TC1320EUATR Microchip Technology, TC1320EUATR Datasheet - Page 6

• Manufacturer Part Number: TC1320EUATR
• Description: IC,D/A CONVERTER,SINGLE,8-BIT,TSSOP,8PIN
• Manufacturer: Microchip Technology

Specifications of TC1320EUATR

• Rohs Compliant: YES
• Settling Time: 10µs
• Number Of Bits: 8
• Data Interface: I²C
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TC1320
3.0
The TC1320 is a monolithic 8-bit digital-to-analog con-
verter, that is designed to operate from a single supply
that can range from 2.7V to 5.5V. The DAC consists of
a data register (DATA), a configuration register
(CONF), and a current output amplifier. The TC1320
uses an external reference, which also determines the
maximum output voltage.
The TC1320 uses a current steering DAC, based on an
array of matched current sources. This current, along a
precision resistor, converts the contents of the Data
Register and V
by:
3.1
The reference pin, V
input and because of this, the load regulation of the ref-
erence source needs only to be able to tolerate leakage
levels of current (less than 1µA). V
age range from 0 to (V
typically 10pF.
FIGURE 3-1:
DS21386B-page 6
DETAILED DESCRIPTION
Reference Input
Write 1-Byte Format
Read 1-Byte Format
Receive 1-Byte Format
S = START Condition
P = STOP Condition
Shaded = Slave Transmission
S
S
V
REF
Slave Address
OUT
S
Address
7-Bits
Address
into an output voltage, V
7-Bits
= V
REF
Slave Address
DD
SMBus PROTOCOLS
REF
, is a buffered high-impedance
Address
– 1.2V). Input capacitance is
7-Bits
(DATA/256)
R/W
0
R/W ACK
1
ACK
REF
Command Byte: selects
which register you are
reading from.
accepts a volt-
Command
R/W
Data Byte: reads data from
the register commanded by
the last Read Byte or Write
Byte transmission.
8-Bits
0
8-Bits
Data NACK
OUT
given
ACK
ACK
Command Byte: selects
which register you are
writing to.
P
Command
S
8-Bits
Slave Address: repeated
due to change in data
flow direction.
3.2
The TC1320 DAC output is buffered with an internal
unity gain rail-to-rail input/output amplifier, with a typical
slew rate of 0.8V/µsec. Maximum full scale transition
settling time is 10µsec to within ±1/2LSB when loaded
with 1kΩ in parallel with 100pF.
3.3
The TC1320 allows the host to put it into a Low Power
(I
D/A conversion is halted. The SMBus port operates
normally. Standby mode is enabled by setting the
SHDN bit in the CONFIG register. The table below
summarizes this operation.
TABLE 3-1:
3.4
The TC1320 is internally programmed to have a default
SMBus address value of 1001 000b. Seven other
addresses are available by custom order (contact fac-
tory). See Figure 3-1 for locating address bits in SMBus
protocol.
Address
DD
7-Bits
= 0.5µA, typical) Standby mode. In this mode, the
SHDN Bit
Output Amplifier
Standby Mode
SMBus Slave Address
R/W ACK
ACK
0
1
1
STANDBY MODE OPERATION
Data Byte: data goes
into the register set
by the command byte.
Data
8-Bits
Data Byte: reads from
the register set by the
command byte.
©
8-Bits
Data NACK
2002 Microchip Technology Inc.
ACK
Operating Mode
Standby
Normal
P
P