Reference Manual ADuCM356
REGISTER DETAILS: HIGH-SPEED DAC CIRCUITS
analog.com Rev. A | 109 of 312
HIGH-SPEED DAC CONFIGURATION REGISTER
Address: 0x400C2010, Reset: 0x0000001E, Name: HSDACCON
Table 130. Bit Descriptions for HSDACCON
Bits Bit Name Settings Description Reset Access
[31:13] Reserved Reserved. 0x0 R
12 INAMPGNMDE Excitation Amplifier Gain Control. Selects the gain of excitation amplifier. 0x0 R/W
0 Gain = 2.
1 Gain = 0.25. HSDACCON, Bit 0 must also be set to 1 for this option.
[11:9] Reserved Reserved. 0x0 R/W
[8:1] RATE DAC Update Rate. DAC update rate = ACLK/HSDACCON, Bits[8:1]. ACLK can be a high-speed
oscillator at 16 MHz or 32 MHz or a low-power oscillator at 32 kHz.
0xF R/W
0 ATTENEN PGA Stage Gain Attenuation. Enable the PGA attenuator at the output of the DAC. 0x0 R/W
0 DAC attenuator disabled. Gain of 1.
1 DAC attenuator enabled. Gain of 0.2. HSDACCON, Bit 12 must also be set to 1 for this option.
DIRECT WRITE TO DAC OUTPUT CONTROL VALUE REGISTER
Address: 0x400C2048, Reset: 0x00000800, Name: HSDACDAT
Table 131. Bit Descriptions for HSDACDAT
Bits Bit Name Settings Description Reset Access
[31:12] Reserved Reserved. 0x0 R
[11:0] DACDAT DAC Code. Written directly to DAC. Minimum code is 0x000 and maximum code is 0xFFF. Midscale
(0x800) corresponds to an output voltage of 0 V.
0x800 R/W
DAC DC BUFFER CONFIGURATION REGISTER
Address: 0x400C2104, Reset: 0x00000000, Name: DACDCBUFCON
Table 132. Bit Descriptions for DACDCBUFCON
Bits Bit Name Settings Description Reset Access
[31:2] Reserved Reserved. 0x0 R
1 CHANSEL DAC DC Channel Selection. Selects the low-power DAC output channel onto which to couple a high-speed
DAC AC signal.
0x0 R/W
0 LPDAC0 sets DC level. Selects LPDAC0 as excitation amplifier common-mode level.
1 LPDAC1 sets DC level. Selects LPDAC1 as excitation amplifier common-mode level.
0 Reserved Reserved. 0x0 R/W
DAC GAIN REGISTER
Address: 0x400C2260, Reset: 0x00000800, Name: DACGAIN
Protected by CALDATLOCK. Valid for all settings of HSDACCON Bit 12 and HSDACCON Bit 0.
Table 133. Bit Descriptions for DACGAIN
Bits Bit Name Settings Description Reset Access
[31:12] Reserved Reserved. 0x0 R
[11:0] VALUE High-Speed DAC Gain Correction Factor. Unsigned number. 0x800 R/W
0x000 Maximum negative gain adjustment occurs.
0x800 No gain adjustment.
0xFFF Maximum positive gain adjustment occurs.
To Next Page
Loading...
Need help?
General