AD9714 Datasheet, PDF (35/48 Pages) Analog Devices – Dual, 8-/10-/12-/14-Bit Low Power Digital-to-Analog Converters

AD9714/AD9715/AD9716/AD9717
Register
IRCML
Q DAC Gain
QRSET
QRCML
AUXDAC Q
AUX CTLQ
AUXDAC I
AUX CTLI
Reference
Resistor
Address Bit Name
0x05
7 IRCMLEN
5:0 IRCML[5:0]
0x06
0x07
5:0 Q DACGAIN[5:0]
7 QRSETEN
5:0 QRSET[5:0]
0x08
7 QRCMLEN
5:0 QRCML[5:0]
0x09
7:0 QAUXDAC[7:0]
0x0A
7 QAUXEN
6:5 QAUXRNG[1:0]
4:2 QAUXOFS[2:0]
0x0B
1:0 QAUXDAC[9:8]
7:0 IAUXDAC[7:0]
0x0C
7 IAUXEN
6:5 IAUXRNG[1:0]
4:2 IAUXOFS[2:0]
0x0D
1:0 IAUXDAC[9:8]
5:0 RREF[5:0]
Function
1: Enables on-chip RCML adjustment
Changes the value of the on-chip RCML resistor; this adjusts the common-mode level of
the DAC output stage
000000: RSET = 250 Ω
100000: RSET = 625 Ω
111111: RSET = 1 kΩ
DAC Q fine gain adjustment; alters the full-scale current as shown in Figure 86
1: Enables on-chip RCML adjustment
Changes the value of the on-chip RSET resistor; this scales the full-scale current of the
DAC in ~0.25 dB steps (nonlinear), see Figure 85
000000: RSET = 8 kΩ
100000: RSET = 16 kΩ
111111: RSET = 32 kΩ
1: Enables on-chip RCML adjustment
Changes the value of the on-chip RCML resistor; this adjusts the common-mode level of
the DAC output stage
000000, RSET = 250 Ω
100000, RSET = 625 Ω
111111, RSET = 1 kΩ
AUXDAC Q output voltage adjustment word LSBs
0x3FF: Sets AUXDAC Q output to full scale
0x200: Sets AUXDAC Q output to midscale
0x000: Sets AUXDAC Q output to bottom of scale
1: enables AUXDAC Q
00: Sets AUXDAC Q output voltage range to 2 V
01: Sets AUXDAC Q output voltage range to 1.5 V
10: Sets AUXDAC Q output voltage range to 1.0 V
11: Sets AUXDAC Q output voltage range to 0.5 V
000: Sets AUXDAC Q top of range to 1.0 V
001: Sets AUXDAC Q top of range to 1.5 V
010: Sets AUXDAC Q top of range to 2.0 V
011: Sets AUXDAC Q top of range to 2.5 V
100: Sets AUXDAC Q top of range to 2.9 V
AUXDAC Q output voltage adjustment word MSBs
AUXDAC I output voltage adjustment word LSBs
0x3FF: Sets AUXDAC I output to full scale
0x200: Sets AUXDAC I output to midscale
0x000: Sets AUXDAC I output to bottom of scale
1: enables AUXDAC I
00: Sets AUXDAC I output voltage range to 2 V
01: Sets AUXDAC I output voltage range to 1.5 V
10: Sets AUXDAC I output voltage range to 1.0 V
11: Sets AUXDAC I output voltage range to 0.5 V
000: Sets AUXDAC I top of range to 1.0 V
001: Sets AUXDAC I top of range to 1.5 V
010: Sets AUXDAC I top of range to 2.0 V
011: Sets AUXDAC I top of range to 2.5 V
100: Sets AUXDAC I top of range to 2.9 V
AUXDAC I output voltage adjustment word MSBs
Permits an adjustment of the on-chip reference voltage and output at REFIO (see Figure 84)
000000: Sets the value of RREF to 8 kΩ, VREF = 0.8 V
100000: Sets the value of RREF to 10 kΩ, VREF = 1.0 V
111111: Sets the value of RREF to 12 kΩ, VREF = 1.2 V
Rev. 0 | Page 35 of 48