MAX5491SC03200

MAX5491 19-3009 Rev 3 12/04 Precision-Matched Resistor-Divider in SOT23 General Description Features The MAX5491 precision resistor-divider consists of two Resistance Ratios from 1:1 to 30:1 accurately matched resistors with access to the ends Custom Ratios Available Upon Request and center of the divider. This device offers excellent resistance matching of 0.035% (A grade), 0.05% (B 2kV Human Body Model ESD Protection grade), and 0.1% (C grade). The MAX5491 includes an Tight Initial Ratio Accuracy extremely low resistance-ratio temperature drift of 2ppm/C over -40C to +85C, and has an end-to-end 0.035% (MAX5491A) resistance of 30k . Resistance ratios from 1:1 to 30:1 are 0.05% (MAX5491B) available. Ten standard ratios are available (see Table 0.1% (MAX5491C) 1), and custom ratios are also available upon request. To Low 2ppm/C Resistor-Ratio-Drift enhance device and system robustness, the MAX5491 also features 2kV Human Body Model electrostatic dis- Up to 50V Operating Voltage Across Sum of R1 charge (ESD) protection to ensure against real-world and R2 ESD events. The MAX5491 is ideal for precision gain-set- Tiny 3-Pin SOT23 Package 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 -40C to +85C temperature range. Ordering Information* Applications Industrial Process Control RATI O T EM P PIN - ACCUR ACY PAR T Instrumentation R A N G E PAC K A G E (%) Precision Gain Setting 0.035 MAX5491 A -T -40C to +85C 3 SOT23-3 Medical Equipment 0.05 MAX5491 B -T -40C to +85C 3 SOT23-3 Automatic Test Equipment 0.1 MAX5491 C -T -40C to +85C 3 SOT23-3 Base Stations *See the How to Order section for more details. Block Diagram Pin Configuration TOP VIEW P1 MAX5491 P1 1 R 1 3 P3 MAX5491 P3 P2 2 R 2 P2 SOT23 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Precision-Matched Resistor-Divider in SOT23 ABSOLUTE MAXIMUM RATINGS Voltage Between P1 and P2...................................................50V Operating Temperature Range ...........................-40C to +85C Continuous Current into Any Pin....................................1.75mA Junction Temperature......................................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 3-Pin SOT23 (derate 7.1mW/C above +70C).........571.4mW Lead Temperature (soldering, 10s) .................................+300C 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. DC ELECTRICAL CHARACTERISTICS (T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX5491 A, T = +25C 0.035 A Initial Resistor Ratio Error (Note 2) % MAX5491 B, T = +25C 0.05 A MAX5491 C, T = +25C 0.1 A 1:1 ratio 3.2:1 2 Resistance-Ratio Temperature 3.2:1 < ratio 10:1 4 ppm/C Coefficient (Note 3) 10:1 < ratio 30:1 5.5 Absolute Temperature Coefficient TCR (Note 4) 35 ppm/C of Resistance Voltage Coefficient of Resistance VCR (Note 5) 0.1 ppm/V End-to-End Resistance (R + R ) 28.5 30 31.5 k 1 2 Continuous Current I , I 1.75 mA R1 R2 Continuous Working Voltage V 050V P1-P2 Between P1 and P2 Power Rating 87.5 mW Pin Capacitance 2pF Resistance Ratio Long-Term 2000hr at +70C 0.03 % Stability Note 1: The MAX5491 is 100% production tested at T = +25C. Specifications over -40C to +85C are guaranteed by design. A Note 2: Testing conditions: T = +25C, V = 9V and 50V. A P1-P2 R 1 Note 3: Resistance-ratio temperature coefficient is defined as R 2 R 1 T R 2 RR + () Note 4: Absolute TCR is defined as 12 and is tested at 9V and 50V. RR + T () 12 R 1 Note 5: Resistance-ratio voltage coefficient is defined as R 2 R 1 V R 2 2 MAX5491