4–4

4.4.6

DAC Dynamic Performance

4.4.6.1

DAC Signal-to-Noise (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VO = 0 dB

74

80

Signal to noise ratio (SNR)

VO = – 9 dB

70

74

dB

Signal-to-noise ratio (SNR)

VO = – 40 dB

38

44

dB

VO = – 65 dB

14

18

NOTE 4: The test condition is the digital equivalent of a 1020 Hz input signal with an 8 kHz conversion rate. The load

impedance is 600

Ω. Input and output voltages are referred to VDD/2.

4.4.6.2

DAC Signal-to- Distortion (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VO = 0 dB

74

84

Signal to total harmonic distortion (THD)

VO = – 9 dB

74

84

dB

Signal-to-total harmonic distortion (THD)

VO = – 40 dB

40

58

dB

VO = – 65 dB

18

30

NOTE 4: The test condition is the digital equivalent of a 1020 Hz input signal with an 8 kHz conversion rate. The load

impedance is 600

Ω. Input and output voltages are referred to VDD/2.

4.4.6.3

DAC Signal-to-Distortion + Noise (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VO = 0 dB

72

78

Total harmonic distortion+noise (THD+N)

VO = – 9 dB

68

74

dB

Total harmonic distortion+noise (THD+N)

VO = – 40 dB

38

44

dB

VO = – 65 dB

14

20

NOTE 4: The test condition is the digital equivalent of a 1020 Hz input signal with an 8 kHz conversion rate. The load

impedance is 600

Ω. Input and output voltages are referred to VDD/2.

4.4.7

DAC Channel

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Dynamic range

80

dB

Interchannel isolation

80

dB

Gain error, 0 dB

VO = 0 dB at 1020 Hz

±0.5

dB

Gain error, dc

Digital input offset = 1 V dc

±0.2

dB

Idle channel broad-band noise

See Note 7

100

µV rms

Idle channel narrow-band noise

0 – 4 kHz,

See Note 7

40

µV rms

VOO

Output offset voltage at OUT

(differential)

DIN = All 0s

8

mV

VO

Analog output voltage,

peak-to-peak, OUTP – OUTM

(differential)

RL = 600,

With internal reference and full-scale

digital input, (see Note 8)

6

V

NOTES:

7. The conversion rate is 8 kHz; the out-of-band measurement is made from 4800 Hz to FMCLK/2.

8. The digital input to the DAC channel at DIN is in 2s complement.