T0780 ATMEL | Alldatasheet
Document overview
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Technical content
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
Applications
Digital Communication Systems 800 MHz to 1000 MHz Transceivers for Base Stations Electrostatic sensitive device. Observe precautions for handling.
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
800 MHz -
1000 MHz
2 T0780 [Preliminary]
Figure 2. Pinning SSOP16
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
All voltages are referred to GND.
T0780 [Preliminary] 4525D–SIGE–10/03 Thermal Resistance Parameters Symbol Value Unit Junction ambient R thJA TBD K/W Junction case R thJC 46 °C/W
Electrical Characteristics
Test Conditions: VCC = +5 V, Tamb = +25°C; RF input: -20 dBm at 900 MHz; LO output: 0 dBm at 700 MHz No. Parameters Test Conditions/Pins Pin Symbol Min. Typ. Max. Unit Type *
1 AC Performance
1.1 RF frequency range f RF 800 1000 MHz B, C
1.11 LO frequency range f LO 500 1000 MHz B, C
1.2 IF frequency range F IF 30 200 300 MHz B, C
1.5 Conversion gain 7 10 dB A
1.6 SSB noise figure 15 19 dB D
1.3 Input IP3 RF1 = RF2 = –15 dBm/tone,
1M H z s p a c i n g IP3 15 19 dBm D
1.4 Input P1dB 2 5 dBm D
1.7 RF return loss Matched to 50 /g87
(1) 20 dB D
1.8 LO return loss Matched to 50 /g87(1) 20 dB D
1.9 IF return loss Matched to 50 /g87(1) 20 dB D
1.10 LO drive Matched to 50 /g87(1) -3 0 +3 dBm D
2 Isolation Performance
2.1 Leakage (LO-RF) Single-ended configuration -40 -35 dBm D
2.2 Leakage (LO-IF) Single-ended configuration -26 -20 dBm D
2.3 Leakage (RF-IF) Single-ended configuration -40 -35 dBm D
3 Miscellaneous
3.1 Supply voltage V
CC 4.75 5 5.25 V A
3.1 Supply current I CC 160 180 mA A
*) 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.
4 T0780 [Preliminary]
Figure 3. Conversion Gain versus Temperature Figure 4. Conversion Gain versus LO Drive, Tamb = 25/g176C Figure 5. Leakages, Plo = 0 dBm, Prf = -20 dBm, Single-ended Configuration
6 T0780 [Preliminary]
Figure 9. RF and LO Return Loss Tamb = 25/g176C Figure 10. IF Return Loss Tamb = 25/g176C Figure 11. Input P1dB versus Temperature, Plo = 0 dBm
8 T0780 [Preliminary]
with L7 = L9 = 100 nH, resulting in a 200 MHz resonant IF. Table 1. IF Tank Circuit
10 T0780 [Preliminary]
4525D–SIGE–10/03
Package Information
Ordering Information
Extended Type Number Package Remarks T0780-6C SSOP16 –
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