TLV2548-EP

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SLAS668 – OCTOBER 2009

ELECTRICAL CHARACTERISTICS (continued)

over operating free-air temperature range, VCC = VREFP = 3 V to 5.5 V, VREFM = 0 V, SCLK frequency = 20 MHz at 5 V,

15 MHz at 3 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP (1)

MAX

UNIT

REFERENCE SPECIFICATIONS(4)

(0.1

μF and 10 μF between REFP and

REFM pins)

Positive reference input

REFP

VCC = 2.7 V to 5.5 V

2

VCC

V

voltage

Negative reference input

REFM

VCC = 2.7 V to 5.5 V

0

2

V

voltage

CS = 1,

SCLK = 0, (off)

100

M

Ω

VCC = 5.5 V

SCLK = 20 MHz

CS = 0,

20

25

k

Ω

(on)

Reference Input impedance

CS = 1,

SCLK = 0 (off)

100

M

Ω

VCC = 2.7 V

SCLK = 15 MHz

CS = 0,

20

25

k

Ω

(on)

Reference Input voltage

REFP-REFM

VCC = 2.7 V to 5.5 V

2

VCC

V

difference

VCC = 5.5 V

VREF SELECT = 4 V

3.85

4

4.15

REFP-REFM

Internal reference voltage

VCC = 5.5 V

VREF SELECT = 2 V

1.925

2

2.075

V

VCC = 2.7 V

VREF SELECT = 2 V

1.925

2

2.075

Internal reference start–up

VCC = 5.5 V, 2.7 V with 10 μF compensation cap

20

ms

time

Internal reference

VCC = 2.7 V to 5.5 V

16

40(5)

PPM/°C

temperature coefficient

(4)

Specified by design.

(5)

Specified by design.

Copyright © 2009, Texas Instruments Incorporated

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