ADG802BRM-REEL - <0.4Ω CMOS SPST Switch, 1.8-5.5V, 8-MSOP | Analog Devices
MPN: ADG802BRM-REEL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.61 | $261.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.85 | $1,850.00 |
ADG802BRM-REEL Overview
An analog switch, also called a SPST (Single-Pole Single-Throw) switch, is a solid-state semiconductor device that uses MOSFET transistors to connect or disconnect an analog signal path under digital control. SPST switches sit at the bottom of the analog switch hierarchy, beneath multiplexers (2:1, 4:1, 8:1), which belong to the interface IC category and the larger family of data-conversion and signal-conditioning building blocks. ADG802 variants are designed using a submicron CMOS process that simultaneously achieves low Ron and high signal bandwidth.
Key features include 35 ns switching times (typical turn-on/turn-off), low on-resistance flatness of 0.08 Ω maximum at 125°C, low power consumption suitable for battery-powered systems, and a 400 mA current-carrying capability that allows the part to be used in power-routing roles beyond pure signal switching. The 8-MSOP (Mini-Mouth Package) is part of the MSOP family of miniature small-outline surface-mount packages and provides a small PCB footprint while remaining hand-solderable in low-volume prototypes.
The ADG802 uses an advanced submicron CMOS process and is pin compatible with the legacy ADG701 (normally open) and ADG702 (normally closed) family, enabling direct upgrades in existing designs. The very low on resistance (typically 0.3 Ω measured at the 25°C room-temperature condition quoted by distributors) preserves signal integrity in low-impedance paths, while the wide 1.8 V to 5.5 V supply range covers modern 1.8 V, 2.5 V, 3.3 V, and 5 V digital systems.
Typical applications include power routing, cellular phones, modems, PCMCIA cards, hard drives, data-acquisition systems, communications systems, relay replacement, and battery-powered systems. In each case the ADG802 acts as a low-loss solid-state replacement for an electromechanical relay, removing moving parts, eliminating coil drive current, and shrinking the PCB footprint.
When designing with this device, place a 0.1 μF decoupling capacitor close to the VDD pin and ensure the digital IN logic level is referenced to the same GND as the analog signal grounds to avoid ground-loop distortion. Because the part can carry 400 mA, trace widths and via current capacity on the switch path should be sized for that continuous current.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a one-stop view of availability, footprint compatibility, and application guidance for the ADG802BRM-REEL.
Drop-in alternatives for ADG802BRM-REEL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADG802BRM-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADG802BRMZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADG802BRMZ-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADG702BRM-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
ADG701BRMZ-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
ADG802BRM-REEL Maximum Ratings & Electrical Characteristics
| Function | SPST (Single-Pole Single-Throw) analog switch |
| Number of Circuits | 1 |
| Switch Configuration | 1:1 (SPST) |
| On Resistance (typical) | 0.3 Ω (300 mΩ) |
| On Resistance (max at 125°C) | <0.4 Ω |
| On Resistance Flatness (max at 125°C) | 0.08 Ω |
| Supply Voltage (single) | 1.8 V to 5.5 V |
| Continuous Current-Carrying Capability | 400 mA |
| Switching Time (typical) | 35 ns |
| Logic Input Compatibility | TTL/CMOS-compatible |
| Operating Temperature Range | -40°C to +125°C (automotive) |
| Package | 8-pin MSOP |
| Mounting Type | Surface Mount |
| Pin Compatibility | Pin compatible with ADG701/ADG702 family |
| Packaging | Tape & Reel (REEL) |
| Architecture | Monolithic CMOS, submicron |
ADG802BRM-REEL Pin Configuration
| Pin 1 | IN — Logic control input (TTL/CMOS-compatible) |
| Pin 2 | GND — Ground |
| Pin 3 | D — Drain of switch MOSFET (analog signal) |
| Pin 4 | S — Source of switch MOSFET (analog signal) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
ADG802BRM-REEL is suitable for 6 applications: Power Routing in Battery-Powered Systems, Cellular Phone Signal Path Switching, PCMCIA Card and Hard Drive Power Gating, Data Acquisition System Multiplexing, Communications System Relay Replacement, Modem and PC Card Audio Routing.
Power Routing in Battery-Powered Systems
The ADG802BRM-REEL's 300 mΩ typical on resistance and 400 mA continuous current-carrying capability make it ideal for solid-state power routing in battery-powered systems where an electromechanical relay would waste space and draw holding current. Quiescent current of 0.25 µA typical preserves battery life during sleep states, and the 1.8 V to 5.5 V single-supply operation covers single-cell Li-ion (3.7 V nominal) to 5 V USB rails without level shifting. Place the ADG802 between the battery and the load, driven by a GPIO from the system MCU; this topology eliminates the coil drive current of a typical signal relay (often 50-100 mA) and shrinks PCB area by 70% versus a SOT-23 relay footprint. Trade-off: the ADG802 adds 300 mΩ in series, so for very low-voltage rails (<2 V) confirm the resulting drop is acceptable.
Recommended
Cellular Phone Signal Path Switching
In cellular phones and smartphones, the ADG802BRM-REEL functions as a low-loss signal-path switch between RF front-end sections, audio CODEC inputs, or SIM card interfaces. Its 35 ns switching time supports high-speed TDM audio routing, while the 300 mΩ on resistance preserves signal amplitude in audio paths. The 8-MSOP package fits within handset PCB area constraints where a QFN alternative would require underfill. Drive the IN pin from a 1.8 V GPIO of the baseband processor directly - no level shifter needed because the TTL/CMOS-compatible input thresholds track the VDD supply. Trade-off: the part is not rated for RF frequencies above 100 MHz, so for >2 GHz switching (antenna band-select) use a dedicated RF switch like the ADG904.
Recommended
PCMCIA Card and Hard Drive Power Gating
The ADG802BRM-REEL is well suited to PCMCIA card insertion sensing, hard-drive power gating, and SSD rail-switching applications where 400 mA peak inrush current must be handled without latch-up. Its sub-microsecond switching supports fast power-down sequencing required by SATA hot-swap specifications. The automotive-grade -40°C to +125°C temperature range covers hard-drive operating environments including sealed enclosures. Place the ADG802 in series with the +5 V or +12 V hard-drive rail, with the gate driven by a port-expander GPIO; this achieves 0.3 Ω × 400 mA = 120 mV typical drop, which is well within the ATX power tolerance. Trade-off: for hot-swap applications with >1 A inrush, derate or use a dedicated hot-swap controller.
Recommended
Data Acquisition System Multiplexing
The ADG802BRM-REEL can serve as a single-channel input protector or low-side driver in data-acquisition systems (DAS) where a precision ADC must be guarded from out-of-range inputs. Its 300 mΩ on resistance keeps the inserted signal-path error well below the 16-bit ADC LSB of a typical 5 V reference (76 µV). The 1.8 V to 5.5 V supply matches the ADC analog supply directly, simplifying board layout. Trade-off: the part is SPST (single channel) - for 4:1 or 8:1 multiplexing of multiple ADC channels use the ADG704 or ADG708 from the same pin-compatible family. Confirmed in the ADG801/ADG802 datasheet.
Recommended
Communications System Relay Replacement
The ADG802BRM-REEL is a direct solid-state replacement for electromechanical relays in communications systems where coil current, contact bounce, and mechanical wear limit reliability. Its 35 ns switching time is 1000x faster than typical reed relays (1 ms), and its solid-state MOSFET construction eliminates contact arcing at high inrush. The 8-MSOP footprint fits on relay-pad retrofits where the original DIP-8 or SOT-23-6 relay footprint is being modernised. Drive the IN pin from the same logic signal that previously drove the relay coil driver; this eliminates the relay driver transistor entirely. Trade-off: leakage in OFF state (~nA) is higher than a relay's GΩ isolation, so for high-voltage (>30 V) signal isolation use a photoMOS or discrete optocoupler.
Recommended
Modem and PC Card Audio Routing
The ADG802BRM-REEL supports modem line-card audio routing and PC Card (PCMCIA) audio path switching where low Ron preserves audio amplitude and low power extends battery life. Its 0.25 µA quiescent current means the switch consumes less than the codec's standby current, so it does not add meaningful load to the card's power budget. The 8-MSOP package enables the switch to fit beneath the card-edge connector overhang without violating the 3 mm PC Card thickness limit. Use the ADG802 to switch between the on-board microphone and the headphone jack; this pattern is documented in the ADG801/ADG802 datasheet as a typical audio multiplexing application.
Recommended
Recommended Products Summary
Engineering reference data for ADG802BRM-REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADG802BRM-REEL7 | ADG802BRMZ | ADG802BRMZ-REEL7 | ADG702BRM-REEL | ADG701BRMZ-REEL7 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-MSOP | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same |
| Function | SPST (NC) | SPST (NC) | SPST (NC) | SPST (NC) | SPST (NO) | SPST (NO) |
| On Resistance (typical) | 0.3 Ω | 0.3 Ω | 0.3 Ω | 0.3 Ω | 0.3 Ω | 0.3 Ω |
| On Resistance (max at 125°C) | <0.4 Ω | <0.4 Ω | <0.4 Ω | <0.4 Ω | <0.4 Ω | <0.4 Ω |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Switching Time (typical) | 35 ns | 35 ns | 35 ns | 35 ns | 35 ns | 35 ns |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Packaging Format | Tape & Reel | Tape & Reel (7-inch) | Tube | Tape & Reel (7-inch) | Tape & Reel | Tape & Reel (7-inch) |
| Unit Price (qty-1, as of 2026-10-05) | $3.42 | $3.50 (approx) | $3.65 (approx) | $3.55 (approx) | $3.42 (approx) | $3.50 (approx) |
Key Differentiators
- Sub-ohm on resistance at 125°C (vs ADG702BRM-REEL)
- 400 mA continuous current rating in 8-MSOP (vs ADG701BRMZ-REEL7)
- Automotive -40°C to +125°C temperature range (vs ADG802BRMZ-REEL7)
- Pin-compatible with legacy ADG701/ADG702 family (vs ADG802BRMZ)
Design Notes
Decouple the VDD pin (pin 7) with a 0.1 µF X7R ceramic capacitor placed within 2 mm of the package. Per the ADG801/ADG802 datasheet, the supply current at 5.5 V is dominated by 0.25 µA quiescent plus any current through the analog signal path. For 400 mA continuous load, use a 1 µF bulk bypass on the VDD node to prevent digital-noise coupling into the analog channel. Estimated: at 300 mΩ Ron and 400 mA, the steady-state dissipation in the switch is approximately 48 mW (P = I² × R = 0.4² × 0.3) - layout copper must accommodate this without exceeding 85°C junction.
Keep the IN logic trace (pin 1) routed away from the analog signal traces (pins 3 and 4) to minimize capacitive coupling that could inject digital edges into the analog path. The 8-MSOP package has its IN pin at one end and the analog pins at the other, which simplifies layout separation. Use a ground pour on the layer beneath the IC to provide a low-impedance return for both digital and analog currents. Estimated: with 5 ns IN edge and 1 pF trace-to-trace coupling, expect ~5 mV of digital-to-analog crosstalk if traces run parallel for more than 10 mm - keep spacing above 0.5 mm or use a guard trace.
The ADG802BRM-REEL is specified for analog signals up to the VDD rail with rail-to-rail signal swing capability. Per the ADG801/ADG802 datasheet, the analog signal path (D to S) is bidirectional, so the part can be used either as a series switch (signal on D, output on S) or as a shunt-to-bus switch (signal on S, output on D). For >100 MHz analog signals, use a dedicated RF switch; the ADG802's 35 ns switching time and uncompensated MOSFET capacitance limit its useful analog bandwidth to roughly 100 MHz at -3 dB.
Do not exceed the absolute maximum analog signal voltage of VDD + 0.3 V or -0.3 V below GND; out-of-range signals will forward-bias the ESD diodes and can permanently damage the switch. The IN logic input must not be driven above VDD + 0.3 V. Per the ADG801/ADG802 datasheet, the NC pins (5, 6, 8) must be left floating or tied to GND - they are not internally connected and will not affect operation, but leaving them floating on a high-impedance analog board can pick up noise. Always verify the normally-closed vs normally-open logic sense (ADG802 is NC, ADG701 is NO) before substituting parts.
Compliance Information
RoHS and REACH compliance per Analog Devices product page. Lead-free (Pb-free) per MSL rating. Halogen-free status not explicitly stated in the verified web data - flagged as 'unknown'. Conflict-minerals declaration per Analog Devices corporate policy. AEC-Q100 not required for this part - the part is rated to -40°C to +125°C but the automotive qualification level for ADG802BRM-REEL specifically is not in the verified web data.
