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CS5505
(Rev.:2009)

Very Low Power, 16-Bit & 20-Bit A/D Converters

Cirrus Logic 

CS5505/6/7/8

CS5505/6/7/8

RECOMMENDED OPERATING CONDITIONS (DGND = 0V) (Note 19)

Parameter

Symbol

Min

Typ

Max

Units

DC Power Supplies: Positive Digital

VD+

(VA+)-(VA-)

Vdiff

Positive Analog

VA+

Negative Analog

VA-

3.15

5.0

5.5

V

4.75

10

11

V

4.5

5.0

11

V

0

-5.0

-5.5

V

Analog Reference Voltage (Note 20) (VREF+)-(VREF-)

1.0

2.5

3.6

V

Analog Input Voltage:

(Note 21)

Unipolar

Bipolar

VAIN

VAIN

0

- (VREF+)-(VREF-) V

-((VREF+)-(VREF-)) - +((VREF+)-(VREF-)) V

Notes: 19. All voltages with r espect to ground.

20. The CS5505/6/7/8 can be operated with a reference voltage as low as 100 mV; but with a

corresponding reduction in nois e-free resolution. The common mode voltage of the voltage reference

may be any value as long as +V REF and -VREF remain inside the supply values of VA+ and VA-.

21. The CS5505/6/7/8 can acc ept input voltages up to the analog suppl ies (VA+ and VA-). In unipolar

mode the CS5505/6/7/8 wil l output all 1’s if the dc input magnitude ( (AIN+)-(AIN-)) exceeds

((VREF+)-(VREF-)) and will output all 0’s if the input becomes more negative than 0 Volts.

In bipolar mode the CS5505/6/7/8 will output all 1’s if the dc input magnitude ((AIN+)-(AIN-)) exceeds

((VREF+)-(VREF-)) and will output all 0’s if the input becomes more negative in magnitude than

-((VREF+)-(VREF-)).

ABSOLUTE MAXIMUM RATINGS*

Parameter

Symbol Min

Typ

Max Units

DC Power Supplies:

Digital Ground

Positive Digital

Positive Analog

Negative Analog

(VA+)-(VA-)

(VA+)-(VD+)

(Note 22)

(Note 23)

DGND

VD+

VA+

VA-

Vdiff1

Vdiff2

-0.3

-0.3

-0.3

+0.3

-0.3

-0.3

-

(VD+)-0.3 V

- 6.0 or VA+ V

-

12.0

V

-

-6.0

V

-

12.0

V

-

12.0

V

Input Current, Any Pin Except Supplies

(Notes 24, 25) Iin

-

-

±10

mA

Analog Input Voltage

AIN and VREF pins

VINA (VA-)-0.3 - (VA+)+0.3 V

Digital Input Voltage

VIND

-0.3

- (VD+)+0.3 V

Ambient Operating Temperature

TA

-55

-

125

°C

Storage Temperature

Tstg

-65

-

150

°C

Notes: 22. No pin should go more positive than (VA+)+0.3V.

23. VD+ must always be less than (VA+)+0.3 V,and can never exceed 6.0V.

24. Applies to all pins including continuous overvoltage conditions at the analog input (AIN) pin.

25. Transient currents of up to 100mA will not cause SCR latch-up. Maximum input current for a power

supply pin is ± 50 mA.

* WARNING: Operation at or beyond these limits may r esult in per manent damage to the device.

Normal operation is not guaranteed at these extremes.

1122

DS59F74

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