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CS5373A

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

Cirrus Logic 

CS5373A

MODULATOR CHARACTERISTICS

Parameter

Symbol

Input Characteristics

Input Signal Frequencies

Full Scale Differential AC Input

Full Scale Differential DC Input

Input Common Mode Voltage

Input Voltage Range (Signal ± Vcm)

(Note 9, 12)

(Note 9)

(Note 9)

(Note 13)

(Note 9)

VBW

VAC

VDC

VCM

VRNG

Dynamic Performance

Dynamic Range

(Note 12, 14)

(1/4 ms) DC to 1720 Hz

(1/2 ms) DC to 860 Hz

(1 ms) DC to 430 Hz

(2 ms) DC to 215 Hz

(4 ms) DC to 108 Hz

(8 ms) DC to 54 Hz

(16 ms) DC to 27 Hz

SNR

Signal Dependent Noise

(Note 15, 16)

(1 ms) DC to 430 Hz SDN

Total Harmonic Distortion

(Note 16) THD

Linearity

(Note 16) LIN

Common Mode Rejection Ratio

CMRR

Gain Accuracy

Channel to Channel Gain Accuracy

(Note 3) GA

Channel Gain Drift

Offset

(Note 17) GATC

Offset Voltage, Differential

OFST

Offset after Calibration

Offset Calibration Range

Offset Voltage Drift

(Note 18) OFSTCAL

(Note 19) OFSTRNG

(Note 17) OFSTTC

Min

Typ

Max

DC

-

2000

-

-

5

-2.5

-

2.5

-

(VA-)+2.5

-

(VA-)+0.7

-

(VA+)-1.25

-

109

-

-

121

-

121

124

-

-

127

-

-

130

-

-

133

-

-

136

-

100

110

-

-

-118 -112

-

0.000126 0.000251

-

110

-

-

±1

±2

-

22

-

-

+100

-

-

±1

-

-

100

-

-

300

-

Unit

Hz

Vpp

Vdc

V

V

dB

dB

dB

dB

dB

dB

dB

dB

dB

%

dB

%

ppm/°C

mV

µV

%FS

nV/°C

Notes: 12. The upper bandwidth limit is determined by the CS5378 digital filter cut-off frequency.

13. Common mode voltage is defined as the mid-point of the differential signal.

14. Dynamic Range defined as 20 log [ (RMS full scale) / (RMS idle noise) ] where idle noise is measured

from a CS3301A / CS3302A amplifier terminated input at 1x gain.

15. Signal-dependent Noise defined as 20 log [ (RMS full scale) / (RMS signal noise) ] where signal noise

is measured by subtracting out the signal power at the fundamental and harmonic frequencies.

16. Tested with a 31.25 Hz sine wave at -1 dB amplitude.

17. Specification is for the parameter over the specified temperature range and is for the device only. It does

not include the effects of external components.

18. Specification applies to the effective offset voltage calculated from the output codes of the CS5378

digital filter following offset calibration and correction.

19. Offset calibration is performed in the CS5378 digital filter and includes the full-scale signal range.

8

DS703F1

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