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AD8420ARMZ
Public Made by Adomby adom
Analog Devices Instrumentation OpAmps, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownAD8420ARMZ
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad8420armz.step/ad8420armz.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).