MCP48CMB21 datasheet(101/106 Pages) MICROCHIP

Part #	MCP48CMB21

Description	8/10/12-Bit Digital-to-Analog Converters, 1 LSb INL Single/Dual Voltage Outputs with SPI Interface

PDF	106 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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101 / 106 page

 2019 Microchip Technology Inc.

DS20006160A-page 101

MCP48CXBXX

B.18

Power-Supply Rejection Ratio

(PSRR)

PSRR indicates how the output of the DAC is affected

by changes in the supply voltage. PSRR is the ratio of

the change in VOUT to a change in VDD for full-scale

output of the DAC. The VOUT is measured while the

VDD is varied +/-10% (VREF voltage held constant) and

expressed in dB or µV/V.

B.19

VOUT Temperature Coefficient

The VOUT temperature coefficient quantifies the error in

the resistor ladder’s resistance ratio (DAC register

code value) and Output Buffer due to temperature drift.

B.20

Absolute Temperature Coefficient

The absolute temperature coefficient quantifies the

error in the end-to-end output voltage (Nominal output

voltage VOUT) due to temperature drift. For a DAC, this

error is typically not an issue due to the ratiometric

aspect of the output.

B.21

Noise Spectral Density

The noise spectral density is a measurement of the

device’s internally generated random noise, and is

characterized as a spectral density (voltage per √Hz).

It is measured by loading the DAC to the mid-scale

value and measuring the noise at the VOUT pin. It is

measured in nV/√Hz.

MCP48CMB21 Datasheet(PDF) 101 Page - Microchip Technology