CY8CKIT-059 datasheet(94/140 Pages) INFINEON

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Document Number: 001-84932 Rev. *N

Page 93 of 139

PSoC® 5LP: CY8C58LP Family

Datasheet

11.5.3 Voltage Reference

Figure 11-39. Vref vs Temperature

Figure 11-40. Vref Long-term Drift

Table 11-27. Voltage Reference Specifications

See ADC external reference specifications in Delta-Sigma ADC on page 88.

Parameter

Description

Conditions

Min

Typ

Max

Units

VREF[50]

Precision reference voltage

Initial trimming, 25 °C

1.023

(–0.1%)

1.024

1.025

(+0.1%)

After typical PCB assembly,

post reflow

Typical (non-optimized) board

layout and 250 °C solder reflow.

Device may be calibrated after

assembly to improve performance.

–40 °C

–

±0.5

–

25 °C

–

±0.2

–

85 °C

–

±0.2

–

105 °C

–

±0.3

–

Temperature drift[51]

––

ppm/°C

Long term drift[51]

–

100

–

ppm/Khr

Thermal cycling drift

(stability)[51]

–

100

–

ppm

1024

1024.5

1025

1023

1023.5

1024

-40

-20

100

Temperature, °C

1.95V

1.8V

1.71V

Notes

50. VREF is measured after packaging, and thus accounts for substrate and die attach stresses.

51. Based on device characterization (Not production tested).

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