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Analog Devices Inc. AD7982BRMZ
- Part No.:
- AD7982BRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7982BRMZ.pdf
- Description:
- IC ADC 18BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,157
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Product details
Overview
AD7982BRMZ from Analog Devices is an 18-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter with true differential input, ±VREF range, zero-latency architecture, and SPI-/QSPI-/MICROWIRE-compatible serial interface. It operates from a single 2.5 V supply with independent 1.8 V–5 V logic interface (VIO), delivering 98 dB SNR at 1 kHz and ±1 LSB typical INL for precision data acquisition in automated test equipment and medical instrumentation.
For engineers reviewing the AD7982BRMZ datasheet, AD7982BRMZ pinout, AD7982BRMZ application, or AD7982BRMZ equivalent, this page delivers verified technical context, exact pin functions, real-world performance metrics, and validated alternative options - all grounded in Rev. E datasheet specifications and official package documentation for the 10-lead MSOP variant.
Technical Context
The AD7982BRMZ implements a fully differential SAR architecture with internal sampling capacitor array and proprietary serial interface supporting both CS mode (3- or 4-wire) and daisy-chainable chain mode. Its CNV pin controls conversion initiation and interface selection, while SDI state at CNV rising edge determines operational mode.
It features zero-latency conversion - output data is available immediately after completion - and supports external reference voltages from 2.4 V to 5.1 V. Power consumption scales linearly with throughput: 4 mW from VDD only at 1 MSPS, dropping to 70 μW at 10 kSPS, with separate VIO supply enabling mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit, no missing codes - guarantees monotonicity and full code coverage across full temperature range. |
| Throughput Rate | 1 MSPS maximum (VIO > 2.3 V); enables real-time sampling of signals up to ~450 kHz bandwidth without aliasing. |
| INL | ±1 LSB typical, ±2 LSB max - ensures high absolute accuracy for calibration-critical applications like medical diagnostics. |
| SNR | 98 dB at fIN = 1 kHz, VREF = 5 V - delivers >16-bit effective resolution under clean signal conditions. |
| Analog Input Range | True differential ±VREF (e.g., ±5 V) - supports bipolar industrial sensor interfaces without level-shifting circuitry. |
| Power Dissipation | 7 mW total at 1 MSPS - balances high speed with low thermal load in space-constrained embedded systems. |
| Reference Voltage Range | 2.4 V to 5.1 V - allows flexible trade-off between dynamic range and noise floor via external reference selection. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and medical environments without derating. |
Pinout & Package
AD7982BRMZ is packaged in a 10-lead MSOP (RM-10) with exposed pad. The package requires standard reflow profile and GND-connected exposed pad for thermal management (θJA = 200°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REF | Analog Input | External reference voltage input (2.4–5.1 V); must be decoupled with 10 µF capacitor to GND for stable conversion accuracy. |
| 2 VDD | Power Supply | Main analog supply (2.375–2.625 V); powers core ADC and sampling circuitry - source of 4 mW dissipation at 1 MSPS. |
| 3 IN+ | Analog Input | Differential positive input; accepts voltage swing from 0 V to VREF with common-mode centered at VREF × 0.5. |
| 4 IN− | Analog Input | Differential negative input; complements IN+ for true differential acquisition and 67 dB CMRR at 450 kHz. |
| 5 GND | Power Ground | Analog ground reference for VDD, REF, and IN+/IN−; must be star-connected to minimize noise coupling. |
| 6 CNV | Digital Input | Convert trigger and interface mode selector; rising edge initiates sampling and determines CS vs. chain mode based on SDI state. |
| 7 SDO | Digital Output | Serial data output (18-bit two's complement); synchronized to SCK falling edge with 3 ns hold time guarantee. |
| 8 SCK | Digital Input | Serial clock input; supports up to 100 MHz (VIO > 4.5 V) for fast readout in CS or chain modes. |
| 9 SDI | Digital Input | Serial data input and mode control; low at CNV rising edge enables daisy-chain mode; high enables CS mode with busy indicator. |
| 10 VIO | Power Supply | Digital I/O supply (1.71–5.5 V); sets logic thresholds independently - enables direct interfacing with 1.8 V, 2.5 V, 3 V, or 5 V controllers. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Conversion result available immediately after tCONV (≤710 ns); eliminates pipeline delay for deterministic real-time control loops. |
| Proprietary SPI-compatible interface | Supports daisy-chaining multiple AD7982BRMZ units on one 3-wire bus - reduces GPIO count and PCB routing complexity in multi-channel systems. |
| True differential input with ±VREF range | Rejects common-mode noise up to 67 dB at 450 kHz while accepting bipolar inputs (e.g., ±5 V) without external amplifiers or level shifters. |
| Low power scaling with throughput | Drops from 7 mW at 1 MSPS to 70 µW at 10 kSPS - enables adaptive power management in battery-powered portable instruments. |
| Wide VIO compatibility | Operates with 1.8 V, 2.5 V, 3 V, or 5 V host logic - eliminates level translators when interfacing with FPGAs, microcontrollers, or DSPs across voltage domains. |
Applications
| Automated Test Equipment (ATE) | Data Acquisition Systems |
|---|---|
Use Scenario: High-speed functional testing of mixed-signal ICs requiring precise DC and AC parameter measurement. IC Role / Device Role / Timing Role: Primary digitizer capturing stimulus-response waveforms at up to 1 MSPS with 18-bit fidelity and zero latency. Use Value: Enables sub-LSB repeatability and 98 dB SNR to validate device specs against JEDEC standards without post-processing correction. |
Use Scenario: Modular rack-mounted DAQ modules acquiring synchronized analog channels from industrial sensors (RTDs, strain gauges, accelerometers). IC Role / Device Role / Timing Role: Precision SAR ADC front-end with daisy-chain capability for multi-channel expansion using shared SCK/SDO lines. Use Value: Reduces interconnect count and timing skew across 8+ channels while maintaining ±1 LSB INL over −40°C to +85°C. |
| Medical Instruments | Machine Automation |
Use Scenario: Portable ECG and patient monitoring systems requiring low-power, high-SNR acquisition of microvolt-level bio-signals. IC Role / Device Role / Timing Role: Low-noise analog front-end digitizer with 99 dB dynamic range and 70 µW standby power at 10 kSPS. Use Value: Extends battery life while preserving diagnostic-grade signal integrity - meets IEC 60601-2-27 requirements for clinical waveform fidelity. |
Use Scenario: Closed-loop servo drive feedback where position/velocity sensing demands deterministic sampling with minimal jitter. IC Role / Device Role / Timing Role: Real-time current/voltage sensing ADC with aperture delay of 2 ns and tCYC = 1000 ns for tight control loop timing. Use Value: Supports 100 kHz PWM switching frequencies with synchronous sampling, reducing phase error in field-oriented control algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7989-5BRMZ | 18-bit, 500 kSPS, same 10-lead MSOP package; lower throughput but improved THD (−122 dB) and SFDR (122 dB) at 10 kHz. | Better suited for narrowband spectral analysis where SNR beyond 100 kHz matters more than raw speed. | Select AD7989-5BRMZ when system sampling rate ≤500 kSPS and ultra-low distortion at higher frequencies is prioritized over 1 MSPS capability. |
| AD4003BRMZ | 18-bit, 1 MSPS, but uses pseudo-differential input (IN+ to GND); lacks true differential input and CMRR specification. | Requires external driver for differential sensors; not suitable for high-common-mode-noise environments without added components. | Choose AD4003BRMZ only if single-ended sensor interface suffices and board area savings from smaller 10-lead LFCSP (3 mm × 3 mm) outweigh loss of differential rejection. |
Compared with AD7982BRMZ, AD7989-5BRMZ trades speed for enhanced harmonic suppression, while AD4003BRMZ sacrifices differential input integrity for compact packaging - neither offers pin-to-pin compatibility or identical electrical behavior, making AD7982BRMZ the sole choice for true differential, 1 MSPS, 18-bit acquisition in noise-sensitive industrial and medical designs.
Availability
AD7982BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, and machine automation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7982BRMZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers and manufacturing facilities worldwide.
The AD7982BRMZ belongs to Analog Devices' precision SAR ADC product line, engineered specifically for applications demanding 18-bit resolution, low power, and robust serial interfacing in industrial, medical, and test equipment environments.
FAQ
What is the maximum sampling rate supported by the AD7982BRMZ?
The AD7982BRMZ supports a maximum throughput rate of 1 MSPS when VIO exceeds 2.3 V. At lower VIO levels (≤2.3 V), the maximum rate drops to 800 kSPS due to timing constraints on SCK period and data readout. This is explicitly specified in Tables 4 and 5 of the Rev. E datasheet, with tCYC = 1000 ns defining the minimum cycle time at full speed.
Does the AD7982BRMZ require an external reference voltage?
Yes, the AD7982BRMZ requires an external reference voltage applied to the REF pin. The device accepts VREF from 2.4 V to 5.1 V, and its analog input range scales directly as ±VREF. No internal reference is provided - reference stability and noise directly impact INL, SNR, and overall measurement accuracy of the AD7982BRMZ.
Can the AD7982BRMZ interface directly with a 1.8 V microcontroller?
Yes, the AD7982BRMZ supports 1.8 V logic through its dedicated VIO supply pin. When VIO = 1.8 V, digital inputs (CNV, SDI, SCK) accept VIH ≥ 1.62 V and VIL ≤ 0.18 V, and digital output SDO drives VOH ≥ 1.5 V and VOL ≤ 0.4 V - meeting standard 1.8 V CMOS thresholds without level translation circuitry.
What package variants are available for the AD7982BRMZ?
The AD7982BRMZ is exclusively offered in the 10-lead MSOP package (RM-10), as confirmed by the Ordering Guide in the Rev. E datasheet and Pin Configuration Figure 3. While the base AD7982 part number also appears in 10-lead LFCSP (CP-10-9), the "BRMZ" suffix specifically denotes the MSOP variant with exposed pad, θJA = 200°C/W, and standard tape-and-reel packaging.
How does the daisy-chain mode work on the AD7982BRMZ?
In daisy-chain mode, the AD7982BRMZ uses SDI as both mode selector and data input: when SDI is low at the CNV rising edge, the device enters chain mode. Conversion results from multiple AD7982BRMZ units are concatenated onto a single SDO line, with each device delaying its output by 18 SCK cycles - enabling synchronized multi-channel acquisition using only three wires (CNV, SCK, SDO).
AD7982BRMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.375V ~ 2.625V
- Voltage - Supply, Digital:
- 2.375V ~ 2.625V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7982BRMZ FAQ
1.How can I place an order for AD7982BRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7982BRMZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7982BRMZ reliable?
The price and inventory of AD7982BRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7982BRMZ is usually 5 days.
3.What payment methods are accepted for AD7982BRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7982BRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7982BRMZ?
AD7982BRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7982BRMZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7982BRMZ?
For technical support, including AD7982BRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7982BRMZ requirements.
6.How does Aetrix verify that AD7982BRMZ is sourced from the original manufacturer or authorized distributors?
All AD7982BRMZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7982BRMZ meets industry standards.
7.What is the process for return or replacement of AD7982BRMZ?
All AD7982BRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7982BRMZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7982BRMZ part is unused and in its original packaging.
Return procedure for AD7982BRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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