STM32L162QD STMicroelectronics, STM32L162QD Datasheet - Page 22

• Manufacturer Part Number: STM32L162QD
• Description: Ultra-low-power ARM Cortex-M3 MCU with 384 Kbytes Flash, 32 MHz CPU, LCD, USB, 3xOp-amp, AES
• Manufacturer: STMicroelectronics

Specifications of STM32L162QD

• Operating Power Supply Range: 1.65 V to 3.6 V (without BOR) or 1.8 V to 3.6 V
• 7 Modes: Sleep, Low-power run (11 μA at 32 kHz), Low-power sleep (4.4 μA), Stop with RTC, Stop (650 nA), Standby with RTC, Standby (300 nA)
• Ultralow Leakage Per I/o: 50 nA max
• Fast Wakeup Time From Stop: 8 μs
• Core: ARM 32-bit Cortex™-M3 CPU
• Dma: 12-channel DMA controller
• 11 Timers: one 32-bit and six 16-bit general-purpose timers, two 16-bit basic timers, two watchdog timers (independent and window)

Functional overview
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DAC (digital-to-analog converter)
The two 12-bit buffered DAC channels can be used to convert two digital signals into two
analog voltage signal outputs. The chosen design structure is composed of integrated
resistor strings and an amplifier in non-inverting configuration.
This dual digital Interface supports the following features:
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Eight DAC trigger inputs are used in the STM32L162xD. The DAC channels are triggered
through the timer update outputs that are also connected to different DMA channels.
Operational amplifier
The STM32L162xD embeds three operational amplifiers with external or internal follower
routing capability (or even amplifier and filter capability with external components). When
one operational amplifier is selected, one external ADC channel is used to enable output
measurement.
The operational amplifiers feature:
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Ultralow power comparators and reference voltage
The STM32L162xD embeds two comparators sharing the same current bias and reference
voltage. The reference voltage can be internal or external (coming from an I/O).
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Both comparators can wake up from Stop mode, and be combined into a window
comparator.
The internal reference voltage is available externally via a low power / low current output
buffer (driving current capability of 1 µA typical).
Two DAC converters: one for each output channel
Up to 10-bit output
Left or right data alignment in 12-bit mode
Synchronized update capability
Noise-wave generation
Triangular-wave generation
Dual DAC channels’ independent or simultaneous conversions
DMA capability for each channel (including the underrun interrupt)
External triggers for conversion
Input reference voltage V
Low input bias current
Low offset voltage
Low power mode
Rail-to-rail input
One comparator with fixed threshold
One comparator with rail-to-rail inputs, fast or slow mode. The threshold can be one of
the following:
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DAC output
External I/O
Internal reference voltage (V
STM32L162VD, STM32L162ZD, STM32L162QD, STM32L162RD
Doc ID 022268 Rev 2
REF+
REFINT
) or a submultiple (1/4, 1/2, 3/4)