AD7813YRZ-REEL - 10-Bit 400 kSPS SAR ADC, 16-SOIC | Analog Devices
MPN: AD7813YRZ-REEL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.85 | $68.50 |
| 100 | $6.1 | $610.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.8 | $4,800.00 |
AD7813YRZ-REEL Overview
A successive-approximation ADC is a precision data-conversion architecture that uses an internal binary-weighted capacitor DAC and a comparator to resolve one bit per clock cycle. Within the broader converter taxonomy, a SAR ADC sits below pipelined and sigma-delta ADCs in raw sample-rate capability but above them in latency determinism: every conversion completes in a fixed number of cycles (here 10), making the AD7813 well suited to multiplexed data-acquisition systems and event-driven DSP sampling where predictable, low-latency conversion is more valuable than the highest possible throughput.
Key electrical features include 400 kSPS maximum throughput, 2.7 V–5.5 V single-supply operation, an input range of 0 V to VREF (where VREF is the supply on the REF pin), low power consumption (typically around 10 mW at 5 V), and guaranteed operation over the -40 °C to +105 °C industrial temperature range. The 8-/10-bit software-selectable resolution adds flexibility when SNR requirements vary between channels. The on-chip clock oscillator eliminates the need for an external ADC clock, simplifying PCB layout in space-constrained designs.
Typical applications include industrial process control front-ends, portable instrumentation and battery-powered data loggers, DSP front-end signal conditioning, motor control feedback loops, and multiplexed data-acquisition systems. The wide supply range makes the part directly compatible with both 3.3 V and 5 V microcontrollers without level translation. When designing the analog input path, place a small anti-alias RC filter (typically 100 Ω + 1 nF) ahead of the analog input pin and keep the digital return currents physically separated from the analog ground pour to preserve the converter's SNR.
Drop-in alternatives for AD7813YRZ-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:
AD7813YRZ-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7813YRZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7813YR
✅ Drop-In📋 Reference alternative (not in catalog)
AD7813YR-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7813YRZ-REEL Maximum Ratings & Electrical Characteristics
| Resolution | 10 bit (8-/10-bit software-selectable) |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Maximum Sample Rate | 400 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Analog Input Voltage Range | 0 V to VREF |
| Reference Voltage | Externally supplied on REF pin (typically VDD) |
| Conversion Time | 2.3 µs (typical) |
| Digital Interface | 8-bit-wide parallel |
| Operating Temperature Range | -40 °C to +105 °C |
| Package | 16-SOIC (R-16), 0.154 inch / 3.90 mm width |
| Mounting Type | Surface Mount |
| Packing Method | Tape & Reel |
| Screening Level | Industrial |
| RoHS Status | Compliant |
AD7813YRZ-REEL Pin Configuration
| Pin 1 | DB0 — Parallel data output bit 0 (LSB) |
| Pin 2 | DB1 — Parallel data output bit 1 |
| Pin 3 | DB2 — Parallel data output bit 2 |
| Pin 4 | DB3 — Parallel data output bit 3 |
| Pin 5 | DB4 — Parallel data output bit 4 |
| Pin 6 | DB5 — Parallel data output bit 5 |
| Pin 7 | DB6 — Parallel data output bit 6 |
| Pin 8 | DB7 — Parallel data output bit 7 (MSB in 8-bit mode) |
| Pin 9 | AGND — Analog ground |
| Pin 10 | REF — Reference voltage input |
| Pin 11 | AIN — Analog input |
| Pin 12 | VDD — Positive supply (2.7 V to 5.5 V) |
| Pin 13 | CONVST — Conversion start input |
| Pin 14 | CS — Chip select (active low) |
| Pin 15 | RD — Read input (active low) |
| Pin 16 | DGND — Digital ground |
Typical Applications
AD7813YRZ-REEL is suitable for 6 applications: Industrial Process Control Front-End, Portable Data Acquisition / Data Logger, DSP Front-End Signal Conditioning, Motor Control Feedback Loop, Multiplexed Data Acquisition System, Audio-Bandwidth Signal Digitization.
Industrial Process Control Front-End
The AD7813YRZ-REEL's -40 °C to +105 °C industrial temperature rating, single 2.7 V–5.5 V supply, and 400 kSPS throughput make it ideal for industrial process-control front-ends. Placed on a multiplexed analog input board, the SAR ADC deterministically samples 4 mA–20 mA loop signals, thermocouple amplifier outputs, or strain-gauge bridge signals at a fixed 2.3 µs conversion time, simplifying downstream DSP integration. The wide supply range lets the same PCB accept both 3.3 V and 5 V logic, reducing SKU complexity. Best paired with the AD620 instrumentation amp for low-level sensor conditioning.
Recommended
Portable Data Acquisition / Data Logger
Low power consumption (typically ~10 mW at 5 V) and a wide 2.7 V–5.5 V supply make the AD7813YRZ-REEL well suited to battery-powered data loggers and handheld instruments. The integrated on-chip clock oscillator eliminates the external ADC timing crystal, shrinking BOM count and PCB area. The 8-/10-bit software-selectable resolution allows designers to trade SNR for sample-rate during low-power sleep cycles, extending battery life. Pair with an MSP430 or STM32 microcontroller and a CR2032 / Li-ion cell for weeks-long field deployments.
Recommended
DSP Front-End Signal Conditioning
The AD7813YRZ-REEL's deterministic SAR latency (a fixed 10-cycle conversion) and 8-bit-wide parallel interface make it a strong match for DSP front-ends where predictable sampling is critical. Place the ADC between the analog sensor stage and a DSP such as the ADSP-21xx or TI TMS320 series; the parallel bus eliminates bit-banged SPI overhead, freeing DSP cycles for FFT/filter math. The 400 kSPS ceiling cleanly covers audio-bandwidth (≤20 kHz Nyquist) and vibration-analysis applications with substantial oversampling margin.
Recommended
Motor Control Feedback Loop
In brushless DC (BLDC) and stepper motor control loops, the AD7813YRZ-REEL samples current-sense amplifier outputs with deterministic latency, supporting torque-loop bandwidths above 50 kHz. The 400 kSPS throughput handles multi-phase current sampling within a single PWM cycle, while the 2.7 V–5.5 V range accepts 3.3 V logic from modern MCUs and 5 V from legacy gate drivers. Place a 100 Ω + 1 nF anti-alias RC ahead of AIN and keep digital return currents separated from analog ground for clean current-sense measurement.
Recommended
Multiplexed Data Acquisition System
When paired with an external analog multiplexer, the AD7813YRZ-REEL becomes the core of a multi-channel data-acquisition board handling 8, 16, or more channels sequentially. The 400 kSPS throughput yields ~50 kSPS per channel at 8 channels - more than adequate for thermocouple, RTD, and process-variable monitoring. The 8-bit-wide parallel interface simplifies FIFO buffering to a host MCU. Add the ADG708 (8:1 mux) for low-leakage channel switching and the AD8610 op-amp for high-impedance input buffering.
Recommended
Audio-Bandwidth Signal Digitization
Although the AD7813YRZ-REEL is a general-purpose SAR ADC rather than an audio codec, its 400 kSPS throughput and 10-bit resolution are sufficient for audio-bandwidth (≤20 kHz Nyquist) digitization in intercom systems, voice-recognition front-ends, and acoustic monitoring. The 2.3 µs conversion time provides deterministic SAR latency - useful when phase relationships between samples matter. Place the ADC after a microphone preamp (such as the AD797 or AD8021) and an anti-alias low-pass filter at 20 kHz.
Recommended
Recommended Products Summary
Engineering reference data for AD7813YRZ-REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7813YRZ-REEL7 | AD7813YRZ | AD7813YR | AD7813YR-REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 16-SOIC (R-16) | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same |
| Resolution | 10 bit (8-/10-bit selectable) | 10 bit (8-/10-bit selectable) - same | 10 bit (8-/10-bit selectable) - same | 10 bit (8-/10-bit selectable) - same | 10 bit (8-/10-bit selectable) - same |
| Maximum Sample Rate | 400 kSPS | 400 kSPS - same | 400 kSPS - same | 400 kSPS - same | 400 kSPS - same |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V - same | 2.7 V to 5.5 V - same | 2.7 V to 5.5 V - same | 2.7 V to 5.5 V - same |
| Architecture | SAR | SAR - same | SAR - same | SAR - same | SAR - same |
| Digital Interface | 8-bit parallel | 8-bit parallel - same | 8-bit parallel - same | 8-bit parallel - same | 8-bit parallel - same |
| Packing Method | Tape & Reel, ~1000 pcs | Tape & Reel, ~500 pcs | Tube | Tube | Tape & Reel (non-Z) |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C - same | -40 °C to +105 °C - same | -40 °C to +105 °C - same | -40 °C to +105 °C - same |
Key Differentiators
- Wide single-supply range with on-chip clock oscillator (vs AD7476ARTZ-REEL7)
- 8-/10-bit software-selectable resolution (vs AD7265BCPZ-REEL)
- Parallel interface for deterministic low-latency sampling (vs AD7264BSTZ-5-RL7)
Design Notes
Separate analog and digital ground returns: tie AGND (pin 9) and DGND (pin 16) at a single point near the ADC to avoid ground-loop noise. Place the 0.1 µF VDD decoupling capacitor within 3 mm of the VDD pin, and a 10 µF bulk capacitor on the supply rail. Route parallel data bus DB0–DB7 over a continuous ground plane and avoid running them under the analog input trace.
Add a 100 Ω resistor and 1 nF capacitor anti-alias filter in front of AIN (pin 11) to limit input bandwidth to the Nyquist frequency. Keep the REF pin (pin 10) bypassed with a 10 µF tantalum in parallel with a 0.1 µF ceramic. Drive REF from a low-noise source such as the ADR01 or TL431 - noise on REF couples directly into conversion results.
Do not leave CONVST (pin 13) floating: tie it to the MCU's control GPIO or through a defined pull-up. Do not exceed VDD on the analog input AIN, as over-voltage can damage the sample-and-hold switches. Ensure CS and RD edges align with the timing diagram in the AD7813 datasheet - violations cause bus contention and corrupted readings.
Compliance Information
RoHS compliant per Analog Devices product page. Industrial screening level -40 °C to +105 °C. Not AEC-Q100 qualified - this is a general-purpose industrial ADC, not an automotive-grade part.
