max5236eubt Maxim Integrated Products, Inc., max5236eubt Datasheet - Page 16

• Manufacturer Part Number: max5236eubt
• Description: Single-supply 3v/5v, Voltage-output, Dual, Precision 10-bit Dacs
• Manufacturer: Maxim Integrated Products, Inc.

the midpoint of the two calibrated values. Applications
include tachometers, motion sensing, automatic read-
ers, and liquid clarity analysis.
The two DACs can be used to control the offset and
gain for curve-fitting nonlinear functions, such as trans-
ducer linearization or analog compression/expansion
applications. The input signal is used as the reference
Single-Supply 3V/5V, Voltage-Output, Dual,
Precision 10-Bit DACs
Figure 7. Unipolar Output Circuit (Rail-to-Rail)
Figure 9. External Reference with AC Components
16
REFERENCE
5V/3V
INPUT
500mV
AC
______________________________________________________________________________________
26kΩ
P-P
GAIN = 1.6384V/V
10kΩ
Digital Control of Gain and Offset
REF_
5V/3V
DAC_
MAX5236
MAX5237
MAX495
DAC_
GND
REF_
5V/3V
V
DD
MAX5236
MAX5237
V
121kΩ
77.25kΩ
1kΩ
DD
77.25kΩ
1kΩ
121kΩ
OUT_
GND
OUT_
for the gain-adjust DAC, whose output is summed with
the output from the offset-adjust DAC. The relative
weight of each DAC output is adjusted by R1, R2, R3,
and R4 (Figure 11).
Several MAX5236/MAX5237s may share one common
DIN signal line (Figure 12). In this configuration, the
data bus is common to all devices; data is not shifted
Figure 8. Bipolar Output Circuit
Figure 10. Digital Calibration
µP
REF_
DIN
DAC_
GND
MAX5236
MAX5237
REF_
DAC_
MAX5236
MAX5237
77.25kΩ
5V/3V
Sharing a Common DIN Line
V
DD
GND
5V/3V
121kΩ
V
DD
OUT_
121kΩ
1kΩ
77.25kΩ
1kΩ
10kΩ
0.06384R
R
OUT_
V+
10kΩ
V+
V-
R
PHOTODIODE
PULLDOWN
V+
V-
V
V
OUT
OUT