5–4

5.6

DAC Path Digital Filter, fs = 8 kHz (see Note 4)

5.6.1

FIR Filter

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

0 to 300 Hz

–0.5

0.2

300 Hz to 3 kHz

–0.25

0.25

Filter gain relati e to gain at 1020 H

3.3 kHz

–0.35

0.3

dB

Filter gain relative to gain at 1020 Hz

3.6 kHz

–3

dB

4 kHz

–40

≥4.4 kHz

–74

5.6.2

IIR Filter

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

0 to 300 Hz

–0.5

0.2

300 Hz to 3 kHz

–0.25

0.25

Filter gain relative to gain at 1020 Hz

3.3 kHz

–0.35

0.3

dB

Filter gain relative to gain at 1020 Hz

3.6 kHz

–3

dB

4 kHz

–20

≥4.4 kHz

–60

NOTE 4: Filter gain outside of the bandpass is measured with respect to gain at 1020 Hz. The input signal is the digital equivalent of a sine wave

(digital full scale = 0 dB). The nominal differential DAC channel output with this input condition is 4 VI(PP). The pass band is 0 Hz to 3600

Hz for an 8-kHz sample rate. This pass band scales linearly with the conversion rate.

5.7

DAC Dynamic Performance

5.7.1

OUTP/OUTM Signal-to-Noise When Load Is 600

Ω (see Note 5)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = 0 dB

80

92

SNR

Signal-to-noise ratio (SNR)

VI = –9 dB

75

83

dB

SNR

Signal to noise ratio (SNR)

VI = –40 dB

40

51

dB

NOTE 5: Test condition is the digital equivalent of a 1020-Hz input signal with an 8-kHz conversion rate. The test is measured at the output of

the application schematic low-pass filter. The test is conducted in 16-bit mode.

5.7.2

OUTP/OUTM Signal-to-Distortion When Load Is 600

Ω (see Note 5)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = –0 dB

78

85

THD

Total harmonic distortion

VI = –9 dB

74

83

THD

Total harmonic distortion

VI = –40 dB

59

62

NOTE 5: Test condition is the digital equivalent of a 1020-Hz input signal with an 8-kHz conversion rate. The test is measured at the output of

the application schematic low-pass filter. The test is conducted in 16-bit mode.

5.7.3

OUTP/OUTM Signal-to-Distortion + Noise When Load Is 600

Ω (see Note 5)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = –0 dB

75

82

Signal-to-total harmonic distortion + noise (THD + N)

VI = –9 dB

70

77

dB

Signal to total harmonic distortion + noise (THD + N)

VI = –40 dB

34

44

dB

NOTE 5: Test condition is the digital equivalent of a 1020-Hz input signal with an 8-kHz conversion rate. The test is measured at the output of

the application schematic low-pass filter. The test is conducted in 16-bit mode.