OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX5491WC30000+T

P1-P3P4-P6P7-P7
General Description
The MAX5491 precision resistor-divider consists of two
accurately matched resistors with access to the ends
and center of the divider. This device offers excellent
resistance matching of 0.035% (A grade), 0.05% (B
grade), and 0.1% (C grade). The MAX5491 includes an
extremely low resistance-ratio temperature drift of
2ppm/°C over -40°C to +85°C, and has an end-to-end
resistance of 30kΩ. Resistance ratios from 1:1 to 30:1 are
available. Ten standard ratios are available (see Table
1), and custom ratios are also available upon request. To
enhance device and system robustness, the MAX5491
also features ±2kV Human Body Model electrostatic dis-
charge (ESD) protection to ensure against real-world
ESD events. The MAX5491 is ideal for precision gain-set-
ting applications where tight resistance matching and
low temperature drift are necessary.
The MAX5491 is available in a space-saving 3-pin
SOT23 package, and is guaranteed over the extended
-40°C to +85°C temperature range.
Applications
Industrial Process Control
Instrumentation
Precision Gain Setting
Medical Equipment
Automatic Test Equipment
Base Stations
Features
♦ Resistance Ratios from 1:1 to 30:1
♦ Custom Ratios Available Upon Request
♦ ±2kV Human Body Model ESD Protection
♦ Tight Initial Ratio Accuracy
0.035% (MAX5491A)
0.05% (MAX5491B)
0.1% (MAX5491C)
♦ Low 2ppm/°C Resistor-Ratio-Drift
♦ Up to 50V Operating Voltage Across Sum of R1
and R2
♦ Tiny 3-Pin SOT23 Package
MAX5491
Precision-Matched Resistor-Divider in SOT23
________________________________________________________________ Maxim Integrated Products 1
P2
1
3 P3
P1
MAX5491
SOT23
TOP VIEW
2
Pin Configuration
Ordering Information*
P1
P2
P3
MAX5491
R
2
R
1
Block Diagram
19-3009; Rev 3; 12/04
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.
*See the How to Order section for more details.
PA R T
T EM P
R A N G E
PIN -
PA C K A G E
RA TIO
AC CUR ACY
(%)
MAX5491
_A_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
0.035
MAX5491_B_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
0.05
MAX5491_C_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
0.1
MAX5491
Precision-Matched Resistor-Divider in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
Voltage Between P1 and P2...................................................50V
Continuous Current into Any Pin....................................±1.75mA
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 7.1mW/°C above +70°C).........571.4mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX5491_A, T
A
= +25°C ±0.035
MAX5491_B, T
A
= +25°C ±0.05
Initial Resistor Ratio Error (Note 2)
MAX5491_C, T
A
= +25°C ±0.1
%
1:1 ≤ ratio ≤ 3.2:1 2
3.2:1 < ratio ≤ 10:1 4
Resistance-Ratio Temperature
Coefficient (Note 3)
10:1 < ratio ≤ 30:1 5.5
ppm/°C
Absolute Temperature Coefficient
of Resistance
TCR (Note 4) 35 ppm/°C
Voltage Coefficient of Resistance VCR (Note 5) 0.1 ppm/V
End-to-End Resistance (R
1
+ R
2
) 28.5 30 31.5 kΩ
Continuous Current I
R1
, I
R2
±1.75 mA
Continuous Working Voltage
Between P1 and P2
V
P1-P2
050V
Power Rating 87.5 mW
Pin Capacitance 2pF
Resistance Ratio Long-Term
Stability
2000hr at +70°C ±0.03 %
Note 1: The MAX5491 is 100% production tested at T
A
= +25°C. Specifications over -40°C to +85°C are guaranteed by design.
Note 2: Testing conditions: T
A
= +25°C, V
P1-P2
= 9V and 50V.
Note 3: Resistance-ratio temperature coefficient is defined as
Note 4: Absolute TCR is defined as
and is tested at 9V and 50V.
Note 5: Resistance-ratio voltage coefficient is defined as
∆
∆
R
R
R
R
T
1
2
1
2
⎛
⎝
⎜
⎞
⎠
⎟
×
∆
∆
R
R
R
R
V
1
2
1
2
⎛
⎝
⎜
⎞
⎠
⎟
×
∆
∆
RR
RR T
12
12
+
()
+
()
×
MAX5491
Precision-Matched Resistor-Divider in SOT23
_______________________________________________________________________________________ 3
NORMALIZED RESISTOR-RATIO DRIFT
vs. TEMPERATURE
MAX5491 toc01
TEMPERATURE (°C)
RATIO DRIFT (ppm)
7550-25 0 25
-300
-200
-100
0
100
200
300
400
-400
-50 100
V
P1-P2
= 10V
RATIO = 1:1
NORMALIZED RESISTOR-RATIO DRIFT
vs. TEMPERATURE
MAX5491 toc02
TEMPERATURE (°C)
RATIO DRIFT (ppm)
7550-25 0 25
-300
-200
-100
0
100
200
300
400
-400
-50 100
V
P1-P2
= 10V
RATIO = 5:1
Typical Operating Characteristics
(V
P1-P2
= 10V, T
A
= +25°C, unless otherwise noted.)
Pin Description
PIN NAME FUNCTION
1P1R
1
Connection Terminal
2P2R
2
Connection Terminal
3 P3 Midpoint Between R
1
and R
2
Connection Terminals
Detailed Description
As shown in the Block Diagram, the MAX5491 consists
of two precision, low-ratio-drift resistors with an end-to-
end resistance of 30kΩ (R
1
+ R
2
). P3 is the center tap
of the divider. The maximum working voltage of the
MAX5491 is 50V. This device offers a wide range of
resistance ratios (R
1
/R
2
) from 1:1 to 30:1 and is ideally
suited for precision operational amplifier gain/attenua-
tion control. The MAX5491 features a ±2kV ESD protec-
tion that enhances system robustness. A maximum
initial ratio accuracy of 0.035% and a low 2ppm/°C ratio
drift enhance system accuracy.
P1-P3P4-P6P7-P7

MAX5491WC30000+T

Mfr. #:
Buy MAX5491WC30000+T
Manufacturer:
Maxim Integrated
Description:
Resistor Networks & Arrays Precision Match Res/Divide
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet