MCP33131 datasheet(5/54 Pages) MICROCHIP

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 2018 Microchip Technology Inc.

DS20006122A-page 5

MCP33131/MCP33121/MCP33111-XX

Dynamic Performance

Signal-to-Noise Ratio

SNR

MCP33131-10 and MCP33131-05: 16-bit ADC

—86.8

—

dBFS

VREF = 5V, fIN = 1 kHz

—80.9

—

VREF = 2.5V, fIN = 1 kHz

83.5

86.7

—

VREF = 5V, fIN = 10 kHz

—80.9

—

VREF = 2.5V, fIN = 10 kHz

MCP33121-10 and MCP33121-05: 14-bit ADC

—83.6

—

dBFS

VREF = 5V, fIN = 1 kHz

—79.8

—

VREF = 2.5V, fIN = 1 kHz

81.5

83.5

—

VREF = 5V, fIN = 10 kHz

—79.8

—

VREF = 2.5V, fIN = 10 kHz

MCP33111-10 and MCP33111-05: 12-bit ADC

—73.8

—

dBFS

VREF = 5V, fIN = 1 kHz

—73.2

—

VREF = 2.5V, fIN = 1 kHz

71.1

73.8

—

VREF = 5V, fIN = 10 kHz

—73.2

—

VREF = 2.5V, fIN = 10 kHz

Signal-to-Noise and Distortion Ratio

(Note 5)

SINAD

MCP33131-10 and MCP33131-05: 16-bit ADC

—86.9

—

dBFS

VREF = 5V, fIN = 1 kHz

—80.9

—

VREF = 2.5V, fIN = 1 kHz

—86.6

—

VREF = 5V, fIN = 10 kHz

—80

—

VREF = 2.5V, fIN = 10 kHz

MCP33121-10 and MCP33121-05: 14-bit ADC

—83.6

—

dBFS

VREF = 5V, fIN = 1 kHz

—79.8

—

VREF = 2.5V, fIN = 1 kHz

—83.4

—

VREF = 5V, fIN = 10 kHz

—79.1

—

VREF = 2.5V, fIN = 10 kHz

MCP33111-10 and MCP33111-05: 12-bit ADC

—73.8

—

dBFS

VREF = 5V, fIN = 1 kHz

—73.2

—

VREF = 2.5V, fIN = 1 kHz

—73.8

—

VREF = 5V, fIN = 10 kHz

—73

—

VREF = 2.5V, fIN = 10 kHz

TABLE 1-1:

KEY ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all parameters apply for TA = -40°C to +125°C, AVDD = 1.8V, DVIO = 3.3V, VREF =5V,

GND = 0V, Analog Input (VIN) = -1 dBFS sine wave, fIN =10 kHz, CLOAD_SDO = 20 pF.

• MCP331x1-10: Sample Rate (fS) = 1 Msps, SPI Clock Input (SCLK) = 60 MHz.

• MCP331x1-05: Sample Rate (fS) = 500 kSPS, SPI Clock Input (SCLK) = 30 MHz.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Note

1: This parameter is ensured by design and not 100% tested.

2: This parameter is ensured by characterization and not 100% tested.

3: Decoupling capacitor is recommended on the following pins:

(a) AVDD pin: 1 F ceramic capacitor, (b) DVIO pin: 0.1 F ceramic capacitor, (c) VREF pin: 10 F tantalum capacitor.

4: PSRR (dB) = -20 log (DVOUT/AVDD), where DVOUT = change in conversion result.

5: ENOB = (SINAD - 1.76)/6.02

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