CS42448 datasheet(15/64 Pages) CIRRUS

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DS648F2

CS42448

ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE)

(Test Conditions (unless otherwise specified): TA = -40 to +85°C; VD = VLS = VLC = 3.3 V±5%, VA = 5 V±5%;

Full-scale 997 Hz output sine wave (see Note 11) in Figure 32 on page 57 and Figure 32 on page 57; Measure-

ment Bandwidth is 10 Hz to 20 kHz.)

Notes:

10. Guaranteed by design. The DC current draw represents the allowed current draw from the AOUT pin

due to typical leakage through the electrolytic DC-blocking capacitors.

11. One-half LSB of triangular PDF dither is added to data.

12. Guaranteed by design. See Figure 2. RL and CL reflect the recommended minimum resistance and

maximum capacitance required for the internal op-amp's stability and signal integrity. In this circuit to-

pology, CL will effectively move the dominant pole of the two-pole amp in the output stage. Increasing

this value beyond the recommended 100 pF can cause the internal op-amp to become unstable. See

“External Filters” on page 53 for a recommended output filter.

Parameter

Differential

Min

Typ

Max

Single-Ended

Min

Typ

Max

Unit

Fs = 48 kHz, 96 kHz, 192 kHz

Dynamic Range

18 to 24-Bit

A-weighted

unweighted

16-Bit

A-weighted

unweighted

100

108

105

102

Total Harmonic Distortion + Noise

18 to 24-Bit

0 dB

-20 dB

-60 dB

16-Bit

0 dB

-20 dB

-60 dB

-98

-85

-45

-93

-76

-36

-90

-95

-82

-42

-90

-73

-33

-87

Interchannel Isolation

(1 kHz)

100

Analog Output

Full-Scale Output

1.210•VA 1.300•VA 1.392•VA 0.605•VA 0.650•VA 0.696•VA

Vpp

Interchannel Gain Mismatch

0.1

0.25

0.1

0.25

Gain Drift

±100

ppm/°C

Output Impedance

100

DC Current draw from an AOUT pin

(Note 10)

μA

AC-Load Resistance (RL) (Note 12)

Load Capacitance (CL)

(Note 12)

100

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