AD7893AR-10REEL - 12-Bit 6µs SAR ADC | Analog Devices | SOIC-8
MPN: AD7893AR-10REEL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $22.5 | $22.50 |
| 10 | $19.8 | $198.00 |
| 100 | $16.92 | $1,692.00 |
| 500 | $13.85 | $6,925.00 |
| 1,000 | $11.2 | $11,200.00 |
AD7893AR-10REEL Overview
A SAR ADC is a type of analog-to-digital converter that performs conversions using a binary-search algorithm controlled by an internal successive-approximation register. Within the broader data-converter hierarchy, SAR converters sit between flash ADCs (fast, expensive, low resolution) and sigma-delta ADCs (high resolution, lower bandwidth). SAR ADCs are widely used in industrial control, instrumentation, and process automation where mid-bandwidth 12- to 16-bit conversions with deterministic latency are required.
The defining feature of the AD7893 family is its LC2MOS (Linear-Compatible CMOS) process, which integrates precision bipolar analog circuitry with low-power CMOS logic on a single die. This process delivers 12-bit accuracy with no missing codes and reliable operation over the industrial -40 °C to +85 °C temperature range. The on-chip track/hold front end handles full-scale transients between conversions without an external buffer, and the serial data output reduces pin count versus parallel-output ADCs of equivalent resolution.
In system architecture, the AD7893 typically sits between sensor signal-conditioning circuitry and a microcontroller, DSP, or FPGA that consumes the serial data stream. Its single-supply ±10 V input option simplifies front ends that previously required bipolar analog rails, and the 6 µs conversion time supports multiplexed multi-channel scanning at reasonable per-channel sample rates. Power consumption is approximately 25 mW during conversion, making the part attractive for portable battery-powered instrumentation and motor-control feedback loops.
Typical applications include industrial process control data acquisition boards, motor-speed and position feedback loops, portable medical instrumentation, multi-channel data loggers, and precision sensor signal chains. The 8-pin SOIC footprint saves board area versus larger pin-count parallel ADCs and fits easily on mixed-signal PCBs that already carry an MCU.
When designing with this part, observe the analog-input common-mode range, place a 0.1 µF decoupling capacitor close to the supply pin, and route the serial clock and data lines away from the analog input traces to minimize digital feedthrough. The device is being phased out by Analog Devices, so designers should plan a second source or migration strategy.
This page consolidates distributor pricing, drop-in cross-reference information (including active alternatives such as AD7893ARZ-10REEL7), and practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for AD7893AR-10REEL — 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 AD7893AR-10REEL (same form factor and footprint) — differing in Conversion Time, Input Type, Package, Packaging, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7893ARZ-10REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7893ARZ-10REEL
✅ Drop-In✓ In Stock
$15.04 / Unit
View Datasheet →AD7893AR-10
✅ Drop-In📋 Reference alternative (not in catalog)
AD7893BR-10REEL
✅ Drop-In✓ In Stock
$6.35 / Unit
View Datasheet →AD7893ARZ-5REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7893AR-10REEL Maximum Ratings & Electrical Characteristics
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7893AR-10REEL |
| Converter Type | ADC (SAR Successive Approximation) |
| Resolution | 12 bits |
| Number of Inputs | 1 |
| Input Type | Bipolar (single-ended) |
| Analog Input Voltage Range | ±10 V |
| Supply Voltage | +5 V single supply |
| Conversion Time | 6 µs |
| Data Interface | Serial |
| Architecture | SAR (Successive Approximation Register) with on-chip track-and-hold |
| Package / Case | 8-SOIC (0.154 inch, 3.90 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +85 °C (industrial) |
| Power Consumption | approximately 25 mW (typical, per datasheet) |
| Process Technology | LC2MOS (Linear Compatible CMOS) |
| Lead-Free / RoHS | Lead-free, Tin finish (per Hotenda listing) |
| Packaging | Tape & Reel (REEL) |
AD7893AR-10REEL Pin Configuration
| Pin 1 | VREF — Reference voltage input/output |
| Pin 2 | AGND — Analog ground |
| Pin 3 | VIN — Analog input (±10 V bipolar) |
| Pin 4 | VDD — +5 V power supply |
| Pin 5 | GND — Digital ground |
| Pin 6 | SCLK — Serial clock input |
| Pin 7 | SDATA — Serial data output |
| Pin 8 | CONVST — Conversion start input |
Typical Applications
AD7893AR-10REEL is suitable for 6 applications: Industrial Process Control Data Acquisition, Motor Speed and Position Feedback, Portable Battery-Powered Instrumentation, Multi-Channel Data Logger, Precision Sensor Signal Chains, Mixed-Signal Industrial PCB Applications.
Industrial Process Control Data Acquisition
The AD7893AR-10REEL's ±10 V bipolar input range aligns directly with 4-20 mA current-loop receivers and industrial sensor outputs that naturally swing above and below ground. In a typical multi-channel DAQ board the AD7893 digitizes up to 8 channels through an external multiplexer, with each conversion in 6 µs supporting aggregate throughput above 100 kSPS. The on-chip track/hold removes the need for external buffers, while the serial interface frees MCU pins for digital I/O. Designers can replace the obsolete AD7893AR-10REEL with AD7893ARZ-10REEL7 on the same SOIC-8 footprint without layout changes, simplifying last-time-buy migrations in factory automation systems.
Recommended
Motor Speed and Position Feedback
In servo and stepper control loops, the AD7893AR-10REEL reads the output of position encoders and current-sense amplifiers with 12-bit resolution and 6 µs conversion latency, supporting PWM update rates above 100 kHz. Its ±10 V input range accepts the bipolar output of resolver-to-digital converter front ends and Hall-effect current sensors used in brushless DC motor drives. The single +5 V supply simplifies power design versus older bipolar ADCs that need ±15 V rails, and the LC2MOS process guarantees 12-bit no-missing-codes performance across the industrial -40 °C to +85 °C ambient under continuous duty cycles.
Recommended
Portable Battery-Powered Instrumentation
Drawing approximately 25 mW during conversion, the AD7893AR-10REEL is well matched to handheld test meters, portable medical monitors, and field data loggers where battery life dominates the BOM. The single +5 V supply rail eliminates the need for negative rails, saving cost and PCB area; the SOIC-8 footprint conserves board space against larger parallel-output ADCs. An on-chip track/hold front end means no external buffer, and the serial data output minimizes power draw on the MCU side. Designers should note the obsolete status and migrate to AD7893ARZ-10REEL7 for ongoing production by swapping only the reel packaging code.
Recommended
Multi-Channel Data Logger
Multi-channel environmental, structural, and process loggers use the AD7893AR-10REEL as a backend digitizer in conjunction with analog multiplexers that scan thermocouple, RTD, load cell, and strain-gauge signals. Each conversion takes 6 µs, allowing up to 16 channels to be cycled in 100 µs with sufficient margin for settling windows. The LC2MOS front-end delivers 12-bit accuracy with low integral nonlinearity, supporting 0.025 %-of-FSR measurement precision required for weigh-scale and force-measurement systems. Lead-free replacement AD7893ARZ-10REEL7 fits the same 8-SOIC layout, simplifying inventory management across active and legacy builds.
Recommended
Precision Sensor Signal Chains
Bridge sensors such as load cells, strain gauges, and pressure transducers produce low-level differential outputs that require a bipolar-input ADC; the AD7893AR-10REEL accepts ±10 V with 12-bit resolution in a compact SOIC-8 package. Its track/hold eliminates external sample-and-hold ICs, and the serial interface reduces PCB routing density compared to parallel-output converters. For ultra-low-noise bridge measurement, the AD7893 can be paired with AD8676 or AD8555 precision op-amps in front of the input, delivering system-level noise performance approaching 1 LSB even at full scale. The lead-free 'ARZ' variant is recommended for new designs.
Recommended
Mixed-Signal Industrial PCB Applications
Mixed-signal PCBs that already host an MCU or FPGA benefit from the AD7893AR-10REEL's serial interface, which avoids tying up 12 GPIO lines the way parallel-output ADCs do. The 8-SOIC package routes easily between analog input traces and a digital MCU, supported by separate analog and digital ground pins to keep switching noise out of the 12-bit conversion path. The single +5 V supply matches most digital rails, simplifying power sequencing in PLCs, motor controllers, and sensor interface boards. Designers can migrate to AD7893ARZ-10REEL7 without changing PCB artwork, accelerating redesigns triggered by the original part's obsolete status.
Recommended
Recommended Products Summary
Engineering reference data for AD7893AR-10REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7893ARZ-10REEL7 | AD7893ARZ-10REEL | AD7893AR-10 | AD7893BR-10REEL | AD7893ARZ-5REEL7 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-SOIC | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) |
| Input Voltage Range | ±10 V | ±10 V | ±10 V | ±10 V | ±10 V | ±5 V |
| Conversion Time | 6 µs | 6 µs | 6 µs | 6 µs | 6 µs | 6 µs |
| Lead Finish | Lead, Tin (Pb-bearing) | Lead-free (RoHS) | Lead-free (RoHS) | Lead, Tin (Pb-bearing) | Lead, Tin | Lead-free (RoHS) |
| Lifecycle Status | Obsolete | Active | Active | Obsolete | Obsolete | Active |
| Operating Temperature Range | -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 | -40 °C to +85 °C |
| Reel Size | 13-inch | 7-inch (-REEL7) | 13-inch | Tube (no reel suffix) | 13-inch | 7-inch |
| RoHS Compliance | Non-RoHS (Pb-bearing) | RoHS compliant | RoHS compliant | Non-RoHS | Non-RoHS | RoHS compliant |
Key Differentiators
- Compatible with RoHS active replacement on the same footprint (vs AD7893AR-10 (no reel/tube variant of same MPN))
- Bipolar ±10 V input on a single +5 V supply (vs AD7893ARZ-5REEL7)
- LC2MOS process combines bipolar precision with CMOS power (vs Older pure bipolar ADCs)
Design Notes
Estimated: decouple the +5 V VDD pin with a 10 µF bulk capacitor plus a 0.1 µF X7R ceramic placed within 5 mm of the pin. The 6 µs burst ADC draws transient current during each conversion, and inadequate decoupling causes droop that introduces ±1 LSB conversion-to-conversion variation. Reference design from the Analog Devices AD7893 datasheet recommends separating analog and digital ground returns to avoid digital switching currents from modulating the reference voltage node.
Estimated: keep the analog input trace matched in length to the analog ground return to preserve the 12-bit no-missing-codes performance. Route SCLK and SDATA away from the analog input pin by at least 3X the trace-to-trace spacing to reduce digital feedthrough. Place the trace-side VREF bypass capacitor directly between the VREF pin and AGND, not the digital ground, because high-frequency noise on the reference directly degrades conversion accuracy.
The AD7893AR-10REEL is officially marked obsolete by Analog Devices and DigiKey; new designs should migrate to AD7893ARZ-10REEL7 which uses the same die on the same 8-SOIC footprint but with RoHS-compliant lead finish. Note that the 'ARZ' variant requires a higher peak reflow temperature (~245 °C vs ~220 °C for leaded finishes) per JEDEC J-STD-020. Do not assume the obsolete part will be available for production volume - check last-time-buy status with Analog Devices before committing to new products.
Compliance Information
The AD7893AR-10REEL ('AR' suffix, no 'Z') uses a lead-bearing Tin finish per Hotenda listing. RoHS-compliant equivalent is AD7893ARZ-10REEL7 ('Z' suffix denotes lead-free finish). No AEC-Q100 qualification - this is an industrial-grade ADC.