LMP92018SQ/NOPB

LMP92018 www.ti.com SNAS514B – NOVEMBER 2011 – REVISED MAY 2013 LMP92018 Analog System Monitor and Controller Check for Samples: LMP92018 FEATURES APPLICATIONS • • • • 1 2 • • • • • 8 ANALOG VOLTAGE MONITORING CHANNELS – 10-Bit ADC with Programmable Input MUX – Internal/External Reference – Tolerates High-Source Impedance at Lower Sampling Rates 4 PROGRAMMABLE ANALOG VOLTAGE OUTPUTS – Four 10-Bit DACs – Internal/External Reference – Drives Loads up to 1nF VOLTAGE REFERENCE – User-Selectable Source: External or Internal – Internal Reference 2.5V TEMPERATURE SENSOR – ±2.5°C Accuracy 12-BIT GPIO PORT – Each Bit Individually Programmable – User-Selectable Rail SPI-COMPATIBLE BUS – User-Selectable Rail Communication Infrastructure System Monitoring and Control Industrial Monitoring and Control DESCRIPTION LMP92018 is a complete analog monitoring and control circuit which integrates an eight channel 10-bit Analog-to-Digital Converter (ADC), four 10-bit Digitalto-Analog Converters (DACs), an internal reference, an internal temperature sensor, a12-bit GPIO port, and a 10MHz SPI interface. The eight channels of the ADC can be used to monitor rail voltages, current sense amplifier outputs, health monitors or sensors while the four DACs can be used to control PA (Power Amplifier) bias points, control actuators, potentiometers, etc. Both the ADC and DACs can use either the internal 2.5V reference or an external reference independently allowing for flexibility in system design. The built-in digital temperature sensor enables accurate (±2.5°C) local temperature measurement whose value is captured in the user accessible register. Block Diagram IN[7:0] OUT3 VDD OUT0 8 DAC DAC DAC DAC Multiplexer ADC Temp. Sensor Int/Ext Ref LMP92018 SPI Interface GPIO 4 12 REF GPIO[11:0] VGPIO CSB SCLK DIN DOUT DRDYB VIO GND 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2011–2013, Texas Instruments Incorporated LMP92018 SNAS514B – NOVEMBER 2011 – REVISED MAY 2013 www.ti.com DESCRIPTION (CONTINUED) The LMP92018 also includes a 12-bit GPIO port which allows for the resources of the microcontroller to be further extended, thus providing even more flexibility and reducing the number of signal interfacing to the microcontroller. Both the GPIO port and the SPI compatible interface have independent supply pins enabling the LMP92018 to interface with low voltage microcontrollers. The LMP92018 is available in a space saving 36-pin WQFN package and is specified over the full -30°C to +85°C temperature range. Typical Application 5V 48V 5V VDD REF IN[7:0] Scaled Voltage Sensing Ratiometric Sensing Voltage Sense Channels 8 LM94023 LMP8640 1.8V Temp VIO Analog Sensors Current sensing ROUT