Datasheet

TLC1514, TLC1518
5-V, 10-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS252 – DECEMBER 1999
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, V
CC
= V
REFP
= 4.5 V to
5.5 V, SCLK frequency = 20 MHz at 5 V, (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT
V
OH
High-level output voltage V
CC
= 5.5 V, I
OH
= –20 µA at 30 pF load 2.4 V
V
OL
Low-level output voltage V
CC
= 5.5 V, I
OL
= 20 µA at 30 pF load 0.4 V
I
OZ
Off-state output current
V
O
= V
CC
CS V
1 2.5
µA
I
OZ
O saeou u cu e
(high-impedance-state)
V
O
= 0
CS
=
V
CC
–1 -2.5
µ
A
I
IH
High-level input current V
I
= V
CC
0.005 2.5 µA
I
IL
Low-level input current V
I
= 0 V –0.005 2.5 µA
I
CC
Operatin
g
suppl
y
current, normal samplin
g
CS at 0 V, Ext ref V
CC
= 4.5 V to 5.5 V 4 mA
I
CC
Oea gsu ycue , o asa g
(short)
CS at 0 V, Int ref V
CC
= 4.5 V to 5.5 V 6 mA
I
CC
O
p
erating su
pp
ly current extended sam
p
ling
CS at 0 V, Ext ref V
CC
= 4.5 V to 5.5 V 1.9 mA
I
CC
Operating
supply
current
,
extended
sampling
CS at 0 V, Int ref V
CC
= 4.5 V to 5.5 V 2 mA
Internal reference supply current CS at 0 V, V
CC
= 4.5 V to 5.5 V 2 mA
I
CC(PD)
Power-down supply current
For all digital inputs,
0≤ V
I
≤ 0.3 V or V
I
≥ V
CC
– 0.3 V,
SCLK = 0, V
CC
= 4.5 V to 5.5 V,
Ext clock
0.1 1 µA
I
CC(AUTOPWDN)
Auto power-down current
For all digital inputs,
0≤ V
I
≤ 0.3 V or V
I
≥ V
CC
– 0.3 V,
SCLK = 0, V
CC
= 4.5 V to 5.5 V,
Ext clock, Ext ref
5
‡
µA
Selected channel leakage current
Selected channel at V
CC
1
µA
Selected
channel
leakage
current
Selected channel at 0 V –1
µ
A
Maximum static analog reference current into
REFP (use external reference)
V
REFP
= V
CC
= 5.5 V, V
REFM
= GND 1 µA
C
i
In
p
ut ca
p
acitance
Analog inputs 45 50
p
F
C
i
Input
capacitance
Control Inputs 5 25
pF
Z
i
Input MUX ON resistance V
CC
= 5.5 V 500 Ω
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
800 µA if internal reference is used.
ac specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SINAD Signal-to-noise ratio +distortion f
I
= 12 kHz at 400 KSPS 59 60 dB
THD Total harmonic distortion f
I
= 12 kHz at 400 KSPS –80 –72 dB
ENOB Effective number of bits f
I
= 12 kHz at 400 KSPS 9.6 Bits
SFDR Spurious free dynamic range f
I
= 12 kHz at 400 KSPS –82 –72 dB
Analog input
Full power bandwidth, –3 dB 1 MHz
Full power bandwidth, –1 dB 500 kHz