8-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference Features: 3 power modes RMS noise Low power: 24 nV rms at 1.17 SPS, gain = 128 (255 µA typical) Mid power: 20 nV rms at 2.34 SPS, gain = 128 (355 µA typical) Full power: 23 nV rms at 9.4 SPS, gain = 128 (930 µA typical) Up to 22 noise free bits in all power modes (gain = 1) Output data rate Full power: 9.38 SPS to 19,200 SPS Mid power: 2.34 SPS to 4800 SPS Low power: 1.17 SPS to 2400 SPS Rail-to-rail analog inputs for gains > 1 Simultaneous 50 Hz/60 Hz rejection at 25 SPS (single cycle settling) Diagnostic functions (which aid safe integrity level (SIL) certification) Crosspoint multiplexed analog inputs 8 differential/15 pseudo differential inputs See data sheet for additional features

Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers Features: Fast and flexible output rate: 1.25 SPS to 31.25 kSPS Channel scan data rate of 6.21 kSPS/channel (161 µs settling) Performance specifications 17.2 noise free bits at 31.25 kSPS 24 noise free bits at 5 SPS INL: ±2 ppm of FSR 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling User configurable input channels 2 fully differential channels or 4 single-ended channels Crosspoint multiplexer On-chip 2.5 V reference (±2 ppm/°C drift) True rail-to-rail analog and reference input buffers Internal or external clock See data sheet for additional features

Single-Supply, Low Power, Precision FET Input Quad Buffer Features: Low power 250 μA maximum supply current per amplifier FET input 2 pA maximum input bias current at 25°C Extremely high input impedance Low noise 13 nV/√Hz voltage noise at 1 kHz 0.4 μV p-p voltage noise (0.1 Hz to 10 Hz) 0.8 fA/√Hz current noise at 1 kHz High dc precision 3 μV/°C maximum offset drift (B grade) 3 MHz bandwidth Unique pinout No leakage from inputs to supply pins Provides guarding capability Rail-to-rail output Single-supply operation Input range extends to ground Wide supply range Single-supply: 3 V to 36 V Dual-supply: ±1.5 V to ±18 V  Available in a compact 10-lead MSOP

10 MHz, G = 1, 10, 100, 1000 iCMOS Programmable Gain Instrumentation Amplifier Features: Small package: 10-lead MSOP Programmable gains: 1, 10, 100, 1000 Digital or pin-programmable gain setting Wide supply: ±5 V to ±15 V Excellent dc performance High CMRR: 100 dB (minimum), G = 100 Low gain drift: 10 ppm/°C (maximum) Low offset drift: 1.2 µV/°C (maximum), G = 1000 See data sheet for additional features

Fast, Voltage-Out, DC to 440 MHz, 95 dB Logarithmic Amplifier Features: Multistage demodulating logarithmic amplifier Voltage output, rise time <15 ns High current capacity: 25 mA into grounded RL 95 dB dynamic range: –91 dBV to +4 dBV Single supply of 2.7 V min at 8 mA typ DC to 440 MHz operation, ±0.4 dB linearity Slope of +24 mV/dB, intercept of –108 dBV Highly stable scaling over temperature Fully differential dc-coupled signal path 100 ns power-up time, 1 mA sleep current

0.1 GHz TO 2.5 GHz, 70 dB Logarithmic Detector / Controller Features: Wide bandwidth: 0.1 GHz to 2.5 GHz min High dynamic range: 70 dB to ±3.0 dB High accuracy: ±1.0 dB over 65 dB range (@ 1.9 GHz) Fast response: 40 ns full-scale typical Controller mode with error output Scaling stable over supply and temperature Wide supply range: 2.7 V to 5.5 V Low power: 40 mW at 3 V Power-down feature: 60 mW at 3 V

RF Vector Modulator 1.5 GHz TO 2.4 GHz Features: Cartesian amplitude and phase modulation 1.5 GHz to 2.4 GHz frequency range Continuous magnitude control of −4.5 dB to −34.5 dB Continuous phase control of 0° to 360° Output third-order intercept 17.5 dBm Output 1 dB compression point 8.5 dBm Output noise floor −150.5 dBm/Hz at full gain Adjustable modulation bandwidth up to 230 MHz Fast output power disable 4.75 V to 5.25 V single-supply voltage 

Bidirectional, Zero Drift, Current Sense Amplifier Features: Typical 0.1 µV/°C offset drift Maximum ±400 µV voltage offset over full temperature range 2.7 V to 5.5 V power supply operating range Electromagnetic interference (EMI) filters included High common-mode input voltage range −2 V to +70 V continuous −3 V to +80 V survival Initial gain = 60 V/V Wide operating temperature range AD8417WB: −40°C to +125°C AD8417WH: −40°C to +150°C Bidirectional operation Available in 8-lead SOIC and 8-lead MSOP Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz Qualified for automotive applications

Bidirectional, Zero Drift, Current Sense Amplifier Features: Typical 0.1 µV/°C offset drift Maximum ±400 µV voltage offset over full temperature range 2.7 V to 5.5 V power supply operating range Electromagnetic interference (EMI) filters included High common-mode input voltage range −2 V to +70 V continuous −3 V to +80 V survival Initial gain = 60 V/V Wide operating temperature range AD8417WB: −40°C to +125°C AD8417WH: −40°C to +150°C Bidirectional operation Available in 8-lead SOIC and 8-lead MSOP Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz Qualified for automotive applications

3 nV /Hz, Low Power Instrumentation Amplifier Features: Low power 2.3 mA maximum supply current Low noise 3.2 nV/√Hz maximum input voltage noise at 1 kHz 200 fA/√Hz current noise at 1 kHz Excellent ac specifications  10 MHz bandwidth (G = 1) 2 MHz bandwidth (G = 100) 0.6 µs settling time to 0.001% (G = 10) 80 dB CMRR to 20 kHz (G = 1) 35 V/µs slew rate High precision dc performance (AD8421BRZ) 94 dB CMRR minimum (G = 1) 0.2 μV/C maximum input offset voltage drift 1 ppm/C maximum gain drift (G = 1)500 pA maximum input bias current Inputs protected to 40 V from opposite supply ±2.5 V to 18 V dual supply (5 V to 36 V single supply) Gain set with a single resistor (G = 1 to 10,000) Available in 8-lead LFCSP, 8-lead MSOP, and 8-lead SOIC Download AD8421-KGD Data Sheet Available As Known Good Die and fully guaranteed to data sheet specificationsAD8421-EP supports defense and aerospace applications (AQEC standard) Download AD8421-EP data sheet (pdf) Military temperature range (−55°C to +125°C) Controlled manufacturing baseline One assembly/test site One fabrication site Enhanced product change notification Qualification data available on request V62/13625 DSCC Drawing Number