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AD8421BRMZ

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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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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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AD8421BRMZ

Analog Devices · Instrumentation OpAmps · MSOP-8

AD8421BRMZ 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 -IN input Negative input terminal; the absolute maximum voltage at -IN is -VS + 40 V and the minimum is +VS - 40 V.
2 RG passive Gain-setting terminal; place a resistor across the RG pins to set the gain as G = 1 + (9.9 kΩ/RG).
3 RG passive Gain-setting terminal; place a resistor across the RG pins to set the gain as G = 1 + (9.9 kΩ/RG).
4 +IN input Positive input terminal; the absolute maximum voltage at +IN is +VS - 40 V minimum and -VS + 40 V maximum.
5 -VS power_in Negative power supply terminal; the part operates from ±2.5 V to ±18 V dual supply or 5 V to 36 V single supply.
6 REF input Reference terminal; drive with a low impedance source (below 1 Ω recommended) to level shift the output, and do not exceed +VS or -VS by more than 0.3 V.
7 VOUT output Output terminal, developed with respect to the potential on the REF terminal.
8 +VS power_in Positive power supply terminal; the part operates from ±2.5 V to ±18 V dual supply or 5 V to 36 V single supply.

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
Common-mode rejection ratio, G = 1 CMRR 92 dB DC to 60 Hz, 1 kΩ source imbalance, VCM = −10 V to +10 V, G = 1 5
Common-mode rejection ratio, G = 10 CMRR 112 dB DC to 60 Hz, 1 kΩ source imbalance, VCM = −10 V to +10 V, G = 10 5
Common-mode rejection ratio, G = 100 CMRR 132 dB DC to 60 Hz, 1 kΩ source imbalance, VCM = −10 V to +10 V, G = 100 5
Common-mode rejection ratio, G = 1000 CMRR 140 dB DC to 60 Hz, 1 kΩ source imbalance, VCM = −10 V to +10 V, G = 1000 5
Common-mode rejection ratio over temperature, G = 1 CMRR 90 dB TA = −40°C to +85°C, G = 1 5
Common-mode rejection ratio at 20 kHz, G = 1 CMRR 80 dB VCM = −10 V to +10 V, G = 1 5
Common-mode rejection ratio at 20 kHz, G = 10 CMRR 90 dB VCM = −10 V to +10 V, G = 10 5
Common-mode rejection ratio at 20 kHz, G = 100 CMRR 100 dB VCM = −10 V to +10 V, G = 100 5
Common-mode rejection ratio at 20 kHz, G = 1000 CMRR 100 dB VCM = −10 V to +10 V, G = 1000 5
Input voltage noise density eni 3 3.2 nV/√Hz f = 1 kHz, VIN+, VIN− = 0 V 5
Peak-to-peak input voltage noise, G = 1 2 2.2 µV p-p RTI, f = 0.1 Hz to 10 Hz, G = 1 5
Peak-to-peak input voltage noise, G = 100 to 1000 0.07 0.09 µV p-p RTI, f = 0.1 Hz to 10 Hz, G = 100 to 1000 5
Input offset voltage VOSI 50 µV VS = ±5 V to ±15 V 5
Input offset voltage over temperature VOSI 135 µV TA = −40°C to +85°C 5
Input offset voltage average temperature coefficient VOSI 0.9 µV/°C Average TC 5
Output offset voltage VOSO 400 µV 5
Output offset voltage over temperature VOSO 1 mV TA = −40°C to +85°C 5
Output offset voltage average temperature coefficient VOSO 9 µV/°C Average TC 5
Offset referred-to-input vs. supply (PSRR), G = 1 PSR 100 120 dB VS = ±2.5 V to ±18 V, G = 1 6
Offset referred-to-input vs. supply (PSRR), G = 10 PSR 120 140 dB VS = ±2.5 V to ±18 V, G = 10 6
Offset referred-to-input vs. supply (PSRR), G = 100 PSR 140 150 dB VS = ±2.5 V to ±18 V, G = 100 6
Offset referred-to-input vs. supply (PSRR), G = 1000 PSR 140 150 dB VS = ±2.5 V to ±18 V, G = 1000 6
Input bias current IB 0.1 1 nA 6
Input bias current over temperature IB 6 nA TA = −40°C to +85°C 6
Input bias current average temperature coefficient IB 50 pA/°C Average TC 6
Input offset current IOS 0.1 1 nA 6
Input offset current over temperature IOS 1.5 nA TA = −40°C to +85°C 6
Input offset current average temperature coefficient IOS 1 pA/°C Average TC 6
Gain error, G = 1 0.02 % VOUT = ±10 V, G = 1 6
Gain error, G = 10 to 1000 0.2 % VOUT = ±10 V, G = 10 to 1000 6
Gain nonlinearity, G = 1 1 ppm VOUT = −10 V to +10 V, RL ≥ 2 kΩ, G = 1 6
Gain nonlinearity, G = 1, RL = 600 Ω 1 3 ppm VOUT = −10 V to +10 V, RL = 600 Ω, G = 1 6
Gain nonlinearity, G = 10 to 1000 30 50 ppm VOUT = −10 V to +10 V, RL ≥ 600 Ω, G = 10 to 1000 6
Gain nonlinearity, VOUT = −5 V to +5 V 5 10 ppm VOUT = −5 V to +5 V 6
Gain vs. temperature, G = 1 0.1 1 ppm/°C G = 1 6
Gain range G 1 10000 V/V G = 1 + (9.9 kΩ/RG) 6
Reference input bias current IIN 20 24 µA VIN+, VIN− = 0 V 7
Reference gain to output -0.0001 1 0.0001 V/V Printed 1 ± 0.0001 7
Quiescent current IQ 2 2.3 mA 7
Quiescent current over temperature IQ 2.6 mA TA = −40°C to +85°C 7
Operating supply range, dual supply VS 2.5 18 V Dual supply, ±2.5 V to ±18 V 7
Operating supply range, single supply VS 5 36 V Single supply 7
Temperature range for specified performance TA -40 85 °C For specified performance 7
Operational temperature range TA -40 125 °C Operational 7
Supply voltage VS -18 18 V Printed ±18 V 10
Storage temperature range TSTG -65 150 °C 10
Operating temperature range TA -40 125 °C 10
Maximum junction temperature TJ 150 °C 10
ESD, Human Body Model HBM 2 kV 10
ESD, Charged Device Model CDM 1.25 kV 10
ESD, Machine Model MM 0.2 kV 10
Thermal resistance, junction-to-ambient, 8-lead MSOP θJA 138.6 °C/W Free air, 4-layer JEDEC PCB 10

CAD (KiCad official)

  • Symbol: AD8421BRMZ
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ad8421brmz-etched.step / ad8421brmz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad8421brmz.step / ad8421brmz.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (31 pp, sha256 991a4ef11cb5dacd, retrieved 2026-10-29, 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