ATMEL T0782

Features
•
•
•
•
•
•
•
•
Active Mixer with Conversion Gain
No External LO Driver Necessary
Low LO Drive Level Required
RF and LO Ports May Be Driven Single-ended
Single 5-V Supply Voltage
High LO-RF Isolation
Broadband Resistive 50-Ω Impedances on All Three Ports
Small SSO16 Package
2200-2700 MHz
High Linearity
SiGe Active
Receive Mixer
Applications
• Digital Communication Systems
• 2200 MHz to 2700 MHz Transceivers for Base Stations
Electrostatic sensitive device.
Observe precautions for handling.
T0782
Description
The T0782 is a high-linearity active mixer which is manufactured using Atmel’s
advanced Silicon-Germanium technology. This mixer features a frequency range of
2200 MHz to 2700 MHz. It operates from a single 5-V supply and provides 10 dB of
conversion gain while requiring only 0 dBm input to the integrated LO driver. An IF
amplifier is also included.
Preliminary
The T0782 incorporates internal matching on each RF, IF and LO port to enhance
ease of use and to reduce the external components required. The RF and LO inputs
can be driven differentially or single-ended.
Figure 1. Block Diagram
RFP
RFN
4
5
1
16
13
IFP
IFN
LOP
12
LON
Rev. 4526A–SIGE–03/02
1
Pin Configuration
Figure 2. Pinning SSOP16
IFP
VCC
GND
RFP
RFN
GND
VCC
L1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IFN
VCC
GND
LOP
LON
GND
VCC
L2
Pin Description
Pin
Symbol
Function
1
IFP
IF positive output
2
VCC
5-V power supply
3
GND
Ground
4
RFP
RF positive input
5
RFN
RF negative input
6
GND
Ground
7
VCC
5-V power supply
8
L1
External inductor terminal
9
L2
External inductor terminal
10
VCC
5-V power supply
11
GND
Ground
12
LON
Local oscillator, negative input
13
LOP
Local oscillator, positive input
14
GND
Ground
15
VCC
5-V power supply
16
IFN
IF negative output
Absolute Maximum Ratings
All voltages are referred to GND
Parameters
Symbol
Value
Unit
VCC
5 to 6.0
V
LO input
LOP, LON
10
dBm
IF input
RFP, RFN
15
dBm
Supply voltage
Operating temperature
TOP
-40 to +85
°C
Storage temperature
Tstg
-40 to +150
°C
2
T0782
4526A–SIGE–03/02
T0782
Thermal Resistance
Parameter
Symbol
Value
Unit
RthJA
TBD
K/W
Junction ambient
Electrical Characteristics
Test conditions: Vcc = +5 V, Tamb = +25°C
RF input: –20 dBm at 2450 MHz
LO output: 0 dBm at 2250 MHz
No.
Parameters
Test Conditions / Pins
Pin
Symbol
Min.
f
2200
FIF
10
Typ.
Max.
Unit
2700
MHz
300
MHz
Type *
AC Performance
Frequency range
IF frequency range
Output IP3
RF1 = RF2 = –17 dBm/tone
200
IP3
15.5
dBm
Output P1dB
4.5
dBm
Conversion gain
10.5
dB
SSB noise figure
15.5
dB
RF return loss
14
dB
LO return loss
14
dB
IF return loss
14
dB
LO drive
–3
0
+3
dBm
Isolation Performance
Leakage (LO-RF)
–30
dBm
Leakage (LO-IF)
–30
dBm
Miscellaneous
Supply voltage
VCC
Supply current
ICC
4.75
5
5.25
150
V
mA
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Typical Device Performance
Figure 3. Conversion Gain versus RF Frequency, VCC = 5.0 V, LO = 0 dBm, RFIN = –20 dBm, IF = 200 MHz
14
12
%
G
Q
L
D
*
10
8
6
2300
2350
2400
2450
2500
2550
5) )UHTXHQF\ 0+]
3
4526A–SIGE–03/02
Figure 4. Return Loss versus RF Frequency, VCC = 5.0 V
0
-10
E
G
V
V
R
/
Q
U
X
W
H
5
-20
-30
-40
-50
2300
2350
2400
2450
2500
2550
2400
2500
5) )U HTXHQF\ 0+]
Figure 5. Return Loss at LO Input, VCC = 5.0 V
0
-10
E
G
V
V
R
/
Q
U
X
W
H
5
-20
-30
-40
-50
2000
2100
2200
2300
/2 )U HTXHQF\ 0+]
Figure 6. Return Loss versus IF Frequency, VCC = 5.0 V
0
5
E
G
V
V
R
/
Q
U
X
W
H
5
10
15
20
25
150
175
200
225
250
, ) )U HTXHQF\ 0+]
4
T0782
4526A–SIGE–03/02
T0782
Figure 7. Demo Test Board Schematic
5V
IFout
J5
Lfil
C3
1
2
3
4
5
6
7
8
Vcc
C4
RFin
R1
J3
C5
R2
Vcc
C20
L1
T0782
T2
C7 IC1
Vcc
C9
16
15
14
13
12
11
10
9
C1
Vcc
C11
R3
LOin
L4
J4
R4
C12
Vcc
C21
L2
Vcc
Vcc
C6
C10
Bill of Material
Component Designator
Vendor
Part Number
IC1
Value
Atmel
T0782
J3, J4, J5
Johnson
Components
142-0701-851
Mini-circuits
TC1-1
Description
SiGe receiver mixer
SMA connector, end launch with tab, for
0.062 inch thick board
T2
1:1
Lfil
1 µH
IF transformer
L1, L2
100 nH
C1, C3, C20, C21
5.6 pF
Capacitor, 0603 footprint
C6, C10
100 pF
Capacitor, 0603 footprint
C7, C9
120 pF
Capacitor, 0603 footprint
C4, C5
1.2 pF
Capacitor, 0603 footprint
C11, C12
1.5 pF
Capacitor, 0603 footprint
Inductor, 1210 footprint, minimum 200 mA rating
TOKO
LL1608-FSR10J
Inductor, 0603 footprint, high Q series
R1, R2, R3, R4
0Ω
Resistor, 0603 footprint
L4
27 nH
Inductor, 0603 footprint
5
4526A–SIGE–03/02
Figure 8. Demo Test Board (Fully Assembled PCB)
J5
47 mm
T2
C9
C1
IC1
T0782
T9
C7
C3
C4
L3
T11
C12
C21
C5
C20
J3
C11
L4
C6
J4
L2
L1
C10
Lfil
CON
2
1
47 mm
Figure 9. Recommended Package Footprint
31.75
3.0
6.35
0.74
0.4
0.74
3.0
φ0.33 via
0.7
0.9
6.9
all units are in mm
- Indicates metalization
- vias connect pad to underlying ground plane
Remark: heatslug must be soldered to GND.
6
T0782
4526A–SIGE–03/02
T0782
Ordering Information
Extended Type Number
Package
T0782
SSOP16
Remarks
Package Information
7
4526A–SIGE–03/02
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4526A–SIGE–03/02
xM