Overview
The A300 is a logic-level shifter and voltage converter. It provides two level-shifting channels: the first converting 5 V to 3.3 V, and the second converting 3.3 V to 5 V. Additionally, the A300 provides a regulated 3.3 V power output.
The A300 is commonly used when connecting the pulse-per-second (PPS) output of a GPS16X-HVS to a CR800-series, CR1000, or CR3000 datalogger. In 2014, Garmin changed the PPS output of the GPS16X-HVS from 5 V to 3 V. Units with a serial number 1A4189318 or greater have a PPS output of 0 to 3 V. For those units, an A300 is needed to connect the PPS output to a CR800-series, CR1000, or CR3000 datalogger. Those data loggers require the PPS line to have a voltage of 3.8 V or greater.
Images
Specifications
| -NOTE- | For a cable and terminal description, refer to the Installation section of the A300 manual. |
| Cable | 30.48 cm (12 in.), 4 conductor, 22 AWG, Santoprene |
| Terminals | 4 screw terminals, 12 to 24 AWG, 0.2 in. pitch |
| Mounting | 2 mounting holes (1 in. on center), 1.9 mm (0.075 in.) diameter |
| Packaging | Wide temperature polyamide over-mold |
| Temperature | -40° to +70°C |
| Supply Voltage | 9 to 16 Vdc (for 12 Vdc nominal systems) |
| Supply Current | 100 μA (quiescent) |
| Power Output | 3.3 Vdc, ±3%, up to 20 mA guaranteed |
| 5 V Signal Input | 0 to 6 Vdc, logic low ≤ 1.4 V, logic high ≥ 3.4 V |
| 5 V Signal Output | 5 Vdc, ±3%, 600 ohm output impedance |
| 3 V Signal Input | 0 to 6 Vdc, logic low ≤ 0.8 V, logic high ≥ 2 V |
| 3 V Signal Output | 3 Vdc ±3%, 600 ohm output impedance |
| Maximum Voltage Translation Rate | 210 Mbps |
| Dimensions | 78 x 46 x 9.3 mm (3.08 x 1.8 x 0.36 in.) |
Compatibility
The A300 is used when connecting the pulse-per-second (PPS) output of a GPS16X-HVS or GPS16X-HVS-PW to a CR800-series, CR1000, or CR3000 datalogger. It is not needed with a CR6 or CR300 datalogger.