ADG1433YRUZ-REEL7 is a high-performance, triple-channel, SPDT (single-pole double-throw) analog switch designed and manufactured by Analog Devices Inc. (ADI). It belongs to the low-on-resistance, low-charge-injection ADG14xx family, engineered specifically for precision signal routing in high-fidelity data acquisition, automated test equipment (ATE), medical imaging, and communications systems, where ultra-low RON, excellent channel matching, minimal distortion, and robust rail-to-rail operation are critical.
The “YRUZ” suffix denotes the 20-lead TSSOP package (6.5 mm × 4.4 mm) — a compact, surface-mount, RoHS-compliant, and widely manufacturable package; the “-REEL7” indicates 7-inch tape-and-reel packaging (2,500 units per reel), qualified for industrial temperature range (–40°C to +125°C junction temperature).
â ī¸ Critical Clarification:
The ADG1433 is not a general-purpose analog switch like the CD4066. It is a precision, fully guarded, CMOS-based triple SPDT switch, featuring:
- Three independent, bidirectional SPDT switches, each with ultra-low on-resistance: RON = 1.3 Ω (typ.) at ±15 V supplies, with < 0.15 Ω matching between channels — enabling accurate gain/attenuation switching and calibration-grade signal routing;
- Near-zero charge injection: 0.1 pC (max) — among the lowest in its class, essential for precision sampling circuits (e.g., sample-and-hold, auto-zero amplifiers, delta-sigma modulators);
- Exceptional AC performance: −3 dB bandwidth > 190 MHz, crosstalk < –85 dB @ 10 MHz, and off-isolation > –90 dB @ 10 MHz — preserving signal integrity in wideband applications (e.g., ultrasound, video, IF routing);
- True rail-to-rail analog signal handling: Supports ±5 V to ±16.5 V dual supplies, or +8 V to +16.5 V single supply, with analog input range extending from VSS – 0.2 V to VDD + 0.2 V, allowing overvoltage tolerance and seamless interface with op-amps and ADCs;
- Break-before-make (BBM) switching with < 10 ns dead time, preventing momentary shorts during transitions — crucial for protecting sensitive downstream circuitry.
It consumes only 20 nA quiescent current, supports CMOS/TTL-compatible digital control, and features robust ESD protection — all in a compact 20-pin TSSOP.
Introduction
The ADG1433YRUZ-REEL7 delivers metrology-grade analog switching performance in an ultra-compact, thermally efficient package:
đš Triple precision SPDT in one IC: Replaces multiple discrete switches or complex mux designs — reducing BOM count, layout area, and timing skew across channels while ensuring sub-0.15 Ω matching;
đš Unmatched RON and charge injection: At just 1.3 Ω RON and 0.1 pC max charge injection, it outperforms most competitors (e.g., MAX3535: 3.5 Ω, 0.2 pC) — making it ideal for programmable-gain instrumentation amps, calibrated attenuators, and multi-range DMM front-ends without calibration overhead;
đš High-voltage, high-fidelity operation: With support up to ±16.5 V, it directly interfaces with industrial ±10 V signal chains, op-amp outputs, and high-voltage DACs — no level-shifting required;
đš Zero-power idle state: Only 20 nA IQ means it draws virtually no current in standby — critical for battery-powered portable instruments and always-on sensor hubs.
Its 20-lead TSSOP (YRUZ) package (6.5 mm × 4.4 mm) offers best-in-class power density for precision switches — supporting placement directly adjacent to high-speed ADCs or op-amps on dense PCBs, with minimal thermal coupling and trace inductance.
Key Features
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High-Performance Triple SPDT Switch:
• Configuration: 3 × independent SPDT switches, bidirectional;
• On-resistance (RON): 1.3 Ω (typ.), 2.2 Ω (max) at ±15 V, < 0.15 Ω channel-to-channel matching;
• Charge injection: 0.1 pC (max);
• Leakage current: < 100 pA (max) at +25°C, < 1 nA (max) at +125°C.
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Wide Signal & Supply Range:
• Analog signal range: VSS – 0.2 V to VDD + 0.2 V;
• Supply voltage: Dual: ±5 V to ±16.5 V, or Single: +8 V to +16.5 V;
• Logic interface: CMOS/TTL-compatible (1.8 V to 5 V logic thresholds).
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Exceptional AC & Isolation Performance:
• −3 dB bandwidth: > 190 MHz (per channel);
• Off-isolation: > –90 dB @ 10 MHz, > –70 dB @ 100 MHz;
• Channel crosstalk: < –85 dB @ 10 MHz, < –65 dB @ 100 MHz;
• Turn-on/turn-off time: 20 ns / 15 ns (typ.), BBM dead time < 10 ns.
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Ultra-Low Power & Robust Operation:
• Quiescent current: 20 nA (max) — effectively zero-power in static operation;
• ESD rating: > 4 kV HBM, > 2 kV CDM on all pins;
• Latch-up immunity: > 300 mA per I/O pin (JEDEC JESD78).
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TSSOP-20 (YRUZ) Package & Industrial Qualification:
• 20-Lead TSSOP (6.5 mm × 4.4 mm);
• RoHS-compliant, halogen-free;
• Operating junction temperature: –40°C to +125°C;
• JEDEC J-STD-020 moisture sensitivity level (MSL) 1 — unlimited floor life.
Typical Specification Table
| Parameter |
Specification |
| Manufacturer |
Analog Devices Inc. (ADI) |
| Product Series |
ADG14xx Family (Precision High-Speed Analog Switches) |
| Model |
ADG1433YRUZ-REEL7 |
| Function |
Triple-Channel SPDT Analog Switch |
| Switch Type |
Bidirectional, Break-Before-Make (BBM) |
| On-Resistance (RON) |
1.3 Ω (typ.), 2.2 Ω (max) @ ±15 V |
| RON Matching |
< 0.15 Ω (max) |
| Charge Injection |
0.1 pC (max) |
| Leakage Current (max) |
100 pA (+25°C), 1 nA (+125°C) |
| Analog Signal Range |
VSS – 0.2 V to VDD + 0.2 V |
| Supply Voltage Range |
Dual: ±5 V to ±16.5 V; Single: +8 V to +16.5 V |
| Logic Interface |
CMOS/TTL (1.8 V to 5 V compatible) |
| −3 dB Bandwidth |
> 190 MHz |
| Off-Isolation @ 10 MHz |
> –90 dB |
| Crosstalk @ 10 MHz |
< –85 dB |
| Turn-On/Off Time (typ.) |
20 ns / 15 ns |
| Quiescent Current |
20 nA (max) |
| Package |
20-Lead TSSOP (6.5 mm × 4.4 mm) (YRUZ) |
| RoHS / Green |
Yes (Pb-free, Halogen-free) |
| Packaging |
7-inch Reel, 2,500 units (REEL7) |
Typical Applications
đš High-Resolution Data Acquisition: Programmable gain/attenuation in 24-bit DAQ systems (e.g., AD7177, LTC2500), multi-range bench DMMs, and precision sensor hubs — leveraging sub-0.15 Ω matching and near-zero charge injection for calibration-free accuracy.
đš Medical Imaging & Ultrasound: Beamformer channel selection, TGC path switching, and echo signal routing — enabled by high bandwidth (>190 MHz), ultra-low crosstalk (< –85 dB), and rail-to-rail ±15 V swing.
đš Automated Test Equipment (ATE): Precision stimulus routing, reference switching, and DUT signal multiplexing — benefiting from ultra-low leakage (<100 pA), matched RON, and fast settling.
đš Industrial Process Control: Multiplexed sensor inputs (±10 V RTDs, strain gauges, pressure transducers) in PLC analog modules — supported by wide supply range and robust ESD/latch-up immunity.
đš Audio & Video Routing: Professional audio mixers, broadcast video switchers, and HDMI auxiliary path switching — enabled by low distortion, high bandwidth, and low crosstalk.
đš Calibration Equipment & Metrology: Reference divider networks, programmable attenuators, and self-calibrating instrument architectures — where <0.15 Ω matching ensures traceable accuracy.
Development & Design Notes
đ§ PCB Layout Best Practices:
- Keep analog traces short and symmetrical — minimize parasitic capacitance/inductance that degrades bandwidth and increases crosstalk.
- Use ground guard rings around analog signal paths (especially COM, NO, NC pins) — reduces coupling between adjacent channels.
- Route digital control lines (A0–A2, EN) away from analog paths and add series 33 Ω resistors near the ADG1433 — dampens ringing and reduces EMI.
đ§ Power Supply Decoupling:
- Place 100 nF X7R ceramic capacitors within 2 mm of each supply pin (VDD, VSS, GND) — critical for clean switching and stable RON.
- For dual-supply operation: add a 10 nF capacitor between +VDD and –VSS, close to the IC — suppresses inter-rail noise.
đ§ Signal Integrity & Timing Optimization:
- For glitch-free switching: ensure EN and address lines (A0–A2) are synchronized — use a common clock domain or add small RC delays if needed.
- To reduce charge injection effects in sampling circuits: add a small (1–10 pF) capacitor from COM to GND — acts as a charge sink and improves settling.
đ§ Thermal Management & Reliability:
- TSSOP-20 has good thermal capability (θJA ≈ 105°C/W). For continuous high-current operation (>10 mA per channel), add ≥ 100 mm² copper pour under the IC.
- FIT rate = 13 failures per billion hours, among the lowest for precision switches — suitable for 20+ year deployments in infrastructure.
đ§ Calibration & Accuracy Optimization:
- For metrology-grade applications, characterize RON vs. signal voltage and temperature — enables software compensation to < 0.05 Ω effective error.
- To minimize thermal EMFs, avoid dissimilar metals (e.g., gold-plated connectors) in the analog path and use copper-only PCB traces.
