LTC2642AIDD-16#PBF Linear Technology, LTC2642AIDD-16#PBF Datasheet - Page 14

• Manufacturer Part Number: LTC2642AIDD-16#PBF
• Description: IC DAC 16BIT VOUT 10-DFN
• Manufacturer: Linear Technology

Specifications of LTC2642AIDD-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: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC2641/LTC2642
Bipolar Confi guration
Figure 3 shows a typical bipolar DAC application for the
LTC2642. The on-chip bipolar offset/gain resistors, R
and R
a bipolar output swing from –V
Table 2a. 16-Bit Bipolar Offset Binary
Code Table (LTC2642-16)
MSB
1111 1111 1111 1111 V
1000 0000 0000 0001 V
1000 0000 0000 0000 0V
0111 1111 1111 1111 –V
0000 0000 0000 0000 –V
APPLICATIONS INFORMATION
14
BINARY NUMBER
DIGITAL INPUT
IN DAC LATCH
INV
, are connected to an external amplifi er to produce
LSB
REF
REF
ANALOG OUTPUT
REF
REF
(32,767/32,768)
(1/32,768)
(1/32,768)
2
3
4
5
(V
CS
SCLK
DIN
CLR
OUT
LTC2642-16
)
Figure 3. 16-Bit Bipolar Output (LTC2642-16) V
REF
5V/3V
V
DD
9
to V
REF
0.1μF
16-BIT DAC
V
Table 2b. 14-Bit Bipolar Offset Binary
Code Table (LTC2642-14)
MSB
1111 1111 1111 11xx V
1000 0000 0000 01xx V
1000 0000 0000 00xx 0V
0111 1111 1111 11xx –V
0000 0000 0000 00xx –V
2.5V
at the R
REF
BINARY NUMBER
1
REF
DIGITAL INPUT
IN DAC LATCH
0.1μF
FB
pin.
GND
FB
V
R
INV
OUT
LSB
10
FB
4.7μF
8
7
6
26412 F02
The amplifi er circuit provides a gain of +2 from the V
pin, and gain of –1 from V
the bipolar offset binary code tables for 16-bit, 14-bit and
12-bit operation.
ANALOG OUTPUT
REF
REF
REF
REF
C1
10pF
OUT
(8,191/8,192)
(1/8,192)
(1/8,192)
(V
LT1019CS8-2.5
OUT
–
+
1/2 LT1678
GND
)
OUT
–5V
5V
= –V
IN
0.1μF
0.1μF
REF
5V
to V
Table 2c. 12-Bit Bipolar Offset Binary
Code Table (LTC2642-12)
MSB
1111 1111 1111 xxxx V
1000 0000 0001 xxxx V
1000 0000 0000 xxxx 0V
0111 1111 1111 xxxx –V
0000 0000 0000 xxxx –V
BIPOLAR V
–2.5V TO 2.5V
REF
BINARY NUMBER
DIGITAL INPUT
IN DAC LATCH
REF
. Tables 2a, 2b and 2c show
OUT
LSB
ANALOG OUTPUT
REF
REF
REF
REF
(2,047/2,048)
(1/2,048)
(1/2048)
(V
OUT
)
26412fb
OUT