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19-1115; Rev 2; 11/04
Pin-Programmable, Precision Voltage
Reference
General Description
Maxim’s MX584 is a temperature-compensated,
bandgap voltage reference which provides pin-program-
mable output voltages of +10.00V, +7.50V, +5.00V, and
+2.50V. External components are not required for these
outputs, but if other voltages are desired, they can be
programmed with external resistors.
Laser trimming minimizes output error as well as tem-
perature drift, to as low as 10mV and 15ppm/°C with
the MX584K.
The input voltage range of the MAX584 is 4.5V to 30V.
The reference also includes a STROBE input which
shuts down the reference output. Typical current drain
when ON is 750µA. This drops to about 100µA when
the reference is strobed OFF.
The MX584 is designed for use with 8- to 14-bit A/D
and D/A converters as well as data acquisition systems.
It is available in 8-lead TO-99 metal cans, plastic DIPS,
CERDIPS, and SO packages.
♦
±10mV Tolerance at +10V (MX584K)
♦
Low Tempco: 15ppm/°C, max (MAX584K)
♦
No External Components or Trims
♦
Short-Circuit Proof
♦
Output Sources and Sinks Current
♦
10mA Output Current
Features
♦
+10.0V, +7.5V, +5.0V, +2.5V Programmable
Outputs
MX584
Ordering Information
PART
MX584JH
MX584KH
MX584JN
MX584KN
MX584JCSA
MX584KCSA
MX584JESA
MX584KESA
MX584JC/D
MX584SH
MX584TH
MX584SQ
MX584TQ
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
PIN-PACKAGE ERROR
8 TO-99 Can
8 TO-99 Can
8 PDIP
8 PDIP
8 SO
8 SO
8 SO
8 SO
8 Dice
8 TO-99 Can
8 TO-99 Can
8 CERDIP
8 CERDIP
±30mV
±10mV
±30mV
±10mV
±30mV
±10mV
±30mV
±10mV
±30mV
±30mV
±10mV
±30mV
±10mV
Applications
CMOS DAC Reference
A/D Converter Reference
Measurement Instrumentation
Data Loggers
Precision Analog Systems
Programmable Offset for PGAs
Pin Configuration
TOP VIEW
10.0V 1
5.0V 2
8 +V
S
7 CAP
Typical Operating Circuit
MX584
2.5V 3
COMMON 4
6 V
BG
5 STROBE
8
+V
S
10V
0.01µF
MX584
5V
COMMON
2
1
R
FB
OUT1
MX7533
V
REF
-5V
OUT2
GND
MAX400
V
OUT
0 TO 5V
8-Lead DIP
TAB
8
10.0V 1
7 CAP
4
5.0V 2
2.5V 3
MX584
6 V
BG
5 STROBE
2.4kΩ
4
COMMON
-15V
-5V REFERENCE FOR CMOS DAC
TO-39
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin-Programmable, Precision Voltage
Reference
MX584
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V
IN
to COMMON)...............................-0.3V, +40V
Continuous Power Dissipation
Metal Can (derate 6.7mW/°C above +60°C) ................600mW
CERDIP (derate 8mW/°C above +75°C) .......................600mW
Plastic DIP (derate 6mW/°C above +75°C) ..................450mW
SO (derate 5.3mW/°C above +75°C) ...........................400mW
Output Short-Circuit Duration (Note 1) ..........................Indefinite
Operating Temperature Range
Commercial (J, K) ................................................0°C to +70°C
Military (S, T) ...................................................-55°C to +125°C
Extended (J, K) .................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Die Junction Temperature (T
J
) ..........................-55°C to +150°C
Thermal Resistance, Junction to Ambient
Metal Can..................................................................+150°C/W
CERDIP .....................................................................+125°C/W
Plastic DIP.................................................................+160°C/W
SO .............................................................................+170°C/W
Note 1:
Absolute maximum power dissipation must not be exceeded.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= +15V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
V
OUT
= +10V,
MAX584J/S
MAX584K/T
V
OUT
= +7.5V,
MAX584J/S
MAX584K/T
V
OUT
= +5.0V,
MAX584J/S
MAX584K/T
V
OUT
= +2.5V,
MAX584J/S
MAX584K/T
MX584J/S, all outputs
MX584K, all outputs
Output Voltage Temperature
Coefficient
MX584KE, all outputs
MX584JE, all outputs
MX584T, +10V, +7.5V, +5V out
+2.5V out
Differential Tempco Between
Outputs
Quiescent Supply Current
Quiescent Current Tempco
Turn-On Settling Time
Noise
Long-Term Stability
Short-Circuit Current
Line Regulation
I
SC
No load
(V
OUT
+ 2.5V) < V
IN
< +15V
+15V < V
IN
< +30V
t
ON
e
n(P-P)
To ±1%
0.1Hz to 10Hz
Noncumulative
I
Q
MX584K/T
MX584J/S
I
L
= 0mA
3
5
750
1.5
200
50
25
30
0.005
0.002
1000
MIN
TYP
MAX
±30
±10
±22
±8
±15
±6
±7.5
±3.5
30
15
20
30
15
20
ppm/°C
µA
µA/°C
µs
µV
P-P
ppm/khrs
mA
%/V
ppm/°C
mV
UNITS
Output Voltage Tolerance
I
L
= 0mA, at Pin 1
2
_______________________________________________________________________________________
Pin-Programmable, Precision Voltage
Reference
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +15V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Load Regulation
Source
Output Current
Sink
(Note 2)
I
L
V
IN
>
V
OUT
+
2.5V
SYMBOL
CONDITIONS
I
L
= 0mA to 5mA
T
A
= +25°C
T
MIN
to T
MAX
T
MIN
to T
MAX
MX584J/K
MX584S/T
10
5
5
0.2
5
mA
MIN
TYP
30
MAX
UNITS
ppm/mA
MX584
T
A
= -55°C to +85°C MX584S/T
Note 2:
C
LOAD
≥10nF.
See the
Output Current
section.
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
TYPICAL
TEMPERATURE CHARACTERISTICS
MX584 toc01
SPECTRAL NOISE DENSITY
AND RMS NOISE vs. FREQUENCY
NOISE SPECTRAL DENSITY (mV/√Hz)
NO CAP
0.01µF
100
1000pF
100pF
MX584 toc02
OUTPUT VOLTAGE
vs. SINK AND SOURCE CURRENT
14
OUTPUT VOLTAGE (V)
12
10
8
6
4
2
+V
S
= +15V
T
A
= +25°C
MX584 toc03
10.005
1000
V
OUT
(V)
10.000
10
NO CAP
TOTAL NOISE
µRMS
UP TO
SPECIFIED FREQUENCY
9.995
-55
0
25
TEMPERATURE (°C)
70
125
1
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
0
-20 -15 -10 -5
10 15 20
SINK
SOURCE
OUTPUT CURRENT (mA)
0
5
POWER-ON
SETTLING CHARACTERISTICS
12
OUTPUT (V)
MX584 toc04
10.030
OUTPUT (V)
11
10.020
10.010
10
20
10
0
0
50 100 150 200 250
10.000
POWER-SUPPLY INPUT (V)
SETTLING TIME (µs)
_______________________________________________________________________________________
3
Pin-Programmable, Precision Voltage
Reference
MX584
Detailed Description
As shown in Figure 1, most applications of the MX584
require no external components. Connections to +V
S
and COMMON (COMMON is also tied to the case in the
TO-99 metal package) with all other pins unconnected
result in a buffered +10.00V output at pin 1. The other
pretrimmed voltages are obtained by strapping pins as
shown in Table 1. If one or more external buffer ampli-
fiers are connected to the programming pins (pins 2, 3),
multiple outputs can be obtained from one reference.
Table 1. Programming Pin Connections
OUTPUT VOLTAGE
(V)
10
7.5
5.0
2.5
PROGRAMMING (OUTPUT ON PIN 1)
Pins 2 and 3 are unconnected
Connect pins 2 and 3 together
Connect pins 2 and 1 together
Connect pins 3 and 1 together
Other Output Voltages
The MX584 can be adjusted to a different output volt-
age by adding one or more resistors as in Figure 2. As
the diagram shows, the reference can be thought of as
a 1.215V bandgap followed by a noninverting amplifier.
If R1 and R2 are used alone, the adjustment range is
widest but the resolution of the trim may be too coarse,
even when a multi-turn trip pot is used.
When adding external resistors, output voltages well
above 10V can be obtained. R2 should therefore be
chosen carefully since it sets the maximum output volt-
age. R2’s resistance should not be so low as to jeopar-
dize other circuits if R1 is misadjusted.
The fixed output voltages can also be varied by con-
necting only one resistor, as in the dashed lines in
Figure 2. Connecting R3 alone raises V
OUT
while R4
alone lowers it. These resistors (or potentiometers)
must have very low temperature coefficients if accuracy
over temperature is to be unaffected by the adjustment.
If fine adjustment of the output is all that is required, the
circuit of Figure 3 is recommended. It provides good
stability and resolution for a trim range of ±200mV. If
the 2.5V output is adjusted, R2 should be connected to
V
BG
, pin 6, and the trim range should be limited to
±100mV.
+(V
OUT
+ 2.5V) TO +30V
8
+V
S
10.0V
MX584
5.0V
2.5V
4
1
2
3
V
OUT
,
+2.5V, +5.0V, +7.5V, +10V
Figure 1. Basic Connection for Positive Outputs
V
SUPPLY
8
+V
S
MX584
10V 1
V
OUT
5V 2
+1.215V
8kΩ
2.5V 3
+2.5V*
4kΩ
V
BG
5
R4
Voltage Temperature Coefficient
The temperature characteristic of the MX584 consis-
tently follows an "S-curve" as shown in the
Typical
Operating Characteristics.
A five-point 100% test guar-
antees compliance with -55°C to +125°C specifications
and a three-point 100% test guarantees 0°C to +70°C
specifications.
The tolerance specifications in the
Electrical
Characteristics
table state the maximum deviation from
the reference’s initial value at +25°C. By adding the
maximum deviation for a given device to its initial toler-
ance, the total possible error is determined.
R1
R3
R2
4kΩ
COM 4
*THE 2.5V TAP (PIN 3) IS USED INTERNALLY AS A BIAS POINT AND SHOULD
NOT BE CHANGED BY MORE THAN 100mV IN ANY TRIM CONFIGURATION.
Figure 2. Variable Output Options
4
_______________________________________________________________________________________
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