Wide band IF detector for RF remote control units BH4126FV Communication ICs

Wide band IF detector for RF remote control units BH4126FV Communication ICs
BH4126FV
Communication ICs
Wide band IF detector for RF remote
control units
BH4126FV
The BH4126FV is an IC equipped with internal mixer, IF amplifier, and FM detector circuits, developed for use with RF
remote control units.
!Applications
Keyless entry
!Features
1) Equipped with internal mixer, IF, RSSI, and FM
detection circuits.
2) Can be operated at mixer input frequencies ranging
from 20MHz to 300MHz.
3) Equipped with a battery power saving function.
4) Fast RSSI response.
5) High FM detection sensitivity. (21.2mV / kHz)
BH4126FV
Communication ICs
!Block diagram
VCC
IF input
16
RSSI
FM detector
output
IF output
14
15
13
12
11
10
9
VCC
Quadrature
DET.
RSSI
IF
Local OSC.
VCC
1
2
3
4
5
6
7
8
Local
Battery save
VCC
!Absolute maximum ratings (Ta=25°C, for measurement circuit)
Parameter
Power supply voltage
Power dissipation
Storage temperature
Symbol
Limits
Unit
VCC
7.0
V
*1
PD
350
Tstg
-55~+125
mW
˚C
*1 Reduced by 3.5 mW for each increase in Ta of 1˚C over 25˚C.
!Operating range
Parameter
Symbol
Limits
Unit
Operating power supply voltage
VCC
2.3~5.5
V
Operating temperature
Topr
-40~+85
˚C
BH4126FV
Communication ICs
!Pin descriptions
Function
Pin No.
Internal peripheral circuit
DC voltage(V)
Local oscillator pin (base)
VCC
VCC - 0.6
5k
1
Connect crystal resonator
and capacitor
1
Local oscillator pin (emitter)
2
2
To MIXER
Connect capacitor or input local signal
from external oscillator
VCC
Battery save pin
"Pin 3 voltage" ≤ 0.2 : Battery save
30k
3
3
2 V ≤ "Pin 3 voltage" ≤ VCC : Active
-
Mixer output pin
Connect ceramic filter
Output impedance: 330Ω
VCC
270
4
4
GND pin
5
VCC - 1.5
GND for IF stages and FM detection stages
GND
BH4126FV
Communication ICs
Pin No.
Function
Internal peripheral circuit
DC voltage (V)
IF amplifier bypass pin
Connect capacitor
VCC
6
3k
VCC
170
6
IF amplifier input pin
Connect ceramic filter
Input impedance: 330Ω
170
7
7
VCC
VCC pin 1
Vcc for MIX stages and IF front stage
8
VCC
VCC pin 2
Vcc for IF rear stage and FM detection stage
9
VCC
RSSI output pin
VCC
Connect capacitor
10
0.1
15k
10
IF amplifier output pin
Pins 11 and 12 are opposite-phase
output
VCC
11
100
11
12
VCC - 1
BH4126FV
Communication ICs
Pin No.
Function
DC voltage(V)
Internal peripheral circuit
Discriminator pin
VCC
Connect phase shift
coil or ceramic discriminator
500
13
13
VCC
FM demodulation signal output pin
VCC
Output impedance is 360Ω
330
14
0.9
14
GND pin
GND for MIX stage
15
GND
Mixer pin
VCC
Connect first IF signal from DC cutoff
16
2.4k
16
2.4k
1.0
BH4126FV
Communication ICs
!Electrical characteristics (unless otherwise noted, Ta=25°C, VCC=3.0V)
_ Signal source : fIN (MIX) = 248.45MHz, fIN (LO) = 237.75MHz, 100dBµV
_ AC level to be indicated by termination
Parameter
Symbol
Min.
Typ.
Max.
Unit
IQ
4.4
5.5
6.6
mA
IQ (BS)
-
0
5
µA
VTH-H
2
-
VCC
V
Active
VTH-L
GND
-
0.2
V
Battery save
fMIX
20
-
300
MHz
Mixer conversion gain
GVC
16
20
24
dB
-1dB compression output level
VOM
-
103
-
dBµV
3rd order intercept point
IP3
-
110
-
dBµV
Quiescent current
Battery save quiescent current
Battery save function input voltage
Conditions
With local oscillation OFF
〈 MIX - Oscillator section 〉
Mixer operating frequency
VIN (MIX) = 60dBµV
f1=248.75MHz,f2=249.05MHz
NF
-
9.7
-
dB
LC matching input
Mixer input admittance
YIN (MIX)
-
1.25+j7.47
-
ms
f=248.45MHz
Mixer output resistance
RO (MIX)
-
330
-
Ω
fLO
20
-
120
MHz
Local input level
VIN (LO)
95
100
105
dBµV
Local input admittance
YIN (LO)
-
1.36+j9.72
-
ms
Noise figure
Local oscillator operating frequency
f=237.75MHz
BH4126FV
Communication ICs
Signal source : fIN (MIX) = 248.45MHz, fIN (LO) = 237.75MHz,100dBµV, fIN (IF) = 10.7MHz;
AC level to be indicated by termination
Parameter
Symbol
Min.
Typ.
Max.
Unit
fIF
4
-
15
MHz
Conditions
〈 IF section 〉
IF operating frequency
GV
-
75
-
dB
RIN (IF)
-
330
-
Ω
IF output level
VOIF
0.4
0.5
0.6
VP-P
IF duty ratio
DR
40
50
60
%
VIN (IF) = 80dBµV, CL = 10pF
IF amplifier gain
IF input resistance
VIN (IF) = 80dBµV
〈 RSSI section 〉
Output voltage 1
VRSSI1
-
0.15
0.4
V
No input
Output voltage 2
VRSSI2
1.0
1.2
1.4
V
VIN (IF) = 70dBµV
Output voltage 3
VRSSI3
1.8
2.0
2.2
V
VIN (IF) = 100dBµV
DR
-
70
-
dB
RO (RSSI)
12
15
18
kΩ
TON
-
20
-
µs
CL = 100pF, VIN (MIX) = 60dBµV
5
-
µs
CL = 100pF, VIN (MIX) = 60dBµV
Dynamic range
Output resistance
Rise time at power on
TOFF
-
RSSI rise time
TR
-
9
-
µs
CL = 100pF, VIN (MIX) = 60dBµV
RSSI fall time
TF
-
11
-
µs
CL = 100pF, VIN (MIX) = 60dBµV
Unit
Fall time at power off
Signal source : fIN (IF) =10.7MHz, ∆f=±10kHz dev, fm=1kHz;
AC level to be indicated by termination
Parameter
Symbol
Min.
Typ.
Max.
Conditions
SDET
-
21.2
-
Detection output level
VO
110
150
195
mVrms
VIN (IF) = 80dBµV
Detection frequency
fDET
-
100
-
kHz
VIN (IF) = 80dBµV
〈 Detector unit 〉
Detection sensitivity
mV / kHz VIN (IF) = 80dBµV
S (12dB)
12
16
20
dBµV
S / N ratio
S/N
40
48
-
dB
VIN (IF) = 80dBµV
AM rejection ratio
AMR
-
40
-
dB
VIN (IF) = 80dBµV, AM = 30%
12 dB SINAD sensitivity
BH4126FV
Communication ICs
!Measurement circuit
CL=10pF
(Includes the capacity of the measurement system.)
T1: 4162-JPS-024 (SUMIDA)
T1
V6
4.7k
V
~
SG1
fIN=248.45MHz
VIN=60dBµV
V5
V
~
100p
V
~
CL
RIN=100kΩ
CL
30kHz LPF
V6
3p
V
V4
51
1000p
16
15
14
13
12
11
10
9
VCC
Quadrature
DET.
RSSI
IF
Local OSC.
VCC
3
4
SW1
V
6
SW2
2
7
8
0.01
1
SW3
2
1
1
2
1.9V 0.3V
V3
62
SG2
fIN=237.75MHz
VIN=100dBµV
A
I1
SW4
V
~
0.01
V
1000p
V2
3k
10
1
2
VCC
SG3
fIN=10.7MHz
51
V1
5
0.1
2
1000p
1
Units Resistance : Ω
Capacitance : µV
Fig. 1
BH4126FV
Communication ICs
!Application example
Without FM detector.
VCC
IF OUT
Open
14
13
12
T1: 4162-JPS-024 (SUMIDA)
VCC
T1
RSSI
10
FM Detector Out
IF OUT
3p
0.1
100p
fIN=248.45MHz
1000p
16
15
14
13
12
11
10
9
VCC
Quadrature
DET.
RSSI
IF
Local OSC.
VCC
3
2
4
5
6
7
8
2
BS
1000p
1
0.1
0.01
1
fLO=237.75MHz
VIN=100dBµV
Units Resistance : Ω
Capacitance : µF
Fig. 2
BH4126FV
Communication ICs
!External dimensions (Units: mm)
1
8
4.4±0.2
9
0.65
0.15±0.1
1.15±0.1
0.1
6.4±0.3
5.0±0.2
16
0.22±0.1
0.3Min.
0.1
SSOP - B16
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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