AD8488

Data Sheet

Rev. A | Page 4 of 20

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

OUTPUT VOLTAGE

OUTHIGH

2.0

V

OUTLOW

2.0

V

INPUT REFERRED NOISE4

CF1 = 0.9 pF, G = 10

Normal

CPANEL = 38 pF

993

e−rms

Low Power

CPANEL = 61 pF

2000

e−rms

PANEL CAPACITANCE

0

80

pF

LINEARITY ERROR5

CF1 = 0.9 pF, G = 5

Normal

0.03 + 1

% + LSB

Low Power

0.2 + 8.2

% + LSB

OPERATING TEMPERATURE

Ambient, normal and low power

0

85

°C

1

Defined as the output voltage divided by the input charge (number of electrons in this case) with the gain amp setting (G = 1). This includes the gain error of the gain amp.

2

Each gain at G = 2, G = 4, G = 8, and G = 10 is calculated as the ratio of each output voltage to that at G = 1. Each measurement corresponds to the selection of each gain

setting capacitor.

3

Gain deviation over temperature.

4

The output noise voltage is measured and converted into the input referred noise electrons.

5

It is defined as the deviation from a best fit line, including the origin. The output voltage is measured with five different input conditions.