INA116 Datasheet | Burr-Brown

FEATURES q LOW INPUT BIAS CURRENT: 3f A typ q BUFFERED GUARD DRIVE PINS q LOW OFFSET VOLTAGE: 2m V max q HIGH MON-MODE REJECTION: 84d B (G = 10) q LOW QUIESCENT CURRENT: 1m A q INPUT OVER-VOLTAGE PROTECTION: ±40V DESCRIPTION The INA116 is a plete monolithic FET-input instrumentation amplifier with extremely low input bias current. Difet ® inputs and special guarding techniques yield input bias currents of 3f A at 25°C, and only 25f A at 85°C. Its 3-op amp topology allows gains to be set from 1 to 1000 by connecting a single external resistor. Guard pins adjacent to both input connections can be used to drive circuit board and input cable guards to maintain extremely low input bias current. The INA116 is available in 16-pin plastic DIP and SOL-16 surface-mount packages, specified for the - 40°C to +85°C temperature range. APPLICATIONS q LABORATORY INSTRUMENTATION q p H MEASUREMENT q ION- SPECIFIC PROBES q LEAKAGE CURRENT MEASUREMENT V+ 2 3 4 1 Over-Voltage Protection +1 A1 60kΩ 25kΩ A3 16 Guard + VIN Guard 5 6 7 8 Over-Voltage Protection A2 +1 60kΩ 60kΩ 9 Ref 25kΩ VO 60kΩ G=1+ 50kΩ RG 13 INA116 Guard - VIN Guard Difet®; Burr-Brown Corporation V- International Airport Industrial Park - Mailing Address: PO Box 11400, Tucson, AZ 85734 - Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 - Tel: (520) 746-1111 - Twx: 910-952-1111 Internet: http://.burr-brown./ - FAXLine: (800) 548-6133 (US/Canada Only) - Cable: BBRCORP - Telex: 066-6491 - FAX: (520) 889-1510 - Immediate Product Info: (800) 548-6132 ©1994 Burr-Brown Corporation PDS-1242B Printed in U.S.A. May, 1995 SPECIFICATIONS AT TA = +25°C, VS = ±15V, RL = 10kΩ, unless otherwise noted. INA116P, U PARAMETER INPUT Offset Voltage, RTI Initial vs Temperature vs Power Supply Long-Term Stability Bias Current vs Temperature Offset Current vs Temperature Impedance, Differential mon-Mode mon-Mode Voltage Range Safe Input Voltage mon-Mode Rejection CONDITIONS MIN TYP MAX MIN INA116PA, UA TYP MAX UNITS TA = +25°C...