LTC2642CDD-16#PBF Linear Technology, LTC2642CDD-16#PBF Datasheet - Page 13

• Manufacturer Part Number: LTC2642CDD-16#PBF
• Description: IC DAC 16BIT VOUT 10-DFN
• Manufacturer: Linear Technology

Specifications of LTC2642CDD-16#PBF

• Settling Time: 1µs
• Number Of Bits: 16
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 600µW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Number Of Channels: 1
• Resolution: 16b
• Interface Type: SER 3W SPI QSPI UW
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Output Type: Voltage
• Integral Nonlinearity Error: ±2LSB
• Single Supply Voltage (min): 2.7V
• 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: 10
• Package Type: DFN EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. 16-Bit Unipolar Output (LTC2641-16) Unipolar V
APPLICATIONS INFORMATION
Unipolar Confi guration
Figure 2 shows a typical unipolar DAC application for
the LTC2641. Tables 1a, 1b and 1c show the unipolar
binary code tables for 16-bit, 14-bit and 12-bit operation.
2
3
4
5
CS
SCLK
DIN
CLR
LTC2641-16
Table 1b. 14-Bit Unipolar Binary Code Table
(LTC2641-14)
MSB
1111 1111 1111 11xx V
1000 0000 0000 00xx V
0000 0000 0000 01xx V
0000 0000 0000 00xx 0V
5V/3V
V
DD
BINARY NUMBER
DIGITAL INPUT
7
IN DAC LATCH
0.1μF
16-BIT DAC
V
2.5V
REF
1
REF
LSB
0.1μF
REF
REF
REF
(16,383/16,384)
(8,192/16,384) = V
(1/16,384)
GND
ANALOG OUTPUT
V
OUT
8
4.7μF
(V
26412 F02
6
OUT
)
OUT
LT
–
1/2 LTC6078
+
®
1019CS8-2.5
REF
5V/3V
GND
/2
OUT
0.1μF
IN
= 0V to V
5V
UNIPOLAR V
0V TO 2.5V
The external amplifi er provides a unity-gain buffer. The
LTC2642 can also be used in unipolar confi guration by
tying R
clear to midscale.
REF
OUT
Table 1c. 12-Bit Unipolar Binary Code Table
(LTC2641-12)
MSB
1111 1111 1111 xxxx V
1000 0000 0000 xxxx V
0000 0000 0001 xxxx V
0000 0000 0000 xxxx 0V
FB
BINARY NUMBER
DIGITAL INPUT
IN DAC LATCH
and INV to REF . This provides power-up and
Table 1a. 16-Bit Unipolar Binary Code Table
(LTC2641-16)
MSB
1111 1111 1111 1111 V
1000 0000 0000 0000 V
0000 0000 0000 0001 V
0000 0000 0000 0000 0V
BINARY NUMBER
DIGITAL INPUT
IN DAC LATCH
LTC2641/LTC2642
LSB
REF
REF
REF
LSB
(4,095/4,096)
(2,048/4,096) = V
(1/4,096)
ANALOG OUTPUT
REF
REF
REF
(V
(65,535/65,536)
(32,768/65,536) = V
(1/65,536)
OUT
ANALOG OUTPUT
)
(V
OUT
REF
)
/2
13
REF
26412fb
/2