MX581 Maxim Integrated Products, Inc., MX581 Datasheet - Page 5

• Manufacturer Part Number: MX581
• Description: Mx581 High-precision, 10v Reference
• Manufacturer: Maxim Integrated Products, Inc.

The temperature characteristic of the MX581 consis-
tently follows an “S-curve” (see Typical Operating
Characteristics). A five-point 100% test guarantees
compliance with -55°C to +125°C specifications and
a three-point 100% test guarantees 0°C to +70°C
specifications.
The voltage change specifications in the Electrical
Characteristics table state the maximum deviation over
temperature from the reference’s initial value at +25°C,
as well as drift in ppm/°C. By adding the maximum
deviation for a given device to its initial tolerance, the
total error is quickly determined.
The MX581 is unique in that it can sink as well as
source current. The circuit is also protected for output
shorts to either +VS or GND. The output voltage versus
current characteristic is shown in the Typical Operating
Characteristics. For applications that require the MX581
to sink current, maintain a load capacitance of 10nF or
greater for proper operation.
The turn-on characteristic and settling performance of
the MX581 are shown in the Typical Operating
Characteristics. Both coarse and fine transient
response is shown. The reference typically settles to
1mV within 180µs after power is applied.
High-Precision, 10V Reference
Figure 2. Optional Fine Trim Configuration
4
_______________________________________________________________________________________
+15V
+V
Voltage Temperature Coefficient
S
+10.0V
MX581
6.8kΩ
V
OUT
GND
Dynamic Performance
3.9Ω
22Ω
12Ω
R
10kΩ
R
RANGE
±30mV
±10mV
TRIM
±5mV
Output Current
4.3kΩ
3.5ppm/°C
2.0ppm/°C
0.6ppm/°C
∆TCR
MAX.
-15V
A pnp power transistor, or Darlington, is easily connect-
ed to the MX581 to greatly increase its output current.
The circuit of Figure 3 provides a +10V output at up to
4A. If the load has a significant capacitive component,
compensation capacitor, C1, should be added. If the
load is purely resistive, high-frequency supply rejection
is improved without C1.
Although line regulation is specified from 12.5V to 40V,
the MX581 can operate with a +12V ±5% input by
adding a resistor as shown in Figure 4. The resistor
reduces the current that must be supplied from V
Note that the resistor cannot be used at higher input
voltages since, as the supply increases, it sources
more current than V
Figure 3. High-Current Precision Supply
Figure 4. 12V Supply Connection
V
IN
≥ 15V
470Ω
Precision High-Current Reference
MX581
MX581
Applications Information
+V
GND
+V
GND
S
S
OUT
V
V
OUT
OUT
can sink.
0.1µF
C1
580Ω 5%
12.5V ±5%
10V AT 0mA TO 5mA
Low Input Voltage
2N6040
V
10V AT 4A
OUT
OUT
.