37.15 ADC
Operating conditions:
- VDD=5V
- Temperature 25°C
- SAMPCAP is 10pF for 0.55V reference, while it is set to 5pF for VREF≥1.1V
| Symbol | Description | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| VDD | Supply Voltage | 1.8 | - | 5.5 | V | |
| VREF | Reference Voltage | REFSEL = Internal reference | 0.55 | - | VDD-0.5V | V |
| REFSEL = VDD | 1.8 | - | 5.5 | |||
| REFSEL = External reference | 1.1 | - | VDD | |||
| RIN | Input resistance | - | TBD | - | kΩ | |
| CIN | Input capacitance | SAMPCAP=5pF | - | 5 | - | pF |
| SAMPCAP=10pF | - | 10 | - | |||
| VIN | Input Voltage Range | 0 | - | VREF | V | |
| IBAND | Input Bandwidth | 1.1V≤VREF | - | - | 57.5 | kHz |
| Symbol | Description | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| RS | Sample Rate | 1.1V≤VREF | 15 | - | 115 | ksps |
| 1.1V≤VREF (8 bit resolution) | 15 | - | 150 | |||
| VREF=0.55V (10 bit) | 7.5 | - | 20 | |||
| fCLK_ADC | ADC clock frequency | VREF=0.55V (10 bit) | 100 | - | 260 | kHz |
| 1.1V≤VREF (10 bit) | 200 | - | 1500 | |||
| 1.1V≤VREF (8 bit resolution) | 200 | - | 2000 | |||
| Ts | Sampling time | 2 | 2 | 33 | CLKADC cycles | |
| TCONV | Conversion time (latency) | Sampling time = 2CLKADC | 8.7 | - | 50 | µs |
| TSTART | Startup-time | Internal Vref used | - | 22 | - | µs |
| Symbol | Description | Conditions | Min. | Typ. | Max. | Unit | |
|---|---|---|---|---|---|---|---|
| Res | Resolution | - | 10 | - | bit | ||
| INL | Integral Non Linearity | REFSEL = Internal reference or VDD | 0.55V≤VREF≤VddfADC=15ksps | - | 1.0 | - | LSB |
| 1.1V≤VREF≤2.5fADC=115ksps | - | 1.0 | - | ||||
| 2.5V<VREF≤VddfADC=115ksps | - | 1.3 | - | ||||
| REFSEL = External reference | VREF= 1.8VfADC=15ksps | - | 0.9 | - | |||
| VREF= 4.096VfADC=15ksps | - | 0.9 | - | ||||
| VREF= 1.8VfADC=115ksps | - | 1.0 | - | ||||
| VREF= 4.096VfADC=115ksps | - | 1.3 | - | ||||
| DNL(1) | Dynamic Non Linearity | REFSEL = Internal reference or VDD | VREF=0.55VfADC=15ksps | - | 0.4 | - | LSB |
| 1.1V≤VREF≤VddfADC=15ksps | - | 0.3 | - | ||||
| 1.1V≤VREF≤2.5VfADC=115ksps | - | 0.4 | - | ||||
| 2.5V≤VREF≤VddfADC=115ksps | - | 0.7 | - | ||||
| REFSEL = External reference | VREF= 1.8VfADC=15ksps | - | 0.2 | - | |||
| VREF= 4.096VfADC=15ksps | - | 0.2 | - | ||||
| VREF= 1.8VfADC=115ksps | - | 0.4 | - | ||||
| VREF= 4.096VfADC=115ksps | - | 0.6 | - | ||||
| EABS | Absolute Accuracy | REFSEL = Internal reference or VDD | 0.55V≤VREF ≤1.1VfADC=15ksps | - | 3 | - | LSB |
| VREF = 1.1VfADC≤115ksps | - | 3 | - | ||||
| 1.5V≤VREF ≤4.3VfADC≤115ksps | - | 2.5 | - | ||||
| VREF=VDDfADC≤115ksps | - | 2 | - | ||||
| REFSEL = External reference | fADC ≤115ksps | - | 2 | - | |||
| EGAIN | Gain Error | REFSEL = Internal reference or VDD | VREF=1.1VfADC = 115ksps | - | 2±2.5 | - | LSB |
| VREF=VDD fADC = 115ksps | - | 2 | - | ||||
| REFSEL = External reference | VREF=1.8VfADC ≤ 115ksps | - | 1.2 | - | |||
| VREF=4.096VfADC ≤ 115ksps | - | 1.0 | - | ||||
| EOFF | Offset Error | REFSEL = Internal reference or VDD | - | -0.5 | - | LSB | |
| REFSEL = External reference | - | -0.4 | - | ||||
Note:
- A DNL error of less than or equal to 1LSB guarantees a monotonic transfer function with no missing codes.