MAX5104CEE+ Maxim Integrated Products, MAX5104CEE+ Datasheet - Page 12

• Manufacturer Part Number: MAX5104CEE+
• Description: IC DAC 12BIT DUAL SER 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5104CEE+

• Settling Time: 15µs
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Number Of Dac Outputs: 2
• Resolution: 12 bit
• Interface Type: Serial (SPI)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Maximum Power Dissipation: 667 mW
• Minimum Operating Temperature: 0 C
• Supply Current: 0.5 mA
• Voltage Reference: 1.4 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
Figure 14. Digital Control of Gain and Offset
The µP then programs the DAC to set an output voltage
at the midpoint of the two calibrated values. Applications
include tachometers, motion sensing, automatic readers,
and liquid-clarity analysis.
The two DACs can be used to control the offset and gain
for curve-fitting nonlinear functions, such as transducer
linearization or analog compression/expansion applica-
tions. The input signal is used as the reference for the
gain-adjust DAC, whose output is summed with the output
from the offset-adjust DAC. The relative weight of each
DAC output is adjusted by R1, R2, R3, and R4 (Figure 14).
On power-up, the input and DAC registers clear (set to
zero code). For rated performance, V
least 1.4V below V
4.7µF capacitor in parallel with a 0.1µF capacitor to
AGND. Minimize lead lengths to reduce lead inductance.
Digital and AC transient signals on AGND can create
noise at the output. Connect AGND to the highest quality
ground available. Use proper grounding techniques,
such as a multilayer board with a low-inductance ground
plane. Carefully lay out the traces between channels to
reduce AC cross-coupling and crosstalk. Wire-wrapped
boards and sockets are not recommended. If noise
becomes an issue, shielding may be required.
V
V
REF
IN
Grounding and Layout Considerations
SCLK
REFA
REFB
DIN
CS
Digital Control of Gain and Offset
REGISTER
SHIFT
Power-Supply Considerations
MAX5104
DD
. Bypass the power supply with a
INPUT
REG A
INPUT
REG B
REG A
REG B
DAC
DAC
REF_
Printed USA
V
DD
should be at
AGND
DACA
DACB
DGND
TRANSISTOR COUNT: 3053
SUBSTRATE CONNECTED TO AGND
Package information is available on Maxim’s website:
www.maxim-ic.com.
R
R
R
R
TOP VIEW
is a registered trademark of Maxim Integrated Products.
OUTA
OUTB
OSB
OSA
V
OUT
NA IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACA.
NB IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACB.
AGND
OUTA
R3
SCLK
R1
REFA
=
=
OSA
DIN
[ ]
[
CL
CS
(
GAIN
V
IN
1
2
3
4
5
6
7
8
2NA
4096
– OFFSET
R2
Package Information
[
)(
MAX5104
QSOP
R1+R2
R2
Pin Configuration
]
Chip Information
)(
R4
1+
R4
R3
16
15
14
13
12
11
10
9
) (
] [
V
OUTB
OSB
REFB
PDL
UPO
DOUT
DGND
DD
V
V
OUT
REF
4096
2NB
)( )
R4
R3
]