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DAC122K5 数据表(PDF) 3 Page - Texas Instruments

部件名 DAC122K5
功能描述  20-Bit, Low-Power Digital-to-Analog Converter
Download  26 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

DAC122K5 数据表(HTML) 3 Page - Texas Instruments

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DAC1220
www.ti.com...................................................................................................................................... SBAS082G – FEBRUARY 1998 – REVISED SEPTEMBER 2009
ELECTRICAL CHARACTERISTICS
All specifications at TMIN to TMAX, AVDD = DVDD = +5V, fXIN = 2.5MHz, VREF = +2.5V, and 16-bit mode, unless otherwise noted.
DAC1220E
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
ACCURACY
Monotonicity
16
Bits
Monotonicity
20-bit mode
20
Bits
Linearity error
±15(1)
ppm of FSR
Unipolar offset error and gain error(2)
±60
ppm of FSR
Unipolar offset error drift(3)
1
ppm/°C
Bipolar zero offset error(2)
VOUT = VREF
±15
ppm of FSR
Bipolar zero offset drift(3)
1
ppm/°C
Gain error(2)
±150
ppm of FSR
Gain error drift(3)
2
ppm/°C
Power-supply rejection ratio (PSRR)
at DC, dB = –20log(
ΔVOUT/ΔVDD)
60
dB
ANALOG OUTPUT
Output voltage(4)
0
2 × VREF
V
Output current
0.5
mA
Capacitive load
500
pF
Short-circuit current
±20
mA
Short-circuit duration
GND or VDD
Indefinite
DYNAMIC PERFORMANCE
Settling time(5)
To ±0.012%
1.8
2
ms
20-bit mode, to ±0.003%
15
ms
Output noise voltage
0.1Hz to 10Hz
1
μVRMS
REFERENCE INPUT
Input voltage
2.25
2.5
2.75
V
Input impedance
100
k
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
3.6
V
VOL
IOL = 1.6mA
0.4
V
Input-leakage current
±10
μA
XIN frequency range (fXIN)
0.5
2.5
MHz
Offset binary two's complement
Data format
User-programmable
or straight binary
POWER-SUPPLY REQUIREMENTS
Power-supply voltage
4.75
5.25
V
Supply current
Analog current
360
μA
Digital current
140
μA
Analog current
20-bit mode
460
μA
(1)
Valid from AGND + 20mV to AVDD – 20mV.
(2)
Applies after calibration.
(3)
Recalibration can remove these errors.
(4)
Ideal output voltage; does not take into account gain and offset error.
(5)
Valid from AGND + 20mV to AVDD – 20mV. Outside of this range, settling time can be twice the value indicated.
For 16-bit mode, C1 = 2.2nF, C2 = 0.22nF; for 20-bit mode, C1 = 10nF, C2 = 3.3nF.
Copyright © 1998–2009, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Link(s): DAC1220


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