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Part Number: SPT774
Description: The SPT774 is a complete,12-bit successive approximation A/D converter manufactured in CMOS technology...
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SPT774
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DataSheet
General Description
SPT774 General Description
The SPT774 is a complete,12-bit successive approximation A/D converter manufactured in CMOS technology.The de-vice is an improved version of the HADC574Z.Included on chip are an internal reference,clock,and a sample-and-hold.The S/H is an additional feature not available on similar
devices.
The SPT774 features 8 µs (max) conversion time of 10 or 20 V input signals. Also,a three-state output buffer is added for direct interface to an 8-, 12-or 16-bit µP bus.
The SPT774 has standard bipolar and unipolar input ranges of 10 V and 20 V that are controlled by a bipolar offset pin and laser trimmed for specified linearity,gain and offset accuracy.
The power supply is +5 V. The device also has an optional mode control voltage which may be used depending on the application. With a maximum dissipation of 120 mW at the specified voltages, power consumption is about five times lower than that of currently available devices.
The SPT774 is available in 28-lead ceramic sidebrazed DIP,PDIP and SOIC packages in the commercial temperature range.
SPT774 Maximum Ratings
Supply Voltages
Mode Control Voltage (VEE to DGND) ....................0 to +7 V
Logic Supply Voltage (VDD to DGND) ...................0 to +7 V
Analog to Digital Ground (AGND to DGND) .................±1 V
Input Voltages
Control Input Voltages (to DGND)
(CE, CS, Ao, 12/8, R/C) ......................... -0.5 to VDD +0.5 V
Analog Input Voltage (to AGND)
(REF IN, BIP OFF, 10 VIN) ......................................±16.5 V
20 V VIN Input Voltage (to AGND) ..............................±24 V
Output
Reference Output Voltage .............. Indefinite Short to GND
Momentary Short to VDD
Temperature
Operating Temperature, Ambient .................... 0 to +70 °C
Junction ......................... +165 °C
Lead Temperature, (Soldering 10 Seconds) ........... +300 °C
Storage Temperature .................................... -65 to +150 °C
Mode Control Voltage (VEE to DGND) ....................0 to +7 V
Logic Supply Voltage (VDD to DGND) ...................0 to +7 V
Analog to Digital Ground (AGND to DGND) .................±1 V
Input Voltages
Control Input Voltages (to DGND)
(CE, CS, Ao, 12/8, R/C) ......................... -0.5 to VDD +0.5 V
Analog Input Voltage (to AGND)
(REF IN, BIP OFF, 10 VIN) ......................................±16.5 V
20 V VIN Input Voltage (to AGND) ..............................±24 V
Output
Reference Output Voltage .............. Indefinite Short to GND
Momentary Short to VDD
Temperature
Operating Temperature, Ambient .................... 0 to +70 °C
Junction ......................... +165 °C
Lead Temperature, (Soldering 10 Seconds) ........... +300 °C
Storage Temperature .................................... -65 to +150 °C
SPT774 Features
• Improved Higher Performance Version of the HADC574Z
• Complete 12-Bit A/D Converter with Sample/Hold,Reference and Clock
• Low Power Dissipation (120 mW Max)
• 12-Bit Linearity (Over Temp)
•8 µs Max Conversion Time
• Single +5 V Supply
• Full Bipolar and Unipolar Input Range
SPT774 Typical Application
• Data Acquisition Systems
• 8 or 12-Bit µP Input Functions
• Process Control Systems
• Test and Scientific Instruments
• Personal Computer Interface
SPT774 Connection Diagram
SPT774
PDF/DataSheet Download
- Datasheet: SPT774
- File Size: 116547 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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