TLC3544, TLC3548

5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL

ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS

SLAS266C – OCTOBER 2000 – REVISED MAY 2003

8

POST OFFICE BOX 655303

general electrical characteristics over recommended operating free-air temperature range,

analog input signal source resistance = 25

Ω (unless otherwise noted) (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

DC Accuracy—Normal Short Sampling

EL

Integral linearity error

See Note 3

±0.8

LSB

ED

Differential linearity error

±0.6

LSB

EO

Zero offset error

See Note 4

–3

±0.6

3

LSB

E(g+)

Gain error

See Note 4

0

5

12

LSB

AC Accuracy—Normal Long Sampling

SINAD

Signal to noise ratio + distortion

fi = 20 kHz

78.6

80.8

dB

SINAD

Signal-to-noise ratio + distortion

fi = 100 kHz

77.6

dB

THD

Total harmonic distortion

fi = 20 kHz

–95

–90

dB

THD

Total harmonic distortion

fi = 100 kHz

–88

dB

SFDR

Spurious free dynamic range

fi = 20 kHz

90

97

dB

SFDR

Spurious free dynamic range

fi = 100 kHz

89

dB

ENOB

Effective number of bits

fi = 20 kHz

12.8

13.1

Bits

ENOB

Effective number of bits

fi = 100 kHz

12.6

Bits

SNR

Signal to noise ratio

fi = 20 kHz

79

81

dB

SNR

Signal-to-noise ratio

fi = 100 kHz

78

dB

Channel-to-channel isolation (see

Notes 2 and 5)

Fixed channel in conversion mode 00, fi = 35 kHz

100

dB

Analog input bandwidth

Full power bandwidth, –1 dB

2

MHz

Analog input bandwidth

Full power bandwidth, –3 dB

2.5

MHz

AC Accuracy—Normal Short Sampling

SINAD

Signal to noise ratio + distortion

fi = 20 kHz

78.9

dB

SINAD

Signal-to-noise ratio + distortion

fi = 100 kHz

77.6

dB

THD

Total harmonic distortion

fi = 20 kHz

–95

dB

THD

Total harmonic distortion

fi = 100 kHz

–88

dB

SNR

Signal to noise ratio

fi = 20 kHz

79

dB

SNR

Signal-to-noise ratio

fi = 100 kHz

78

dB

ENOB

Effective number of bits

fi = 20 kHz

12.8

Bits

ENOB

Effective number of bits

fi = 100 kHz

12.6

Bits

SFDR

Spurious free dynamic range

fi = 20 kHz

97

dB

SFDR

Spurious free dynamic range

fi = 100 kHz

89

dB

Channel-to-channel isolation (see

Notes 2 and 5)

Fixed channel in conversion mode 00, fi = 35 kHz

100

dB

Analog input bandwidth

Full power bandwidth, –1 dB

2

MHz

Analog input bandwidth

Full power bandwidth, –3 dB

2.5

MHz

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

NOTES:

2. This is for a fixed channel in conversion mode 00 or 01. When switching the channels, additional multiplexer setting time is required

to overcome the memory effect of the charge redistribution DAC (refer to Figure 8).

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

4. Zero offset error is the difference between 0000000000000 and the converted output for zero input voltage; gain error is the

difference between 11111111111111 and the converted output for full-scale input voltage. The full-scale input voltage is equal to the

reference voltage being used.

5. 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 (refer to Figure 8).