Power input

Applicable receivers:  BD982

Item

Description

Power requirement

The unit operates at 3.3 V +5%/-3%.

The 3.3 V should be able to supply 2 A of surge current.

Additional integration notes –

  1. To fully protect against the unit resetting while shorting any antenna output, Trimble recommends that the 3.3 V input be rated at least 3.5 A. Power supplies under 3.5 A will lead to the 3.3 V rail drooping, triggering a reset to the system.

  2. Worst case operation requires a 3 A supply. Worst case operation is defined as: both antennas supplying 5 V at 100 mA, USB supplying 5 V at 250 mA, and actively using all RF bands.

The typical power consumption based on band usage is:

  • L1/L2 = 2.08 W

  • L1/L2/G1/G2 = 2.24 W

  • L1/L2/G1/G2/SBAS = 2.27 W

  • L1/L2/G1/G2/SBAS/L5 = 2.54 W

  • L1/L2/G1/G2/SBAS/L5/Galileo= 2.79 W

  • L1/L2/G1/G2/SBAS/L5/Galileo + Omnistar = 3.10 W

Power switch

Pin 3 is an optional power-off pin. When driven high with 3.3 V, the receiver is powered off. This unit can be left floating or ground to keep the unit on. System integrators should not drive TTL signals when unit is not powered.

Over-voltage protection

The absolute maximum voltage is 3.6 V.

Under-voltage protection

The absolute minimum voltage is 3.2 V below nominal.

Reverse voltage protection

The unit is protected down to -3.6 V.