TLC2551_16 Datasheet, PDF (11/28 Pages) Texas Instruments – 5-V, LOW-POWER, 12-BIT, 175/360 KSPS, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN

TLC2551, TLC2552, TLC2555
5-V, LOW-POWER, 12-BIT, 175/360 KSPS,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN
SLAS276D – MARCH 2000 – REVISED MAY 2003
ac specifications (f_i = 20 kHz)
PARAMETER
SINAD Signal-to-noise ratio + distortion
THD Total harmonic distortion
ENOB Effective number of bits
SFDR Spurious free dynamic range
Analog Input
Full-power bandwidth, –3 dB
Full-power bandwidth, –1 dB
TEST CONDITIONS
400 KSPS, VDD = VREF = 5 V
400 KSPS, VDD = VREF = 5 V
400 KSPS, VDD = VREF = 5 V
400 KSPS, VDD = VREF = 5 V
MIN TYP MAX UNIT
70
72
dB
–84 –80 dB
11.8
bits
–84 –80 dB
1
MHz
500
kHz
external reference specifications
VREF
PARAMETER
Reference input voltage
Reference input impedance
Reference current
Reference input capacitance
Reference voltage
TEST CONDITIONS
VDD = 4.5 V to 5.5 V
VDD = 5.5 V
CS = 1, SCLK = 0
CS = 0, SCLK = 20 MHz
VDD = VREF = 5.5 V
VDD = VREF = 5.5 V
CS = 1, SCLK = 0
CS = 0, SCLK = 20 MHz
VDD = 4.5 V to 5.5 V
MIN TYP MAX UNIT
2
VDD V
100
MΩ
20
25
kΩ
100 400 µA
5
15
pF
20
45
50
VDD V
dc specification, V_DD = V_REF = 4.5 V to 5.5 V, SCLK frequency = 20 MHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
INL
Integral linearity error (see Note 4)
±0.6
±1 LSB
DNL
Differential linearity error
See Note 3
±0.5
±1 LSB
EO
Offset error (see Note 5)
See Note 3
TLC2551/52
TLC2555
±1.5
LSB
±2.5
EG
Gain error (see Note 5)
See Note 3
TLC2551/52
TLC2555
±2
LSB
±5
Et
NOTES:
Total unadjusted error (see Note 6)
See Note 3
TLC2551/52
TLC2555
±2
LSB
±5
3. Analog input voltages greater than that applied to VREF convert as all ones (111111111111).
4. Linear error is the maximum deviation from the best straight line through the A/D transfer characteristics.
5. Zero error is the difference between 000000000000 and the converted output for zero input voltage: full-scale error is the difference
between 111111111111 and the converted output for full-scale input voltage.
6. Total unadjusted error comprises linearity, zero, and full-scale errors.
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