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AD8421BRMZ-R7
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Analog Devices Instrumentation Amplifiers, 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
markdownAD8421BRMZ-R7
Analog Devices · Instrumentation Amplifiers · MSOP-8
AD8421BRMZ-R7 from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | -IN | input | Negative differential input pin accepting signals from −VS + 2.3 V to +VS − 1.8 V. |
| 2 | RG | passive | Gain-setting resistor connection pin; place external resistor between pins 2 and 3 to set G = 1 + (9.9 kΩ/RG). |
| 3 | RG | passive | Gain-setting resistor connection pin; place external resistor between pins 2 and 3 to set G = 1 + (9.9 kΩ/RG). |
| 4 | +IN | input | Positive differential input pin accepting signals from −VS + 2.3 V to +VS − 1.8 V. |
| 5 | -VS | power_in | Negative power supply pin for ±2.5 V to ±18 V dual supply operation. |
| 6 | REF | input | Reference voltage input pin with 20 kΩ input impedance for output level shifting; voltage range −VS to +VS. |
| 7 | VOUT | output | Analog output pin with swing from −VS + 1.2 V to +VS − 1.6 V at load resistance RL = 2 kΩ. |
| 8 | +VS | power_in | Positive power supply pin for ±2.5 V to ±18 V dual supply operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-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 |
|---|---|---|---|---|---|---|---|
| CMRR, DC to 60 Hz, G = 1 (BRM) | CMRR | 92 | dB | DC至60 Hz的CMRR，1 kΩ非均衡信号源，VCM = −10 V至+10 V，G = 1 | 5 | ||
| CMRR, DC to 60 Hz, G = 10 (BRM) | CMRR | 112 | dB | DC至60 Hz的CMRR，1 kΩ非均衡信号源，VCM = −10 V至+10 V，G = 10 | 5 | ||
| CMRR, DC to 60 Hz, G = 100 (BRM) | CMRR | 132 | dB | DC至60 Hz的CMRR，1 kΩ非均衡信号源，VCM = −10 V至+10 V，G = 100 | 5 | ||
| CMRR, DC to 60 Hz, G = 1000 (BRM) | CMRR | 140 | dB | DC至60 Hz的CMRR，1 kΩ非均衡信号源，VCM = −10 V至+10 V，G = 1000 | 5 | ||
| CMRR over full temperature, G = 1 (BRM) | CMRR | 90 | dB | 全温度范围，G = 1，TA = −40°C至+85°C | 5 | ||
| CMRR at 20 kHz, G = 1 (BRM) | CMRR | 80 | dB | 20 kHz时的CMRR，VCM = −10 V至+10 V，G = 1 | 5 | ||
| CMRR at 20 kHz, G = 10 (BRM) | CMRR | 90 | dB | 20 kHz时的CMRR，VCM = −10 V至+10 V，G = 10 | 5 | ||
| CMRR at 20 kHz, G = 100 (BRM) | CMRR | 100 | dB | 20 kHz时的CMRR，VCM = −10 V至+10 V，G = 100 | 5 | ||
| CMRR at 20 kHz, G = 1000 (BRM) | CMRR | 100 | dB | 20 kHz时的CMRR，VCM = −10 V至+10 V，G = 1000 | 5 | ||
| Input voltage noise density (BRM) | eni | 3 | 3.2 | nV/√Hz | 1 kHz，VIN+, VIN− = 0 V | 5 | |
| Peak-to-peak RTI voltage noise, G = 1 (BRM) | 2 | 2.2 | µV p-p | f = 0.1 Hz至10 Hz，RTI，G = 1 | 5 | ||
| Peak-to-peak RTI voltage noise, G = 100 to 1000 (BRM) | 0.07 | 0.09 | µV p-p | f = 0.1 Hz至10 Hz，RTI，G = 100至1000 | 5 | ||
| Input offset voltage, VOSI (BRM) | VOSI | 50 | µV | VS = ±5 V至±15 V | 5 | ||
| Input offset voltage over full temperature, VOSI (BRM) | VOSI | 135 | µV | 全温度范围 TA = −40°C至+85°C | 5 | ||
| Input offset voltage average temperature coefficient, VOSI (BRM) | VOSI | 0.9 | µV/°C | 5 | |||
| Output offset voltage, VOSO (BRM) | VOSO | 400 | µV | 5 | |||
| Output offset voltage over full temperature, VOSO (BRM) | VOSO | 1 | mV | 全温度范围 TA = −40°C至+85°C | 5 | ||
| Output offset voltage average temperature coefficient, VOSO (BRM) | VOSO | 9 | µV/°C | 5 | |||
| PSR, G = 1 (BRM) | 100 | 120 | dB | VS = ±2.5 V至±18 V，G = 1 | 6 | ||
| PSR, G = 10 (BRM) | 120 | 140 | dB | VS = ±2.5 V至±18 V，G = 10 | 6 | ||
| PSR, G = 100 (BRM) | 140 | 150 | dB | VS = ±2.5 V至±18 V，G = 100 | 6 | ||
| PSR, G = 1000 (BRM) | 140 | 150 | dB | VS = ±2.5 V至±18 V，G = 1000 | 6 | ||
| Input bias current (BRM) | 0.1 | 1 | nA | 6 | |||
| Input bias current over full temperature (BRM) | 6 | nA | 全温度范围 TA = −40°C至+85°C | 6 | |||
| Input offset current (BRM) | 0.1 | 1 | nA | 6 | |||
| Input offset current over full temperature (BRM) | 1.5 | nA | 全温度范围 TA = −40°C至+85°C | 6 | |||
| Gain range | 1 | 10000 | V/V | 6 | |||
| Gain error, G = 1 (BRM) | 0.02 | % | VOUT = ±10 V，G = 1 | 6 | |||
| Gain error, G = 10 to 1000 (BRM) | 0.2 | % | VOUT = ±10 V，G = 10至1000 | 6 | |||
| Gain nonlinearity, G = 1, RL = 600 Ω (BRM) | 1 | 3 | ppm | VOUT = −10 V至+10 V，G = 1，RL = 600 Ω | 6 | ||
| Gain nonlinearity, G = 10 to 1000 (BRM) | 30 | 50 | ppm | VOUT = −10 V至+10 V，G = 10至1000，RL ≥ 600 Ω | 6 | ||
| Gain nonlinearity, VOUT = ±5 V (BRM) | 5 | 10 | ppm | VOUT = −5 V至+5 V | 6 | ||
| Gain vs temperature, G = 1 (BRM) | 0.1 | 1 | ppm/°C | G = 1 | 6 | ||
| Input bias current reference pin, IIN (BRM) | IIN | 20 | 24 | µA | VIN+, VIN− = 0 V | 7 | |
| Output reference gain (BRM) | -0.0001 | 1 | 0.0001 | V/V | 7 | ||
| Supply voltage, single supply | 5 | 36 | V | 单电源 | 7 | ||
| Supply voltage, dual supply | 2.5 | 18 | V | 双电源 | 7 | ||
| Quiescent (supply) current (BRM) | 2 | 2.3 | mA | 7 | |||
| Quiescent (supply) current over full temperature (BRM) | 2.6 | mA | 全温度范围 TA = −40°C至+85°C | 7 | |||
| Rated performance temperature range | -40 | 85 | °C | 额定性能 | 7 | ||
| Operating temperature range | -40 | 125 | °C | 7 | |||
| Supply voltage (absolute maximum) | -18 | 18 | V | 电源电压 ±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 | 人体模型 | 8 | |||
| ESD charged device model | 1.25 | kV | 充电器件模型 | 8 | |||
| ESD machine model | 0.2 | kV | 机器放电模型 | 8 | |||
| Thermal resistance, junction-to-ambient, 8-lead MSOP | θJA | 138.6 | °C/W | 4层JEDEC PCB，空气中 | 8 |
CAD (KiCad official)
- Symbol:
AD8421BRMZ-R7 - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
ad8421brmz-r7-etched.step/ad8421brmz-r7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad8421brmz-r7.step/ad8421brmz-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 2026-09-22, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).