MAX5133AEEE+ Maxim Integrated Products, MAX5133AEEE+ Datasheet - Page 11

• Manufacturer Part Number: MAX5133AEEE+
• Description: IC DAC 13BIT 3V LP SER 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5133AEEE+

• Settling Time: 20µs
• Number Of Bits: 13
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -

operation of the DAC. Larger capacitor values may be
used but will result in increased start-up delay. The
time constant
the REFADJ input impedance of 4kΩ and C
An external reference may be applied to the REF pin.
Disable the internal reference by pulling REFADJ to
V
DC-based) to be fed into the REF pin. For proper oper-
ation, do not exceed the input voltage range limits of
0V to (V
Determine the output voltage using the following equa-
tion (REFADJ = V
where NB is the numeric value of the MAX5132/
MAX5133 input code (0 to 8191), V
reference voltage, and G is the gain of the output
amplifier, set by an external resistor-divider. The REF
pin has a minimum input resistance of 40kΩ and is
code dependent.
The MAX5132/MAX5133’s DAC output is internally
buffered by a precision amplifier with a typical slew rate
of 0.6V/µs. Access to the output amplifier’s inverting
input (FB) provides the user greater flexibility with
amplifier gain setting and signal conditioning (see
Applications Information ).
The output amplifier typically settles to ±0.5LSB from a
full-scale transition within 20µs when it is connected in
Figure 3a. MAX5132 Reference Adjust Circuit
DD
. This allows an external reference signal (AC- or
100k
90k
DD
+5V
- 1.4V) for V
V
+5V/+3V, 13-Bit, Serial, Force/Sense DACs
OUT
for the start-up delay is determined by
DD
400k
______________________________________________________________________________________
33nF
= 4kΩ · C
):
= V
REF
REF
.
(NB / 8192)G
REFADJ
External Reference
REFADJ
with 10ppm/°C Internal Reference
Output Amplifier
MAX5132
REF
is the external
REFADJ
:
unity gain and loaded with 5kΩ
than 1kΩ may result in degraded performance.
The MAX5132/MAX5133 feature software- and hard-
ware-programmable (PD pin) shutdown modes that
reduce the typical supply current to 3µA. To enter soft-
ware shutdown mode, program the control sequence
for the DAC as shown in Table 1.
In shutdown mode, the amplifier output becomes
high impedance and the serial interface remains active.
Data in the input registers is saved, allowing the
MAX5132/MAX5133 to recall the output state prior to
entering shutdown when returning to normal operation.
To exit shutdown mode, load both input and DAC regis-
ters simultaneously or update the DAC register from the
input register. When returning from shutdown to normal
operation, wait 2ms for the reference to settle. When
using an external reference, the DAC requires only
20µs for the output to stabilize.
The power-down lockout (PDL) pin disables shutdown
when low. When in shutdown mode, a high-to-low tran-
sition on PDL will wake up the DAC with its output still
set to the state prior to power-down. PDL can also be
used to wake up the device asynchronously.
Pulling PD high places the MAX5132/MAX5133 in shut-
down. Pulling PD low will not return the MAX5132/
MAX5133 to normal operation. A high-to-low transition
on PDL or appropriate commands (Table 1) via the ser-
ial interface are required to exit power-down.
Figure 3b. MAX5133 Reference Adjust Circuit
100k
15k
+3V
400k
33nF
Power-Down Lockout Input
REFADJ
Power-Down Input (PD)
Power-Down Mode
MAX5133
100pF. Loads less
(PDL)
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