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ADS7804U Arkusz danych(PDF) 3 Page - Texas Instruments

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Numer części ADS7804U
Szczegółowy opis  ANALOG-to-DIGITAL CONVERTER
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7804U Arkusz danych(HTML) 3 Page - Texas Instruments

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ADS7804
3
SBAS019A
www.ti.com
ELECTRICAL CHARACTERISTICS (Cont.)
At TA = –40°C to +85°C, fS = 100kHz, and VDIG = VANA = +5V, using internal reference, unless otherwise specified.
ADS7804P, U
ADS7804PB, UB
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
REFERENCE
Internal Reference Voltage
2.48
2.5
2.52
✻✻
V
Internal Reference Source Current
1
µA
(Must use external buffer.)
Internal Reference Drift
8
ppm/
°C
External Reference Voltage Range
2.3
2.5
2.7
✻✻
V
for Specified Linearity
External Reference Current Drain
Ext. 2.5000V Ref
100
µA
DIGITAL INPUTS
Logic Levels
VIL
–0.3
+0.8
✻✻
V
VIH
+2.0
VD +0.3V
✻✻
V
IIL
±10
µA
IIH
±10
µA
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
ISINK = 1.6mA
+0.4
V
VOH
ISOURCE = 500µA+4
V
Leakage Current
High-Z State,
±5
µA
VOUT = 0V to VDIG
Output Capacitance
High-Z State
15
15
pF
DIGITAL TIMING
Bus Access Time
83
ns
Bus Relinquish Time
83
ns
POWER SUPPLIES
Specified Performance
VDIG
Must be
≤ V
ANA
+4.75
+5
+5.25
✻✻
V
VANA
+4.75
+5
+5.25
✻✻
V
+IDIG
0.3
mA
+IANA
16
mA
Power Dissipation
fS = 100kHz
100
mW
TEMPERATURE RANGE
Specified Performance
–40
+85
✻✻
°C
Derated Performance
–55
+125
✻✻
°C
Storage
–65
+150
✻✻
°C
Thermal Resistance (
θ
JA)
Plastic DIP
75
°C/W
SO
75
°C/W
NOTES: (1) LSB means Least Significant Bit. For the 12-bit,
±10V input ADS7804, one LSB is 4.88mV. (2) Typical rms noise at worst case transitions and
temperatures. (3) As measured with fixed resistors shown in Figure 4. Adjustable to zero with external potentiometer. (4) Full scale error is the worst case of –Full
Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the transition voltage (not divided by the full-scale range) and includes
the effect of offset error. (5) All specifications in dB are referred to a full-scale
±10V input. (6) Full-Power Bandwidth defined as Full-Scale input frequency at which
Signal-to-(Noise + Distortion) degrades to 60dB, or 10 bits of accuracy. (7) Recovers to specified performance after 2 x FS input overvoltage.
Parallel 12 Bits
Binary Two’s Complement


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