DAC7821 datasheet(3/18 Pages) TI

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ELECTRICAL CHARACTERISTICS

DAC7821

SBAS365A – OCTOBER 2005 – REVISED FEBRUARY 2006

DD = +2.5 V to +5.5 V; IOUT1 = Virtual GND; IOUT2 = 0V; VREF = +10 V; TA = full operating temperature. All specifications

–40

°C to +125°C, unless otherwise noted.

DAC7821

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

STATIC PERFORMANCE

Resolution

Bits

Relative accuracy

±1

LSB

Differential nonlinearity

±1

LSB

Output leakage current

Data = 000h, TA = +25°C

±10

Output leakage current

Data = 000h, TA = TMAX

±20

Full-scale gain error

All ones loaded to DAC register

±5

±10

Full-scale tempco

±5

ppm/

°C

Output capacitance

Code dependent

REFERENCE INPUT

VREF range

–15

Input resistance

Ω

RFB resistance

Ω

LOGIC INPUTS AND OUTPUT(1)

Input low voltage

VIL VDD = +2.7V

0.6

VIL VDD = +5V

0.8

Input high voltage

VIH VDD = +2.7V

2.1

VIH VDD = +5V

2.4

Input leakage current

IIL

µA

Input capacitance

CIL

POWER REQUIREMENTS

VDD

2.7

5.5

IDD (normal operation)

Logic inputs = 0 V

µA

VDD = +4.5 V to +5.5 V

VIH = VDD and VIL = GND

0.8

µA

VDD = +2.5 V to +3.6 V

VIH = VDD and VIL = GND

0.4

2.5

µA

AC CHARACTERISTICS

Output voltage settling time

0.2

µs

Reference multiplying BW

VREF = 7 VPP, Data = FFFh

MHz

VREF = 0 V to 10 V,

DAC glitch impulse

nV-s

Data = 7FFh to 800h to 7FFh

Feedthrough error VOUT/VREF

Data = 000h, VREF = 100kHz

–70

Digital feedthrough

nV-s

Total harmonic distortion

–105

Output spot noise voltage

nV/

√Hz

(1)

Specified by design and characterization; not production tested.

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