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AD8421BRZ-R7
Public Made by Adomby adom
Analog Devices Instrumentation Amplifiers, SOIC-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
markdownAD8421BRZ-R7
Analog Devices · Instrumentation Amplifiers · SOIC-8
AD8421BRZ-R7 from Analog Devices, in a SOIC-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 pin of the instrumentation amplifier. |
| 2 | RG | passive | Gain-setting pin; a resistor placed between RG pins sets the gain as G = 1 + (9.9 kΩ/RG). |
| 3 | RG | passive | Gain-setting pin; a resistor placed between RG pins sets the gain as G = 1 + (9.9 kΩ/RG). |
| 4 | +IN | input | Positive input pin of the instrumentation amplifier. |
| 5 | -VS | power_in | Negative power supply pin. |
| 6 | REF | input | Reference voltage pin; drive it from a low-impedance voltage source to level-shift the output. |
| 7 | VOUT | output | Amplifier output pin. |
| 8 | +VS | power_in | Positive power supply pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| 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 | 94 | dB | DC to 60 Hz, 1 kΩ unbalanced source, VCM = −10 V to +10 V, G = 1 | 3 | ||
| Common-mode rejection ratio, G=10 | CMRR | 114 | dB | DC to 60 Hz, 1 kΩ unbalanced source, VCM = −10 V to +10 V, G = 10 | 3 | ||
| Common-mode rejection ratio, G=100 | CMRR | 134 | dB | DC to 60 Hz, 1 kΩ unbalanced source, VCM = −10 V to +10 V, G = 100 | 3 | ||
| Common-mode rejection ratio, G=1000 | CMRR | 140 | dB | DC to 60 Hz, 1 kΩ unbalanced source, VCM = −10 V to +10 V, G = 1000 | 3 | ||
| Common-mode rejection ratio, G=1, full temperature | CMRR | 93 | dB | DC to 60 Hz, 1 kΩ unbalanced source, G = 1, TA = −40°C to +85°C | 3 | ||
| Common-mode rejection ratio at 20 kHz, G=1 | CMRR | 80 | dB | 20 kHz, VCM = −10 V to +10 V, G = 1 | 3 | ||
| Common-mode rejection ratio at 20 kHz, G=10 | CMRR | 100 | dB | 20 kHz, VCM = −10 V to +10 V, G = 10 | 3 | ||
| Common-mode rejection ratio at 20 kHz, G=100 | CMRR | 110 | dB | 20 kHz, VCM = −10 V to +10 V, G = 100 | 3 | ||
| Common-mode rejection ratio at 20 kHz, G=1000 | CMRR | 120 | dB | 20 kHz, VCM = −10 V to +10 V, G = 1000 | 3 | ||
| Input voltage noise density | eni | 3 | 3.2 | nV/√Hz | 1 kHz, VIN+, VIN− = 0 V | 3 | |
| Input voltage noise, 0.1 Hz to 10 Hz, G=1 | 2 | 2.2 | µV p-p | RTI, f = 0.1 Hz to 10 Hz, G = 1 | 3 | ||
| Input voltage noise, 0.1 Hz to 10 Hz, G=100 to 1000 | 0.07 | 0.09 | µV p-p | RTI, f = 0.1 Hz to 10 Hz, G = 100 to 1000 | 3 | ||
| Input offset voltage | VOSI | 25 | µV | VS = ±5 V to ±15 V | 3 | ||
| Input offset voltage, full temperature range | VOSI | 45 | µV | TA = −40°C to +85°C | 3 | ||
| Input offset voltage average temperature coefficient | VOSI | 0.2 | µV/°C | 3 | |||
| Output offset voltage | VOSO | 250 | µV | 3 | |||
| Output offset voltage, full temperature range | VOSO | 0.45 | mV | TA = −40°C to +85°C | 3 | ||
| Output offset voltage average temperature coefficient | VOSO | 5 | µV/°C | 3 | |||
| Power supply rejection ratio (RTI), G=1 | PSR | 100 | 120 | dB | VS = ±2.5 V to ±18 V, G = 1 | 3 | |
| Power supply rejection ratio (RTI), G=10 | PSR | 120 | 140 | dB | VS = ±2.5 V to ±18 V, G = 10 | 3 | |
| Power supply rejection ratio (RTI), G=100 | PSR | 140 | 150 | dB | VS = ±2.5 V to ±18 V, G = 100 | 3 | |
| Power supply rejection ratio (RTI), G=1000 | PSR | 140 | 150 | dB | VS = ±2.5 V to ±18 V, G = 1000 | 3 | |
| Input bias current | 0.1 | 0.5 | nA | 3 | |||
| Input bias current, full temperature range | 6 | nA | TA = −40°C to +85°C | 3 | |||
| Input offset current | 0.1 | 0.5 | nA | 3 | |||
| Input offset current, full temperature range | 0.8 | nA | TA = −40°C to +85°C | 3 | |||
| Gain range | 1 | 10000 | V/V | 4 | |||
| Gain error, G=1 | 0.01 | % | VOUT = ±10 V, G = 1 | 4 | |||
| Gain error, G=10 to 1000 | 0.1 | % | VOUT = ±10 V, G = 10 to 1000 | 4 | |||
| Gain nonlinearity, G=1 | 1 | 3 | ppm | VOUT = −10 V to +10 V, RL = 600 Ω, G = 1 | 4 | ||
| Gain nonlinearity, G=10 to 1000 | 30 | 50 | ppm | VOUT = −10 V to +10 V, RL ≥ 600 Ω, G = 10 to 1000 | 4 | ||
| Gain drift vs temperature, G=1 | 0.1 | 1 | ppm/°C | G = 1 | 4 | ||
| Dual supply operating range | 2.5 | 18 | V | Dual supply (±VS) | 5 | ||
| Single supply operating range | 5 | 36 | V | Single supply | 5 | ||
| Quiescent supply current | 2 | 2.3 | mA | 5 | |||
| Quiescent supply current, full temperature range | 2.6 | mA | TA = −40°C to +85°C | 5 | |||
| Rated performance temperature range | -40 | 85 | °C | 5 | |||
| Operating temperature range | -40 | 125 | °C | Footnote 5: 85°C to 125°C characteristics in typical performance section | 5 | ||
| Reference input current | IIN | 20 | 24 | µA | VIN+, VIN− = 0 V | 4 | |
| Output reference gain | -0.0001 | 1 | 0.0001 | V/V | Printed as 1 ± 0.0001 | 4 | |
| Supply voltage (absolute maximum) | -18 | 18 | V | Printed as ±18 V | 8 | ||
| Storage temperature range | -65 | 150 | °C | 8 | |||
| Operating temperature range (absolute maximum) | -40 | 125 | °C | 8 | |||
| Maximum junction temperature | 150 | °C | 8 | ||||
| ESD, human body model | 2 | kV | Human body model | 8 | |||
| Output voltage noise density | eno | 60 | nV/√Hz | 1 kHz | 3 | ||
| Current noise spectral density | 200 | fA/√Hz | f = 1 kHz | 3 | |||
| Small-signal bandwidth, G=1 | 10 | MHz | −3 dB, G = 1 | 4 | |||
| Small-signal bandwidth, G=10 | 10 | MHz | −3 dB, G = 10 | 4 | |||
| Small-signal bandwidth, G=100 | 2 | MHz | −3 dB, G = 100 | 4 | |||
| Small-signal bandwidth, G=1000 | 0.2 | MHz | −3 dB, G = 1000 | 4 | |||
| 0.001% settling time, G=1 | 1 | µs | 10 V step, G = 1 | 4 | |||
| 0.001% settling time, G=10 | 0.6 | µs | 10 V step, G = 10 | 4 | |||
| 0.001% settling time, G=100 | 0.8 | µs | 10 V step, G = 100 | 4 | |||
| 0.001% settling time, G=1000 | 6 | µs | 10 V step, G = 1000 | 4 | |||
| Slew rate | 35 | V/µs | G = 1 to 100 | 4 | |||
| Differential input impedance (resistance) | 30 | GΩ | Printed as 30//3 GΩ//pF | 4 | |||
| Differential input impedance (capacitance) | 3 | pF | Printed as 30//3 GΩ//pF | 4 | |||
| Thermal resistance, junction-to-ambient (8-lead SOIC) | θJA | 107.8 | °C/W | 4-layer JEDEC PCB, still air | 8 | ||
| Short-circuit current | 65 | mA | 4 |
CAD (KiCad official)
- Symbol:
AD8421BRZ-R7 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ad8421brz-r7-etched.step/ad8421brz-r7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad8421brz-r7.step/ad8421brz-r7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (28 pp, sha256
cee2fa8289e5925e, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).