4–3

4.4.3.3

ADC Signal-to-Distortion+Noise (see Note 5)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI = – 9 dB

80

83

VI = – 1 dB

72

76

Total harmonic distortion+noise (THD+N)

VI = – 40 dB

40

45

dB

VI = – 65 dB

14

20

VI(AUXM, AUXP) = – 9 dB

72

77

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.

4.4.4

ADC Channel

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Dynamic range

86

dB

Interchannel isolation

80

dB

Gain error

VI = – 1 dB at 1020 Hz

±0.5

dB

Gain error, dc

INP = 3 V, INM = 2 V

±0.6

dB

Off-set error, ADC converter

8

mV

CMRR

Common-mode rejection ratio INM, INP or

AUXM, AUXP

VI = 0 dB at 1020 kHz

80

dB

Idle channel noise (on-chip reference)

50

µV rms

Ri

Input resistance

TA = 25°C

70

100

k

Ω

4.4.5

DAC Path Filter (see Note 6)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

20 Hz

–0.5

0.08

0.15

200 Hz

– 0.5

0.08

0.15

300 Hz to 3 kHz

– 0.15

0.08

0.15

Filter gain relative to gain at 1020 Hz

3.3 kHz

– 0.35

0.11

0.3

dB

3.4 kHz

–1

– .48

– 0.1

4 kHz

–20

–14

≥ 4.6 kHz

–40

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 peak-to-peak

output voltage with this input condition is 6 V. The pass band is 0 to 3600 Hz.