TLC2551 Datasheet, PDF (10/23 Pages) Texas Instruments – 5 V, LOW POWER, 12-BIT, 400 KSPS, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN

TLC2551, TLC2552, TLC2555
5 V, LOW POWER, 12-BIT, 400 KSPS,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN
SLAS276 –MARCH 2000
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 ~ 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 – 5.5 V
MIN TYP MAX UNIT
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 NOM MAX UNIT
INL
Integral linearity error (see Note 5)
±0.6
±1 LSB
DNL
Differential linearity error
See Note 4
±0.5
±1 LSB
EO
Offset error (see Note 6)
See Note 4
TLC2551/52
TLC2555
±1.5
LSB
±2.5
EG
Gain error (see Note 6)
See Note 4
TLC2551/52
TLC2555
±2
LSB
±5
Et
NOTES:
Total unadjusted error (see Note 7)
See Note 4
TLC2551/52
TLC2555
±2
LSB
±5
4. Analog input voltages greater than that applied to REFP convert as all ones (111111111111), while input voltages less than that
applied to REFM convert as all zeros (0000000000).
5. Linear error is the maximum deviation from the best straight line through the A/D transfer characteristics.
6. 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.
7. Total unadjusted error comprises linearity, zero, and full-scale errors.
10
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265