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AD8420ARMZ

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Analog Devices Instrumentation OpAmps, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AD8420ARMZ

Analog Devices · Instrumentation OpAmps · MSOP-8

AD8420ARMZ from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 NC unconnected This pin is not connected internally, and for best CMRR versus frequency and leakage performance it should be connected to the negative supply.
2 +IN input Positive input, which must be kept within the input operating voltage range of −VS − 0.15 V to +VS − 2.2 V at 25°C, with the differential input limited to ±1 V.
3 −IN input Negative input, which must be kept within the same input operating voltage range as +IN, with the differential input limited to ±1 V.
4 −VS power_in Negative supply, used with a single supply of 2.7 V to 36 V or dual supplies of ±2.7 V to ±18 V.
5 +VS power_in Positive supply, used with a single supply of 2.7 V to 36 V or dual supplies of ±2.7 V to ±18 V, and decoupled with a 0.1 µF capacitor placed as close as possible to the pin.
6 REF input Reference input that sets the output level, which must stay within the absolute limits of −VS − 0.5 V to +VS + 0.5 V and within the input operating range.
7 FB input Feedback input used with the external gain resistors, which must stay within the absolute limits of −VS − 0.5 V to +VS + 0.5 V and within the input operating range.
8 VOUT output Rail-to-rail output designed to drive loads of 20 kΩ or greater, with a short-circuit current of 10 mA.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-8
Category Amplifiers
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
CMRR DC to 60 Hz (single supply) 100 dB VCM = 0 V to 2.7 V 3
CMRR at 1 kHz (single supply) 100 dB VCM = 0 V to 2.7 V 3
Offset voltage (VS = 3 V to 5 V) 125 µV VS = 3 V to VS = 5 V 3
Offset voltage (VS = ±5 V) 150 µV VS = ±5 V 3
Average temperature coefficient of offset voltage (single supply) 1 µV/°C TA = −40°C to +85°C 3
Offset RTI vs. supply (PSR) (single supply) 86 dB VS = 2.7 V to 5 V 3
Input bias current (single supply) 20 27 nA TA = +25°C 3
Input bias current (single supply) 24 nA TA = +85°C 3
Input bias current (single supply) 30 nA TA = −40°C 3
Input offset current (single supply) 1 nA TA = +25°C 3
Average temperature coefficient of input offset current (single supply) 0.5 pA/°C TA = −40°C to +85°C 3
Differential input operating voltage (single supply) -1 1 V TA = −40°C to +85°C 3
Settling time (single supply) 3 µs 0.01%; G = 1, −1 V to +1 V output step; VS = ±5 V 3
Settling time (single supply) 130 µs 0.01%; G = 10, −4.5 V to +4.5 V output step; VS = ±5 V 3
Settling time (single supply) 1 ms 0.01%; G = 100, −4.5 V to +4.5 V output step; VS = ±5 V 3
Gain range G 1 1000 V/V G = 1 + (R2/R1) 3
Gain error (G = 1) 0.02 % VOUT = 0.1 V to 1.1 V, VREF = 0.1 V 4
Gain error (G = 10 to 1000) 0.05 0.1 % VOUT = 0.2 V to 4.8 V 4
Gain vs. temperature (single supply) 10 ppm/°C TA = −40°C to +85°C 4
Operating range, single-supply operation 2.7 36 V Single-supply operation; minimum supply indicated for V+IN, V−IN, VREF = 0 V 4
Quiescent current (single supply) 55 70 90 µA VS = 5 V; TA = +25°C 4
Quiescent current (single supply) 110 µA VS = 5 V; TA = +85°C 4
Quiescent current (single supply) 75 µA VS = 5 V; TA = −40°C 4
Specified temperature range -40 85 °C Specified range 4
Operational temperature range -40 125 °C Operational; see Typical Performance Characteristics for 85°C to 125°C 4
CMRR DC to 60 Hz (dual supply) 92 dB VCM = −10 V to +10 V 5
CMRR at 1 kHz (dual supply) 92 dB VCM = −10 V to +10 V 5
Offset voltage (dual supply) 350 µV VS = ±15 V 5
Average temperature coefficient of offset voltage (dual supply) 1 µV/°C TA = −40°C to +85°C 5
Offset RTI vs. supply (PSR) (dual supply) 100 dB VS = ±15 V 5
Input bias current (dual supply) 20 27 nA TA = +25°C 5
Input bias current (dual supply) 24 nA TA = +85°C 5
Input bias current (dual supply) 30 nA TA = −40°C 5
Input offset current (dual supply) 1 nA TA = +25°C 5
Average temperature coefficient of input offset current (dual supply) 0.5 pA/°C TA = −40°C to +85°C 5
Differential input operating voltage (dual supply) -1 1 V TA = −40°C to +85°C 5
Gain error (G = 1, dual supply) 0.02 % VOUT = ±1 V 5
Gain error (G = 10 to 1000, dual supply) 0.05 0.1 % VOUT = ±10 V 5
Gain vs. temperature (dual supply) 10 ppm/°C TA = −40°C to +85°C 6
Operating range, dual-supply operation 2.7 18 V Dual-supply operation (±VS); minimum positive supply indicated for V+IN, V−IN, VREF = 0 V 6
Quiescent current (dual supply) 70 85 120 µA VS = ±15 V; TA = +25°C 6
Quiescent current (dual supply) 145 µA VS = ±15 V; TA = +85°C 6
Quiescent current (dual supply) 110 µA VS = ±15 V; TA = −40°C 6
Settling time (dual supply) 3 µs 0.01%; G = 1, −1 V to +1 V output step 5
Settling time (dual supply) 130 µs 0.01%; G = 10, −5 V to +5 V output step 5
Settling time (dual supply) 1 ms 0.01%; G = 100, −5 V to +5 V output step 5
Supply voltage 18 V Supply voltage ±18 V (absolute maximum) 7
Storage temperature range -65 150 °C Storage 7
ESD Human Body Model 4 kV Human body model 7
ESD Charge Device Model 1.25 kV Charge device model 7
ESD Machine Model 0.2 kV Machine model 7
Thermal resistance, junction-to-ambient (8-lead MSOP, 4-layer JEDEC board) θJA 135 °C/W Device in free air, 8-lead MSOP, 4-layer JEDEC board 7

CAD (KiCad official)

  • Symbol: AD8420ARMZ
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ad8420armz-etched.step / ad8420armz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad8420armz.step / ad8420armz.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (26 pp, sha256 da4b4aa262a07c7f, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF