OA1ZHA, OA2ZHA, OA4ZHA High precision 5 V zero drift, low-power op amps Datasheet - production data Benefits High precision operational amplifiers (op amps) with no need for calibration Accuracy virtually unaffected by temperature change Applications Wearable Fitness and healthcare Medical instrumentation Description The OA1ZHA, OA2ZHA, OA4ZHA series of low- power, high-precision op amps offers very low input offset voltages with virtually zero drift. OA1ZHA, OA2ZHA, OA4ZHA are respectively the single, dual and quad op amp versions, with pinout compatible with industry standards. Features The OA1ZHA, OA2ZHA, OA4ZHA series offers Very high accuracy and stability: offset rail-to-rail input and output, excellent voltage 5 V max at 25 C, 8 V over full speed/power consumption ratio, and 400 kHz temperature range (-40 C to 125 C) gain bandwidth product, while consuming less Rail-to-rail input and output than 40 A at 5 V. All devices also feature an Low supply voltage: 1.8 - 5.5 V ultra-low input bias current. Low power consumption: 40 A max. at 5 V The OA1ZHA, OA2ZHA, OA4ZHA family is the Gain bandwidth product: 400 kHz ideal choice for wearable, fitness and healthcare High tolerance to ESD: 4 kV HBM applications. Extended temperature range: -40 to 125 C Micro-packages: SC70-5, DFN8 2x2, and QFN16 3x3 August 2017 DocID025994 Rev 3 1/35 www.st.com This is information on a product in full production. Contents OA1ZHA, OA2ZHA, OA4ZHA Contents 1 Package pin connections ................................................................ 3 2 Absolute maximum ratings and operating conditions ................. 4 3 Electrical characteristics ................................................................ 5 4 Electrical characteristic curves .................................................... 11 5 Application information ................................................................ 17 5.1 Operation theory ............................................................................. 17 5.1.1 Time domain ..................................................................................... 17 5.1.2 Frequency domain ............................................................................ 18 5.2 Operating voltages .......................................................................... 19 5.3 Input pin voltage ranges .................................................................. 19 5.4 Rail-to-rail input ............................................................................... 19 5.5 Input offset voltage drift over temperature ....................................... 20 5.6 Rail-to-rail output ............................................................................. 20 5.7 Capacitive load ................................................................................ 21 5.8 PCB layout recommendations ......................................................... 21 5.9 Optimized application recommendation .......................................... 22 5.10 EMI rejection ration (EMIRR) .......................................................... 22 5.11 Application examples ...................................................................... 23 5.11.1 Oxygen sensor ................................................................................. 23 5.11.2 Precision instrumentation amplifier .................................................. 24 5.11.3 Low-side current sensing.................................................................. 24 6 Package information ..................................................................... 26 6.1 SC70-5 (or SOT323-5) package information ................................... 27 6.2 MiniSO8 package information ......................................................... 28 6.3 DFN8 2x2 package information ....................................................... 29 6.4 QFN16 3x3 package information ..................................................... 31 7 Ordering information ..................................................................... 33 8 Revision history ............................................................................ 34 2/35 DocID025994 Rev 3