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DAC1282IPWR データシート(PDF) 4 Page - Texas Instruments

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部品番号 DAC1282IPWR
部品情報  LOW DISTORTION DIGITAL-TO-ANALOG CONVERTER FOR SEISMIC
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

DAC1282IPWR データシート(HTML) 4 Page - Texas Instruments

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DAC1282
SBAS490
– DECEMBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Minimum/maximum specifications are at TA = –40°C to +85°C. Typical specifications are at TA = +25°C, AVDD = +2.5 V,
AVSS =
–2.5 V, fCLK = 4.096 MHz, VREF = 5 V, and DVDD = 3.3 V, unless otherwise noted. Refer to Figure 50.
DAC1282
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PULSE MODE
Output levels
31 steps, approximate 3 dB per step
±0.0195
±2.5
V
Gain error
±0.1
±0.75
%
Gain drift
3
ppm/
°C
Offset
±0.5
±3
mV
Offset drift
3
µV/°C
Output noise(7)
1.5
µVRMS
Slew rate
5
V/
µs
Settling time
0.1% final value
25
µs
DC MODE
Resolution
24
Bits
Step response
100
µs
Gain = 1/1
1.3
µVRMS
Gain = 1/2
1.4
µVRMS
Gain = 1/4
1.8
µVRMS
DC noise(8)
Gain = 1/8
2.7
µVRMS
Gain = 1/16
4.7
µVRMS
Gain = 1/32
8.5
µVRMS
Gain = 1/64
16
µVRMS
DIGITAL DATA MODE
Data clock rate
fCLK/16
Hz
Ones-density full-scale modulation
+FS and
–FS, respectively
25
75
%
Signal bandwidth
–3 dB
8.2
kHz
REFERENCE VOLTAGE INPUT (VREF)
Reference voltage, VREF = VREF – AVSS
2.4
5
AVDD + 0.25
V
Operating
220
k
Ω
Reference input impedance
Power-down
10
M
Ω
SIGNAL SWITCH
Signal range
AVSS
AVDD
V
Current
Continuous
±50
mA
Differential on-resistance
VSWIN , VSWOUT = 0 V
2.8
Ω
Differential on-resistance flatness
VSWIN, VSWOUT = AVDD to AVSS
0.7
Ω
On-resistance match between outputs
VSWIN , VSWOUT = 0 V
0.04
Ω
TA = +25°C
±0.1
Off-leakage current(9)
nA
TA = +85°C
±5
Off-isolation(10)
120
dB
DIGITAL INPUT/OUTPUT (DVDD = 1.65 V to 3.6 V)
VOH
IOH = 1 mA
0.8
× DVDD
V
VOL
IOL = 1 mA
0.2
× DVDD
V
VIH
0.8
× DVDD
DVDD
V
VIL
DGND
0.2
× DVDD
V
Input hysteresis
0.5
V
Input leakage
±10
µA
fCLK
CLK Input
1
4.096
4.225
MHz
(7)
VOUT = 0 V. Pulse mode output noise is measured by the ADS1282, over a 413-Hz bandwidth using ADC gain = 1.
(8)
VOUT = 0 V. DC noise is measured by the ADS1282, over a 413-Hz bandwidth using complementing gain. DC noise is referred to a
1.77-V full-scale ADC output. Divide output-referred noise by the ADC gain to yield input-referred noise.
(9)
Switch input or output voltage = AVDD
– 0.5 V to AVSS + 0.5 V.
(10) f = 31.25 Hz, 1.77 VRMS. Switch output loaded 2 x 10 kΩ to mid-supply range.
4
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© 2011, Texas Instruments Incorporated
Product Folder Link(s): DAC1282


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