LPC1763 datasheet(65/79 Pages) NXP

65 / 79 page

LPC1769_68_67_66_65_64_63

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Product data sheet

Rev. 7 — 5 April 2011

65 of 79

NXP Semiconductors

LPC1769/68/67/66/65/64/63

32-bit ARM Cortex-M3 microcontroller

13. DAC electrical characteristics

Remark: The DAC is available on parts LPC1769/68/67/66/65/63. See Table 2.

The values of resistor components Ri1 and Ri2 vary with temperature and input voltage and are

process-dependent (see Table 20).

Parasitic resistance and capacitance from the pad are not included in this figure.

Fig 27. ADC interface to pins AD0[n]

Table 20.

ADC interface components

Component

Range

Description

Ri1

2 k

Ω to 5.2 kΩ

Switch-on resistance for channel selection switch. Varies with

temperature, input voltage, and process.

Ri2

100

Ω to 600 Ω

Switch-on resistance for the comparator input switch. Varies

with temperature, input voltage, and process.

750 fF

Parasitic capacitance from the ADC block level.

65 fF

Parasitic capacitance from the ADC block level.

2.2 pF

Sampling capacitor.

LPC17xx

AD0[n]

750 fF

65 fF

Cia

2.2 pF

Rvsi

Ri2

100

Ω - 600 Ω

Ri1

2 k

Ω - 5.2 kΩ

VSS

VEXT

002aaf197

ADC

COMPARATOR

BLOCK

Table 21.

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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