TLC3574, TLC3578, TLC2574, TLC2578

5V ANALOG, 3/5V DIGITAL, 14/12BIT, 200KSPS, 4/8CHANNEL

SERIAL ANALOGTODIGITAL CONVERTERS WITH ±10V INPUTS

SLAS262C − OCTOBER 2000 − REVISED MAY 2003

11

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TLC2574/78 DW and PW package devices AC/DC performance

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

DC Accuracy

EL

Integral linearity error

See Note 6

−1

±0.5

1

LSB

ED

Differential linearity error

−1

±0.5

1

LSB

EO

Bipolar zero error

See Note 7

−0.30

±0.08

0.36

%FS

EFS(+)

Positive full scale error

See Note 7

−0.55

±0.04

0.61

%FS

EFS(−)

Negative full scale error

See Note 7

−0.30

±0.13

0.79

%FS

AC Accuracy

SINAD

Signal-to-noise ratio + distortion

fi = 20 kHz

70

72

dB

SINAD

Signal-to-noise ratio + distortion

fi = 100 kHz

70

dB

THD

Total harmonic distortion

fi = 20 kHz

−82

−76

dB

THD

Total harmonic distortion

fi = 100 kHz

−80

dB

SNR

Signal-to-noise ratio

fi= 20 kHz

71

72

dB

SNR

Signal-to-noise ratio

fi = 100 kHz

71

dB

ENOB

Effective number of bits

fi = 20 kHz

11.3

11.7

Bits

ENOB

Effective number of bits

fi = 100 kHz

11.3

Bits

SFDR

Spurious free dynamic range

fi = 20 kHz

78

83

dB

SFDR

Spurious free dynamic range

fi = 100 kHz

80

dB

Analog input bandwidth

Full power bandwidth, −3 dB

1

MHz

Analog input bandwidth

Full power bandwidth, −1 dB

700

kHz

Channel-to-channel Isolation

Fixed channel in conversion mode 00, fi = 35 kHz,

See Note 8

81

dB

† All typical values are at TA = 25°C.

NOTES:

6. Linear error is the maximum deviation from the best fit straight line through the A/D transfer characteristics.

7. Bipolar zero error is the difference between 100000000000 and the converted output for zero input voltage; positive full-scale error

is the difference between 111111111111 and the converted output for positive full-scale input voltage (10 V); negative full-scale error

is the difference between 000000000000 and the converted output for negative full-scale input voltage (−10 V).

8. It is measured by applying a full-scale of 35 kHz signal to other channels and determining how much the signal is attenuated in the

channel of interest. The converter samples this examined channel continuously. The channel-to-channel isolation is degraded if the

converter samples different channels alternately.