Epson S1C33210 manual 86

8 ELECTRICAL CHARACTERISTICS

8.5 A/D Converter Characteristics

(Unless otherwise specified: AVDD=VDD=2.7V to 3.6V, VSS=0V, Ta=-40°C to +85° C, ST[1:0]=11)

Item	Symbol	Condition	Min.	Typ.	Max.	Unit	∗
Resolution	–		–	10	–	bit
Conversion time	–		10	–	625	∝ s	1
Zero scale error	EZS		0	2	4	LSB
Full scale error	EFS		-2	–	2	LSB
Integral linearity error	EL		-3	–	3	LSB
Differential linearity error	ED		-3	–	3	LSB
Permissible signal source impedance	–		–	–	5	kΩ
Analog input capacitance	–		–	–	45	pF

∗note 1) Indicates the minimum value when A/D clock = 2MHz (maximum clock frequency in 3V system). Indicates the maximum value when A/D clock = 32 kHz (minimum clock frequency in 3V system).

Note: • Be sure to use as VDD = AVDD.

• The A/D converter cannot be used when the S1C33210 is used with a 2V power source.

A/D conversion error

V[000]h = Ideal voltage at zero-scale point (=0.5LSB)	1LSB =	AVDD - VSS
V'[000]h = Actual voltage at zero-scale point		210 - 1
V[3FF]h = Ideal voltage at full-scale point (=1022.5LSB)	1LSB' =V'[3FF]h - V'[000]h
V'[3FF]h = Actual voltage at full-scale point
		210 - 2

Zero scale error

Digital output (hex)

004
003				Ideal conversion characteristic
	V[000]h			Actual conversion characteristic
002	(=0.5LSB)
						(V'[000]h - 0.5LSB') - (V[000]h - 0.5LSB)
					Zero scale error EZS =		[LSB]
001						1LSB
		V'[000]h
000
VSS			Analog input

Full scale error

Digital output (hex)

3FF

3FE

3FD

3FC

3FB

V'[3FF]h V[3FF]h (=1022.5LSB)

(V'[3FF]h + 0.5LSB') - (V[3FF]h + 0.5LSB)

Full scale error EFS =[LSB] 1LSB

Actual conversion characteristic

Ideal conversion characteristic

AVDD

Analog input

A-72 EPSON S1C33210 PRODUCT PART