ADC0816, ADC0817

SNAS527C – JUNE 1999 – REVISED MARCH 2013

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Electrical Characteristics

otherwise stated.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

ADC0816

Total Unadjusted Error

25°C

±½

LSB

±¾

LSB

ADC0817

Total Unadjusted Error

0°C to 70°C

±1

LSB

±1¼

LSB

Input Resistance

From Ref(+)to Ref(

−)

1.0

4.5

k

Ω

Analog Input Voltage Range

V(+) or V(

GND

− 0.1

Voltage, Top of Ladder

Measured at Ref(+)

V

V

Voltage, Center of Ladder

Voltage, Bottom of Ladder

Measured at Ref(

−)

−0.1

0

V

Comparator Input Current

(3)

−2

±0.5

2

µA

(1)

Total unadjusted error includes offset, full-scale, and linearity errors. See Figure 3. None of these A/Ds requires a zero or full-scale

adjust. However, if an all zero code is desired for an analog input other than 0.0V,or if a narrow full-scale span exists (for example: 0.5V

to 4.5V full-scale)the reference voltages can be adjusted to achieve this. See Figure 13.

(2)

Two on-chip diodes are tied to each analog input which will forward conduct for analog input voltages one diode drop below ground or

loading.

(3)

Comparator input current is a bias current into or out of the chopper stabilized comparator. The bias current varies directly with clock

frequency and has little temperature dependence (Figure 6).

4

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