Interface Pcb - Thermo Scientific 3403 Manual

Section 8
Appendices

Interface PCB

Figure 7-5. Interface PCB (P/N 192039)
8-20 Midi 40 CO2 Incubator
A/D converter is typically specified by the binary output length desired ('n-
bit' output).
i.e.
4 bit è 0000 to 1111 (0 to 15 decimal)
8 bit è 00000000 to 11111111 (0 to 255 decimal)
12 bit è 000000000000 to 111111111111 (0 to 4095 decimal) etc.
Maximum Count = 2 n - 1
Resolution = (V – V
REF
Resolution ≡ Smallest discernable unit
304864 Assembly: Linear Tech 24 bit 2408 A/D Converter
n = 24
Maximum Count = 16777215
V = 4.5 V
REF
Resolution = 0.0000002682209174765 Volts
≅ 0.000000268 Volts
I/O SUMMARY
J1 – N/A Used only for ULT application
) / (2 n - 1)
GND
2.68 x 10 -7 (¼ μV)
Thermo Scientific