2

®

DAC1221

SPECIFICATIONS

All specifications TMIN to TMAX, AVDD = DVDD = +3V, fXIN = 2.5MHz, VREF = +1.25V, C1 = 2.2nF, C2 = 150pF, C3 = 6.8nF, unless otherwise noted.

DAC1221E

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ACCURACY

Monotonicity

16

Bits

Linearity Error(1)

±30

ppm of FSR

Offset Error(2)

VOUT = 20mV, CALPIN = 1(6)

±190

µV

Offset Error Drift(3)

50

µV/°C

Midscale Error(2)

VOUT = VREF, CALPIN = 1(6)

±20

µV

Midscale Error Drift(3)

50

µV/°C

Gain Error(2)

CALPIN = 1(6)

0.015

%

Gain Error Drift(3)

3

ppm/

°C

Power-Supply Rejection Ratio

at DC, dB = –20log(

∆V

OUT/∆VDD)57

dB

ANALOG OUTPUT

Output Voltage(4)

0

2 • VREF

V

Output Current(1)

±0.25

mA

Capacitive Load

500

pF

Short-Circuit Current

±10

mA

Short-Circuit Duration

GND or VDD

Indefinite

DYNAMIC PERFORMANCE

Settling Time(1,5)

To

±0.012%

1.8

2

ms

Output-Noise Voltage

1Hz to 2kHz

45

µVrms

REFERENCE INPUT

Input Voltage

1.125

1.25

1.375

V

Input Impedance

1M

Ω

DIGITAL INPUT/OUTPUT

Logic Family

TTL-Compatible CMOS

Logic Levels (all except XIN)

VIH

2.0

DVDD + 0.3

V

VIL

–0.3

0.8

V

VOH

IOH = –0.8mA

2.4

V

VOL

IOL = 1.6mA

0.4

V

Input-Leakage Current

±10

µA

XIN Frequency Range (fXIN)

1.0

2.5

MHz

Data Format

User Programmable

Offset Two’s Complement

or Straight Binary

POWER SUPPLY REQUIREMENTS

Power-Supply Voltage

2.7

3.3

V

Supply Current

Analog Current

320

µA

Digital Current

70

µA

Power Dissipation

Normal Mode

1.2

1.6

mW

Sleep Mode

0.25

mW

TEMPERATURE RANGE

Specified Performance

–40

+85

°C

NOTES: (1) Valid from AGND + 20mV to 2 • VREF. (2) Applies after calibration. (3) Recalibration can remove these errors. (4) Ideal output voltage. (5) Using external

low-pass filter with 2kHz corner frequency. (6) See Command Register for description of CALPIN.