Required very low power processor for battery operated device

[mrudangshelat1]

Hi,

I am looking for a very low power processor solution for battery-operated medical devices. Earlier I have used i.MX6ULL but the DRAM and eMMC combined MCP package is EOL now and needs to change the processor part to support LPDDR3 or LPDDR4 compatible. It also should have 3xSAI, 4xUART, SPI, and I2C interfaces. I am looking for an i.MX7/8 based solution.

Regards,

Mrudang

[igorpadykov]

Hi Mrudang

one can look at i.MX comparison tables seems i.MX7D best choice:

https://www.nxp.com/docs/en/brochure/FLYRIMXPRDCMPR.pdf 

https://www.nxp.com/docs/en/supporting-information/IMX8LAYERCMPR.pdf 

Best regards
igor
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[mrudangshelat1]

Hi Igor,

We have a 3 x 120mAh battery in current i.MX6ULL+M4 based MT2523 (MediaTek FPU) based device. And it provides battery back-up 9-10 days. Please see below the table of power consumption for your reference. Will i.MX7D can provide such battery back-up? 

Sr#	Peripheral Description	Part#	Manufacturer	Qty	Voltage Rails (Volt)					Component Power (mW)
					1.0	1.8	3.3	3.7	5.0
1	Microprocessor (Cortex A7)	MCIMX6Y1CVK05AA	NXP	1	59.4000		8.6061			100.9700
2	Sensor Hub (Cortex M4)	MT2523D	MediaTek	1				2.0659		8.7906
3	eMMC	MT29PZZZ4D4BKESK-18 W.94H	Micron	1		22.5000	50.0000			236.3250
4	LPDDR2 RAM			1		16.6667				34.5000
5	EEPROM	24AA32A	Microchip	1		0.4000				0.8280
6	M2M Module	LE866	Telit	1				550.0000		2340.2500
7	BLE Module	UGMZ2AA	ALPS	1			6.0000			22.7700
8	6DOF- Acc + Gyro	LSM6DSM	ST Microelectronics	1		0.6500				1.3455
9	3DOF-Magneto	LIS3MDL	ST Microelectronics	1		0.0010	0.2700			1.0267
10	Skin Side Mic-A	MP34DB02TR	ST Microelectronics	1		0.6500				1.3455
11	Mic-A PDM to I2S Con	ADAU7002	Analog Device	1		0.6700				1.3869
12	Skin Side Mic-B	MP34DB02TR	ST Microelectronics	1		0.6500				1.3455
13	Mic-B PDM to I2S Con	ADAU7002	Analog Device	1		0.6700				1.3869
14	Outside Mic	WM7216E	Cirrus Logic	1		0.9800				2.0286
15	Outside Mic PDM to I2S Con	ADAU7002	Analog Device	1		0.0015				0.0031
16	Temperature Sensor	Si7051	Silicon Labs	1			1.1100			4.2125
17	Vibration Actuator	Z4FC1B1301781	KOTL	1			110.0000			417.4500
18	Actuator Driver	DRV8601	Texas Instrument	1			1.7000			6.4515
19	RTC	AM0805	Ambiq Micro	1		0.0033				0.0068
20	Battery Charger	BQ24074	Texas Instrument	1				5.0000	2.0000	32.7750
21	Fuel Gauge	MAX17050	Maxim Integrated	1				0.0250		0.1064
22	PMIC	MC32PF3000A6EP	NXP	1				2.0000		8.5100
23	Push Button	SW1, SW2, SW3		3		1.0000				6.2100
24	LEDs	LED1, LED2, LED3		3			2.0000			22.7700
			Max Rail Current Requirement		59.4000	44.8425	179.6861	559.0909	2.0000
	Total System Power Consumption(mW)									3252.7945

Regards,

Mrudang

[igorpadykov]

Hi Mrudang

some typical power consumption figures can be found in

i.MX 7DS Power Consumption Measurement

However for your specific case you should produce prototype board

and measure power consumption for specific application requirements.

Best regards
igor

[mrudangshelat1]

Hi Igor,

So, I can use iMX7S, right?

Mrudang

[igorpadykov]

yes Mrudang

Best regards
igor

[mrudangshelat1]

Hi Igor,

Let me check and let you know ASAP.

Mrudang