max5513 Maxim Integrated Products, Inc., max5513 Datasheet - Page 17

• Manufacturer Part Number: max5513
• Description: Dual, Ultra-low-power, 8-bit, Voltage-output Dacs
• Manufacturer: Maxim Integrated Products, Inc.

See
MAX5512–MAX5515 with either one lithium-ion battery
or two alkaline batteries. The low current consumption
of the devices make the MAX5512–MAX5515 ideal for
battery-powered applications.
Figure
Figure
Figure
REFIN
3. Portable Application Using Two Alkaline Cells or One Lithium Coin Cell
4. Programmable Current Source Driving an LED
N
OF THE DAC INPUT CODE.
I
LED
3 for an illustration of how to power the
DAC
1/2 MAX5514
=
IS THE NUMERIC VALUE
Applications Information
V
REFIN
256 × R
DAC
______________________________________________________________________________________
× N
0.1µF
DAC
1-Cell and 2-Cell Circuits
1.8V ≤ V
2.2V ≤ V
ALKALINE
LITHIUM
REFERENCE)
(1µA, 1.25V
MAX6006
SHUNT
≤ 3.3V
≤ 3.3V
VOUT
FB
LED
V+
2N3904
536kΩ
+1.25V
R
I
LED
8-Bit, Voltage-Output DACs
0.01µF
REFIN
1/2 MAX5514
See the circuit in
configure the MAX5514/MAX5515 as a programmable
current source for driving an LED. The MAX5514/
MAX5515 drive a standard NPN transistor to program
the current source. The current source (I
in the equation in
Dual, Ultra-Low-Power,
Figure
Current-Output Transducer
DAC
REFIN
5. Transimpedance Configuration for a Voltage-Biased
V
GND
DD
1/2 MAX5514
V
BIAS
DAC
Programmable Current Source
TRANSDUCER
Figure
Figure
FB
4.
VOUT
N
OF THE DAC INPUT CODE.
V
4 for an illustration of how to
OUT
DAC
=
IS THE NUMERIC VALUE
I
T
V
V
REFIN
OUT
256
(4.88mV / LSB)
R
VOUT
N
OF THE DAC INPUT CODE.
× N
V
BIAS
DAC
DAC
IS THE NUMERIC VALUE
=
V
REF
V
LED
OUT
256
× N
= V
) is defined
DAC
BIAS
V
OUT
+ (I
T
× R)
17