43.17 ADC Electrical Specifications
AC Characteristics | Standard Operating Conditions: VDD = 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp -40°C ≤ TA ≤ +125°C for Extended Temp | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
Device Supply | |||||||
ADC_1 | AVDD | ADC module supply | AVDD(min) | — | AVDD(max) | V | — |
Reference Inputs | |||||||
ADC_2 | VREF(4) | Absolute reference voltage (VREFH-VREFL) (4) | AVSS-0.3 | — | AVDD+0.3 | V | — |
ADC_3 | VREF | Reference voltage high (external reference buffers) | AVSS+1.8 | — | AVDD | V | — |
ADC_4 | VREFL | Reference voltage low (external reference buffers) | AVSS | — | AVDD-1.8 | V | — |
ADC_4a | RREF | Suggested VREF impedance | — | — | 25 | Ω | Resistance from source to the VREFP/VREFM input, including RSource, PCB trace, pads and on-chip routing |
ADC_4b | VCM | Analog input Common mode voltage | AVSS + VREF/2 | — | AVDD - VREF/2 | V | — |
ADC_4c | VDIFF | Differential analog input voltage (seldiff = 1) (VINP - VINN) | 2*(VREFH - VREFL) | V | — | ||
ADC_4d | VSING | Single-ended analog input voltage (seldiff = 0) (VINP - VINN) | VREFL | — | VREFH | — | — |
ADC_4e | RIN_INT | ADC internal resistance | — | — | 200 | Ω | Internal sampling switch resistance |
ADC_4f | RIN_SYS | External input resistance to meet the maximum speed | — | — | 125 | Ω | Resistance from VINP/VINM to signal source. Include RSource + RPad + RPCB + Rroute |
ADC_4g | RSRC | Maximum source impedance to meet 2 MSPS at 12-bit | — | — | 500 | Ω | — |
Maximum source impedance to meet 1 MSPS at 12-bit | — | — | 1400 | Ω | — | ||
Analog Input Range | |||||||
ADC_7 | AFS | Full-scale analog input signal range (Single-ended) | AVSS | — | VREF | V | VREF = AVDD(max) |
ADC_11 | TSETTLING | ADC stabilization time | — | 10 | — | µs | — |
AC Characteristics | Standard Operating Conditions: VDD = 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp -40°C ≤ TA ≤ +125°C for Extended Temp | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typical | Max. | Units | Conditions |
Single-Ended Mode ADC Accuracy | |||||||
SADC_11 | Res | Resolution | 6 | — | 12 | bits | Selectable 8-, 10-, 12-bit resolution ranges |
SADC_13 | EN0B(3) | Effective number of bits | 6.3 | — | — | bits | 2 Msps, Internal VREF, AVDD = VDDIO = 3.3V |
SADC_19 | INL(3) | Integral non linearity | -13.737 | — | 2.869 | LSb | 2 Msps, Internal VREF, AVDD = VDDIO = 3.3V |
SADC_25 | DNL(3) | Differential non linearity | -1.628 | — | 1.736 | LSb | 2 Msps, Internal VREF, AVDD = VDDIO = 3.3V |
SADC_31 | GERR(3) | Gain error | -8.198 | — | -4.697 | LSb | 2 Msps, Internal VREF, AVDD = VDDIO = 3.3V |
SADC_37 | E0FF(3) | Offset error | 4.905 | — | 25.094 | LSb | 2 Msps, Internal VREF, AVDD = VDDIO = 3.3V |
Single-Ended Mode ADC Dynamic Performance | |||||||
SADC_49 | SINAD(1,2,3) | Signal to noise and distortion | 39.728 | — | — | dB | VREF = AVDD = VDDIO = 3.3V at 12-bit resolution, max sampling rate(1,2) |
SADC_51 | SNR(1,2,3) | Signal to noise ratio | 39.747 | — | — | ||
SADC_53 | SFDR(1,2,3) | Spurious free dynamic range | 61.32 | — | — | ||
SADC_55 | THD(1,2,3) | Total harmonic distortion | — | — | -59.346 | ||
Note:
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AC Characteristics | Standard Operating Conditions: VDD = 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp -40°C ≤ TA ≤ +125°C for Extended Temp | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
ADC_ Clock Requirements | |||||||
ADC_57 | TAD | ADC clock period | — | 20.8 | — | ns | VREF = AVDD = 3.3V |
ADC Single-Ended Throughput Rates | |||||||
ADC_59 | FTPR (Single-ended mode) | Throughput rate(4) (Single-ended) | 0.01 | — | 2 | Msps | 12-bit resolution, DIV_SHR = 2 |
Note:
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AC Characteristics | Standard Operating Conditions: VDD = 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ TA ≤ +85°C for Industrial Temp -40°C ≤ TA ≤ +125°C for Extended Temp | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
ADC_63 | TSAMP | ADC sample time (1,2,3,5) | 1(1,5) | — | — | TAD | 12-bit TAD(min), Ext Analog Input Rsource ≤ 147Ω |
10-bit TAD(min), Ext Analog Input Rsource ≤ 504Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 1,000Ω | |||||||
2(1,5) | — | — | 12-bit TAD(min), Ext Analog Input Rsource ≤ 2,272Ω | ||||
10-bit TAD(min), Ext Analog Input Rsource ≤ 3,008Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 4,000Ω | |||||||
3(1,5) | — | — | 12-bit TAD(min), Ext Analog Input Rsource ≤ 4,416Ω | ||||
10-bit TAD(min), Ext Analog Input Rsource ≤ 5,504Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 6,976Ω | |||||||
4(1,2,5) | — | — | 12-bit TAD(min), Ext Analog Input Rsource ≤ 6,560Ω | ||||
10-bit TAD(min), Ext Analog Input Rsource ≤ 8,000Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 9,984Ω | |||||||
5(1,5) | — | — | 12-bit TAD(min), Ext Analog Input Rsource ≤ 8,704 Ω | ||||
10-bit TAD(min), Ext Analog Input Rsource ≤ 10,496Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 12,992Ω | |||||||
6(1,5,6) | — | — | 12-bit TAD(min), Ext Analog Input Rsource ≤ 10,880Ω | ||||
10-bit TAD(min), Ext Analog Input Rsource ≤ 12,992Ω | |||||||
8-bit TAD(min), Ext Analog Input Rsource ≤ 16,000Ω | |||||||
— | — | — | ns | With DAC as input | |||
— | — | — | With temperature sensor as input | ||||
ADC_65 | TCNV | Conversion time (3) (Single-Ended mode) | 12 | TAD | 12-bit resolution | ||
11 | 10-bit resolution | ||||||
9 | 8-bit resolution | ||||||
Note:
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