BT1074Bi
850-950MHz RF TRANSCEIVER
SINGLE CHIP 850-950MHz RF TRANSCEIVER
Features
•
•
•
•
•
•
•
•
Complete single chip RF transceiver
Two on-chip local oscillators
I/Q or FM* input interface
Single power supply 2.7 - 3.6 V
Low power consumption BiCMOS technology
On-chip LNA and RF Mixer
RF Power selectivity (-4dBm or +17dBm)
Wide operating temp range (-40
o
C to +85
o
C)
MIXERINP
GNDRX_BUF
52
MIXOUTP
51
MIXOUTN
50
VDDRX_BUF
54
53
RMX_OUTN
GND_IF
55
VCO2_IN
GND_DMX2
GND_DMX1
RMX_OUTP
VDDLNA2
VDDLNA1
VDD_DMX
VDD_IF
59
64
58
61
62
60
57
63
56
GNDLNA1N
1
RF_INN
GNDLNA
RF_INP
2
3
4
5
49
RX_EN
48
47
46
45
44
43
RF_VCO_EN
VDDRFVCOIN
RFVCOCAPIN
RF_VCO_CTRL
GNDRFVCOIN
RF_VCO_OUT
GNDRF_VCO
VDDRF_VCO
VDDIF_VCO
GNDIF_VCO
TRFIC
GNDLNA1P
VDDPA_GR
6
GND_PA1
RF_OUTN
7
8
Applications
•
•
•
•
•
•
902-928 MHz ISM Band
868-870MHz Band (Europe)
Direct Sequence Spread Spectrum (DSS)
Frequency Hopping Spread Spectrum
Wireless LAN
Wireless Communication Products
BTI
42
41
40
39
38
R
GND_PA2
9
RF_OUTP
10
GND_PA3
11
REXT2
GND_PRE1
REXT1
GND_PRE2
12
13
14
15
BT1074Bi
RFICs for 850 - 2400MHz
IF_VCO_OUT
GNDIFBUF
36
IFCAPIN
37
34
LEXTN
16
VDD_IFVCOIN
32
TXI
28
M_REF
29
GND_TXIF1
26
VDD_UPC
21
GND_UPC1
22
GND_UPC2
23
GND_TXIF2
27
LEXTP
17
GND_PRE3
18
VDD_PRE2
20
VDD_PRE1
19
TX_P_CNT
TX_EN
25
TXQ
30
VDD_TXIF
31
24
IF_VCO_CTRL
GND_IFVCOIN
33
IF_VCO_GND
35
Description
The BT1074Bi is a BiCMOS monolithic integrated RF transceiver. In addition to the input I/Q interface, the
IC contains all of the required components to implement a complete RF-IF transceiver. This includes two
on-chip local oscillators, a low noise amplifier with an overall noise figure of less than 5dB over tempera-
ture and power supply variations, two highly linear down-conversion mixers, an IF amplifier, an upconver-
sion mixer and an on-chip power amplifier capable of delivering -4dBm to +17dBm. The unit operates with
a power supply voltage range of 2.7 - 3.6 volts.
*
See Single-ended RFM input application example on page 15.
Ordering Information
BT1074Bi 850-950MHz RF Transceiver
BTI, 13825 Cerritos Corporate Dr., Cerritos CA. 90703, U.S.A.
Tel (562) 407-0500 Fax (562) 407-0510 sales@betheltronix.com
www.betheltronix.com
May 29, 2001
Confidential and Proprietary Information of BTI
Page 1
BT1074Bi
Specifications
Parameters
Overall
Power supply
Operating Frequency ranges
Receiver
Gain
Noise Figure
Input IP3
Current consumption (w/ RF VCO)
Transmitter
Gain
TX current consumption @
High power mode (with RF & IF VCOs)
*with RF PA @ +15 dBm output
IFVCO current consumption
RFVCO current consumption
Receiver Section
LNA + RF Downconversion Mixer
Gain
Input IP3
Input 1dB compression point
Noise figure (LNA only)
S11
Input impedance
1
Output Impedance
Image Rejection (at typical center freq.):
915MHz
881.49MHz
IF Downconversion Mixer & IF Amp
Gain
Input IP3
Input 1dB compression point
Noise figure
Input Impedance
Output Impedance
Transmitter Section
I&Q Modulator & Filter
Input impedance
I/Q input frequency
I/Q input swing
I/Q input DC level
M_REF DC level
-
-
-
-
-
16
-13
-22
2.4
-44
-
-
27
26
12
-10
-20
-
-
-
Min.
2.7
890
860
28
3.6
-11
-
-
-
-
-
850-950MHz RF TRANSCEIVER
Typ.
3.0
915
35
4
-12
60
17
89*
27
32
Max.
3.6
940
875
44
5
-13
-
-
-
-
-
Units
V
MHz
MHz
dB
dB
dBm
mA
dB
mA
mA
mA
R
RFICs for 850 - 2400MHz
20
-12
-21
2.8
-
50
300
29
28
15
-10
-20
-
300
330
22
-11
-20
3.3
-22
-
-
31
30
20
-9
-19
-
-
-
dB
dBm
dBm
dB
dB
Ω
Ω
dB
dB
dB
dBm
dBm
Ω
Ω
TRFIC
>20
<4
0.5
VDD/2
VDD/2
-
-
-
-
-
kΩ
MHz
Vp-p
V
V
May 29, 2001
Confidential and Proprietary Information of BTI
Page 2
850-950MHz RF TRANSCEIVER
Parameters
RF Upconversion Mixer
Conversion gain (internal)
Input IP3
Input 1dB compression point
Power Amplifier*
Output power into 50Ω load, high power
mode (TX_P_CNT=0V)
Output power into 50Ω load, low power
mode (TX_P_CNT=VDD)
Voltage Gain (internal)
Output impedance (after combiner)
Output 1dB compression point
Output spurious suppression
RF VCO Section*
Frequency range (at output to PLL)
VCO phase noise at 100KHz offset
(closed-loop)
VCO phase noise at 1MHz offset
VCO output level (50Ω)
IF VCO Section*
Frequency range (at output to PLL)
VCO phase noise at 100KHz offset
(closed-loop)
VCO phase noise at 1MHz offset
VCO output level
205
-
-
-14
220
-112
-120
-8
235
-
-
-2
780
-
-
-14
805
-100
-118
-12
830
-
-
-6
Min.
-
-
-
+13
-
-
-
-
-
Typ.
0
-10
-20
+15
-4
25
50
7
-40
Max.
-
-
-
+17
-
-
-
-
-30
BT1074Bi
Units
dB
dBm
dBm
dBm
dBm
dB
Ω
dBm
dBm
MHz
dBc/Hz
dBc/Hz
dBm
MHz
dBc/Hz
dBc/Hz
dBm
TRFIC
R
RFICs for 850 - 2400MHz
* The values in these sections refer to the 902-928MHz application. To use the BT1074B in the 868-
870MHz band, only the RF VCO, IF VCO, power combiner and LNA RF matching component values need
to be changed.
Absolute Maximum Ratings
Parameters
Supply Voltage
Power Control Voltage
Storage Temperature
Value
7
V
DD
+0.5
+150
Unit
V
V
o
C
Pin Table
Pin
Parameter
I/O
Description
Power and Ground Pins
63/64
60
59
32
VDDLNA1-2
VDD_DMX
VDD_IF
VDD_IFVCOIN
-
-
-
-
Power supply to LNA
Power supply to downconverters
Power supply to RX differential-to-single buffers
Power supply to IF VCO first stage
May 29, 2001
Confidential and Proprietary Information of BTI
Page 3
BT1074Bi
Pin
21
6
19/20
31
40
41
47
50
3
61/62
56
34
22/23
13/15/18
7/9/11
26/27
5
R
850-950MHz RF TRANSCEIVER
Parameter
I/O
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Description
Power supply to TX upconverters
Power supply to guard ring
Power supply to pre-amplifier
Power supply to transmitter
Power supply to IF VCO
Power supply to RF VCO
Power supply to RF VCO input stage
Power supply to receiver IF buffer
Ground to LNA
Ground to downconverters
Ground to RX differential-to-single buffers
Ground to IF VCO first stage
Ground to TX upconverters
Ground to pre-amplifier
Ground to power amplifier
Ground to transmitter
Ground to RX LNA differential first stage
Ground to RX LNA differential first stage
Ground to IF VCO buffer
Ground to IF VCO
Ground to RF VCO
Ground to RF VCO input stage
Ground to receiver IF buffer
Ground to IF VCO buffer
VDD_UPC
VDDPA_GR
VDD_PRE1-2
VDD_TXIF
VDDIF_VCO
VDDRF_VCO
VDDRFVCOIN
VDDRX_BUF
GNDLNA
GND_DMX1-2
GND_IF
GND_IFVCOIN
GND_UPC1-2
GND_PRE1-3
GND_PA1-3
GND_TXIF1-2
GNDLNA1P
GNDLNA1N
GNDIFBUF
GNDIF_VCO
GNDRF_VCO
GNDRFVCOIN
GNDRX_BUF
IF_VCO_GND
RFICs for 850 - 2400MHz
1
37
39
42
44
53
33
TRFIC
Local Oscillator Pins
38
36
35
43
45
46
IF_VCO_OUT
IFCAPIN
IF_VCO_CTRL
RF_VCO_OUT
RF_VCO_CTRL
RFVCOCAPIN
O
I
I
O
I
I
IF VCO output
IF VCO feedback capacitors input
IF VCO control input
RF VCO output
RF VCO control input
RF VCO resistor bias input
Transmitter Pins
8
10
24
12
14
RF_OUTN
RF_OUTP
TX_P_CNT
REXT2
REXT1
O
O
I
I
I
Power amplifier output
Power amplifier output
Transmission output power control: Hi - low power mode
Low - high power mode
Bias for power amplifier
Bias for power amplifier
May 29, 2001
Confidential and Proprietary Information of BTI
Page 4
850-950MHz RF TRANSCEIVER
BT1074Bi
I/O
O
O
I
I
I
Pin
16
17
28
29
30
Parameter
LEXTN
LEXTP
TXI
M_REF
TXQ
Description
Output to external inductors
Output to external inductors
Baseband quadrature input to the transmitter
I/Q input DC reference
Baseband in-phase input to the transmitter
Receiver Pins
4
2
55
54
51
52
58
57
RF_INP
RF_INN
VCO2_IN
MIXERINP
MIXOUTN
MIXOUTP
RMX_OUTP
RMX_OUTN
I
I
I
I
O
O
O
O
RF Differential Input to the receiver
RF Differential Input to the receiver
Second Mixer’s input
RF input to the second mixer
Differential output of second downconverter mixer
Differential output of second downconverter mixer
Differential output of downconverter mixer
Differential output of downconverter mixer
TRFIC
R
RFICs for 850 - 2400MHz
Power Down Pins
25
49
48
TX_EN
RX_EN
RF_VCO_EN
I
I
I
Transmitter power down control
Receiver power down control
RF VCO power down control
Detailed Pin Description:
RECEIVER
RF_INP and RF_INN (Pin 4 and Pin 2)
RF Differential Inputs
RF_INP and RF_INN are the differential inputs of the LNA. An AC coupling capacitor of 100pF is required.
RF differential inputs are generated by an external phase-splitter circuit, but for a single RF input, the LNA
can be biased, as shown in the
Application Circuit.
For optimum performance, the component lead
length of the external phase-splitter circuit and PCB traces to the LNA input pins should be minimized.
Also, the ground plane must surround the phase -splitter circuit to prevent noise coupling from other cir-
cuits. The frequency range is from 890MHz to 940MHz.
RMX_OUTP and RMX_OUTN (Pin 58 and Pin 57)
First IF Differential Outputs
These are the differential outputs of the internal IF buffers. With the external IF combiner circuit as shown
in the
Application Circuit,
the differential outputs become a single-ended output to drive a 110.592MHz
Bandpass SAW filter. These internal IF buffers have open-drain outputs to drive an input impedance of a
300Ω BPF through the external combiner circuit.
MIXERINP (Pin 54)
Second IF Amplifier Input
The output of a 110.592MHz BPF SAW filter is connected to this pin for the second stage downconversion.
No AC coupling is required.
May 29, 2001
Confidential and Proprietary Information of BTI
Page 5
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