LMP92018_14 Datasheet, PDF (1/34 Pages) Texas Instruments – LMP92018 Analog System Monitor and Controller

LMP92018
www.ti.com
SNAS514B – NOVEMBER 2011 – REVISED MAY 2013
LMP92018 Analog System Monitor and Controller
Check for Samples: LMP92018
FEATURES
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
APPLICATIONS
• 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 Digital-
to-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]
8
VDD
OUT3
OUT0
Multiplexer
Temp. Sensor
LMP92018
Int/Ext
Ref
GPIO
12
REF
GPIO[11:0] VGPIO
SPI
Interface
4
CSB
SCLK
DIN
DOUT
DRDYB VIO
GND
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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