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The LTC®1598 is an 8-channel, 5V micropower, 12-bit sampling A/D converter. It typically draws only 320mA of supply current when converting and automatically powers down to typically 1nA between conversions. The LTC1598 is available in a 24-pin SSOP package and operates on a 5V supply. The 12-bit, switched-capacitor, successive approximation ADC includes an 8-channel MUX and a sample-and-hold.
On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three or four wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data through isolation barriers.
The circuit can be used in ratiometric applications or with an external reference. The high impedance analog inputs and the ability to operate with reduced spans (to 1.5V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages.
LTC1598 Maximum Ratings
(Notes 1, 2) Supply Voltage (VCC) to GND ................................... 12V Voltage Analog Reference .................... 0.3V to (VCC + 0.3V) Analog Inputs .......................... 0.3V to (VCC + 0.3V) Digital Inputs ..........................................0.3V to 12V Digital Output ........................... 0.3V to (VCC + 0.3V) Power Dissipation................................................ 500mW Operating Temperature Range LTC1598CG ................................................. 0 to 70 LTC1598IG ............................................. 40to 85 Storage Temperature Range ................... 65 to 150 Lead Temperature (Soldering, 10 sec)..................... 300
LTC1598 Features
· 12-Bit Resolution ·Auto Shutdown to 1nA · Low Supply Current: 320mA Typ · Guaranteed ±3/4LSB Max DNL · Single Supply 5V Operation ·8-Channel Multiplexer · Separate MUX Output and ADC Input Pins · MUX and ADC May Be Controlled Separately · Sampling Rate: 16.8ksps · I/O Compatible with SPI, MICROWIRETM, etc. ·24-Pin SSOP Package
LTC1598 Typical Application
·Pen Screen Digitizing · Battery-Operated Systems · Remote Data Acquisition ·Isolated Data Acquisition ·Battery Monitoring ·Temperature Measurement