MAX5491 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Precision-Matched Resistor-Divider in SOT23

19-3009; Rev 3; 12/04
Precision-Matched Resistor-Divider in SOT23
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
Ordering Information*
PA R T
T EM P
RANGE
RA TIO
PIN -
PA C K A G E
AC CUR ACY
(%)
MAX5491_A_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
MAX5491_B_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
MAX5491_C_ _ _ _ _ -T -40°C to +85°C 3 SOT23-3
0.035
0.05
0.1
*See the How to Order section for more details.
Block Diagram
Pin Configuration
P1
MAX5491
R₁
P3
R₂
P2
TOP VIEW
P1 1
P2 2
MAX5491
3 P3
SOT23
________________________________________________________________ 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.