MAX5842LEUB+ Maxim Integrated Products, MAX5842LEUB+ Datasheet - Page 10

• Manufacturer Part Number: MAX5842LEUB+
• Description: IC DAC 12BIT QUAD 2WIRE 10-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX5842LEUB+

• Settling Time: 4µs
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 4
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Number Of Dac Outputs: 4
• Resolution: 12 bit
• Interface Type: Serial (I2C)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Current: 420 uA
• Voltage Reference: External
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
Figure 2. START and STOP Conditions
Figure 3. Early STOP Conditions
read operations require S
change in direction of data flow.
The acknowledge bit (ACK) is the ninth bit attached to
any 8-bit data word. ACK is always generated by the
receiving device. The MAX5842 generates an ACK
when receiving an address or data by pulling SDA low
during the ninth clock period. When transmitting data,
the MAX5842 waits for the receiving device to generate
an ACK. Monitoring ACK allows for detection of unsuc-
cessful data transfers. An unsuccessful data transfer
occurs if a receiving device is busy or if a system fault
has occurred. In the event of an unsuccessful data
transfer, the bus master should reattempt communica-
tion at a later time.
A bus master initiates communication with a slave
device by issuing a START condition followed by the
7-bit slave address (Figure 4). When idle, the MAX5842
waits for a START condition followed by its slave
10
______________________________________________________________________________________
SCL
SDA
SDA
SDA
SCL
SCL
S
LEGAL STOP CONDITION
ILLEGAL EARLY STOP CONDITION
START
STOP
r
S
ILLEGAL
START
r
conditions because of the
STOP
Acknowledge Bit (ACK)
Slave Address
P
address. The serial interface compares each address
value bit by bit, allowing the interface to power down
immediately if an incorrect address is detected. The
LSB of the address word is the Read/Write (R/W) bit.
R/W indicates whether the master is writing to or read-
ing from the MAX5842 (R/W = 0 selects the write condi-
tion, R/W = 1 selects the read condition). After
receiving the proper address, the MAX5842 issues an
ACK by pulling SDA low for one clock cycle.
The MAX5842 has four different factory/user-pro-
grammed addresses (Table 2). Address bits A6
through A1 are preset, while A0 is controlled by ADD.
Connecting ADD to GND sets A0 = 0. Connecting ADD
to V
MAX5842s to share the same bus.
In write mode (R/W = 0), data that follows the address
byte controls the MAX5842 (Figure 5). Bits C3-C0 con-
figure the MAX5842 (Table 3). Bits D11-D0 are DAC
data. Input and DAC registers update on the falling
edge of SCL during the acknowledge bit. Should the
write cycle be prematurely aborted, data is not updated
and the write cycle must be repeated. Figure 6 shows
two example write data sequences.
The MAX5842 features an extended command mode
that is accessed by setting C3-C0 = 1 and D11-D8 = 0.
The next data byte writes to the shutdown registers
(Figure 7). Setting bits A, B, C, or D to 1 sets that DAC
Table 2. MAX5842 I
Figure 4. Slave Address Byte Definition
Figure 5. Command Byte Definition
MAX5842M
MAX5842M
MAX5842L
MAX5842L
DD
PART
S
sets A0 = 1. This feature allows up to four
C3
A6
C2
A5
C1
V
GND
GND
V
V
ADD
A4
DD
DD
C0
2
C Slave Addresses
A3
Extended Command Mode
D11
A2
DEVICE ADDRESS
D10
Write Data Format
A1
(A6...A0)
0111 100
0111 101
1011 100
1011 101
D9
A0
D8
R/W