X9530 Datasheet, PDF (10/30 Pages) Xicor Inc. – Temperature Compensated Laser Diode Controller

X9530
Figure 5. D/A Converter Block Diagram
I1DS or I2DS: bits
6 or 7 in Control
register 0.
Vcc
Polarity
Select
Circuit
I1 or I2 Pin
VRef
DAC1 or
DAC2
Input byte
Voltage
Divider
+
-
I1FSO[1:0]
or I2FSO[1:0]
bits 1 and 0, or
3 and 2 in Control
register 5
R1 or R2 Pin
11
00
10 01
R1_External or R2_External
Optional external resistor
Vss
Vss
Vss
Vss
Figure 6. Look-up Table (LUT) Operation
LUT2 Row
Selection bits
D0h
6
A
D
D
8
E
8R
LUT1 Row
Selection bits
90h
6
A
D
D
8
E
8R
LUT2
10Fh
D0h
D2DA[7:0] : Control register 4
8
D1
8
D0 ^Out
Select
DAC 2
Input Byte
D2DAS: Bit 7 of
Control register 5
LUT1
CFh
90h
D1DA[7:0] : Control register 3
8
D1
8
D0 ^Out
Select
DAC 1
Input Byte
D1DAS: Bit 5 of
Control register 5
REV 3.7 8/26/04
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Characteristics subject to change without notice. 10 of 30