• Positive Supply Voltage 4.75 V to 5.5 V
• Negative Supply Voltage −5.5 V to −4 V
• Positive Supply Current 750 µA (max)
• VBATT = (VSENSE(N) − VSENSE(N−1)) 0.5 V to 4.6 V
• VSENSE(14) 60 V (max)
• Input Sense Current 6 µA (max)
• Input Referred Offset Voltage ±1 mV (Max)
• Digital Interface Supply 2.7 V to 5.5 V
• Gain 1
• Gain Error 0.05% (max)
• Ambient Operating Temperature −40°C to 125°C
• AEC Q100 Grade 1

• Li-Ion Battery Management Systems
• Hybrid and Electric Vehicles
• Grid Storage
• 48 V Systems
• UPS

The EMB1432Q Battery Stack Module Analog Front End is a high voltage analog interface designed to monitor a lithium battery stack. It is able to select and level shift the voltage across any of 14 stacked batteries and 2 low voltage auxiliary inputs, multiplexing the signals to an output pin. The multiplexer output is set by writing to an internal register using the SPI™ protocol or by directly addressing 4 digital pins. The voltage across each battery can range from –2 V to 5.5 V without damaging the AFE, with the top cell positive pin reaching 60 V. The SENSE(N) input impedance (when the Nth battery is selected) is 1 MΩ typ, and the current drawn from SENSE(N-1) is 2 µA typ. When not selected or in shutdown mode, the current at any sense input drops to less than 1 µA.

The EMB1432Q can precisely level shift a battery voltage ranging from 0.5 V to 4.6 V with a gain of 1, an input referred offset voltage of ±1 mV and a gain error of 0.05% (max). The EMB1432Q operates with 5 V and –5 V supplies. Single supply operation is also supported: the –5 V supply can be internally generated using an internal charge pump. The I/O communication interface can be supplied through dedicated supply pins (VIO, DGND). The EMB1432Q is designed to provide accurate analog output over the AEC-Q100 type 2 temperature range of –40°C to 105°C and to be able to operate up to 125°C.