MAX5705AAUB+ Maxim Integrated, MAX5705AAUB+ Datasheet - Page 20

• Manufacturer Part Number: MAX5705AAUB+
• Description: Digital to Analog Converters - DAC 12Bit 1Ch V Buffered Precision DAC
• Manufacturer: Maxim Integrated

Specifications of MAX5705AAUB+

• Rohs: yes
• Number Of Converters: 1
• Number Of Dac Outputs: 1
• Resolution: 12 bit
• Interface Type: Serial SPI
• Settling Time: 6 us
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: uMAX-10
• Maximum Power Dissipation: 707.3 mW
• Minimum Operating Temperature: - 40 C
• Output Type: Voltage Buffered
• Supply Current: 155 uA
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.7 V

The REF (B[23:20] = 0010) command updates the global
reference setting used for the DAC. Set B[17:16] = 00 to
use an external reference for the DAC or set B[17:16] to
01, 10, or 11 to select either the 2.5V, 2.048V, or 4.096V
internal reference, respectively.
If RF3 (B19) is set to zero (default) in the REF command,
the REF I/O will not be driven by the internal reference
circuit, saving current. If RF3 is set to one, the REF I/O
will be driven by the internal reference circuit, consuming
an additional 25FA (typ) of current when the reference is
powered; when the reference is powered down, the REF
I/O will be high-impedance.
If RF2 (B18) is set to zero (default) in the REF command,
the reference will be powered down any time the DAC
is powered down (in STANDBY mode). If RF2 (B18) is
set to one, the reference will remain powered even if the
DAC is powered down, allowing continued operation of
external circuitry. In this mode, the 1FA shutdown state is
not available. See
Table 3. REF (0010) Command Format
Table 4. SOFTWARE (0011) Command Format
Maxim Integrated
B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10
B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B9
Ultra-Small, Single-Channel, 8-/10-/12-Bit Buffered Output
DEFAULT VALUES
DEFAULT VALUES
Voltage DACs with Internal Reference and SPI Interface
0
REF COMMAND
0
COMMANDS
SOFTWARE
0
0
1
COMMAND BYTE
1
COMMAND BYTE
0
1
Table
RF3 RF2 RF1 RF0
0
X
X
3.
SW2 SW1 SW0 X
0
0
001: GATE
000: END
Other: No
100: CLR
101: RST
Mode:
Effect
Ref Mode:
01 = 2.5V
10 = 2.0V
11 = 4.0V
00 = EXT
0
0
0
0
REF Command
X
X
X
X
X
X
X
X
MAX5703/MAX5704/MAX5705
DATA HIGH BYTE
X
X
X
DATA HIGH BYTE
Don’t Care
Don’t Care
X
X
X
X
X
X
X
X
The SOFTWARE (B[23:20] = 0011) commands provide
a means of issuing several flexible software actions. See
Table
The SOFTWARE Command Action Mode is selected by
B[18:16]:
END (000):
GATE (001):
CLEAR (100):
RESET (101):
OTHER:
X
X
X
X
4.
B9
X
X
X
X
B8
B8
X
X
X
X
Used to end any active gate operation,
returning to normal operation (default).
DAC contents will be gated to their
DEFAULT selected values until the gate
condition is removed.
All CODE and DAC contents will be
cleared to their DEFAULT selected
values.
All
configuration registers reset to their
power-up defaults (including REF,
POWER,
simulating a power cycle reset.
No effect.
B7
B7
X
X
X
X
CODE,
B6
B6
X
X
X
X
SOFTWARE Commands
B5
B5
and
X
X
X
X
DATA LOW BYTE
DATA LOW BYTE
Don’t Care
DAC,
Don’t Care
B4
B4
X
X
X
X
CONFIG
B3
B3
X
X
X
X
RETURN,
B2
B2
X
X
X
X
settings),
B1
B1
X
X
X
X
and
B0
B0
X
X
X
X
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