MAX5661EVCMAXQU+ Maxim Integrated Products, MAX5661EVCMAXQU+ Datasheet - Page 21

• Manufacturer Part Number: MAX5661EVCMAXQU+
• Description: EVALUATION SYSTEM FOR MAX56611
• Manufacturer: Maxim Integrated Products

Specifications of MAX5661EVCMAXQU+

• Number Of Dac's: 1
• Number Of Bits: 16
• Outputs And Type: 2, Single Ended
• Data Interface: Serial
• Dac Type: Current/Voltage
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 105°C
• Utilized Ic / Part: MAX5661
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX5661 communicates between its internal regis-
ters and the external bus lines through the 4-wire
SPI-/QSPI-/MICROWIRE-compatible serial interface.
Table 1 details the command bits (C7–C0) and the data
bits (D15–D0) of the serial input word. Tables 2 and 3
detail the command byte and the subsequent register
accessed. Tables 4–8 detail the various read/write
internal registers and their power-on reset states. When
updating the DAC register, allow 5µs before sending
the next command.
Write to the control register to enable the current or volt-
age output, set the voltage output for unipolar or bipolar
Table 1. Input Command Bits
Table 2. Register Description
X = Don’t care. All other commands are reserved for factory use. Do not use.
MSB
C7 C6 C5 C4 C3 C2 C1 C0 D15
C7
X
X
X
X
X
X
X
X
X
X
X
Outputs for Industrial Analog Output Modules
COMMAND BYTE
C6
X
X
X
X
X
X
X
X
X
X
X
Single 16-Bit DAC with Current and Voltage
C5
______________________________________________________________________________________
X
X
X
X
X
X
X
X
X
X
X
COMMAND BITS
Control Register (Read/Write)
C4
X
X
X
X
X
X
X
X
X
X
X
Register Descriptions
C3
0
0
0
0
0
0
0
0
1
1
1
C2
D14
0
0
0
0
1
1
1
1
0
0
1
24-BIT SERIAL INPUT WORD
D13
C1
0
0
1
1
0
0
1
1
0
0
1
D12
C0
0
1
0
1
0
1
0
1
0
1
1
D11
mode, and set the current-output range. The control
register also initializes the clear and fault modes. Set
the command byte to 0x01 to write to the control regis-
ter. Set the command byte to 0x02 to read from the
control register. Write or read data bits D15–D5. D4–D0
are don’t-care bits for a write operation. D4, D3, and D2
are read-only bits. D1 and D0 are don’t-care bits for a
read operation (see Table 4).
Set the OUTVON bit (D15) to 1 to enable the OUTV
DAC voltage output. Set the OUTION bit (D14) to 1 to
enable the OUTI DAC current output. Always set bit
D13 to 0. Set the B/U bit (D12) to determine whether the
OUTV output operates in bipolar mode (B/U = 0) or
unipolar mode (B/U = 1).
No operation. Transfer shift register’s data to DOUT.
Write control register.
Read control register.
Load input register. DAC register unchanged.
Load DAC and input register.
Load DAC register. Transfer input register data to DAC
register. DAC outputs update on CS’s rising edge.
Write clear register.
Read input register.
Read DAC register.
Read clear register.
No operation. Transfer shift register’s data to DOUT.
D10
D9
DATA BITS
D8
D7
OPERATION
D6
D5
D4
D3
D2
D1
LSB
D0
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