Analog allocation did not loosen in Q4 2026 — if anything, the parts that matter most to industrial and instrumentation designers are the ones still quoted at 26-week lead times, or offered only through brokers at multiples of list price. This month we took delivery of several high-demand ADI families in meaningful volume. Below is what landed, what each part is actually for, and the specification traps that cost designers time and money.
What Just Landed
| Part Number | Function | Package | On Hand |
|---|---|---|---|
| AD7124-4BCPZ-RL7 | 24-bit, 4-channel Σ-Δ ADC with PGA | LFCSP-32 | 13,500 |
| ADG419BRZ-REEL7 | SPDT analog switch, low leakage | SOIC-8 | 20,000 |
| MAX2659ELT+T | GNSS/GPS low-noise amplifier | µDFN-6 | 20,000 |
| AD8656ARMZ-REEL | Dual precision op amp, 2.7 nV/√Hz | MSOP-8 | 15,000 |
| AD5700-1BCPZ-RL7 | Low-power HART modem | LFCSP-24 | 6,000 |
| AD7606C-18BSTZ-RL | 8-channel, 18-bit simultaneous-sampling ADC | LQFP-64 | 3,000 |
These are not speculative broker lots. They came through our regular distribution channel with traceable lot numbers, and they are physically in the warehouse — not "in transit, ETA TBD."
AD7124-4: The 24-Bit Workhorse for Sensor Front Ends
The AD7124-4 shows up in almost every precision measurement design we quote: thermocouple and RTD transmitters, weigh scales, gas analyzers, pressure and flow instrumentation. It is an integrated 4-channel Σ-Δ ADC with a programmable gain array, a precision reference, and the ability to switch between fully differential and single-ended inputs channel by channel.
Why designers keep choosing it: one part replaces an ADC plus an external PGA plus a reference buffer, which matters when the board is 20 mm wide and must run from a 3.3 V rail at microamp average current.
The four-channel detail worth knowing: the AD7124-4 is genuinely 4-channel. If your design needs eight single-ended sensors, that is the AD7124-8, not a "4-channel part with an external mux." Every mux you add in front of a 24-bit converter injects charge-injection error and leakage that shows up as offset drift, and chasing it later is expensive.
A spec trap on the PGA: the gain range extends to 128, but the usable effective resolution at high gain depends on the output data rate you select. At 128 gain and a fast update rate, the noise floor is not the one printed in the front-page headline. If you are digitizing a 10 mV thermocouple, budget your filter settling time around the lowest ODR that still satisfies your loop rate, then verify effective resolution with the noise tables — not the marketing number.
What the market looks like: lead times on the AD7124 family have been running 20–30 weeks for the past year, with broker pricing on the RL7 reel variants well above list. We are holding 13,500 pieces across the -4 and -8 variants, which is enough to cover production builds rather than just sample quantities.
AD7606C-18: When Simultaneity Is the Requirement
The AD7606C-18 is the 18-bit member of the AD7606 family: eight channels, true simultaneous sampling, on-chip analog front-end with overvoltage clamping, and an internal reference. It is the default answer for power quality analyzers, protection relays, three-phase energy monitoring, and motor-drive current sensing — anywhere phase relationships between channels carry the actual information.
The selection decision that trips people up: the three common family members are not interchangeable on accuracy alone.
- AD7606B (16-bit) covers most protection-relay and general industrial monitoring work at the lowest cost.
- AD7606C-18 (18-bit) buys four extra bits of resolution and a better noise floor — this is what you reach for when you are measuring small signals on top of a large common-mode, such as shunt voltages in a high-voltage inverter, or when you need the analyzer-class dynamic range for harmonics analysis up to the 50th order.
- Channel count and package stay the same across the family (8 channels, LQFP-64), which means an 18-bit upgrade can often be a drop-in change on an existing layout — worth checking pin-out before you redesign a board.
Layout note that matters more at 18 bits: at this resolution the reference and the analog input return paths dominate performance. Bring the REFIN/REFOUT decoupling back to the ADC ground plane with a short, wide path, and do not route digital lines under the analog input pins. Designs that pass at 16 bits routinely fail ENOB targets at 18 bits for reasons that have nothing to do with the converter.
We are also holding 1,500 pieces of the AD7606B (16-bit) if your build does not need the extra resolution.
MAX2659: The GNSS Front End That Keeps Getting Designed In
The MAX2659 is a GPS/GNSS low-noise amplifier for the 1575 MHz band: 20.5 dB of gain, a 1.6 dB noise figure, and roughly 4 mA of supply current in a 6-pin µDFN. It sits between the antenna and the receiver in vehicle trackers, fleet telematics, asset tags, and industrial positioning modules.
Why availability here is unusual: GNSS LNA demand has been pulled up hard by automotive telematics and asset-tracking rollouts, and the µDFN-6 packages in this power class are among the first parts to go on allocation because they share capacity with much higher-volume consumer RF front ends.
Two design points that decide whether the LNA helps or hurts:
- Noise figure is set by the first stage, so the match matters more than the gain. A 1.6 dB NF amplifier in front of a poorly matched SAW filter delivers worse system NF than the datasheet suggests. Match to the antenna/filter interface first, then tune gain.
- Adjacent-channel and out-of-band blocking. A cell tower or a nearby transmitter can desensitize a GNSS front end even though the in-band noise figure looks perfect. If your product ships into dense urban deployments, check the input P1dB and blocking performance against your actual RF environment, not just the lab bench.
AD8656: 2.7 nV/√Hz in a SOT/MSOP Footprint
The AD8656 is a dual precision op amp with 2.7 nV/√Hz input voltage noise, rail-to-rail output, and enough bandwidth to serve as an active filter or ADC driver without a second stage. It is the practical middle ground between cheap general-purpose CMOS op amps that are too noisy for a 16-bit front end, and large-die precision parts that cost several times more.
Typical landing spots: 16–18-bit ADC input buffers, low-noise sensor conditioning, audio-band filtering in instrumentation, and active anti-alias stages ahead of the converters above.
The trap with low-noise CMOS op amps: input voltage noise is not the whole noise budget. Current noise multiplied by your source impedance can dominate, and it is the term designers forget. With a high-impedance sensor or a large feedback network, a 2.7 nV/√Hz part can underperform a 4 nV/√Hz bipolar part, because the current-noise contribution outweighs the voltage-noise advantage. Work out both terms against your actual source resistance before selecting.
AD5700-1: The HART Modem That Industrial Transmitters Still Need
The AD5700-1 is a low-power HART modem with an integrated oscillator — the single-chip interface between a 4–20 mA loop and a digital HART master. It appears in pressure, temperature, flow, and level transmitters, plus HART-enabled I/O modules and handheld communicators.
HART is a 1980s protocol that refuses to die, because the installed base of 4–20 mA loops in process plants is enormous and nobody rips out a working refinery control loop to install fieldbus. Every new transmitter design still needs a HART modem, and the parts that serve that market are low-volume, dedicated, and chronically tight.
Design note: the AD5700-1 integrates the oscillator, which removes the external crystal and its tolerance stack from the design — a real simplification for loop-powered transmitters where every microamp of quiescent current counts against the 4 mA lower limit. If you are already designed around the external-oscillator variant, the two are not pin-compatible; check the pin-out before substituting.
We currently hold both the AD5700-1BCPZ-RL7 (LFCSP-24) and the AD5700-1ACPZ-RL7 package variant.
ADG419: The Uninteresting Part You Run Out Of
Twenty thousand pieces of the ADG419, an SPDT analog switch in SOIC-8. It is not glamorous. It is the part that quietly appears in hundreds of designs as a signal router, a gain-range selector, or a calibration-path switch — and it is exactly the kind of commodity analog part that disappears during an allocation cycle, because wafer capacity goes to higher-margin products.
Why the ADG419 specifically: low leakage current and low charge injection make it usable in front of precision converters. A switch with high charge injection placed ahead of a 24-bit ADC will produce a voltage glitch at every commutation, and no amount of post-filtering fully removes it. If you are multiplexing a precision sensor, this is the parameter to check first, ahead of on-resistance.
How to Think About Sourcing Right Now
Three things are true simultaneously in Q4 2026:
- List-price lead times are still long for precision analog. The AD7124 and AD7606 families in particular have not returned to normal availability, and forecast-based allocation favors customers with long-term agreements.
- Broker inventory exists, but the quality signal is weak. Parts with date codes from mixed years, re-reeled partials, and no traceable chain are a real risk for a 24-bit measurement design. Counterfeit analog ICs are typically re-marked lower-grade or different-temperature-range die, and they fail in ways that only show up at temperature or after months in the field.
- Availability is a design input, not a purchasing afterthought. If a part is on 26-week lead time, designing it in as a single source is a supply-chain decision you are making on the schematic page.
Our stance is the boring one: buy through channel partners with traceable lots, hold real physical stock on the fast-moving families, and tell customers honestly what is on the shelf and what is on order.
What We Can Ship
Stock above is live in our warehouse and available for immediate allocation, with lot traceability on all of it. If you are working on an instrument, a motor drive, a transmitter, or a positioning product and one of these families is blocking your build, send us the part numbers and quantities and we will confirm availability, date codes, and pricing the same day.
For designers who are still at the selection stage, our ADC selection guide covers the SAR versus Σ-Δ versus pipeline trade-off in more depth, and the op-amp selection guide walks through the noise and bandwidth decisions that sit in front of these converters.
A note on our stock figures: quantities shown are actual warehouse holdings at the time of writing. Analog allocation moves week to week, so confirm current availability before committing to a production schedule.
