CS551 Просмотр технического описания (PDF) - Cirrus Logic

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CS551

16/20-bit bridge transducer A/D conveter

Cirrus Logic 

CS5516, CS5520

RECOMMENDED OPERATING CONDITIONS (AGND, DGND = 0V, see Note 12.)

Parameter

Symbol

Min

Typ

Max Units

DC Power Supplies:

Positive Digital

Negative Digital

Positive Analog

Negative Analog

VD+

VD-

VA+

VA-

4.5

5.0

5.5

V

-4.5

-5.0

-5.5

V

4.5

5.0

5.5

V

-4.5

-5.0

-5.5

V

Differential Analog Reference Voltage

(VREF+) - (VREF-) 2.0

2.5

3.8

V

Analog Input Voltage:

(Note 13)

Unipolar

Bipolar

VAIN

VAIN

0

-

+T

V

-T

-

+T

V

Notes: 12. All voltages with respect to ground.

13. The CS5516 and CS5520 can accept input voltages up to +T in unipolar mode and -T to +T in bipolar

mode where T=VREF/(Gx25). G is the gain setting at the second gain block. When the inputs exceed

these values, the CS5516 and CS5520 will output positive full scale for any input above T, and

negative full scale for inputs below AGND in unipolar and -T in bipolar mode. This applies when the

analog input does not exceed ±2T overrange.

ABSOLUTE MAXIMUM RATINGS* (AGND, DGND = 0V, all voltages with respect to ground.)

Parameter

Symbol Min

Typ

Max Units

DC Power Supplies:

Positive Digital

(Note 14) VD+

-0.3

Negative Digital

VD-

-0.3

Positive Analog

VA+

-0.3

Negative Analog

VA-

+0.3

- (VA+)+0.3 V

-

-5.5

V

-

5.5

V

-

-5.5

V

Input Current, Any Pin Except Supplies

(Notes 15, 16) lin

-

-

±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: 14. No pin should go more positive than (VA+)+0.3V. VD+ must always be less than (VA+)+0.3 V,and

can never exceed 6.0V.

15. Applies to all pins including continuous overvoltage conditions at the analog input pins.

16. 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 beyond these limits may result in permanent damage to the device.

Normal operation is not guaranteed at these extremes.

DS74F21

7

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