max5532euat Maxim Integrated Products, Inc., max5532euat Datasheet - Page 18

• Manufacturer Part Number: max5532euat
• Description: Dual, Ultra-low-power, 12-bit, Voltage-output Dacs
• Manufacturer: Maxim Integrated Products, Inc.

See Figure 3 for an illustration of how to power the
MAX5532–MAX5535 with either one lithium-ion battery
or two alkaline batteries. The low current consumption
of the devices make the MAX5532–MAX5535 ideal for
battery-powered applications.
Dual, Ultra-Low-Power,
12-Bit, Voltage-Output DACs
Figure 3. Portable Application Using Two Alkaline Cells or One Lithium Coin Cell
Figure 4. Programmable Current Source Driving an LED
18
______________________________________________________________________________________
REFIN
I
N
OF THE DAC INPUT CODE.
LED
DAC
1/2 MAX5534
=
IS THE NUMERIC VALUE
Applications Information
V
REFIN
4096 R
DAC
0.1 F
N
DAC
1-Cell and 2-Cell Circuits
1.8V V
2.2V V
ALKALINE
LITHIUM
REFERENCE)
(1 A, 1.25V
MAX6006
SHUNT
3.3V
3.3V
VOUT
FB
LED
536k
V+
+1.25V
2N3904
R
I
LED
0.01 F
REFIN
1/2 MAX5534
DAC
See the circuit in Figure 4 for an illustration of how to
configure the MAX5534/MAX5535 as a programmable
current source for driving an LED. The MAX5534/
MAX5535 drive a standard NPN transistor to program
the current source. The current source (I
in the equation in Figure 4.
Figure 5. Transimpedance Configuration for a Voltage-Biased
Current-Output Transducer
REFIN
V
GND
DD
1/2 MAX5534
V
BIAS
DAC
Programmable Current Source
TRANSDUCER
FB
VOUT
V
N
OF THE DAC INPUT CODE.
OUT
DAC
=
IS THE NUMERIC VALUE
V
V
REFIN
OUT
I
T
4096
(0.30mV / LSB)
N
VOUT
R
DAC
N
OF THE DAC INPUT CODE.
V
BIAS
DAC
IS THE NUMERIC VALUE
=
V
REFIN
V
LED
OUT
4096
= V
) is defined
N
BIAS
DAC
V
OUT
+ (I
T
R)