MAX5742AUB+ Maxim Integrated Products, MAX5742AUB+ Datasheet - Page 11

IC DAC 12BIT QUAD LP SER 10-UMAX

MAX5742AUB+

Manufacturer Part Number
MAX5742AUB+
Description
IC DAC 12BIT QUAD LP SER 10-UMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5742AUB+

Settling Time
4µs
Number Of Bits
12
Data Interface
Serial
Number Of Converters
4
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°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 (SPI)
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Maximum Operating Temperature
+ 125 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
The typical application circuit (Figure 3) shows the
MAX5742 configured for a unipolar output, where the
output voltages and the reference inputs have the
same polarity. Table 3 lists the unipolar output codes.
The MAX5742 can be configured for bipolar operation
using a dual supply op amp (Figure 4). The transfer
function for bipolar operation is:
Figure 1. 16-Bit Input Word
Figure 2. Timing Diagram
D15 (MSB)
C3
CONTENTS OF SHIFT REGISTER
SCLK
DIN
CS
C2
t
X
X
CSPWH
V
Applications Information
OUT
12-Bit, Low-Power, Quad, Voltage-Output
C1
______________________________________________________________________________________
V
t
t
CSS
OS
REF
1
C0
C3
t
OH
4096
2NB
D11
2
Unipolar Output
C2
Bipolar Output
t
D10
1
CL
t
CH
3
C1
D9
D8
4
DAC with Serial Interface
C0
where NB is the decimal value of the DACs binary input
code. Table 4 shows digital codes (offset binary) and
corresponding output voltages for the circuit in Figure 4.
Careful PC board layout is important for optimal system
performance. To reduce noise injection and digital feed-
through, keep analog and digital signals separate.
Ensure that that the return path from GND to the supply
ground is short and low impedance. Use a ground
plane. Bypass V
close as possible to V
D7
Power Supply and Layout Considerations
5
D11
D6
6
D5
D10
DD
to GND with a 0.1µF capacitor as
DD
D4
.
D1
D3
16
D0
D2
t
CSH
X
D1
D0 (LSB)
X
D0
11

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