AD7492ARUZ-5-REEL - 12-Bit 1.25 MSPS SAR ADC | Analog Devices
MPN: AD7492ARUZ-5-REEL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.45 | $745.00 |
| 500 | $6.58 | $3,290.00 |
| 1,000 | $5.91 | $5,910.00 |
AD7492ARUZ-5-REEL Overview
A SAR ADC is a type of data converter that converts an analog input voltage to a digital code through successive comparison against a precision reference, generating one conversion per acquisition cycle without latency. SAR ADCs sit in the broader hierarchy of data converters between flash ADCs (fastest, highest power) and sigma-delta ADCs (highest resolution, slowest). They are the workhorse of industrial, instrumentation, and motor-control applications where deterministic single-shot latency and moderate-to-high throughput are required.
Key features of the AD7492ARUZ-5 include 1.25 MSPS throughput (the -5 grade), a 10 MHz input bandwidth track-and-hold front-end capable of handling full-scale step inputs without distortion, low 4 mW power dissipation at 1.25 MSPS, and a hardware-driven sleep mode (shutdown pin) that drops supply current to under 1 µA between conversions. The internal clock and reference remove two analog components from the BOM, easing layout and reducing bill-of-materials cost.
Architecturally, the AD7492 uses a charge-redistribution capacitor DAC as the successive-approximation core, coupled to a high-bandwidth input SHA. The reference can be internal (2.5 V) or externally overdriven up to VDD for scaled input ranges, giving flexibility for both 3.3 V and 5 V analog rails in mixed-signal designs.
Typical applications include industrial process control loops, data-acquisition front-ends, motor-control current sensing, optical-sensor signal chains, and portable instrumentation where low power and small PCB area are critical. The TSSOP-24 footprint eases routing alongside modern microcontrollers and DSPs with parallel bus interfaces.
When designing with this part, ensure that the VDRIVE logic supply (or VDD) matches the host controller's I/O voltage to avoid level shifters, and place the 0.1 µF VDD decoupling cap within 5 mm of the supply pin. The shutdown pin can be used to stagger multi-channel sampling or to drop system quiescent current in battery-powered applications during sleep intervals.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for AD7492ARUZ-5-REEL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7492ARUZ-5-REEL (same form factor and footprint) — differing in Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7492ARUZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7492BRUZ-5
✅ Drop-In📋 Reference alternative (not in catalog)
AD7492ARUZ-5REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7492ARUZ-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7492BRU-5-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7492ARUZ-5-REEL Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Sample Rate | 1.25 MSPS (AD7492-5 grade) |
| Architecture | SAR (Successive Approximation) |
| Number of Input Channels | 1 single-ended |
| Input Voltage Range | 0 V to 2.5 V (internal ref) or 0 V to VDD (external) |
| Supply Voltage (VDD) | 2.7 V to 5.25 V |
| Internal Reference | 2.5 V (on-chip) |
| Internal Clock | Yes (on-chip) |
| Power Consumption | 4 mW typical at 1.25 MSPS |
| Conversion Time (BUSY high) | 680 ns (-5 grade) |
| Input Bandwidth (Track/Hold) | 10 MHz |
| Data Interface | Parallel, 12-bit wide |
| Package | 24-pin TSSOP (RU-24) |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Shutdown Current | < 1 µA (sleep mode) |
AD7492ARUZ-5-REEL Pin Configuration
| Pin 1 | VDD — Analog supply input, 2.7 V to 5.25 V |
| Pin 2 | REF — Reference input/output (internal 2.5 V) |
| Pin 3 | AGND — Analog ground |
| Pin 4 | VIN — Analog input (single-ended) |
| Pin 5 | NC — Not connected |
| Pin 6 | NC — Not connected |
| Pin 7 | SLEEP — Shutdown / sleep pin (active low) |
| Pin 8 | CONVST — Conversion start input |
| Pin 9 | BUSY — Conversion in progress (active high) |
| Pin 10 | CS — Chip select (active low) |
| Pin 11 | RD — Read input (active low) |
| Pin 12 | DB0 — Data bit 0 (LSB) |
| Pin 13 | DB1 — Data bit 1 |
| Pin 14 | DB2 — Data bit 2 |
| Pin 15 | DB3 — Data bit 3 |
| Pin 16 | DB4 — Data bit 4 |
| Pin 17 | DB5 — Data bit 5 |
| Pin 18 | DB6 — Data bit 6 |
| Pin 19 | DB7 — Data bit 7 |
| Pin 20 | DB8 — Data bit 8 |
| Pin 21 | DB9 — Data bit 9 |
| Pin 22 | DB10 — Data bit 10 |
| Pin 23 | DB11 — Data bit 11 (MSB) |
| Pin 24 | DGND — Digital ground |
Typical Applications
AD7492ARUZ-5-REEL is suitable for 6 applications: Industrial Process Control Loops, Motor Control Current Sensing, Data Acquisition Systems, Optical Sensor Signal Chains, Portable Instrumentation, Audio and Vibration Sampling (Mid-Fidelity).
Industrial Process Control Loops
The AD7492ARUZ-5-REEL's 1.25 MSPS throughput and 680 ns deterministic conversion time make it ideal for industrial process control loops where single-cycle latency is non-negotiable. The 12-bit resolution over a 0 to 2.5 V input from the on-chip reference maps cleanly to 4 to 20 mA current-loop signal chains after a shunt resistor, while the on-chip reference and clock eliminate drift-causing analog ground loops. Designers typically pair it with an external 5 V rail and a small anti-aliasing RC filter; this combination cuts BOM cost versus discrete-ADC implementations while keeping noise performance within process-control budgets.
Recommended
Motor Control Current Sensing
In three-phase motor drives, the AD7492ARUZ-5-REEL digitizes shunt current at 1.25 MSPS - fast enough to oversample PWM cycle currents at 20 kHz with 30+ samples per cycle. Its 680 ns conversion latency fits inside a single PWM period at typical 10 kHz switching frequencies, so the controller can act on the sample within the same cycle and reduce current-loop ripple. The 10 MHz track-and-hold bandwidth handles the high di/dt edges of IGBT turn-off, and the shutdown pin allows asymmetric sampling across phases to cut total system power consumption.
Recommended
Data Acquisition Systems
General-purpose data-acquisition front-ends use the AD7492ARUZ-5-REEL for its 12-bit/1.25 MSPS combination when moderate resolution and predictable throughput matter more than 16-bit precision. The parallel 12-bit data bus pairs directly with microcontrollers and DSPs without glue logic, and the on-chip 2.5 V reference avoids bringing in a dedicated reference IC. For multi-channel systems, designers typically MUX multiple sensors through an external analog switch matrix into the single ADC input, trading channels for throughput at a lower BOM cost than per-channel converters.
Recommended
Optical Sensor Signal Chains
Photodiode and phototransducer interfaces benefit from the AD7492ARUZ-5-REEL's low 4 mW operating power and fast wake-up from its < 1 µA shutdown mode, enabling battery-friendly sample-and-hold operation. The 10 MHz input bandwidth preserves rise/fall times of pulsed optical events, while the 12-bit dynamic range covers a 5-decade photocurrent range when paired with a transimpedance amplifier. Designers typically gate the converter via the shutdown pin to sample only when the optical event is present, extending battery life in portable spectrometry and pulse-oximetry devices.
Recommended
Portable Instrumentation
Handheld oscilloscope probes, multimeters, and field instrumentation use the AD7492ARUZ-5-REEL to keep total system power under 100 mW while still delivering 1.25 MSPS real-time sampling. The internal reference saves board space and the 24-pin TSSOP allows routing alongside standard 8051/PIC microcontrollers with a parallel bus. With a quiescent current under 1 µA in shutdown, the part is well suited to battery-powered instruments that wake periodically to digitize sensor bursts and return to sleep until the next event arrives.
Recommended
Audio and Vibration Sampling (Mid-Fidelity)
For vibration monitoring, ultrasonic rangefinders, and mid-fidelity audio sampling above 40 kHz, the AD7492ARUZ-5-REEL's 1.25 MSPS provides sufficient Nyquist headroom while keeping deterministic latency for synchronized event capture. The 12-bit ENOB and 10 MHz input bandwidth preserve harmonic content up to roughly 300 kHz, useful for vibration harmonics analysis in predictive-maintenance sensors. Designers typically add a small buffer op-amp and a passive anti-alias filter before the analog input, then feed the digital data through a microcontroller's DMA channel for off-line FFT processing.
Recommended
Recommended Products Summary
Engineering reference data for AD7492ARUZ-5-REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7492ARUZ | AD7492BRUZ-5 | AD7492ARUZ-5REEL7 | AD7492ARUZ-REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-pin TSSOP (RU-24) | 24-pin TSSOP (RU-24) - same | 24-pin TSSOP (RU-24) - same | 24-pin TSSOP (RU-24) - same | 24-pin TSSOP (RU-24) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Throughput | 1.25 MSPS (-5 grade) | 1 MSPS | 1.25 MSPS | 1.25 MSPS | 1 MSPS |
| Internal Reference | 2.5 V (on-chip) | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Internal Clock | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Power Consumption | 4 mW typical | 4 mW | 4 mW | 4 mW | 4 mW |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Key Differentiators
- Highest throughput in AD7492 family (vs AD7492ARUZ (non-5 grade))
- Tightened linearity / B-grade option (vs AD7492ARUZ (standard A-grade))
- On-chip reference and clock remove BOM (vs AD7450ARZ-REEL (no internal ref))
Design Notes
Place a 0.1 µF X7R ceramic bypass capacitor within 5 mm of the VDD pin and a 10 µF tantalum or ceramic bulk capacitor at the supply entry point. The internal reference requires at least 1 µF of effective decoupling at REF to keep low-frequency noise below 200 µV p-p; do not load REF with anything below 100 kΩ or the reference accuracy will degrade. Estimated: total supply current at 1.25 MSPS / 5 V is roughly (4 mW / 5 V) = 800 µA typical, plus logic I/O contribution.
Use a single solid ground plane split underneath the IC, with analog and digital grounds joined at a single point near the IC AGND/DGND pins. Route the 12 parallel data bits DB0 to DB11 over the digital ground section, and keep the VIN trace short and isolated to minimize digital-noise coupling. Exposed analog input traces must be guarded with ground traces on both sides if the converter sits near a switching regulator or motor-drive stage.
The 10 MHz input bandwidth track-and-hold can capture and digitize transient noise spikes that would alias into lower frequencies. Add a simple RC anti-aliasing filter (typically 100 Ω + 1 nF = 16 MHz corner) at the input to attenuate above-Nyquist components without adding switch-charge transient distortion. Estimated: with a 5 V full-scale step the track-and-hold acquires in < 50 ns, so rise times faster than the RC cutoff are well preserved.
Driving the CONVST pin with a noisy or undersized pulse will degrade SNR; ensure CONVST has a sub-10 ns rise/fall time and is held low during power-up. Do not leave BUSY floating externally - if unused, tie it to a defined logic state through a 100 kΩ resistor. Avoid leaving the SLEEP pin floating (must be tied high for normal operation) or the converter may enter shutdown randomly. The internal reference cannot source significant current, so do not use REF to bias external circuitry.
Compliance Information
RoHS and lead-free per Analog Devices product page. Not AEC-Q100 qualified for automotive; the AD7492 family is intended for industrial-grade applications. Halogen-free status not explicitly stated in public data.
