ADG1401BRMZ is a high-performance, precision analog switch/multiplexer designed and manufactured by Analog Devices Inc. (ADI). It belongs to ADI’s widely trusted ADG14xx family — characterized by ultra-low on-resistance, ±15 V supply capability, and fault-protected CMOS architecture. This device is optimized for demanding signal-chain applications — especially those requiring high fidelity, low distortion, wide dynamic range, and exceptional robustness in industrial, instrumentation, medical, and automation systems.
Introduction
ADG1401BRMZ is a single-channel, normally-open (NO) SPST (Single-Pole, Single-Throw) precision analog switch, housed in a compact 10-lead MSOP package (suffix: BRMZ). It operates from either dual supplies (±12 V to ±15 V) or a single supply (+12 V to +36 V), and features an exceptionally low on-resistance (typical 0.8 Ω), ultra-flat on-resistance profile (< 0.05 Ω ΔRON), minimal charge injection (< 0.5 pC), ultra-low off-leakage current (< 100 pA @ 25°C), fast switching times (tON ≈ 90 ns, tOFF ≈ 75 ns), and integrated ESD protection (> 4 kV HBM) — collectively ensuring signal integrity, measurement accuracy, and system reliability even under harsh operating conditions.
The suffix BRMZ denotes specific packaging and qualification attributes:
- B: Industrial-grade performance grading (tighter parametric limits);
- R: MSOP (Mini Small Outline Package) footprint;
- M: RoHS-compliant and halogen-free;
- Z: Extended industrial temperature range of –40°C to +125°C, qualified for long-term reliability in demanding environments.
Key Features
✅ Ultra-Low On-Resistance (RON): 0.8 Ω (typ), 1.2 Ω (max) @ ±15 V — minimizes voltage drop, power loss, and gain error in precision signal paths.
✅ Exceptionally Low RON Flatness (ΔRON): < 0.05 Ω (typ) — ensures outstanding linearity and ultra-low harmonic distortion (THD), ideal for audio, high-resolution ADC driving, and precision instrumentation.
✅ Wide Supply Range: Supports dual supplies (±12 V to ±15 V) or single supplies (+12 V to +36 V) — compatible with standard industrial rails (e.g., ±15 V op-amp supplies, 24 V PLC systems).
✅ Fault Protection & Overvoltage Tolerance: Input pins withstand ±40 V beyond supply rails without latch-up or damage — enhances system resilience against miswiring, transients, and field faults.
✅ Ultra-Low Charge Injection (QINJ) & Leakage Current: Typical QINJ = 0.3 pC, max = 0.5 pC; IOFF < 100 pA @ 25°C — critical for precision sample-and-hold circuits, multiplexed data acquisition (DAQ), and microvolt-level signal integrity.
✅ Fast Switching Speed: tON ≈ 90 ns, tOFF ≈ 75 ns (with CL = 100 pF) — supports kHz-range multiplexing and rapid channel scanning.
✅ Ultra-Low Quiescent Current: ICC < 1 µA (typ) — suitable for battery-powered or low-power standby applications.
✅ 10-Lead MSOP Package with Exposed Pad (BRMZ): Compact 3 mm × 3 mm footprint, high pin density, excellent thermal and electrical performance; exposed pad (EP) enables enhanced heat dissipation and low-inductance grounding.
Typical Specification Table
| Parameter |
Specification |
| Manufacturer |
Analog Devices Inc. (ADI) |
| Product Series |
ADG14xx Family (Ultra-Low RON, Fault-Protected CMOS Switches) |
| Model |
ADG1401BRMZ |
| Function |
Single SPST, Normally-Open Analog Switch |
| Supply Voltage Range |
Dual: ±12 V to ±15 V; Single: +12 V to +36 V |
| On-Resistance (RON) |
0.8 Ω (typ), 1.2 Ω (max) @ ±15 V |
| RON Flatness (ΔRON) |
< 0.05 Ω (typ) |
| Charge Injection (QINJ) |
0.3 pC (typ), 0.5 pC (max) |
| Off-Leakage Current (IOFF) |
< 100 pA (typ), < 1 nA (max) @ 25°C |
| Switching Time (tON/tOFF) |
90 ns / 75 ns (CL = 100 pF) |
| ESD Rating (HBM) |
> 4 kV |
| Fault Tolerance |
±40 V (beyond supply rails) |
| Operating Temperature |
–40°C to +125°C (Industrial Grade) |
| Package |
10-lead MSOP with Exposed Pad (BRMZ) |
| RoHS / Green |
Yes (Pb-free, Halogen-free) |
Typical Applications
🔹 Precision Data Acquisition Systems (DAQ): Used as front-end multiplexing switches to drive high-resolution SAR/Σ-Δ ADCs (e.g., AD7606, AD7177), minimizing gain error and integral nonlinearity (INL).
🔹 Automatic Test Equipment (ATE): Replaces electromechanical relays with microsecond-level channel switching, low thermoelectric EMF, and high repeatability — improving test throughput and measurement accuracy.
🔹 Industrial Process Control & PLC Modules: Routes sensor signals (RTD, thermocouples, 4–20 mA receivers), withstanding field surges, reverse polarity, and harsh ambient conditions.
🔹 Medical Instruments: Enables multiplexed front-end selection for ECG/EEG systems and patient-isolated signal paths — preserving weak biopotential signal integrity via ultra-low leakage and charge injection.
🔹 Audio Routing & Professional Mixing Consoles: Low RON and flatness ensure full-bandwidth (20 Hz–20 kHz) signal fidelity and eliminate audible coloration or intermodulation distortion.
🔹 Programmable Gain Amplifiers (PGA) & Filter Arrays: Paired with op-amps to build flexible, low-noise signal-conditioning architectures with programmable topology.
Development & Design Notes
🔧 PCB Layout Best Practices:
- Connect the exposed pad (EP) to a large copper pour tied to the internal ground plane using multiple thermal vias — reduces thermal resistance and suppresses switch-induced noise coupling;
- Keep switch input/output traces short, symmetrical, and routed away from digital noise sources (e.g., MCU clocks, DC–DC inductors); consider guard traces or ground shielding for sensitive analog nodes.
🔧 Power Supply Decoupling:
- Place 100 nF X7R ceramic + 10 µF tantalum or X5R ceramic capacitors close to each supply pin (VDD and VSS); decouple dual supplies independently to prevent common-mode noise coupling.
🔧 Logic Interface Driving:
- The enable (EN) input is CMOS-compatible (1.8 V to 5 V) and includes an internal Schmitt trigger for noise immunity — however, use clean, low-jitter control signals to avoid unintended switching.
🔧 Thermal Management:
- Although quiescent power is negligible, continuous conduction at high load currents (>100 mA) results in ～0.8 mW/mA² power dissipation due to RON. Verify junction temperature (TJ ≤ 150°C) under worst-case conditions; derate RON or reduce current if necessary.
🔧 Reliability Design:
- Leverage its ±40 V fault tolerance to eliminate external TVS diodes or current-limiting resistors (common with standard switches), simplifying BOM and improving MTBF;
- For long-term storage or high-humidity environments, use moisture-sensitive level (MSL) 3 compliant handling — including dry-packaging and pre-reflow baking per JEDEC J-STD-033.
