SMM764

Preliminary Information

Summit Microelectronics, Inc

2098 1.1 6/29/2005

10

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

VREF input current

250

nA

VREF input capacitance

200

pF

VREF input impedance

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