TLV2556-EP datasheet(5/37 Pages) TI

Part #	TLV2556-EP

Description	12-BIT 200-KSPS 11-CHANNEL LOW-POWER SERIAL ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE

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Manufacturer	TI [Texas Instruments]

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ELECTRICAL CHARACTERISTICS

TLV2556-EP

www.ti.com ................................................................................................................................................... SLAS598A – NOVEMBER 2008 – REVISED JULY 2009

over recommended operating free-air temperature range, VREF+ = 5 V,

SCLK frequency = 15 MHz when VCC = 5 V, VREF+ = 2.5 V,

SCLK frequency = 10 MHz when VCC = 2.7 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN TYP(1)

MAX

UNIT

VCC = 4.5 V, IOH = –1.6 mA

2.4

VCC = 2.7 V, IOH = –0.2 mA

VOH

High-level output voltage

30 pF

V

VCC = 4.5 V, IOH = –20 µA

VCC – 0.1

VCC = 2.7 V, IOH = –20 µA

VCC = 5.5 V, IOL = 1.6 mA

0.4

VCC = 3.6 V, IOL = 0.8 mA

VOH

Low-level output voltage

30 pF

V

VCC = 5.5 V, IOL = –20 µA

0.1

VCC = 3.6 V, IOL = –20 µA

VO = VCC, CS = VCC

1

2.5

IOZ

High impedance off state output current

µA

VO = 0 V, CS = VCC

–1

–2.5

VCC = 5 V

1.2

CS at 0 V, External reference

VCC = 2.7 V

0.9

ICC

Operating supply current

mA

VCC = 5 V

3

CS at 0 V, Internal reference

VCC = 2.7 V

2.4

External

0.1

10

For all digital inputs,

reference

ICC(SP

Software power down current

0 V

≤ VI ≤ 0.5 V or

µA

D)

Internal

VI ≥ VCC – 0.5 V, SCLK = 0 V

0.1

10

reference

External

0.1

10

For all digital inputs,

reference

ICC(AP

Auto power down current

0 V

≤ VI ≤ 0.5 V or

µA

D)

Internal

VI ≥ VCC – 0.5 V, SCLK = 0 V

1800

reference

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

Selected channel at VCC ,

1

Unselected channel at 0 V

Ilkg

Selected channel leakage current

µA

Selected channel at 0 V,

–1

Unselected channel at VCC

VCC = 4.5 V to 5.5 V

3.0

f(OSC)

Internal oscillator frequency

MHz

VCC = 2.7 V to 3.6 V

2.1

VCC = 4.5 V to 5.5 V

4.53

tconv

Conversion time = 13.5 × f(OSC) + 25 ns

µs

VCC = 2.7 V to 3.6 V

6.46

Internal oscillator frequency

3.9

V

switch-over voltage

VCC = 4.5 V

600

Zi

Analog input MUX impedance(2)

Ω

VCC = 2.7 V

500

Analog inputs

45

Ci

Input capacitance

pF

Control inputs

5

(1)

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

(2)

The switch resistance is very nonlinear and varies with input voltage and supply voltage.

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