The LD511-HYB contains a Class A compression amplifier that can operate over a range of DC battery voltages from 1.1V to 2.4V. A voltage regulator, which is independent of supply voltage variations, is on-chip to supply a stable 0.94VDC bias to the amplifier circuitry and to the microphone.
The LD511-HYB, in compression, has approximately 15dB of threshold adjustment by varying RTH and a compression function ratio of ∞ : 1.
Minimum attack and release times are fixed at 7ms and 40ms, respectively, and can be adjusted simultaneously by changing the filter capacitor on Pad 8, although the ratio of attack to release time is kept constant.
The output stage bias can be set to accommodate different receiver impedances by changing the value of RE. The voltage across RE (Pad 2 to Ground) is a constant 27mV so the bias current is 27mV divided by the total value of RE in parallel with 500Ω.
Features
64dB typical electrical gain
0.94VDC voltage regulator
7ms attack time; 40ms release time
15dB threshold adjustment
Low noise and distortion
Compression ratio ∞ : 1
0.3kHz - 6kHz frequency response
Also available as E1 (RoHS Compliant Hybrid)
Standard Packaging
Hybrid Typical Dimensions:
0.0945 x 0.1115 x 0.042in
(2.40 x 2.83 x 1.07mm)
