MAX14920ECB+ by Analog Devices

High-Accuracy 12-/16-Cell Measurement AFEs

Status: Active
Series: MAX14920
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14920/MAX14921 battery measurement analog front-end devices accurately sample cell voltages and provide level shifting for primary/secondary battery packs up to 16 cells/+65V (max). The MAX14920 monitors up to 12 cells, while the MAX14921 monitors up to 16 cells. Both devices simultaneously sample all cell voltages, allowing accurate state-of-charge and source-resistance determination. All cell voltages are level shifted to ground reference with unity gain, simplifying external ADC data conversion. The devices have a low-noise, low-offset amplifier that buffers differential voltages of up to +5V, allowing monitoring of all common lithium-ion (Li+) cell technologies. The resulting cell voltage error is ±0.5mV. The devices’ high accuracy make them ideal for monitoring cell chemistries with very flat discharge curves, such as lithium-metal phosphate. Passive-cell balancing is supported by external FET drivers. Integrated diagnostics in the devices allow open-wire detection and undervoltage/overvoltage alarms. The devices are controlled by a daisy-chainable SPI interface. The MAX14920 is available in a 64-pin (10mm x 10mm) TQFP package with an exposed pad. The MAX14921 is available in an 80-pin (12mm x 12mm) TQFP package. Both devices are specified over the -40°C to +85°C extended temperature range.

Where to Buy

Prices starting from US$7.89

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from US$7.89
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in stock
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Features

High Accuracy ±0.5mV (max) Cell Voltage Error Simultaneous Cell Voltage Sampling Self-Calibration
±0.5mV (max) Cell Voltage Error
Simultaneous Cell Voltage Sampling
Self-Calibration
Integrated Diagnostics Open-Wire and Short Fault Detection Undervoltage/Overvoltage Warning Thermal Shutdown
Open-Wire and Short Fault Detection
Undervoltage/Overvoltage Warning
Thermal Shutdown
High Flexibility SPI Interface 12-Cell and 16-Cell Versions +6V Minimum (3 Cells) Operation +0.5V to +4.5V Cell Voltage Range Integrated Cell-Balancing FET Drivers Integrated 5V LDO
SPI Interface
12-Cell and 16-Cell Versions
+6V Minimum (3 Cells) Operation
+0.5V to +4.5V Cell Voltage Range
Integrated Cell-Balancing FET Drivers
Integrated 5V LDO
Low Power 1µA Shutdown Mode 1µA/10µA Cell Current Draw
1µA Shutdown Mode
1µA/10µA Cell Current Draw

Specifications

Functions Status Monitor
Battery Type 3-12 Cell Li-Ion
Interface SPI
Parameters Measured TemperatureVoltage
End Equipment Pack
Battery Protection Features Over-TemperatureOver/Under Voltage
VSUPPLY (V) (min) 6
VSUPPLY (V) (max) 65
Package/Pins TQFP/64
Oper. Temp. (°C) -40 to +85
BudgetaryPrice (See Notes) 6.11

Last 6 months Inventory & Pricing History

MAX14920ECB+ - Integrated Circuits by Analog Devices

ANALOGUE FRONT END DEVICE TQFP-64

Semiconductors - ICs
> Special Function
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14920/MAX14921 battery measurement analog front-end devices accurately sample cell voltages and provide level shifting for primary/secondary battery packs up to 16 cells/+65V (max). The MAX14920 monitors up to 12 cells, while the MAX14921 monitors up to 16 cells. Both devices simultaneously sample all cell voltages, allowing accurate state-of-charge and source-resistance determination. All cell voltages are level shifted to ground reference with unity gain, simplifying external ADC data conversion. The devices have a low-noise, low-offset amplifier that buffers differential voltages of up to +5V, allowing moni- toring of all common lithium-ion (Li+) cell technologies. The resulting cell voltage error is Q0.5mV. The devices’ high accuracy make them ideal for monitoring cell chemistries with very flat discharge curves, such as lithium-metal phosphate. Passive-cell balancing is supported by external FET drivers. Integrated diagnostics in the devices allow open-wire detection and undervoltage/overvoltage alarms. The devices are controlled by a daisy-chainable SPI interface. The MAX14920 is available in a 64-pin (10mm x 10mm) TQFP package with an exposed pad. The MAX14921 is available in an 80-pin (12mm x 12mm) TQFP package. Both devices are specified over the -40°C to +85°C extended temperature range.

Specifications

IC Function Analogue Front End Device
Supply Voltage Min 6V
Supply Voltage Max 65V
IC Package Type TQFP
No. of Pins 64Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 3 - 168 hours
SVHC No SVHC (15-Jan-2018)

Last 6 months Inventory & Pricing History

Alternative Descriptions

High-Accuracy 12-/16-Cell Meas | Analog Devices
AFE, SPI, 65V | element14

Frequently Asked Questions

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This part has not been flagged as RoHS Compliant.

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