LL1591
Audio isolation transformer
LL1591 is a low cost audio isolation transformer, pin compatible with e.g. LL1527 and LL1581XL.
The purpose with LL1591 is to provide a low cost solution, when noise rejection requirements are small.
The LL1591 does not have internal faraday shields, nor mu metal housing.
| Turns ratio : | 1+1 : 1+1 |
| Spacing between pins : | 5.08 mm (0.2") |
| Spacing between rows of pins : | 27.94 mm (1.1") |
| Dimensions : (Max. L x W x H above PCB) | 37 x 22 x 17 (mm) |
| Recommended PCB hole diameter : | 1.5 mm |
| Weight : | 39 g |
| Static resistance of each primary : | 43Ω |
| Static resistance of each secondary : | 55Ω |
| Self resonance point : | > 120 kHz |
| Distortion : (primaries connected in series, source impedance 800Ω) | 0.2% @ +6 dBU, 50 Hz |
| Optimum load for best square-wave response : | 3 ~ 4 kΩ |
| Frequency response : (source 600Ω , load 10kΩ serial connection) | 10 Hz ~ 100 kHz ± 1 dB |
| Loss across transformer : (at midband, with above termination) | 0.4 dB |
| Isolation between windings/ between windings and core : | 3 kV / 1.5 kV RMS |
