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15 pcs
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15 pcs | On Request | 1 | On Request | On Request | 15+ | On Request | On Request |
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The AD8451ASTZ from Analog Devices is a precision analog front end and controller designed for battery cell testing and formation systems. It integrates a fixed-gain instrumentation amplifier (IA) for current sensing with a gain of 26 V/V and a fixed-gain difference amplifier (DA) for voltage sensing with a gain of 0.8 V/V. Internal laser-trimmed resistor networks ensure stable gain performance over the rated temperature range.
The device supports both constant current (CC) and constant voltage (CV) modes with automatic switchover, simplifying system design. A TTL logic input selects charge or discharge mode. The analog output VCTRL interfaces directly with PWM controllers such as the ADP1972.
The AD8451ASTZ is housed in an 80-lead LQFP package (14 mm x 14 mm) and is rated for an operating temperature range of -40°C to +85°C. It operates with an analog supply voltage of 5V to 36V and a digital supply voltage of 3V to 5V. Key performance characteristics include a maximum offset voltage drift of 0.9 µV/°C, maximum gain drift of 3 ppm/°C, current sense input voltage noise of 9 nV/√Hz typical, and a minimum current sense CMRR of 108 dB.
The AD8451ASTZ is rated for an operating temperature range of -40°C to +85°C.
The AD8451ASTZ is available in an 80-lead LQFP package (14 mm x 14 mm).
The analog supply voltage range is 5V to 36V, and the digital supply voltage range is 3V to 5V.
The fixed current sense gain is 26 V/V typical.
The fixed voltage sense gain is 0.8 V/V typical.