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Low/High Level Reference Register (10 & 12)

Two 12 bit Digital to Analog Converters (DAC)

are used to create the low and high level references to the output logic. These registers are write

only. See Figure 10 for details.

10 Low Level Reference Registers

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Write

Not Used Reference Voltage

Ref. Voltage 

2 Ohm Output Imp: 000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV

50 Ohm Output Imp: 000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV

12 High Level Reference Registers

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Write

Not Used Reference Voltage

Ref. Voltage 

2 Ohm Output Imp: 000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV

50 Ohm Output Imp: 000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV

NOTE: The Low Level Reference should not be programmed more positive than the High Level

Reference. Likewise, the High Level Reference should not be programmed less

negative than the Low Level Reference.

Figure 10. Low/High Level Reference Registers

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 35 36

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