OOK (On-Off Keying) communication
systems.
It also contains a low noise amplifier, mixer, oscillator, IF limiting
amplifier with RSSI (Received Signal Strength Indicator, metal
slicer.
optioned), quadrature demodulator, amplifier, and digital data
The SPRF2738A is designed for single channel receiver at
It is also applicable for dual conversions
10MHz - 50MHz band.
2. FEATURES
Operation voltage: 2.4V - 5.5V
Low current consumption: 2.5mA @ VDD = 3.0V.
Operating frequency up to 50MHz
Power down function
Single chip FM/FSK or OOK receiver.
communication system.
4. BLOCK DIAGRAM
VDD
LNAI
LNA
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C A
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RSSI function (metal option)
Full ESD protection
-107dBm sensitivity (SNR = 12dB)
3. APPLICATION FIELD
Dual conversion IF
Radio control toy
Voice/data communication.
Wireless keyboard, mouse receiver
MXO
LMI
RSSI
LMO
QUAD
CF
DEMO
OPP
1.8KΩ
1.8KΩ
RSSI
1.9V
OPO
QDEM
OPN
60k
100k
OSC
60k
DOB
VSS
OSCO
OSCI
PD
CN
CP
DO
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
3
APR. 30, 2003
Version: 1.2
SPRF2738A
5. SIGNAL DESCRIPTIONS
5.1. Die form PIN Out
Mnemonic
OSCI
OSCO
MXO
PD
VDD
LMI
CN
CF
QUAD
LMO
DEMO
OPP
OPN
OPO
VSS
CP
DOB
DO
LNAI
PIN No.
1
2
3
4
5
6
Type
I
O
O
I
I
I
Oscillator input
Oscillator output
Mixer output, Ro = 1.8K
Power down, internally pulled high. PD =”H”: power down; PD = ”L”: chip enable.
Positive power supply
Limit amplifier input, Ri = 1.8K
Description
7
8
9
10
11
12
13
14
15
16
17
18
19
5.2. PIN Configuration
OSCI
OSCO
MXO
VDD
LMI
CN
CF
QUAD
SPRF2738A -PS031
OSCI
OSCO
MXO
VDD
LMI
CN
CF
QUAD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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I
Inverting input of comparator
O
I
Discriminator output filtering capacitor
Discriminator input for quadrature demodulator
Limiting amplifier output
O
O
I
FM demodulation output
Non-inverting input of operational amplifier.
Inverting input of operational amplifier
Output of operational amplifier
Internally biased at 1.9V
I
O
I
Ground
I
Non-inverting input of comparator
Inverted data output
O
O
I
Comparator output, data output
Input of low noise amplifier, RF input
1
2
3
4
5
6
16
LNAI
VSS
DO
CP
OSCI
MXO
1
2
3
4
5
6
16
LNAI
VSS
NC
CP
DOB
15
14
13
12
11
10
9
OSCO
VDD
15
14
13
12
11
10
9
DOB
LMI
CN
CF
OPO
OPN
OPO
OPN
7
8
7
8
DEMO
QUAD
DEMO
SPRF2738A -PS032
LNAI
VSS
DO
RSSI
CP
OPO
OPN
DEMO
SPRF2738A
-002C-PS031
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
4
APR. 30, 2003
Version: 1.2
SPRF2738A
5.3. Ordering Information
Product Number
SPRF2738A - C
SPRF2738A - PS031
SPRF2738A - PS032
SPRF2738A - 002C - C
SPRF2738A - 002C - PS031
Note:
The differences between the above two parts are listed as below.
Package Type
Chip form
Package form - SOP16
Package form - SOP16
Chip form
Package form - SOP16
Product Number
SPRF2738A - C
SPRF2738A - PS031
SPRF2738A - PS032
SPRF2738A - 002C - C
SPRF2738A - 002C - PS031
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Sensitivity @3.0V (dBm)
Input IP3 (dBm)
DOB pad option
RSSI pad option
-110
-51
Yes
No
No
-106
-38
Yes
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
5
APR. 30, 2003
Version: 1.2
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