LTC1446CS8#PBF Linear Technology, LTC1446CS8#PBF Datasheet - Page 8

• Manufacturer Part Number: LTC1446CS8#PBF
• Description: IC D/A CONV 12BIT R-R DUAL 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1446CS8#PBF

• Settling Time: 14µs
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 5mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Channels: 2
• Resolution: 12b
• Interface Type: Serial (3-Wire)
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Output Type: Voltage
• Integral Nonlinearity Error: 5LSB
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC1446/LTC1446L
OPERATIO
Serial Interface
The data on the D
on the rising edge of the clock. Data is loaded as one 24-
bit word where the first 12 bits are for DAC A and the
second 12 are for DAC B. For each 12-bit segment the MSB
is loaded first. Data from the shift register is loaded into the
DAC register when CS/LD is pulled high. The clock is
disabled internally when CS/LD is high. Note: CLK must be
low before CS/LD is pulled low to avoid an extra internal
clock pulse.
The buffered output of the 24-bit shift register is available
on the D
Multiple LTC1446/LTC1446L’s may be daisy-chained to-
gether by connecting the D
chip, while the clock and CS/LD signals remain common
to all chips in the daisy chain. The serial data is clocked to
all of the chips, then the CS/LD signal is pulled high to
update all of them simultaneously.
8
OUT
pin which swings from GND to V
IN
U
input is loaded into the shift register
OUT
pin to the D
IN
pin of the next
CC
.
Voltage Output
The LTC1446/LTC1446L include an internal voltage refer-
ence which is connected to each DAC. The LTC1446 has a
full scale of 4.095V making 1LSB equal to 1mV. The
LTC1446L has a full scale of 2.5V making 1LSB equal to
0.61mV.
The LTC1446/LTC1446L rail-to-rail buffered outputs can
source or sink 5mA when operating with a 5V supply while
pulling to within 300mV of the positive supply voltage or
ground. The outputs swing to within a few millivolts of
either supply rail when unloaded and have an equivalent
output resistance of 40 when driving a load to the rails.
The buffer amplifiers can drive 1000pF without going into
oscillation. The output noise spectral density is
600nV/ Hz at 1kHz.