LPC4088 datasheet(97/123 Pages) NXP

97 / 123 page

LPC408X_7X

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Objective data sheet

Rev. 1 — 17 September 2012

97 of 123

NXP Semiconductors

LPC408x/7x

32-bit ARM Cortex-M4 microcontroller

12.2 DAC electrical characteristics

12.3 Comparator electrical characteristics

The values of resistor components Rcmp and Rsw vary with temperature and input voltage and are

process-dependent.

Fig 30. ADC interface to pins ADC0_IN[n]

Table 28.

ADC interface components

Component

Range

Description

Rcmp

 to 300 

Switch-on resistance for the comparator input switch. Varies

with temperature, input voltage, and process.

Rsw

500

 to 2 k

Switch-on resistance for channel selection switch. Varies with

temperature, input voltage, and process.

110 fF

Parasitic capacitance from the ADC block level.

80 fF

Parasitic capacitance from the ADC block level.

1.6 pF

Sampling capacitor.

LPC408x/7x

AD0[n]

110 fF

80 fF

Cia

1.6 pF

Rvsi

Rsw

500

Ω - 2 kΩ

Rcmp

Ω - 300 Ω

VSS

VEXT

002aah275

ADC

COMPARATOR

BLOCK

Table 29.

10-bit DAC electrical characteristics

VDDA = 2.7 V to 3.6 V; Tamb = 40 C to +85 C unless otherwise specified

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

differential linearity

error

1-

LSB

EL(adj)

integral non-linearity

1.5

LSB

offset error

0.6

gain error

0.6

load capacitance

200

load resistance



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