MAX5490 19-3337 Rev 2 3/05 100k Precision-Matched Resistor-Divider in SOT23 General Description Features The MAX5490 precision resistor-divider consists of two Resistance Ratios from 1:1 to 100:1 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 Tight Initial Ratio Accuracy grade), and 0.1% (C grade). The MAX5490 provides an 0.035% (MAX5490A) extremely low resistance-ratio temperature drift of 0.05% (MAX5490B) 1ppm/C (typ) over -55C to +125C, and has an end-to- 0.1% (MAX5490C) end resistance of 100k . Resistance ratios from 1:1 to Low 1ppm/C (typ) Resistor-Ratio-Drift 100:1 are available. Five standard ratios are available (see Table 1), and custom ratios are also available upon Up to 80V Operating Voltage Across Sum of R1 request. The MAX5490 is ideal for precision gain-setting and R2 applications where tight resistance matching and low temperature drift are necessary. Tiny 3-Pin SOT23 Package The MAX5490 is available in a space-saving 3-pin SOT23 package, and is guaranteed over the military -55C to +125C temperature range. Applications Ordering Information* Industrial Process Control R A T IO Instrumentation T EMP PIN - PAR T A C C U R A C Y R A N G E PAC K A G E Precision Gain Setting ( % ) Medical Equipment 0.035 M AX5 490 A - T-55 C to + 125C 3 SO T23-3 Automatic Test Equipment 0.05 M AX5 490 B - T-55 C to + 125C 3 SO T23-3 0.1 Base Stations M AX5 490 C - T-55 C to + 125C 3 SO T23-3 *See the How to Order section for more details. Block Diagram Pin Configuration TOP VIEW P1 MAX5490 P1 1 R 1 3 P3 MAX5490 P3 P2 2 R 2 SOT23 P2 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.100k Precision-Matched Resistor-Divider in SOT23 ABSOLUTE MAXIMUM RATINGS Voltage Between P1 and P2.................................................100V Operating Temperature Range .........................-55C to +125C Maximum Current into Any Pin ......................................1.00mA 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 3-Pin SOT23 ( ) .....................................................141C/W J-A 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 = -55C to +125C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX5490 A, T = +25C 0.035 A Initial Resistor Ratio Error (Note 2) % MAX5490 B, T = +25C 0.05 A MAX5490 C, T = +25C 0.1 A 1:1 ratio 10:1 1 2 Resistance-Ratio Temperature ppm/C Coefficient (Note 3) 10:1 ratio 25:1 2 4 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)T = +25C 95 100 105 k 1 2 A Continuous Working Voltage V -80 +80 V P1-P2 Between P1 and P2 Continuous Current I , I 840 A R1 R2 P1, P2, P3 Capacitance 2pF Maximum Power Rating 67.2 mW Resistance Ratio Long-Term 2000 hours at +70C 0.03 % Stability -3dB Bandwidth f 1:1 ratio (Note 6) 3 MHz 3dB Thermal Noise 45 V RMS In accordance with MIL-STD-2020 Current Noise -25 dB method 30B Note 1: The MAX5490 is 100% production tested at T = +25C. Specifications over -55C to +125C are guaranteed by design A and characterization. Note 2: Testing conditions: T = +25C, V = 10V and 80V. A P1-P2 R 1 R Note 3: Resistance-ratio temperature coefficient is defined as and is guaranteed by design, not production tested. 2 R 1 T For ratios from 25:1 to 100:1, contact factory. R 2 RR + () and is tested at 10V and 80V. Note 4: Absolute TCR is defined as 12 RR + T () 12 2 MAX5490