MCP3461 datasheet(13/108 Pages) MICROCHIP

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DS20006180D-page 13

MCP3461/2/4

2.0

TYPICAL PERFORMANCE CURVES

Note: Unless otherwise indicated, AVDD =3.3V, DVDD =3.3V, TA = +25°C, MCLK = 4.9152 MHz, VIN = -0.5 dBFS at

50 Hz, VREF =AVDD, ADC_MODE = 11. All other registers are set to default value. Histogram ticks are centered at their

bin center.

FIGURE 2-1:

Output Spectrum (50 Hz

Input).

FIGURE 2-2:

Output Spectrum (1 kHz

Input).

FIGURE 2-3:

Output Noise Histogram.

FIGURE 2-4:

INL vs. Input Voltage.

FIGURE 2-5:

Output Noise vs. Input

Voltage.

FIGURE 2-6:

Maximum INL vs. Gain.

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

-180

-160

-140

-120

-100

-80

-60

-40

-20

500

1000

1500

2000

2500

Frequency (Hz)

IN = -0.5 dBFS @ 50 Hz

FFT 16384 samples

-180

-160

-140

-120

-100

-80

-60

-40

-20

500

1000

1500

2000

2500

Frequency (Hz)

IN = -0.5 dBFS @ 1 kHz

FFT 16384 samples

10000

20000

30000

40000

50000

60000

70000

-10

-9-8-7-6-5-4-3-2-10

ADC Output Code (LS )

VIN = 0V

CONV_MODE[1:0] = 11

64000 samples

Bin size = 1 LS

Histograms may show up

to 2 bins equally

distributed if offset is close

to a round LS value

(Intrinsic noise << 16-bit

quantization noise)

-6

-4

-2

-100

-50

100

Differential Input Voltage (% of V

REF)

AVDD=VREF=2.7V, -40°C

AVDD=VREF=2.7V, +125°C

AVDD=VREF=3.6V, -40°C

AVDD=VREF=3.6V, +125°C

Gain = 1x

0.5

1.5

2.5

3.5

4.5

-100

-50

100

Differential Input Voltage (% of V

REF)

AVDD=VREF=2.7V, -40°C

AVDD=VREF=2.7V, +125°C

AVDD=VREF=3.6V, -40°C

AVDD=VREF=3.6V, +125°C

Gain = 1x

Intrinsic noise means before

16-bit Rounding/quantization

0.25

0.5

Analog Gain

AVDD=VREF=2.7V, -40°C

AVDD=VREF=2.7V, +125°C

AVDD=VREF=3.6V, -40°C

AVDD=VREF=3.6V, +125°C

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