REF1925AIDDCT datasheet(5/31 Pages) TI1

5 / 31 page

REF1925, REF1930, REF1933, REF1941

www.ti.com

SBOS697 – SEPTEMBER 2014

7.5

Electrical Characteristics

At TA = 25°C, IL = 0 mA, and VIN = 5 V, unless otherwise noted. Both VREF and VBIAS have the same specifications.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ACCURACY AND DRIFT

Output voltage accuracy

–0.1%

0.1%

Output voltage temperature coefficient(1)

–40°C

≤ TA ≤ 125°C

±10

±25

ppm/°C

–40°C

≤ TA ≤ 85°C

±1.5

±6

ppm/°C

VREF and VBIAS tracking over temperature

(2)

–40°C

≤ TA ≤ 125°C

±2

±7

ppm/°C

LINE AND LOAD REGULATION

ΔVO(ΔVI)

Line regulation

VREF + 0.02 V ≤ VIN ≤ 5.5 V

ppm/V

0 mA

≤ IL ≤ 20 mA ,

Sourcing

ppm/mA

VREF + 0.6 V ≤ VIN ≤ 5.5 V

ΔVO(ΔIL)

Load regulation

0 mA

≤ IL ≤ –20 mA,

Sinking

ppm/mA

VREF + 0.02 V ≤ VIN ≤ 5.5 V

POWER SUPPLY

360

430

µA

Active mode

–40°C

≤ TA ≤ 125°C

460

µA

ICC

Supply current

3.3

µA

Shutdown mode

–40°C

≤ TA ≤ 125°C

µA

Device in shutdown mode (EN = 0)

0.7

Enable voltage

Device in active mode (EN = 1)

VIN – 0.7

VIN

Dropout voltage

IL = 20 mA

600

ISC

Short-circuit current

ton

Turn-on time

0.1% settling, CL = 1 µF

500

µs

NOISE

Low-frequency noise(3)

0.1 Hz

≤ f ≤ 10 Hz

ppmPP

Output voltage noise density

f = 100 Hz

0.25

ppm/

√Hz

CAPACITIVE LOAD

Stable output capacitor range

µF

HYSTERESIS AND LONG-TERM STABILITY

Long-term stability

0 to 1000 hours

ppm

Cycle 1

ppm

Output voltage hysteresis(4)

25°C, –40°C, 125°C, 25°C

Cycle 2

ppm

(1)

Temperature drift is specified according to the box method. See the Feature Description section for more details.

(2)

The VREF and VBIAS tracking over temperature specification is explained in more detail in the Feature Description section.

(3)

The peak-to-peak noise measurement procedure is explained in more detail in the Noise Performance section.

(4)

The thermal hysteresis measurement procedure is explained in more detail in the Thermal Hysteresis section.

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