ADC 2 Especificaciones descargar pdf (Pagina 4)

ADS7865

SBAS441C –OCTOBER 2008–REVISED APRIL 2012

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

At T

= –40°C to +125°C; over entire power-supply voltage range, V

REF

= 2.5V (internal), f

CLK

= 32MHz, and f

DATA

= 2MSPS,

unless otherwise noted.

ADS7865

PARAMETER TEST CONDITIONS MIN TYP

(1)

MAX UNIT

INTERNAL VOLTAGE REFERENCE

Resolution Reference output DAC resolution 10 Bits

Over 20% to 100% DAC range 0.496 2.515 V

DAC = 0x3FF,

REFOUT

Reference output voltage 2.485 2.500 2.515 V

–40°C < T

< +125°C

DAC = 0x3FF at +25°C 2.495 2.500 2.505 V

REFOUT

/dT Reference voltage drift ±10 ppm/°C

DNL

DAC

DAC differential linearity error –4 ±1 4 LSB

INL

DAC

DAC integral linearity error –4 ±0.5 4 LSB

OSDAC

DAC offset error V

REFOUT

= 0.5V –4 ±1 4 LSB

PSRR Power-supply rejection ratio 73 dB

REFOUT

Reference output dc current –2 +2 mA

Reference output short-circuit

REFSC

50 mA

current

REFON

Reference output settling time 0.5 ms

VOLTAGE REFERENCE INPUT

REF

Reference input voltage range 0.5 2.525 V

REF

Reference input current 50 μA

REF

Reference input capacitance 10 pF

DIGITAL INPUTS

Logic family CMOS

High-level input voltage 0.7 × BV

+ 0.3 V

Low-level input voltage –0.3 0.3 × BV

Input current V

= BV

to BGND –50 +50 nA

Input capacitance 5 pF

DIGITAL OUTPUTS

Logic family CMOS

High-level output voltage I

= –100μA BV

– 0.2 V

Low-level output voltage I

= 100μA 0.2 V

High-impedance-state output

= BV

to BGND –50 +50 nA

current

Output capacitance 5 pF

Load capacitance 30 pF

1 2 3 4 5 6 7 8 9 ... 32 33

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