Renesas Electronics F1978
The F1978 Digital Step Attenuator (DSA) is a product in IDT’s Glitch-FreeTM DSA Family, which is optimized for the demanding requirements of CATV and satellite systems. It operates in the frequency range of 5MHz to 3000MHz. This device is offered in a compact 4mm 4mm, 20-pin Thin QFN package with a 75Ω impedance for ease of integration.| Part No. | F1978 |
|---|---|
| Datasheet | F1978 Download |
| Manufacturer |  Renesas Electronics |
| Description | Digital Step Attenuator |
| Buy | Stock & Price |
DESCRIPTION
This device is offered in a compact 4mm 4mm, 20-pin Thin QFN package with a 75Ω impedance for ease of integration. The F1978 DSA has RF performance identical to the F1975 Digital Step Attenuator. The difference between the F1978 and F1975 is that the F1978 has an additional programming mode called Direct Serial Programming. Consult the “Programming” section of this datasheet or the application note AN-945 “Comparison of F1975 and F1978 Digital Step Attenuator Serial Programming Methods.” Advantages Digital step attenuators are used in receivers and transmitters to provide gain control. The F1978 is a 6-bit step attenuator optimized for these demanding applications. The silicon design has very low insertion loss and low distortion (+64dBm IIP3). The device has pinpoint attenuation accuracy. Most importantly, the F1978 includes IDT’s Glitch-FreeTM technology, which results in low overshoot and ringing during most significant bit (MSB) transitions.● Glitch-FreeTM technology...
