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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- Impedances on All Three Ports Small SSO16 Package
Applications
* Digital Communication Systems * 800 MHz to 1000 MHz Transceivers for Base Stations
Electrostatic sensitive device. Observe precautions for handling.
800 MHz 1000 MHz High Linearity SiGe Active Receive Mixer T0780 Preliminary
Description
The T0780 is a high linearity active mixer which is manufactured using Atmel's advanced Silicon-Germanium (SiGe) technology. This mixer features a frequency range of 800 MHz to 1000 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. The T0780 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. 4525D-SIGE-10/03
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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IFP VCC GND RFP RFN GND VCC L1 L2 VCC GND LON LOP GND VCC IFN Function IF positive output 5-V power supply Ground RF positive input RF negative input Ground 5-V power supply External inductor terminal External inductor terminal 5-V power supply Ground Local oscillator, negative input Local oscillator, positive input Ground 5-V power supply IF negative output
Absolute Maximum Ratings
All voltages are referred to GND.
Parameters Supply voltage LO input IF input Operating temperature Storage temperature Symbol VCC LOP, LON RFP, RFN TOP Tstg Value 5 to 5.5 10 15 -40 to +85 -65 to +150 Unit V dBm dBm C C
2
T0780 [Preliminary]
4525D-SIGE-10/03
T0780 [Preliminary]
Thermal Resistance
Parameters Junction ambient Junction case Symbol RthJA RthJC Value TBD 46 Unit K/W C/W
Electrical Characteristics
Test Conditions: VCC = +5 V, Tamb = +25C; RF input: -20 dBm at 900 MHz; LO output: 0 dBm at 700 MHz
No. 1 1.1 1.11 1.2 1.5 1.6 1.3 1.4 1.7 1.8 1.9 1.10 2 2.1 2.2 2.3 3 3.1 3.1 Parameters AC Performance RF frequency range LO frequency range IF frequency range Conversion gain SSB noise figure Input IP3 Input P1dB RF return loss LO return loss IF return loss LO drive Isolation Performance Leakage (LO-RF) Leakage (LO-IF) Leakage (RF-IF) Miscellaneous Supply voltage Supply current VCC ICC 4.75 5 160 5.25 180 V mA A A Single-ended configuration Single-ended configuration Single-ended configuration -40 -26 -40 -35 -20 -35 dBm dBm dBm D D D Matched to 50 W(1) Matched to 50 W(1) Matched to 50 W
(1) (1)
Test Conditions/Pins
Pin
Symbol fRF fLO FIF
Min. 800 500 30 7
Typ.
Max. 1000 1000
Unit MHz MHz MHz dB dB dBm dBm dB dB dB
Type * B, C B, C B, C A D D D D D D D
200 10 15
300 19
RF1 = RF2 = -15 dBm/tone, 1 MHz spacing
IP3
15 2
19 5 20 20 20
Matched to 50 W
-3
0
+3
dBm
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Notes: 1. The return losses shown were measured with the T0780 mounted on Atmel's FR4 evaluation boards using standard matching practices as indicated on the application schematic page herein. Users following the RF, LO and IF matching guidelines will achieve similar performance.
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4525D-SIGE-10/03
Typical Device Performance
Figure 3. Conversion Gain versus Temperature
Conversion Gain vs Tem perature 20 Conversion Gain (dB) 16 12 8 4 0 800 -40C +25C +85C 850 900 Frequency (MHz) 950 1000
Figure 4. Conversion Gain versus LO Drive, Tamb = 25C
Conversion Gain vs LO Drive T=+25C 20 Conversion Gain (dB) 16 12 8 4 0 800 Plo=-3dBm Plo=0dBm Plo=+3dBm 850 900 Frequency (MHz) 950 1000
Figure 5. Leakages, Plo = 0 dBm, Prf = -20 dBm, Single-ended Configuration
Leakages Plo=0 dBm , Prf=-20 dBm Singled-Ended Configuration (Note 1) LO-RF LO-IF RF-IF
0 -10 Leakage (dBm) -20 -30 -40 -50
-60 800
850
900 950 Frequency (MHz)
1000
4
T0780 [Preliminary]
4525D-SIGE-10/03
T0780 [Preliminary]
Figure 6. Input IP3 versus Temerature
Input IP3 vs Tem perature 30 Input IP3 (dBm) 25 20 15 10 800 -40C +25C +85C
850
900 Frequency (MHz)
950
1000
Figure 7. Input IP3 versus LO Drive, Tamb = 25C
Input IP3 vs LO Drive T=+25C 30 Input IP3 (dBm) 25 20 15 10 800 Plo=-3dBm Plo=0dBm Plo=+3dBm
850
900 Frequency (MHz)
950
1000
Figure 8. Noise Figure versus Temperature, Plo = 0 dBm
Noise Figure vs Tem perature Plo=0dBm 20 Noise Figure (dB) 18 16 14 12 10 800 -40C +25C +85C 850 900 Frequency (MHz) 950 1000
5
4525D-SIGE-10/03
Figure 9. RF and LO Return Loss Tamb = 25C
RF & LO Return Loss (Note 2) T=+25C 0 Return Loss (dB) -5 -10 -15 -20 -25 -30 600 700 800 900 Frequency (MHz) 1000 RF RL LO RL
Figure 10. IF Return Loss Tamb = 25C
IF Return Loss (Note 2) T=+25C 0 Reutrn Loss (dB) -5 -10 -15 -20 -25 -30 30 75 120 165 210 255 300 Frequency (MHz)
Figure 11. Input P1dB versus Temperature, Plo = 0 dBm
Input P1dB vs Tem perature Plo=0dBm 10 -40C Input P1dB (dBm) 8 6 4 2 0 800 +25C +85C
850
900 Frequency (MHz)
950
1000
6
T0780 [Preliminary]
4525D-SIGE-10/03
T0780 [Preliminary]
Figure 12. Input P1dB versus LO Drive, Tamb = 25C
Input P1dB vs LO Drive T=+25C 10 Input P1dB (dBm) 8 6 4 2 0 800 Plo=-3dBm Plo=0dBm Plo=+3dBm
850
900 Frequency (MHz)
950
1000
Figure 13. Demo Test Board Schematic
5V
IFout L1 J1
Vcc
C2 T1 IC1 1 2 3 4 5 6 7 8 L7 16 15 14 13 12 11 10 9 L9 C3
C1
C4
C5
Vcc
C6 RFin J2 T2 C10 C12
Vcc
C7 LOin J3 C11 T3
Vcc
T0780
Vcc
C13
Vcc
C15
Vcc
C14
7
4525D-SIGE-10/03
Bill of Material
Component Designator IC1 J1, J2, J3 T1 L1 L7, L9 C4, C5, C12, C13 C14, C15 C2, C3 C1 T2, T3 C6, C10 C7, C11 1:1 1 H see Table 1 27 pF 100 pF 120 pF 10 F 1:1 15 pF 18 pF Value Vendor Atmel Johnson ComponentsTM Mini-Circuits(R) Wurth Elektronik
(R)
Part Number T0780 742-0711-841 TC1-1 74476401 744786110 VJ0402A 270JXXA_ VJ0402A101JXXA_ VJ0402A121JXXA_ T491A106_010AS
(R)
Description SiGe receiver mixer SMA connector, end launch with tab, for 1.07 mm board IF transformer Inductor, 1210 footprint, minimum 200 mA rating Inductor, 0603 footprint, high Q series Capacitor, 0402 footprint Capacitor, 0402 footprint Capacitor, 0402 footprint Tantal chip capacitor, size A RF transformer Capacitor, 402 footprint Capacitor, 402 footprint
Wurth Elektronik Vishay(R) Vishay Vishay KEMET
(R)
Panasonic Vishay Vishay
EHF-FD1618 VJ0402A150JXXA_ VJ0402A180JXXA_
The T0780 utilizes an IF tank circuit to maximize performance across the entire IF bandwidth. the off-chip inductors L7 and L9 resonate with an on-chip capacitor (4 pF) to provide IF tunability. therefore, L7 and L9 must be selected such that the resonance occurs at the desired IF. The following table provides the inductor values required on the evaluation board for some common intermediate frequencies. By default, all evaluation board are shipped with L7 = L9 = 100 nH, resulting in a 200 MHz resonant IF. Table 1. IF Tank Circuit
IF (MHz) Typical 70 150 200 300 L7, L9 (nH) 680 150 100 39 Wurth Elektonik Part Number 744780680 74478625 744786110 744786131
8
T0780 [Preliminary]
4525D-SIGE-10/03
T0780 [Preliminary]
Figure 14. Demo Test Board (Fully Assembled PCB)
Figure 15. Recommended Package Footprint In order to avoid soldering problems, plugging of the ground vias under the heat slug is recommended!
31.75
6.35 0.74 0.4 3.0 0.74
3.0
f0.33 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.
9
4525D-SIGE-10/03
Ordering Information
Extended Type Number T0780-6C Package SSOP16 Remarks -
Package Information
10
T0780 [Preliminary]
4525D-SIGE-10/03
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Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems.
(c) Atmel Corporation 2003. All rights reserved. Atmel (R) and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries, Johnson Components TM is a trademark of Emerson Electric Co., Wurth Elektronik(R) is a registered trademark of Adolf Wurth GmbH & Co. KG, Panasonic(R) is a registered trademark of Matsushita Electric Industrial Co., Ltd., Mini-Circuits(R) is a registered trademark of Scientific Components, Vishay (R) is a registered trademark of Vishay Intertechnology, Inc., KEMET (R) is a registered trademark of KRC Trade Corporation. Other terms and product names may be the trademarks of others. Printed on recycled paper.
4525D-SIGE-10/03

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