MAX5152 Maxim, MAX5152 Datasheet - Page 14

• Manufacturer Part Number: MAX5152
• Description: Low-Power / Dual / 13-Bit Voltage-Output DACs with Configurable Outputs
• Manufacturer: Maxim

In applications where the reference has an AC signal
component, the MAX5152/MAX5153 have multiplying
capabilities within the reference input voltage range
specifications. Figure 12 shows a technique for apply-
ing a sinusoidal input to the reference input to REF_,
where the AC signal is offset before being applied to
the reference input.
Low-Power, Dual, 13-Bit Voltage-Output DACs
with Configurable Outputs
Figure 10. Configurable Output Gain
Table 3. Bipolar Code Table
14
1 1 1 1 1
1 0 0 0 0
1 0 0 0 0
0 1 1 1 1
0 0 0 0 0
0 0 0 0 0
MSB
______________________________________________________________________________________
V
OUT
DAC CONTENTS
REF_
=
(
1 + R1
DAC
1 1 1 1
0 0 0 0
0 0 0 0
1 1 1 1
0 0 0 0
0 0 0 0
MAX5152
MAX5153
R2
) (
DGND
8192
N
)(
LSB
1 1 1 1
0 0 0 1
0 0 0 0
1 1 1 1
0 0 0 1
0 0 0 0
V
REF_
+5V/+3V
V
)
DD
Using an AC Reference
AGND
-V
ANALOG OUTPUT
+V
REF
+V
-V
-V
REF
REF
REF
REF
FB_
OUT_
4096
4096
0V
4096
4095
4096
4095
4096
4096
R2
R1
1
1
- V
V
OUT
REF
The total harmonic distortion plus noise (THD+N) is typ-
ically less than -80dB at full scale with a 1Vp-p input
swing at 5kHz. The typical -3dB frequency is 600kHz
for both devices, as shown in the Typical Operating
Characteristics .
Figure 11. Bipolar Output Circuit
Figure 12. AC Reference Input Circuit
REFERENCE
500mVp-p
+5V/
+3V
REF_
INPUT
AC
DAC _
MAX5152
MAX5153
26k
DGND
10k
+5V/+3V
V
Harmonic Distortion and Noise
DD
+5V/+3V
AGND
DGND
DAC_
REF_
FB_
OUT_
MAX495
10k
MAX5152
MAX5153
V
DD
AGND
V+
V-
10k
FB_
OUT_
V
OUT