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CS5373A

Low-power, High-performance ∆Σ Modulator and Test DAC

Cirrus Logic 

CS5373A

1. CHARACTERISTICS AND SPECIFICATIONS

• Min / Max characteristics and specifications are guaranteed over the Specified Operating Conditions.

• Typical performance characteristics and specifications are measured at nominal supply voltages and TA = 25°C.

• GND = 0 V. Single-ended voltages with respect to GND, differential voltages with respect to opposite half.

• Device is connected as shown in Figure 8 on page 20 unless otherwise noted.

SPECIFIED OPERATING CONDITIONS

Parameter

Bipolar Power Supplies

Positive Analog

Negative Analog

Positive Digital

Voltage Reference

{VREF+} - {VREF-}

VREF-

Thermal

Ambient Operating Temperature

Symbol Min

Nom

Max Unit

± 2% VA+

2.45

2.50

2.55

V

(Note 1) ± 2% VA-

-2.45 -2.50 -2.55

V

± 3% VD

3.20

3.30

3.40

V

(Note 2, 3) VREF

-

2.500

-

V

(Note 4) VREF-

-

VA -

-

V

Industrial (-ISZ) TA

-40

25

85

°C

Notes: 1. VA- must always be the most-negative input voltage to avoid potential SCR latch-up conditions.

2. By design, a 2.500 V voltage reference input results in the best signal-to-noise performance.

3. Full-scale accuracy is directly proportional to the voltage reference absolute accuracy.

4. VREF inputs must satisfy: VA- < VREF- < VREF+ < VA+.

Modes of Operation

MODE

Selection [2:0]

Mode Description

0

0 0 0 Modulator: enabled.

DAC: sleep.

1

0 0 1 Modulator: enabled.

DAC: AC OUT and BUF outputs.

2

0 1 0 Modulator: enabled.

DAC: AC OUT only, BUF high-z.

3

0 1 1 Modulator: enabled.

DAC: AC BUF only, OUT high-z.

4

1 0 0 Modulator: enabled.

DAC: DC common mode output.

5

1 0 1 Modulator: enabled.

DAC: DC differential output.

6

1 1 0 Modulator: enabled.

DAC: AC common mode output.

7

1 1 1 Modulator: sleep.

DAC: sleep.

Selection

0

1

2

3

4

5

6

7

DAC Attenuation

ATT[2:0] Attenuation

000

1/1

001

1/2

010

1/4

0 11

1/8

100

1/16

101

1/32

11 0

1/64

111

reserved

Table 1. Selections for Operational Mode and DAC Attenuation

dB

0 dB

-6.02 dB

-12.04 dB

-18.06 dB

-24.08 dB

-30.10 dB

-36.12 dB

reserved

4

DS703F1

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