TLC1514 datasheet(21/40 Pages) TI

21 / 40 page

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

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, VCC = VREFP = 4.5 V to

5.5 V, SCLK frequency = 20 MHz at 5 V, (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

VCC = 5.5 V, IOH = –20 µA at 30 pF load

2.4

VOL

Low-level output voltage

VCC = 5.5 V, IOL = 20 µA at 30 pF load

0.4

IOZ

Off-state output current

VO = VCC

2.5

µA

IOZ

O sae ou u cu e

(high-impedance-state)

VO = 0

CS = VCC

–1

-2.5

µA

IIH

High-level input current

VI = VCC

0.005

2.5

µA

IIL

Low-level input current

VI = 0 V

–0.005

2.5

µA

ICC

Operating supply current, normal sampling

CS at 0 V, Ext ref

VCC = 4.5 V to 5.5 V

ICC

Oe a

g su

y cu e , o

a sa

(short)

CS at 0 V, Int ref

VCC = 4.5 V to 5.5 V

ICC

Operating supply current extended sampling

CS at 0 V, Ext ref

VCC = 4.5 V to 5.5 V

1.9

ICC

Operating supply current, extended sampling

CS at 0 V, Int ref

VCC = 4.5 V to 5.5 V

Internal reference supply current

CS at 0 V, VCC = 4.5 V to 5.5 V

ICC(PD)

Power-down supply current

For all digital inputs,

≤ VI ≤ 0.3 V or VI ≥ VCC– 0.3 V,

SCLK = 0, VCC = 4.5 V to 5.5 V,

Ext clock

0.1

µA

ICC(AUTOPWDN)

Auto power-down current

For all digital inputs,

≤ VI ≤ 0.3 V or VI ≥ VCC– 0.3 V,

SCLK = 0, VCC = 4.5 V to 5.5 V,

Ext clock, Ext ref

5‡

µA

Selected channel leakage current

Selected channel at VCC

µA

Selected channel leakage current

Selected channel at 0 V

–1

µA

Maximum static analog reference current into

REFP (use external reference)

VREFP = VCC = 5.5 V, VREFM = GND

µA

Input capacitance

Analog inputs

Input capacitance

Control Inputs

Input MUX ON resistance

VCC = 5.5 V

500

Ω

† All typical values are at VCC = 5 V, TA = 25°C.

‡ 800

µA if internal reference is used.

ac specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SINAD

Signal-to-noise ratio +distortion

fI = 12 kHz at 400 KSPS

THD

Total harmonic distortion

fI = 12 kHz at 400 KSPS

–80

–72

ENOB

Effective number of bits

fI = 12 kHz at 400 KSPS

9.6

Bits

SFDR

Spurious free dynamic range

fI = 12 kHz at 400 KSPS

–82

–72

Analog input

Full power bandwidth, –3 dB

MHz

Full power bandwidth, –1 dB

500

kHz

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