Mallinckrodt NELLCOR NPB-4000 Service Manual page 198

Section 16: MP-205 Service Manual; 044540A-0296
16-6
Table 16-1: Oxichip Circuit Pin Descriptions
Pin #,
Pin Name
type
VSSA 13, AP
FR3OUT 14, AO
FR3NEG 15, AI
FR2OUT 16, AO
FR2NEG 17, AI
FR1OUT 18, AO
FR1NEG 19, AI
RED 20, AO
PGAOUT 21, AO
SOUT 22, AO
SINNEG 23, AI
SWITCH 24, AO
A2OUT 25, AO
A2INNEG 26, AI
A1INPOS 27, AI
A1INNEG 28, AI
A1OUT 29, AO
VREF 30, AO
3125
31, AO VREF25 2.5 volt buffered reference output.
32, AO VREF22 2.2 volt reference output.
33, AO IR
34, AI FI1NEG
35, AO FI1OUT
36, AI FI2NEG
37, AO FI2OUT
38, AI FI3NEG
39, AO FI3OUT
40, AO LS
41, AP VDDA
42, DP VDD
43, DI RED-IR* Multiplexer select input, high is Red, low is IR, to
44, DI CLK_16
45, DI CLK
46, DI D4
47, DI D3
48, DI D2
Signal Description
Analog power return.
Red filter chain, operational amplifier 3 output.
Red filter chain, operational amplifier 3 inverting input.
Red filter chain, operational amplifier 2 output.
Red filter chain, operational amplifier 2 inverting input.
Red filter chain, operational amplifier 1 output.
Red filter chain, operational amplifier 1 inverting input.
Red demodulator/demultiplexer output.
Programmable gain amplifier output.
Ambient light auto-null amp output.
Ambient light auto-null amplifier inverting input.
Ambient light auto-null switch output.
Photodetector amplifier 2 output.
Photodetector amplifier 2 inverting input.
Photodetector amplifiers 1 and 2 non-inverting inputs.
Photodetector amplifier 1 inverting input.
Photodetector amplifier 1 output.
3.125 volt reference output.
IR demodulator/demultiplexer output.
IR filter chain, operational amplifier 1 inverting input.
IR filter chain, operational amplifier 1 output.
IR filter chain, operational amplifier 2 inverting input.
IR filter chain, operational amplifier 2 output.
IR filter chain, operational amplifier 3 inverting input.
IR filter chain, operational amplifier 3 output.
Level shifted and multiplexed output to ADC.
Analog power.
Digital power.
U4P1-2.
Clock speed select, high is 128xfMOD, low is 8xfMOD
Clock input
Data bit 4, to AD4
Data bit 3, to AD3
Data bit 2, to AD2