4–3

4.3.4.2 ADC Signal-to-Distortion (see Note 5 and Figure 5-11)

PARAMETER

TEST CONDITIONS

TLC320AD50C/52C

TLC320AD50I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

VI = – 3 dB (4.25 V)

80

85

79

84

VI = – 9 dB (2.13 V)

79

90

78

89

Signal-to-total harmonic distortion (THD)

VI = – 40 dB (60 mV)

67

72

66

71

dB

VI = – 65 dB (3 mV)

43

48

42

47

VAUX = – 9 dB

79

90

78

89

NOTE 5. The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output are referenced to VDD /2.

4.3.4.3 ADC Signal-to-Distortion + Noise (see Note 5 and Figure 5-12)

PARAMETER

TEST CONDITIONS

TLC320AD50C/52C

TLC320AD50I

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

VI = – 3 dB (4.25 V)

78

82

76

80

VI = – 9 dB (2.13 V)

76

80

74

78

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

VI = – 40 dB (60 mV)

45

49

43

47

dB

VI = – 65 dB (3 mV)

20

24

19

22

VAUX = – 9 dB

76

80

74

78

NOTE 5. The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output are referenced to VDD /2.

4.3.5

ADC Channel Characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VI(PP)

Peak-to-peak input voltage

(differential (INP–INM) peak, for full scale operation)

6

V

Dynamic range

VI = – 1 dB (5.35 V)

88

dB

Interchannel isolation

100

dB

EG

Gain error

VI = – 1 dB at 1020 Hz

± 0.3

dB

EO(ADC) ADC converter offset error

5

15

mV

CMRR

Common-mode rejection ratio at INM, INP or AUXM, AUXP

VI = –1 dB at 1020 Hz

74

dB

Idle channel noise (on-chip reference)

VINP, INM = 2.5 V

75

µV rms

Ri

Input resistance

TA = 25°C

35

k

Ω

Channel delay

17/fs

s

4.3.6

DAC Path Filter, MCLK = 8.192 MHz, fs = 8 kHz (see Note 6, Figures 5-8 and 5-9)

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 pass band 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 pass band

is 0 to 3600 Hz for an 8-kHz sample rate. This pass band scales linearly with the conversion rate.