Author Topic: What are the differences between PA6B and PA6C?  (Read 8415 times)

Horsa

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What are the differences between PA6B and PA6C?
« on: December 06, 2011, 12:27:42 PM »
Q: What are the differences between GlobalTop FGPMMOPA6B (PA6B) and GlobalTop FGPMMOPA6C (PA6C)?

There are some common and some different features.

Common features:
  • size: 16.0 x 16.0 x 6x2 mm
  • nominal acquisition sensitivity: -148 dBm
  • nominal tracking sensitivity: -165 dBm
  • typical cold start time: 35 s
  • typical hot start time: 1 s
  • pins: Vcc, GND, Vbackup, 3D-fix, GND, TX, RX

Different features:
feature / modelPA6BPA6Cunitnotes
chipMT3329MT3339-MediaTek
supply voltage3.2
3.3
5.0
3.0
3.3
4.3
Vmin
typ
max
current consumption48
37
25
20
mA@ 3.3V, 1 Hz update rate, acquisition
@ 3.3V, 1 Hz update rate, tracking
back-up current consumption107µA@ 3.0 V, 25 °C
shut-down current consumption15not availableµA25 °C
timing accuracy10010nsPA6B needs custom firmware to reprogram 3D-fix output as 1PPS
RX high2.1
2.8
2.0
Vcc
Vmin
max
RX low0.0
0.9
0.0
0.8
Vmin
max
TX high2.1
2.8
2.4
2.8
Vmin
max
TX low0.0
0.8
0.0
0.4
Vmin
max
pinsenable
Dplus
Dminus
2 x NC
2 x NC
3 x GND
--

Pin-out comparison
pin / modelPA6BPA6Crow
1VccVcc1
2enableNC1
3GNDGND1
4VbackupVbackup1
53D-fix3D-fix1
6Dplus1PPS1
7DminusNC1
8GNDGND1
9TXDTXD1
10RXDRXD1
11NCGND2
12-GND2
13NCGND2

In addition, please read the following post:
"Features peculiar to GlobalTop GPS receivers based on MediaTek MT3339 chip"
 http://forum.trenz-electronic.de/index.php/topic,163.0.html
« Last Edit: December 06, 2011, 04:55:13 PM by Horsa »