SMM665B

Preliminary Information

Summit Microelectronics, Inc

2089 1.1 10/20/04

9

DC OPERATING CHARACTERISTICS (CONTINUED)

(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.)

AIN1/AIN2 ADC characteristics

Symbol

Parameter

Notes

Min

Typ

Max

Unit

N

Resolution

10

Bits

MC

Missing Codes

Minimum resolution for which no

missing codes are guaranteed

10

Bits

S/N

Signal-to-Noise Ratio

Conversion rate = 500Hz

72

db

DNL

Differential Non-Linearity

-1/2

+1/2

LSB

INL

Integral Non-Linearity

Note 1

-1

+1

LSB

GAIN

Positive full scale gain error

Note 1

-0.5

+0.5

%

Offset

Offset Error

Note 1

-1

+1

LSB

ADC_TC

Full Scale Temperature

Coefficient

±15

PPM/

Analog ADC Input Impedance

10

M

Ω

250

nA

200

pF

1

k

Ω

Note 1 - The formula for the total ADC inaccuracy is: [((ADC read voltage) +/- INL)*(range of gain error)]+range of offset error