5–3

5.3.3.3 ADC Signal-to-Distortion + Noise (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = –3 dB

71

76

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

VI = –9 dB

68

73

dB

VI = –40 dB

37

42

NOTE 4: The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output common mode is 2.5 V for 5-V supply and

1.5 V for 3.3-V supply. The output configuration is in a 5 V differential-ended mode.

5.3.4

ADC Characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI(PP)

Peak-input voltage (5.0 V supply)

Preamp gain = 0 dB

3

V

VI(PP)

Peak-input voltage (3.3 V supply)

Preamp gain = 0 dB

2

V

Dynamic range

VI =–1 dB at 1020 Hz

80

dB

Interchannel isolation

87

dB

EG

Gain error

VI = –1 dB at 1020 Hz

±0.5

dB

EO(ADC)

ADC channel offset error including hybrid amplifiers

10

mV

CMRR

Common-mode rejection ratio

VI = –1 dB at 1020 Hz

80

dB

Idle channel noise (on-chip reference)

50

100

µVrms

Channel delay

17/fs

s

5.3.5

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

3.6 kHz

–3

4 kHz

–35

NOTE 5: The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The input signal is the digital equivalent of a

sine wave (digital full scale = 0 dB). The –3 dB pass band is 0 to 3600 Hz for an 8-kHz sample rate. This pass band scales linearly

with the sample rate.

5.3.6

DAC Dynamic Performance

5.3.6.1 DAC Signal-to-Noise (see Note 6)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = 0 dB

72

77

Signal-to-noise ratio (SNR)

VI = –9 dB

63

68

dB

VI = –40 dB

32

37

NOTE 6: The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. The output configuration is in a 5 V differential-ended mode.

5.3.6.2 DAC Signal-to-Distortion (see Note 6)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = –3 dB

77

82

Signal-to-total harmonic distortion (THD)

VI = –9 dB

72

77

dB

VI = –40 dB

61

66

NOTE 6: The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. The output configuration is in a 5 V differential-ended mode.