Features:
- Broadband
- High Dynamic Range
- Customization on Demand
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Digital Controlled Attenuators
Digital Controlled Attenuator is a microwave component that can control the attenuation amount through digital signals.
Its implementation principle is to control the attenuation of the signal by adjusting the state of the internal component or the size of the input signal, changing the resistance value. Compared to traditional mechanical attenuators and variable resistors.
Digital controlled attenuators have the following advantages:
1. High precision: The digital control attenuator can achieve high-precision control of attenuation through digital control, usually reaching an accuracy of 0.1dB or less.
2. Broadband: Digital controlled attenuators typically operate in the GHz or even THz range and have a wide bandwidth.
3. Large dynamic range: The digital control attenuator can achieve an adjustable range from 0dB to 60dB or greater, and the adjustment range is wide.
4. Programmable control: The digital control attenuator can be programmed through digital interfaces such as SPI and I2C, with high flexibility.
Digital controlled attenuators are mainly used in fields such as microwave testing, radar, communication, and satellite communication. Taking the test application as an example, the digital control attenuator can be used to adjust the power of the test signal to measure the sensitivity and linearity of the DUT (Device Under Test); Can be used to calibrate the testing system to ensure its accuracy and consistency; It can be used for simulation testing scenarios to evaluate the anti-interference performance of the system against different interference and channel conditions.
Qualwave supplies broad band and high dynamic range digital controlled attenuators at frequencies up to 40GHz. The step can be 0.25dB and attenuation range can be 100dB or even more. Our digital controlled attenuators have good quality and high reliability, With more than 70 part numbers, which can meet the needs of different customers and are widely used in multiple fields.
Part Number |
Frequency(GHz, Min.)  |
Frequency(GHz, Max.) |
Attenuation Range(dB) |
Control Bits2 |
Step(dB) |
Accuracy(+/-) |
Insertion Loss(dB, Max.) |
VSWR(Max.) |
Switching Time(nS,max.) |
Power(dBm,max.) |
Lead Time(weeks) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| QDA-0-6000-30-1 | DC | 6 | 0~30 | - | 1 | 3~5% typ. | 2 | 1.5 | - | 20 | 3~6 |
| QDA-0-18000-11-1 | DC | 18 | 0~11 | - | 1 | ±1dB | 0.6+0.09/GHz | 1.75 | 20ms | 30 | 3~6 |
| QDA-0-18000-110-10 | DC | 18 | 0~110 | - | 10 | ±4.5dB | 0.6+0.09/GHz | 1.75 | 20ms | 30 | 3~6 |
| QDA-0-26500-11-1 | DC | 26.5 | 0~11 | - | 1 | ±1.15dB | 2.5 | 1.8 | 20ms | 30 | 3~6 |
| QDA-0-26500-90-10 | DC | 26.5 | 0~90 | - | 10 | ±2.95dB | 2.5 | 1.8 | 20ms | 50 | 3~6 |
| QDA-0-40000-11-1 | DC | 40 | 0~11 | - | 1 | ±1.2dB | 3 | 1.85 | 20ms | 30 | 3~6 |
| QDA-0-40000-90-10 | DC | 40 | 0~90 | - | 10 | ±5% | 3 | 1.85 | 20ms | 30 | 3~6 |
| QDA-0-50000-11-1 | DC | 50 | 0~11 | - | 1 | ±1.35dB | 3.5 | 1.85 | 20ms | 30 | 3~6 |
| QDA-0-50000-65-5 | DC | 50 | 0~65 | - | 5 | ±1.5dB | 4 | 1.6 | 20ms | 30 | 3~6 |
| QDA-0-50000-90-10 | DC | 50 | 0~90 | - | 10 | ±5.5% | 4 | 2.2 | 20ms | 30 | 3~6 |
| QDA-9K-20000-31.5-0.5 | 9K | 20 | 0~31.5 | - | 0.5 | ±1dB typ. | 6 | 2 | - | 25 | 3~6 |
| QDA-0.1-5000-110-1 | 0.0001 | 5 | 0~110 | 7 | 1 | ±3dB | 8 | 2.5 | 500 | 30 | 3~6 |
| QDA-10-18000-31.5-0.5 | 0.01 | 18 | 0~31.5 | - | 0.5 | ±1dB | 5.5 | 2 | 1μs | 25 | 3~6 |
| QDA-10-18000-63-1 | 0.01 | 18 | 0~63 | - | 1 | ±1.5dB typ. | 7.5 | 2 | 20 | 25 | 3~6 |
| QDA-10-18000-63.5-0.5 | 0.01 | 18 | 0~63.5 | 7 | 0.5 | ±2dB | 5 | 2.5 | - | - | 3~6 |
| QDA-10-18000-63.75-0.25 | 0.01 | 18 | 0~63.75 | 8 | 0.25 | ±2dB | 6 | 2.5 | - | - | 3~6 |
| QDA-10-20000-63.75-0.25 | 0.01 | 20 | 0~63.75 | - | 0.25 | ±1.5dB typ. | 8 | 2 | 20 | 25 | 3~6 |
| QDA-20-6000-31.5-0.5 | 0.02 | 6 | 0~31.5 | - | 0.5 | ±0.5dB typ. | 6 | 2 | - | 25 | 3~6 |
| QDA-20-18000-31.5-0.5 | 0.02 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-20-20000-31.5-0.5 | 0.02 | 20 | 0~31.5 | - | 0.5 | ±1dB typ. | 6 | 2 | - | 25 | 3~6 |
| QDA-50-4000-31-1 | 0.05 | 4 | 0~31 | 5 | 1 | ±0.5dB typ. | 3 | 1.8 | 1000 | 24 | 3~6 |
| QDA-100-6000-30-1 | 0.1 | 6 | 0~30 | - | 1 | ±1.5dB typ. | 5.5 | 2 | - | 30 | 3~6 |
| QDA-100-18000-31.5-0.5 | 0.1 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-100-18000-32-0.03 | 0.1 | 18 | 0~32 | 10 | 0.03 | ±2dB | 4.7 | 2.5 | - | - | 3~6 |
| QDA-100-18000-32-0.06 | 0.1 | 18 | 0~32 | 9 | 0.06 | ±2dB typ. | 5 | 2.5 | 5000 | 24 | 3~6 |
| QDA-100-26500-31.5-0.5 | 0.1 | 26.5 | 0~31.5 | 6 | 0.5 | ±2.5dB typ. | 6 typ. | 2 typ. | 50 | 27 | 3~6 |
| QDA-100-40000-31-1 | 0.1 | 40 | 0~31 | 5 | 1 | ±2dB | 9 | 2.2 | - | - | 3~6 |
| QDA-100-40000-32-0.03 | 0.1 | 40 | 0~32 | 10 | 0.03 | ±2dB | 6 | 2.5 | - | - | 3~6 |
| QDA-100-40000-32-0.06 | 0.1 | 40 | 0~32 | 9 | 0.06 | ±2dB typ. | 6 | 2.5 | - | - | 3~6 |
| QDA-100-40000-31.5-0.5 | 0.1 | 40 | 0~31.5 | - | 0.5 | ±1dB | 9 | 2.2 | - | 25 | 3~6 |
| QDA-100-50000-31.5-0.5 | 0.1 | 50 | 0~31.5 | 6 | 0.5 | ±2dB typ. | 11 | 2.5 | - | - | 3~6 |
| QDA-500-18000-31.5-0.5 | 0.5 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-500-18000-63.75-0.25 | 0.5 | 18 | 0~63.75 | - | 0.25 | ±1.5dB typ. | 7.5 | 2 | 20 | 25 | 3~6 |
| QDA-500-40000-31.5-0.5 | 0.5 | 40 | 0~31.5 | - | 0.5 | ±2dB | 7 | 2 | - | 25 | 3~6 |
| QDA-500-40000-63.5-0.5 | 0.5 | 40 | 0~63.5 | - | 0.5 | ±2dB | 11.5 | 1.7 | - | 25 | 3~6 |
| QDA-1000-2000-31.5-0.5 | 1 | 2 | 0~31.5 | - | 0.5 | ±0.5dB typ. | 3.6 | 1.8 | - | 25 | 3~6 |
| QDA-1000-2000-47.5-0.5 | 1 | 2 | 0~47.5 | 7 | 0.5 | 3% | 3.5 | 1.5 | 100 | 27 | 3~6 |
| QDA-1000-2000-63.5-0.5 | 1 | 2 | 0~63.5 | - | 0.5 | ±2.5dB | 5 | 1.7 | - | 25 | 3~6 |
| QDA-1000-2000-63.75-0.25 | 1 | 2 | 0~63.75 | 8 | 0.25 | ±1.5dB | 1.5 | 1.5 | - | - | 3~6 |
| QDA-1000-18000-31.5-0.5 | 1 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-1000-18000-31.5-0.5-1 | 1 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-1000-18000-63-1 | 1 | 18 | 0~63 | 6 | 1 | ±2dB typ. | 7.5 | 2 | 100 | 26 | 3~6 |
| QDA-1000-18000-127-0.5 | 1 | 18 | 0~127 | - | 0.5 | ±2.5dB typ. | 12.5 | 2.5 | 1us | 25 | 3~6 |
| QDA-1000-20000-63.5-0.5 | 1 | 20 | 0~63.5 | - | 0.5 | ±3dB typ. | 7 | 1.8 | - | 25 | 3~6 |
| QDA-1000-40000-31-1 | 1 | 40 | 0~31 | 5 | 1 | ±5% typ. | 8 | 2 | - | 27 | 3~6 |
| QDA-1000-40000-63.5-0.5 | 1 | 40 | 0~63.5 | - | 0.5 | ±2dB typ. | 11.5 | 2 | 200 | 25 | 3~6 |
| QDA-1000-50000-31.5-0.5 | 1 | 50 | 0~31.5 | 6 | 0.5 | ±2dB typ. | 11 | 2.5 | - | - | 3~6 |
| QDA-2000-4000-63.75-0.25 | 2 | 4 | 0~63.75 | 8 | 0.25 | ±1.5dB | 2 | 1.5 | - | - | 3~6 |
| QDA-2000-4000-31.5-0.5 | 2 | 4 | 0~31.5 | - | 0.5 | ±0.5dB typ. | 3.8 | 1.8 | - | 25 | 3~6 |
| QDA-2000-18000-15-1 | 2 | 18 | 0~15 | 4 | 1 | 4% | 7 | 2.2 | 500 | 20 | 3~6 |
| QDA-2000-18000-31.5-0.5 | 2 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-2000-18000-50-0.1 | 2 | 18 | 0~50 | - | 0.1 | ±2dB typ. | 7 | 2.5 | 500 typ. | 24 | 3~6 |
| QDA-2000-18000-60-0.1 | 2 | 18 | 0~60 | - | 0.1 | 5% typ. | 6 | 2 | - | 20 | 3~6 |
| QDA-2000-18000-60-10 | 2 | 18 | 0~60 | 3 | 10 | 4% | 14 | 2.2 | 500 | 20 | 3~6 |
| QDA-2000-18000-63.75-0.25 | 2 | 18 | 0~63.75 | - | 0.25 | ±1.5dB typ. | 7.5 | 2 | - | 25 | 3~6 |
| QDA-2000-40000-31.5-0.5 | 2 | 40 | 0~31.5 | - | 10 | ±2dB typ. | 7 | 2 | 1000 | 25 | 3~6 |
| QDA-4000-8000-31.5-0.5 | 4 | 8 | 0~31.5 | - | 0.5 | ±0.8dB typ. | 4.2 | 1.8 | - | 25 | 3~6 |
| QDA-4000-8000-63.75-0.25 | 4 | 8 | 0~63.75 | 8 | 0.25 | ±2dB typ. | 2.5 | 1.8 | - | - | 3~6 |
| QDA-4000-32000-31.5-0.5 | 4 | 32 | 0~31.5 | - | 0.5 | ±2dB typ. | 5.5 | 2 | 1000 | 25 | 3~6 |
| QDA-4000-32000-63.5-0.5 | 4 | 32 | 0~63.5 | - | 0.5 | ±2dB typ. | 10 | 2 | 200 | 25 | 3~6 |
| QDA-6000-6400-30-1 | 6 | 6.4 | 0~30 | - | 1 | ±(1+9%)dB | 5.5 | 2 | - | 30 | 3~6 |
| QDA-6000-18000-31.5-0.5 | 6 | 18 | 0~31.5 | - | 0.5 | ±1dB typ. | 5.5 | 2 | - | 25 | 3~6 |
| QDA-7000-9000-32-0.25 | 7 | 9 | 0~32 | - | 0.25 | ±2dB | 5.5 | 2 | - | 24 | 3~6 |
| QDA-8000-12000-31-1 | 8 | 12 | 0~31 | 5 | 1 | ±2% | 3.5 | 1.5 | 100 | 27 | 3~6 |
| QDA-8000-12000-31.5-0.5 | 8 | 12 | 0~31.5 | - | 0.5 | ±0.8dB typ. | 4.7 | 2 | - | 25 | 3~6 |
| QDA-8000-12000-63.75-0.25 | 8 | 12 | 0~63.75 | 8 | 0.25 | ±2dB | 2.8 | 1.8 | - | - | 3~6 |
| QDA-8000-12000-110-10 | 8 | 12 | 0~110 | 4 | 10 | 3~5% typ. | 8 | 1.5 | - | 20 | 3~6 |
| QDA-8000-18000-63.75-0.25 | 8 | 18 | 0~63.75 | - | 0.25 | ±1.5dB typ. | 7.5 | 2 | - | 25 | 3~6 |
| QDA-8200-12400-61-1 | 8.2 | 12.4 | 0~61 | 6 | 1 | 4% | 7 | 2.2 | 500 | 30 | 3~6 |
| QDA-8500-9500-31.5-0.25 | 8.5 | 9.5 | 0~31.5 | - | 0.25 | 3~5% typ. | 5.5 | 2 | - | 30 | 3~6 |
| QDA-9000-10000-47.5-0.5 | 9 | 10 | 0~47.5 | 7 | 0.5 | 3% | 5.5 | 1.8 | 100 | 27 | 3~6 |
| QDA-12000-18000-63.75-0.25 | 12 | 18 | 0~63.75 | 8 | 0.25 | ±2.5dB | 3.7 | 2.5 | - | - | 3~6 |
| QDA-18000-40000-31.5-0.5 | 18 | 40 | 0~31.5 | 6 | 0.5 | 6% | 8 | 2.5 | 500 | 27 | 3~6 |
| QDA-18000-40000-50-0.05 | 18 | 40 | 0~50 | 10 | 0.05 | ±2dB | 9 | 2.5 | - | - | 3~6 |
| QDA-18000-50000-31.5-0.5 | 18 | 50 | 0~31.5 | 6 | 0.5 | ±2dB typ. | 11 | 2.5 | 20 typ. | 25 | 3~6 |
| QDA-26500-40000-50-0.1 | 26.5 | 40 | 0~50 | - | 0.1 | ±2.5dB typ. | 9 | 2.5 | 5000 typ. | 24 | 3~6 |
| QDA-30000-40000-30-0.5 | 30 | 40 | 0~30 | - | 0.5 | 3~5% typ. | 5.5 | 1.5 | - | 25 | 3~6 |
| QDA-35000-40000-60-0.5 | 35 | 40 | 0~60 | 7 | 0.5 | - | 15 | 1.5 | - | 15 | 3~6 |
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