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ABSD-11278PSM
12 GHz Single Ended to Differential Active Balun
The ABSD-11278PSM is a GaAs active MMIC balun in a 3mm QFN surface mount package. Its frequency ranges from DC to 12 GHz. The ABSD-11278PSM operates from a single supply voltage, enabling low power consumption. The 3mm QFN package is a lead free, RoHS compliant package compatible with standard leaded and lead-free solder reflows. Connectorized evaluation packages are available. The ABSD-11278PSM is an excellent choice for single ended to differential mode conversion and higher order Nyquist sampling in analog to digital converters.
| Parameter | Typ | Unit |
|---|---|---|
| Frequency Range | 0 to 12 | GHz |
| Insertion Loss | 6.3 | dB |
| Phase Balance | 0.5 | ° |
| Amplitude Balance | 0.25 | dB |
| Impedance Ratio | 2:1 | - |
Summary only – refer to the Electrical Specifications, Absolute Maximum Ratings, and Recommended Operating Range tables for complete details.
| Part Number | Description | Package | Green Status | Product Lifecycle | Export Classification |
|---|---|---|---|---|---|
| ABSD-11278PSM | 12 GHz Single Ended to Differential Active Balun | QFN | REACH RoHS | Released | EAR99 |
| EVB-ABSD-11278P | Evaluation Board | EVB | Released | - |
Three-port scattering parameters measured as three single-ended 50Ω ports unless otherwise noted. Small signal gain, return losses and reverse isolation have evb and connector effects de-embedded.
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Measurements are with 50-Ω single-ended input, and 100-Ω differential output. EVB and connector effects are included in these measurements.
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Measured as two single-ended Noise Figure measurements with unused port terminated in 50 ohm load.
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Specifications guaranteed for +25°C, measured in a 50Ω system. Measured data was taken on an evaluation board and includes PCB trace and connector effects unless otherwise noted.
| Parameter | Test Conditions | Minimum Frequency (GHz) | Maximum Frequency (GHz) | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|---|
| Frequency Range | - | 0 | 12 | - | - | - | GHz |
| OIP2 | Differential OIP2, measured at -5dBm input power | 0 | 12 | - | 36 | - | dBm |
| OIP3 | Differential OIP3, measured at -5dBm input power | 0 | 12 | - | 24 | - | dBm |
| Noise Figure | Single-Ended Noise Figure, Input to RF Out + | 0 | 12 | - | 15 | - | dB |
| Noise Figure | Single-Ended Noise Figure, Input to RF Out - | 0 | 12 | - | 7.3 | - | dB |
| Reverse Isolation | RF Out + to Input | 0 | 12 | - | -40 | - | dB |
| Reverse Isolation | RF Out - to Input | 0 | 12 | - | 6 | - | dB |
| Isolation between differential ports | Insertion Loss going from RF Out + to RF Out - | 0 | 12 | - | 39 | - | dB |
| Isolation between differential ports | Insertion Loss going from RF Out - to RF Out + | 0 | 12 | - | 6 | - | dB |
| Amplitude Balance | 5V/49mA | 0 | 12 | - | 0.25 | - | dB |
| Common Mode Rejection Ratio | 5V/49mA | 0 | 12 | - | 36 | - | dB |
| Common Port Return Loss 1 | 5V/49mA | 0 | 12 | - | 28 | - | dB |
| DC Supply Quiescent Current (Idq) | Vd=5V | - | - | - | 49 | - | mA |
| HD2 | Differential HD2 (dBc) at 5V/49mA, differential output power=-9dBm | 0 | 12 | - | -51 | - | dBc |
| HD3 | Differential HD3 (dBc) at 5V/49mA, with differential output power=-9dBm | 0 | 12 | - | -70 | - | dBc |
| Impedance Ratio | - | - | - | - | 2:1 | - | - |
| Insertion Loss 2 | 5V/49mA | 0 | 12 | - | 6.3 | - | dB |
| Nominal Phase Shift | 5V/49mA | 0 | 12 | - | 180 | - | ° |
| Output Return Loss 3 | 5V/49mA | 0 | 12 | - | 22 | - | dB |
| Phase Balance | 5V/49mA | 0 | 12 | - | 0.5 | - | ° |
[1][2][3] Measured single-ended with connector and evb effects de-embedded.
| Parameter | Min | Nominal | Max | Unit |
|---|---|---|---|---|
| Positive DC Voltage (Vd) | 5 | 5 | 5 | V |
| Positive DC Current (Id) (No RF Input) | 49 | 49 | 49 | mA |
The Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. If these limits are exceeded, the device may be inoperable or have a reduced lifetime. This device is designed and characterized in a 50Ω system (100Ω differential output), and operation in a reflective environment can cause performance degradation.
| Parameter | Maximum Rating | Unit |
|---|---|---|
| Drain Current (Id) (No RF Applied) 1 | 60 | mA |
| Drain Supply Voltage (Vd) | 5 | V |
| Maximum Operating Temperature | 85 | °C |
| Maximum Storage Temperature | 150 | °C |
| Minimum Operating Temperature | -40 | °C |
| Minimum Storage Temperature | -65 | °C |
| RF Input Power | 15 | dBm |
| Thermal Resistance, θJC | 62 | ºC/W |
[1] Max current density across TFR
| Parameter | Details | Rating |
|---|---|---|
| ESD | < 50 Volts | HBM 0Z |
| Dimensions | - | 3 x 3 mm |
| Moisture Sensitivity Level | - | MSL 1 |
Below is the port diagram for the ABSD-11278PSM. The diagram is shown as an x-ray view from the top down.
| Port | Function | Description | DC Equivalent Circuit |
|---|---|---|---|
| 11 | Vd | Pin 11 is the positive DC supply voltage for the device. Connect to +5V for normal operation. | - |
| 1,3,4,6,8,10 and 12 | Non-connect (NC) | These pins are not connected internally. Datasheet performance is tested with NC pins grounded. | - |
| 2 | RF Input | Pin 2 is the RF input of the device. This pin is internally RF matched to 50 Ohms and is DC coupled. This pin requires an external DC blocking capacitor. | - |
| 5 | Vg | Pin 5 is connected to an internal DC voltage for the device. This pin should be left open for normal operation. Do not connect to ground. | - |
| 7 | RF Out - | Pin 7 is the negative RF output of the device. This pin is internally RF matched to 50 Ohms and is DC coupled. This pin requires an external DC blocking capacitor. | - |
| 9 | RF Out + | Pin 9 is the positive RF output of the device. This pin is internally RF matched to 50 Ohms and is DC coupled. This pin requires an external DC blocking capacitor. | - |
| Paddle | Ground | Ground pad should be connected to RF/DC ground with low electrical and thermal resistance. | - |
The application circuit for the ABSD-11278PSM is shown above. This part requires DC blocking capacitors at all RF pins ( 2,7 and 9). DC power is supplied via Vd (pin 11). It is recommended to provide 0.1uF bypass capacitors connected to Vd and Vg. Do not apply DC voltage to Vg pin. NC pins are not internally connected but should be grounded. The paddle of the QFN should be connected to GND via a low thermal and electrical resistance.
Download : Outline 2D Drawing
Download : Footprint Drawing
| Revision Code | Revision Date | Comment |
|---|---|---|
| - | 2026-11-10 | Initial Release |
The RF transitions on the input and output traces of the recommended footprint are specific to the material type and thickness used on the Marki evaluation board. They are currently designed for single-ended 50 Ohm transmission line. They will need to be re-designed for pcb stackups using different materials and or different transmission line impedances.
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