MAX5105 MAXIM [Maxim Integrated Products], MAX5105 Datasheet - Page 8

• Manufacturer Part Number: MAX5105
• Description: Nonvolatile, Quad, 8-Bit DACs
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX5105/MAX5106 quad, 8-bit DACs feature an
internal, nonvolatile EEPROM, which stores the DAC
states for initialization during power-up. These devices
consist of four resistor string DACs, four rail-to-rail
buffers, a 14-bit shift register, oscillator, power-on reset
(POR) circuitry, and five volatile and five nonvolatile
memory registers (Functional Diagram). The shift regis-
ter decodes the control and address bits, routing the
data to the proper memory registers. Data can be writ-
ten to a selected volatile register, immediately updating
Nonvolatile, Quad, 8-Bit DACs
8
MAX5105
_______________________________________________________________________________________
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
PIN
MAX5106
10
11
12
13
14
15
16
—
—
—
—
1
2
3
4
5
6
7
8
9
Detailed Description
RDY/BSY
REFH1
REFH0
REFH3
REFH2
NAME
REFL0
REFL1
REFL2
REFL3
DOUT
MUTE
OUT3
OUT2
OUT1
OUT0
GND
V
CLK
DIN
CS
DD
DAC1 High Reference Input
DAC0 High Reference Input
Positive Supply Voltage
Ready/Busy Open-Drain Output. Indicates the state of the nonvolatile memory.
Connect a 100kΩ pullup resistor from RDY/BSY to V
Serial Clock Input
Chip Select Input
Serial Data Input
Serial Data Output
Mute Input. Drives all DAC outputs to their respective REFL_ voltages.
Ground. Serves as REFL2 and REFL3 for the MAX5106.
DAC0 Low Reference Input
DAC1 Low Reference Input
DAC2 Low Reference Input
DAC3 Low Reference Input
DAC3 Output
DAC2 Output
DAC1 Output
DAC0 Output
DAC3 High Reference Input
DAC2 High Reference Input
the DAC output, or can be written to a selected non-
volatile register for storage.
The five volatile registers retain data as long as the
device is enabled and powered. Once power is
removed or the device is shut down, the volatile regis-
ters are cleared. The nonvolatile registers retain data
even after power is removed. On power-up, the POR
circuitry and internal oscillator control the transfer of
data from the nonvolatile registers to the volatile regis-
ters, which automatically initializes the device upon
startup. Data can be read from the nonvolatile registers
through DOUT.
FUNCTION
DD.
Pin Description