SLAU367P October 2012 – April 2020
The programmable gain amplifier (PGA) allows adjusting the input signal amplitude to satisfy the input range of the SDHS modulator. The input gain can be adjusted by SDHSCTL6.PGA_GAIN[5:0]. See Table 22-2 for the PGA gain table.
| SDHSCTL6.PGA_GAIN[5:0] Bits | PGA Gain (Typical)
(dB) |
Tolerance | Shift (Entire Table) |
|---|---|---|---|
| 00xxxxb | –6.5 | ±1 dB | ±1 dB |
| 010000b | –6.5 | ±1 dB | ±1 dB |
| 010001b | –6.5 | ±1 dB | ±1 dB |
| 010010b | –5.5 | ±1 dB | ±1 dB |
| 010011b | –4.6 | ±1 dB | ±1 dB |
| 010100b | –4.1 | ±1 dB | ±1 dB |
| 010101b | –3.3 | ±1 dB | ±1 dB |
| 010110b | –2.3 | ±1 dB | ±1 dB |
| 010111b | –1.4 | ±1 dB | ±1 dB |
| 011000b | –0.8 | ±1 dB | ±1 dB |
| 011001b | 0.1 | ±1 dB | ±1 dB |
| 011010b | 1.0 | ±1 dB | ±1 dB |
| 011011b | 1.9 | ±1 dB | ±1 dB |
| 011100b | 2.6 | ±1 dB | ±1 dB |
| 011101b | 3.5 | ±1 dB | ±1 dB |
| 011110b | 4.4 | ±1 dB | ±1 dB |
| 011111b | 5.2 | ±1 dB | ±1 dB |
| 100000b | 6.0 | ±1 dB | ±1 dB |
| 100001b | 6.8 | ±1 dB | ±1 dB |
| 100010b | 7.7 | ±1 dB | ±1 dB |
| 100011b | 8.7 | ±1 dB | ±1 dB |
| 100100b | 9.0 | ±1 dB | ±1 dB |
| 100101b | 9.8 | ±1 dB | ±1 dB |
| 100110b | 10.7 | ±1 dB | ±1 dB |
| 100111b | 11.7 | ±1 dB | ±1 dB |
| 101000b | 12.2 | ±1 dB | ±1 dB |
| 101001b | 13.0 | ±1 dB | ±1 dB |
| 101010b | 13.9 | ±1 dB | ±1 dB |
| 101011b | 14.9 | ±1 dB | ±1 dB |
| 101100b | 15.5 | ±1 dB | ±1 dB |
| 101101b | 16.3 | ±1 dB | ±1 dB |
| 101110b | 17.2 | ±1 dB | ±1 dB |
| 101111b | 18.2 | ±1 dB | ±1 dB |
| 110000b | 18.8 | ±1 dB | ±1 dB |
| 110001b | 19.6 | ±1 dB | ±1 dB |
| 110010b | 20.5 | ±1 dB | ±1 dB |
| 110011b | 21.5 | ±1 dB | ±1 dB |
| 110100b | 22.0 | ±1 dB | ±1 dB |
| 110101b | 22.8 | ±1 dB | ±1 dB |
| 110110b | 23.6 | ±1 dB | ±1 dB |
| 110111b | 24.6 | ±1 dB | ±1 dB |
| 111000b | 25.0 | ±1 dB | ±1 dB |
| 111001b | 25.8 | ±1 dB | ±1 dB |
| 111010b | 26.7 | ±1 dB | ±1 dB |
| 111011b | 27.7 | ±1 dB | ±1 dB |
| 111100b | 28.1 | ±1 dB | ±1 dB |
| 111101b | 28.9 | ±1 dB | ±1 dB |
| 111110b | 29.8 | ±1 dB | ±1 dB |
| 111111b | 30.8 | ±1 dB | ±1 dB |