4–4

4.3.4.5

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = – 1 dB

78

VI = – 3 dB

79

84

VI = – 6 dB

76

81

Total harmonic distortion + noise (THD+N)

VI = – 9 dB

73

78

dB

VI = – 40 dB

42

47

VI = – 65 dB

17

22

VAUX = – 9 dB

73

78

NOTE 5: The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output voltages are

referred to VDD /2.

4.3.5

ADC Channel

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI(PP)

Peak-to-peak input voltage

6

V

Dynamic range

87

Interchannel isolation

110

dB

EG

Gain error

VI = – 1 dB at 1020 Hz

±0.3

EO(ADC)

ADC converter offset error

5

mV

CMRR

Common-mode rejection ratio at INM,

INP or AUXM, AUXP

VI = 0 dB at 1020 kHz

80

dB

Idle channel noise (on-chip reference)

30

75

µV rms

Ri

Input resistance

TA = 25°C

100

k

Ω

Channel delay

17/fs

s

4.3.6

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

– 40

≥ 4.4 kHz

– 74

NOTE 6: 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 nominal differential DAC channel output with

this input condition is 6 VI(PP). The –1 dB pass band is 0 to 3400 Hz for an 8-kHz sample rate. This pass band

scales linearly with the sample rate.