AD7983BCPZ-R2 - 16-Bit 1.33 MSPS PulSAR ADC | Analog Devices
MPN: AD7983BCPZ-R2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.4 | $104.00 |
| 100 | $9.3 | $930.00 |
| 500 | $8.2 | $4,100.00 |
| 1,000 | $7.1 | $7,100.00 |
| 2,500 | $6.35 | $15,875.00 |
AD7983BCPZ-R2 Overview
A successive-approximation register ADC is a precision data-conversion architecture that uses a binary-search algorithm against an internal DAC to resolve each analog sample into a digital value, achieving an excellent balance of speed, accuracy, and power for medium-bandwidth measurement channels. In the broader taxonomy, the AD7983 belongs to the SAR ADC family within precision data converters, which sits alongside delta-sigma and pipeline converters; delta-sigma favors highest resolution at low bandwidth, while SAR excels at sub-MHz to multi-MHz signals with low latency, making SAR the standard choice for instrumentation, motor control, and multi-channel multiplexed data-acquisition front ends.
Key features include a 0 V to REF pseudo-differential input range with ground sense (IN-), an external reference voltage (REF), a hardware CNV (convert) input that initiates acquisition on the rising edge, and an SCK-driven serial data output. The LFCSP-WD (3x3) footprint with a wettable flank enables optical inspection on the PCB. The AD7983 is pin-for-pin compatible with the 18-bit AD7982 and the 16-bit AD7689/AD7699 family, giving designers an upgrade/downgrade path on a single PCB layout.
Typical applications include industrial process control loop measurement, battery monitoring and management systems (BMS), precision instrumentation and data acquisition modules, motor control feedback via shunt current sensing, and portable medical devices. The 1.33 MSPS throughput and low power make it particularly attractive for battery-powered multi-channel scanning systems where acquisition speed and accuracy must coexist with strict thermal and energy budgets.
When designing with the AD7983BCPZ-R2, place the REF decoupling capacitor (typically 10 uF ceramic in parallel with a 0.1 uF) directly at the REF pin, and use a low-impedance ground pour tied to the exposed pad to minimize reference noise coupling. The serial interface timing budget should be respected per the datasheet timing diagram; SCK frequencies up to 50 MHz are supported, allowing easy FPGA and modern MCU host interfacing.
Drop-in alternatives for AD7983BCPZ-R2 — 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 AD7983BCPZ-R2 (same form factor and footprint) — differing in Package, Architecture, Resolution, Operating Temperature, Supply Voltage (VDD).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7983BCPZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7982BCPZ-R2
✅ Drop-In📋 Reference alternative (not in catalog)
AD7982BCPZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7689ACPZ-R2
✅ Drop-In📋 Reference alternative (not in catalog)
AD7983BCPZ-R2 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Architecture | Successive Approximation Register (SAR) |
| Sample Rate (Throughput) | 1.33 MSPS |
| Input Channels | 1 (single-ended/pseudo-differential IN+/IN-) |
| Input Voltage Range | 0 V to VREF |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Reference Voltage (REF) | External, 2.5 V to 5.5 V |
| Power Dissipation | 10.5 mW typical @ 1.33 MSPS, VDD = 5 V |
| INL (Integral Nonlinearity) | ±0.6 LSB typical, ±1.0 LSB maximum |
| SINAD | 91 dB typical |
| Missing Codes | None (16-bit guaranteed) |
| Digital Logic Compatibility | 1.8 V to 5 V |
| Serial Interface | SPI-compatible (SCK, SDO, CNV) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package Type | 10-LFCSP-WD (3x3 mm) with exposed pad |
| Pin/Package Compatibility | Pin-for-pin compatible with AD7982 (18-bit) and AD7689/AD7699 family |
| RoHS Status | RoHS Compliant |
AD7983BCPZ-R2 Pin Configuration
| Pin 1 | REF — Reference voltage input (external, 2.5 V to 5.5 V) |
| Pin 2 | VDD — Power supply input (2.5 V to 5.5 V) |
| Pin 3 | GND — Ground reference for analog and digital sections |
| Pin 4 | IN+ — Analog input positive (0 V to VREF range) |
| Pin 5 | IN- — Analog input negative / ground sense |
| Pin 6 | GND — Ground (additional ground connection) |
| Pin 7 | SDO — Serial data output (SPI) |
| Pin 8 | SCK — Serial clock input (SPI) |
| Pin 9 | CNV — Convert input, rising edge starts acquisition (pins 1 and 9 at top-left position) |
| Pin 10 | GND — Ground (additional ground connection) |
Typical Applications
AD7983BCPZ-R2 is suitable for 6 applications: Industrial Process Control Loop Measurement, Battery Monitoring (Cell Voltage and Current Sense), Precision Data Acquisition (DAQ) Modules, Motor Control Current Sensing (FOC Feedback), Portable Medical Devices (Patient Monitoring), Programmable Logic Controller (PLC) Analog Input Modules.
Industrial Process Control Loop Measurement
The AD7983BCPZ-R2's 1.33 MSPS throughput and 16-bit guaranteed no-missing-codes performance make it ideal for industrial process control loop measurement, where 4-20 mA sensor signals must be digitized with high accuracy and low latency. With ±0.6 LSB typical INL and 91 dB SINAD, the part preserves the dynamic range needed for closed-loop PID control of temperature, pressure, and flow variables, while its 10.5 mW typical dissipation keeps thermal budgets under control in DIN-rail mounted analog input modules. The 0 V to VREF input span directly accepts sensor outputs scaled to a 2.5 V or 5 V reference. Place the REF decoupling network (10 uF + 0.1 uF) at the pin to reject switching noise from upstream digital isolators in field-mounted designs.
Recommended
Battery Monitoring (Cell Voltage and Current Sense)
The AD7983BCPZ-R2 suits battery management system (BMS) front-end digitizers where cell voltage and shunt current must be sampled at high speed to support cell balancing and state-of-charge estimation. Its 1.33 MSPS single-channel throughput allows oversampling of multiplexed cell voltages to extract thermal drift and K-factors in real time, while the low 10.5 mW dissipation extends operating time in portable battery-powered equipment. The pseudo-differential IN+/IN- inputs accommodate bipolar shunt signals around a common-mode reference point, simplifying the analog front-end for current sensing. Use an external MUX analog multiplexer in front of the ADC for multi-cell scanning with sub-millisecond channel-to-channel settling.
Recommended
Precision Data Acquisition (DAQ) Modules
In precision data acquisition modules used in test and measurement, the AD7983BCPZ-R2 provides the 16-bit dynamic range needed for capturing transient signals at sample rates up to 1.33 MSPS, while the SPI-compatible serial port allows easy interfacing to FPGAs or modern Cortex-M microcontrollers. With 91 dB SINAD and ±0.6 LSB typical INL, it preserves signal fidelity for vibration, acoustic emission, or general-condition ML instrumentation reports. The 10-LFCSP-WD (3x3) footprint enables high channel density on small PCBs for multi-channel DAQ cards. Keep SCK rates below 50 MHz and observe the tCONV acquisition timing budget for full performance.
Recommended
Motor Control Current Sensing (FOC Feedback)
Field-oriented control (FOC) of three-phase motors requires high-bandwidth current sensing on each phase, and the AD7983BCPZ-R2's 1.33 MSPS throughput captures both the fundamental PWM switching ripple and the regulation control loop bandwidth of typical 10-50 kHz FOC implementations. Its pseudo-differential input stage accepts low-side or inline shunt current sensing signals at 0-VREF spans, while the 1.8 V to 5 V logic compatibility directly interfaces with 3.3 V DSP and MCU FOC controllers. The exposed-pad coverage on the bottom of the package dissipates internal heat and improves reference noise immunity in high-dV/dt motor drive environments.
Recommended
Portable Medical Devices (Patient Monitoring)
The AD7983BCPZ-R2's low 10.5 mW dissipation at 1.33 MSPS is well-suited to portable patient monitoring equipment (ECG, SpO2, body temperature) where battery life and patient safety are paramount. The 16-bit resolution captures the small mV-scale biopotential signals from ECG leads with adequate dynamic range, while the pseudo-differential input provides common-mode rejection of 50/60 Hz mains interference when paired with a precision front-end amplifier. The 10-LFCSP-WD (3x3) package and small external component count simplify wearable form-factor PCBs for compact medical designs.
Recommended
Programmable Logic Controller (PLC) Analog Input Modules
In PLC analog input modules for factory automation, the AD7983BCPZ-R2 digitizes 0-10 V or 4-20 mA conditioned signals at 1.33 MSPS per channel with 16-bit no-missing-codes accuracy - supporting eight or more multiplexed channels at sub-millisecond latency. The 91 dB SINAD enables accurate measurement of low-level transducer signals after front-end scaling, and the SPI interface allows efficient FPGA or ASIC-based channel management. Industrial temperature range (-40 C to +85 C) and RoHS compliance meet factory automation certification requirements without needing additional screening.
Recommended
Recommended Products Summary
Engineering reference data for AD7983BCPZ-R2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7983BCPZ-RL7 | AD7982BCPZ-R2 | AD7982BCPZ-RL7 | AD7689ACPZ-R2 | ADS8860IDR |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Package | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) | MSOP-10 (different land pattern) |
| Resolution | 16 bits | 16 bits | 18 bits | 18 bits | 16 bits | 16 bits |
| Sample Rate | 1.33 MSPS | 1.33 MSPS | 1.33 MSPS | 1.33 MSPS | ~250 kSPS | 1.0 MSPS |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.7 V to 3.6 V (AVDD/DVDD) |
| Power Dissipation | 10.5 mW @ 1.33 MSPS | 10.5 mW @ 1.33 MSPS | 10.5 mW @ 1.33 MSPS | 10.5 mW @ 1.33 MSPS | ~5 mW @ 250 kSPS | 5.5 mW @ 1 MSPS |
| INL (typical) | ±0.6 LSB | ±0.6 LSB | ±0.6 LSB (at 18-bit) | ±0.6 LSB (at 18-bit) | ±0.5 LSB | ±1.0 LSB |
| Logic Compatibility | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 3.3 V |
| Pin Compatibility | Reference (AD7982 family) | Pin-for-pin identical | Pin-for-pin identical (per datasheet) | Pin-for-pin identical | Pin-for-pin identical (per datasheet) | Different pinout (MSOP-10) |
Key Differentiators
- Pin-for-pin compatible with 18-bit AD7982 for resolution upgrade path (vs AD7982BCPZ-R2)
- Higher throughput than AD7689 family at same pinout (vs AD7689ACPZ-R2)
- Lower power at full throughput than ADS8860IDR (vs ADS8860IDR)
Design Notes
The AD7983BCPZ-R2 requires a clean low-noise VDD supply; place a 10 uF ceramic capacitor in parallel with a 0.1 uF X7R decoupling capacitor directly at the VDD pin to suppress switching noise from upstream DC-DC converters. For optimal reference noise immunity, the REF pin requires a 10 uF + 0.1 uF ceramic capacitor pair with traces kept short to minimize PCB trace inductance. Avoid sharing REF ground return with high-current digital return paths.
Route the SPI digital traces (CNV, SCK, SDO) as short microstrip or stripline traces with controlled impedance, kept away from the analog input traces to prevent digital-noise coupling into the sensitive IN+/IN- inputs. The exposed thermal pad (EP) on the underside MUST be soldered to a continuous low-impedance ground pour with multiple thermal vias to the inner ground plane for both thermal dissipation and reference noise rejection.
The analog input IN+ has a switched-capacitor sample-and-hold front-end that draws transient currents; place an op-amp buffer (e.g. AD8231, AD8418) between the input source and the ADC IN+ pin to provide adequate drive strength. Use a 50 ohm ferrite bead or small RC anti-aliasing filter on IN+ before the buffer to limit broadband noise. Respect the tCONV acquisition time of approximately 220 ns per the datasheet timing diagram; SCK frequencies above 50 MHz risk violating the acquisition settling budget.
Do not leave the exposed pad unsoldered - this degrades thermal performance and increases reference noise coupling. Do not apply input voltages outside the 0 V to VREF range on IN+; overdriving beyond VREF or below GND risks latch-up and permanent damage. Do not use VDD as the reference voltage (REF) unless the application can tolerate reference ripple from digital switching - for precision use an external low-noise reference like the ADR4550 or ADR435 with separate bypass capacitors.
Compliance Information
RoHS compliant per DigiKey catalog data. Industrial temperature grade (-40 C to +85 C); not AEC-Q100 qualified - for automotive applications consider AD7983 (special-order automotive grade) or AEC-Q100 listed alternatives.
