SBOA591 March 2024 ADS8881 , ADS8900B , ADS9224R , THS4551 , THS4552
Table 3-1 shows the comparison results between previous said four proposals. Customer can select any proposal previously mentioned for special applications.
| Scheme | Proposal 1 | Proposal 2 | Proposal 3 | Proposal 4 |
|---|---|---|---|---|
| ADC device | ADS9224R × 1 | ADS8881 × 2 | ADS8900B × 2 | ADS127L21×2 |
| ADC Resolution and Speed |
16-Bits 3-MSPS |
18-Bits 1-MSPS |
20-Bits 1-MSPS |
24-Bits 1.365-MSPS |
| ADC supply |
AVDD = 5V typical (Range: 4.5V to 5.5V) DVDD = 3.3V typical (Range: 1.65V to 5.5V |
AVDD = 3V typical (Range: 2.7V to 3.6V) DVDD = 1.8V typical (Range: 1.65V to 3.6V) |
AVDD = 5V typical (Range: 3V to 5.5V) DVDD = 3V typical (Range: 1.65V to 5.5V) |
AVDD = 5V typical (Range: 2.85V to 5.5V) DVDD = 3V typical (Range: 1.65V to 5.5V) |
| REF Range | 4.096V | 2.5V to 5V | 2.5V to AVDD-0.3V | AVDD |
| REF device | Internal | REF7050 | REF7050 | REF7050 |
| Front-end op-amp | THS4552 | THS4551 × 2 | THS4551 × 2 | THS4551 × 2 |
| Front-end op-amp supply | 2.7V to 5.4V | 2.7V to 5.4V | 2.7V to 5.4V | 2.7V to 5.4V |
| ADC Size & Package | 32-pin VQFN (5mmX5mm) | 10-pin VSON
(3mmX3mm) OR 10-pin VSSOP (3mmX3mm) |
24-pin VQFN (4mmX4mm) | 20-pin QFN (3mmX3mm) |
| No. of active components | 2 | 5 | 5 | 5 |
| SNR (from data sheet) | 94dB | 100dB | 104.5dB | 110dB |
| Noise(uV) | 8.207 | 8.286 | 7.030 | 5.903 |