SAFC161RI datasheet(41/60 Pages) SIEMENS

41 / 60 page

Semiconductor Group

1998-05-01

C161RI

A/D Converter Characteristics

DD = 4.5 - 5.5 V;

SS = 0 V

A = 0 to + 70 °C

for SAB-C161RI

A = – 40 to + 85 °C

for SAF-C161RI

4.0 V

≤ V

AREF ≤ VDD + 0.1 V; VSS - 0.1 V ≤ VAGND ≤ VSS + 0.2 V

The conversion time of the C161RI’s A/D Converter is programmable. The table below should be

used to calculate the above timings.

The limit values for

BC must not be exceeded when selecting ADCTC.

Converter Timing Example:

Assumptions:

CPU

= 16 MHz (i.e.

CPU = 62.5 ns), ADCTC = ‘01’.

Basic clock

CPU / 4 = 4 MHz, i.e. tBC = 250 ns.

Sample time

BC × 6 = 1500 ns.

Conversion time

= 30

BC + 2 tCPU = (7500 + 125) ns = 7.625 µs.

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

max.

Analog input voltage range

AIN

AGND

AREF

Basic clock frequency

0.5

MHz

Sample time

CC –

BC = 1 / fBC

Conversion time

CC –

+ 2

CPU

CPU = 1 / fCPU

Total unadjusted error

TUE CC –

± 2LSB 4)

Internal resistance of reference

voltage source

AREF SR

–

BC / 125

- 0.25

Ω

BC in [ns]

5) 6)

Internal resistance of analog

source

ASRC SR

–

S / 750

- 0.25

Ω

S in [ns]

6) 7)

ADC input capacitance

AIN

CC –

ADCON.15|14

(ADCTC)

A/D Converter Basic Clock

CPU / 2

CPU / 4

CPU / 8

CPU / 16

SAFC161RI Datasheet(PDF) 41 Page - Siemens Semiconductor Group

SAFC161RI Datasheet(HTML) 41 Page - Siemens Semiconductor Group

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL