5.52 SD24_B, AC Performance
fSD24 = 1 MHz, SD24OSRx = 256, SD24REFON = 1 (see Figure 5-17)
| PARAMETER |
TEST CONDITIONS |
VCC |
MIN |
TYP |
MAX |
UNIT |
| SINAD |
Signal-to-noise + distortion ratio |
SD24GAIN: 1 |
fIN = 50 Hz(1) |
3 V |
84 |
86 |
|
dB |
| SD24GAIN: 2 |
|
85 |
|
| SD24GAIN: 4 |
|
84 |
|
| SD24GAIN: 8 |
81 |
83 |
|
| SD24GAIN: 16 |
|
80 |
|
| SD24GAIN: 32 |
71 |
73 |
|
| SD24GAIN: 64 |
|
67 |
|
| SD24GAIN: 128 |
|
61 |
|
| THD |
Total harmonic distortion |
SD24GAIN: 1 |
fIN = 50 Hz(1) |
3 V |
|
95 |
|
dB |
| SD24GAIN: 8 |
|
90 |
|
| SD24GAIN: 32 |
|
86 |
|
(1) The following voltages were applied to the SD24_B inputs: VI,A+(t) = 0 V + VPP / 2 × sin(2π × fIN × t) and VI,A–(t) = 0 V – VPP / 2 × sin(2π × fIN × t)
resulting in a differential voltage of VID = VI,A+(t) – VI,A–(t) = VPP × sin(2π × fIN × t) with VPP being selected as the maximum value allowed for a given range (according to SD24_B recommended operating conditions).