Analog Microelectronics, Inc.

3

AME811/AME811A/AME811R

3-1/2 Digit A/D Converter - Low Power

With HOLD And Differential Reference Inputs

Notes: 1. Input voltage may exceed the supply voltages provided the input current is limited to

±100µA.

2. Dissipation rating assumes a device is mounted with all leads soldered to printed circuit board.

Parameter

Conditions

Min

Typ

Max

Unit

Vin = 0V

-0

w 0

+0 Digital Reading

Full-Scale = 200.0mV

Ratiometric Reading

Vin = Vref = 100.0mV

999 999/1000 1000 Digital Reading

Roll-Over Error

(Difference in Reading for

Equal Positive and Negative

Reading Near Full-Scale)

Linearity (Max. Deviation

From Best Straight Line Fit)

Common-Mode

Vcm = –1V, Vin =0V

Rejection Ratio

Full-Scale = 200.0mV

Noise (Pk-Pk Value Not

Vin = 0V

Exceeded 95% of Time)

Full-Scale = 200.0mV

Leakage Current at Input

Vin = 0V

1

10

pA

Zero Reading Drift

Vin = 0V, 0

o

C to 70

o

C0.2

1

µV/

o

C

Analog Common Voltage

25K

Ω Between

(With respect to V+)

Common and V+

Temp. Coeff. of Analog

25K

Ω Between

Common (With respect to V+) Common and V+

0

o

o

C

Low Battery Flag

V+ to V-

6.3

7.0

7.7

V

Test Pin Voltage

With respect to V+

4

5

6

V

LCD Segment Drive Voltage

V+ to V- = 9V

4

5

6

V

Backplane Drive Voltage

V+ to V- = 9V

4

5

6

V

Counts

+1

–0.2

-1

µV

µV/V

-1

–0.2

+1

Counts

50

V

50

75

ppm/

Zero Input Reading

2.8

3

3.2

15

-Vin = +Vin

≈ 200.0mV

Full-Scale = 200.0mV

Unless otherwise noted, AME811 is specified at TA = 25

o

C, fclock = 48KHz. Supply voltage = 9V (V+ to V-)

n

n

n

n