The second amplifier, RFA2, provides 51 dB of gain below satura- tion. The output of RFA2 drives a full-wave detector with 19 dB of threshold gain. The onset of saturation in each section of RFA2 is detected and summed to provide a logarithmic response. This is added to the output of the full-wave detector to produce an overall detector response that is square law for low signal levels, and tran- sitions into a log response for high signal levels. This combination provides excellent threshold sensitivity and more than 70 dB of detector dynamic range. In combination with the 30 dB of AGC
| SYMBOL | PARAMETER | CONDITIONS | TEST CIRCUIT | MIN | TYP. | MAX | UNIT |
| Vs | Reset detection threshold | | | Vs - 2% | Vs | Vs +2% | V |
| CVs | Hysteresis | VDD = 0 V VS +1.0 V} 0 V | VS×0.03 | VS×0.05 | VS×0.08 | V |
| vsior | Threshold voltage temperature coefficient | -40 IC " Tamb " +85 IC | 1 Fig16 | | +0 .01 | | %/YC |
| lcc | Supply current | VDD= VS +1.0 V | | 0 25 | 1 0 | |
| IOH | IDS leakage current when OFF | VDD = VDS = 10 V | 3 Fig18 | | | 0 1 | |
| lNDS1 | N-channel IDS output sink current 1 | VDD = 1.2 V; VDS = 0.5 V | | -0.23 | -1.4 | | mA |
| lNDS2 | N-channel IDS output sink current 2 (for Vs > 2.6 V) | VDS = 0.5 V; VDD = 2.4 V | 2 Fig17 | -1.6 | -8.3 | | mA |
| INDS3 | N-channel IDS output sink current 3 (for Vs > 3.9 V) | VDS = 0.5 V; VDD = 3.6 V | -3.2 | -14.7 | | mA |
| IPDS1 | P-channel IDS output source current 1 (for Vs < 4.0 V) | VDS = 0.5 V; VDD = 4.8 V | | 0 36 | 2 1 | | mA |
| IPDS2 | P-channel IDS output source current 2 (for Vs < 5.7 V) | VDS = 0.5 V; VDD = 6.0 V; 4.0 V < Vs < 5.7 V | 3 Fig18 | 0 46 | 2 5 | | mA |
| IPDS3 | P-channel IDS output source current 3 (for Vs < 5.7 V) | VDS = 0.5 V; VDD = 8.4 V | 0 59 | 3 3 | | mA |
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