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ADC10734 Fiches technique(PDF) 4 Page - Texas Instruments

No de pièce ADC10734
Description  10-Bit Plus Sign Serial I/O A/D Converters with Mux, Sample/Hold and Reference
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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ADC10731, ADC10732, ADC10734, ADC10738
SNAS081D – MAY 1999 – REVISED MARCH 2013
www.ti.com
Table 1. Pin Descriptions (continued)
Pin Name
Description
This pin is another analog input pin. It can be used as a “pseudo ground” when the analog
COM
multiplexer is single-ended.
This is the positive analog voltage reference input. In order to maintain accuracy, the voltage
VREF+
range VREF (VREF = VREF+–VREF−) is 0.5 VDCto 5.0 VDC and the voltage at VREF+ cannot
exceed AV+ +50 mV.
The negative voltage reference input. In order to maintain accuracy, the voltage at this pin
VREF
must not go below GND
− 50 mV or exceed AV+ + 50 mV.
These are the analog and digital power supply pins. These pins should be tied to the same
AV+, DV+
power supply and bypassed separately. The operating voltage range of AV+ and DV+ is
4.5 VDC to 5.5 VDC.
DGND
This is the digital ground pin.
AGND
This is the analog ground pin.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1) (2) (3)
Supply Voltage (V+ = AV+ = DV+)
6.5V
Total Reference Voltage (VREF+–VREF−)
6.5V
Voltage at Inputs and Outputs
V+ + 0.3V to
−0.3V
Input Current at Any Pin(4)
30 mA
Package Input Current(4)
120 mA
Package Dissipation at TA = 25°C
(5)
500 mW
Human Body Model
2500V
ESD Susceptibility(6)
Machine Model
150V
N packages (10 seconds)
260°C
Soldering Information
Vapor Phase (60 seconds)
215°C
SOIC Package
Infrared (15 seconds)
220°C
Storage Temperature
−40°C to +150°C
(1)
All voltages are measured with respect to GND, unless otherwise specified.
(2)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
(3)
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(4)
When the input voltage (VIN) at any pin exceeds the power supplies (VIN < GND or VIN > AV
+ or DV+), the current at that pin should be
limited to 30 mA. The 120 mA maximum package input current rating limits the number of pins that can safely exceed the power
supplies with an input current of 30 mA to four.
(5)
The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax, θJA and the ambient temperature,
TA. The maximum allowable power dissipation at any temperature is PD = (TJmax − TA)/θJA or the number given In the Absolute
Maximum Ratings, whichever is lower. For this device, TJmax = 150°C. The typical thermal resistance (θJA) of these Paris when board
mounted can be found in the following Power Dissipation table:
(6)
The human body model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin.
Operating Ratings
(1) (2)
Operating Temperature Range
TMIN ≤ TA ≤ TMAX
−40°C ≤ TA ≤ +85°C
Supply Voltage (V+ = AV+ = DV+)
+4.5V to +5.5V
VREF+
AV+ +50 mV to
−50 mV
VREF
AV+ +50 mV to
−50 mV
VREF (VREF+–VREF−)
+0.5V to V+
(1)
Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. For ensured
specifications and test conditions, see the Electrical Characteristics table. The ensured specifications apply only for the test conditions
listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
(2)
All voltages are measured with respect to GND, unless otherwise specified.
4
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Product Folder Links: ADC10731 ADC10732 ADC10734 ADC10738


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