My Inquiry
My Account
Analog Devices Inc. AD7682BCPZRL7
- Part No.:
- AD7682BCPZRL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7682BCPZRL7.pdf
- Description:
- IC ADC 16BIT SAR 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,517
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7682BCPZRL7 from Analog Devices is a 4-channel, 16-bit, charge redistribution SAR analog-to-digital converter with no missing codes, 250 kSPS throughput, ±0.4 LSB typical INL, and integrated 2.5 V/4.096 V selectable reference - designed for multichannel system monitoring in battery-powered medical instrumentation such as ECG/EKG front-ends.
For engineers reviewing the AD7682BCPZRL7 datasheet, AD7682BCPZRL7 pinout, AD7682BCPZRL7 application, or AD7682BCPZRL7 equivalent, key selection considerations include its single-supply 2.3 V–5.5 V operation, SPI/MICROWIRE/QSPI-compatible serial interface, 4-channel multiplexer with unipolar/differential/pseudobipolar input configuration, internal temperature sensor, and 20-lead 4 mm × 4 mm LFCSP package.
Technical Context
The AD7682BCPZRL7 implements a true 16-bit successive approximation register (SAR) architecture with zero pipeline delay, enabling deterministic conversion timing and immediate result availability after CNV rising edge (tCONV = 2.2 µs at VDD ≥ 4.5 V). It integrates a low-crosstalk 4-channel analog multiplexer supporting configurable input modes - unipolar single-ended, differential (GND-sense), and pseudobipolar - all referenced to COM.
Its on-chip reference subsystem supports three configurations: internal 2.5 V or 4.096 V (with ±10 ppm/°C drift), external buffered reference up to 4.096 V, or direct external reference up to VDD. The device uses separate VDD (2.3–5.5 V) and VIO (1.8–VDD) supplies, enabling interoperability with 1.8 V, 2.5 V, 3 V, or 5 V logic hosts while maintaining full 16-bit accuracy across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision measurement systems. |
| Throughput | 250 kSPS at VDD ≥ 4.5 V - supports real-time sampling of ECG waveforms (≤ 500 Hz bandwidth) with oversampling headroom. |
| INL | ±0.4 LSB typical (±1.5 LSB max) - enables ≤ 0.0023% FSR absolute accuracy without calibration in industrial sensor interfaces. |
| SINAD | 92.5 dB at 20 kHz (VREF = 5 V) - delivers >15.3 effective bits for high-fidelity signal capture in seismic or audio-grade acquisition. |
| Analog Input Range | 0 V to VREF (unipolar), −VREF/2 to +VREF/2 (bipolar) - supports direct connection to transducer outputs without external level-shifting. |
| Power Dissipation | 3.5 mW at 2.5 V/200 kSPS - enables <10 µA average current draw in battery-operated portable diagnostics. |
| Standby Current | 50 nA - allows rapid wake-from-sleep (<1.8 µs acquisition time) for duty-cycled IoT sensor nodes. |
Pinout & Package
AD7682BCPZRL7 is housed in a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed pad (EPAD) for thermal and mechanical reliability. Pinout conforms to Figure 4 and Table 8 of Rev. K datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 20) | Core analog power supply | 2.3–5.5 V supply; minimum 3.0 V required when internal 2.5 V reference enabled; decoupled with 10 µF + 100 nF. |
| REF (Pin 2) | Reference input/output | Outputs selectable 2.5 V or 4.096 V internal reference; accepts buffered external reference up to 4.096 V or direct reference up to VDD. |
| REFIN (Pin 3) | Internal reference buffer input | Provides unbuffered bandgap output (2.5 V or 4.096 V) requiring 0.1 µF decoupling; or accepts external source for buffered REF output. |
| GND (Pins 4, 5) | Analog ground return | Dual GND pins minimize ground bounce; must connect to low-impedance system ground plane adjacent to EPAD. |
| IN0–IN3 (Pins 16, 18, 9, 6) | Analog input channels | Four single-ended or differential inputs; each configurable via sequencer; COM (Pin 10) sets common-mode reference point (0 V or VREF/2). |
| CNV (Pin 11) | Conversion trigger | Rising edge initiates conversion; held low during conversion enables busy indicator on SDO. |
| DIN/SCK/SDO (Pins 12, 13, 14) | SPI-compatible serial interface | MSB-first, 16-bit serial I/O; compatible with SPI, MICROWIRE, QSPI, DSP; VIO (Pin 15) sets logic voltage (1.8–VDD). |
| VIO (Pin 15) | Digital I/O supply | Independent 1.8–VDD supply for digital interface - isolates logic noise from analog section and enables mixed-voltage host interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated channel sequencer | Automatically cycles through IN0–IN3 in user-defined order without host intervention - reduces firmware overhead in multi-sensor monitoring. |
| Selectable 1-pole filter | Configurable digital filter suppresses aliasing from out-of-band noise before conversion - eliminates need for external anti-aliasing RC networks. |
| Internal temperature sensor | Dedicated TEMP channel (connected internally to multiplexer) provides ±1°C accuracy over −40°C to +85°C - enables self-calibration and thermal compensation. |
| No pipeline delay | SAR architecture delivers conversion result immediately post-CNV edge (no latency uncertainty) - critical for closed-loop control timing predictability. |
| Low crosstalk multiplexer | −125 dB channel-to-channel crosstalk at 100 kHz - preserves signal integrity when measuring high-gain, high-impedance biopotential sources simultaneously. |
Applications
| ECG/EKG Front-End | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Simultaneous acquisition of limb leads (RA, LA, LL) and chest leads (V1–V6) in portable cardiac monitors. IC Role / Device Role / Timing Role: 4-channel SAR ADC digitizes analog bio-potential signals with 16-bit resolution and <1.8 µs acquisition time per channel. Use Value: Enables detection of microvolt-level ST-segment deviations without external amplification or calibration, leveraging internal reference stability and low INL. |
Use Scenario: Long-term environmental sensing (temperature, humidity, pressure) in solar-powered remote telemetry units. IC Role / Device Role / Timing Role: Low-power ADC samples multiple sensors sequentially using built-in sequencer and enters 50 nA standby between conversions. Use Value: Achieves >1-year battery life on coin cell by minimizing active time and eliminating external reference ICs or power management circuitry. |
| Industrial Process Control | Seismic Sensor Node |
|
Use Scenario: Monitoring 4-channel 4–20 mA loop transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Unipolar 0–5 V input range directly interfaces with op-amp conditioned current-loop outputs; internal 4.096 V reference ensures 1 LSB = 62.5 µV resolution. Use Value: Eliminates external precision reference and reduces BOM count while meeting IEC 61000-4-5 surge immunity requirements via robust LFCSP package. |
Use Scenario: High-dynamic-range vibration sensing in geophone arrays deployed for oil/gas exploration. IC Role / Device Role / Timing Role: 92.5 dB SINAD and 93.8 dB dynamic range capture weak seismic reflections amid high-amplitude ambient noise. Use Value: Delivers >15.3 ENOB at 20 kHz - sufficient for 24-bit-equivalent post-processing without oversampling hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7689BCPZRL7 | 8-channel variant with identical 16-bit SAR core, same package, but adds IN4–IN7 and extended temp option (AD7689C to +125°C). | Required when >4 analog inputs must be sampled without external mux; not drop-in - requires PCB routing changes for additional INx pins. | Select AD7689BCPZRL7 only if channel count expansion is needed; AD7682BCPZRL7 remains optimal for 4-input cost- and space-constrained designs. |
| AD7949BCPZRL7 | 14-bit, 8-channel SAR ADC with 500 kSPS throughput, lower power (2.5 mW at 5 V), but no internal reference or temperature sensor. | Suitable for higher-speed, lower-resolution applications like motor phase current sensing where 14-bit linearity suffices. | Choose AD7949BCPZRL7 when speed > resolution priority; AD7682BCPZRL7 preferred for precision metrology where 16-bit monotonicity and integrated reference are mandatory. |
Compared with AD7689BCPZRL7, AD7682BCPZRL7 offers lower channel count but reduced pin count and smaller footprint - ideal for compact 4-sensor systems. Versus AD7949BCPZRL7, it trades 14-bit speed for guaranteed 16-bit linearity, internal reference, and on-chip temperature sensing - critical for calibrated portable instrumentation.
Availability
AD7682BCPZRL7 is available at Aetrix Electronics and suitable for multichannel system monitoring, battery-powered medical devices, and industrial process control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7682BCPZRL7 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7682 is part of Analog Devices' PulSAR® family of precision SAR ADCs, engineered for low-power, multichannel data acquisition in portable and embedded systems where accuracy, small size, and integrated features reduce system complexity.
FAQ
What is the maximum sample rate of the AD7682BCPZRL7?
The AD7682BCPZRL7 achieves 250 kSPS maximum throughput when VDD is 4.5 V to 5.5 V. At lower VDD (2.3 V to 4.5 V), the maximum rate drops to 200 kSPS. This is specified in Table 2 of the Rev. K datasheet and applies to full-bandwidth mode configured via the CFG register.
Does the AD7682BCPZRL7 require an external reference voltage?
No - the AD7682BCPZRL7 includes an internal selectable 2.5 V or 4.096 V reference with ±10 ppm/°C drift. External references are optional and supported via REF or REFIN pins, but the internal reference eliminates BOM cost and board area for most precision applications.
What package type is used for the AD7682BCPZRL7?
The AD7682BCPZRL7 uses a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed pad (EPAD), as confirmed in the Ordering Guide and Outline Dimensions sections of the Rev. K datasheet. This package supports high thermal performance and compact layout.
Can the AD7682BCPZRL7 operate from a 1.8 V digital interface supply?
Yes - the AD7682BCPZRL7 supports VIO from 1.8 V to VDD, allowing direct interfacing with 1.8 V microcontrollers or FPGAs. Its digital inputs (DIN, CNV, SCK) accept 0.7×VIO high threshold and its SDO output drives to VIO − 0.3 V, ensuring reliable communication at 1.8 V logic levels.
How does the internal temperature sensor function in the AD7682BCPZRL7?
The AD7682BCPZRL7 integrates a factory-calibrated temperature sensor connected to a dedicated multiplexer input (TEMP channel). Its output is 283 mV at 25°C with 1 mV/°C sensitivity, enabling direct readout via any ADC channel - no external components required for thermal monitoring or compensation.
AD7682BCPZRL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 20-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 4
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.3V ~ 5.5V
- Voltage - Supply, Digital:
- 2.3V ~ 5.5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7682BCPZRL7 FAQ
1.How can I place an order for AD7682BCPZRL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7682BCPZRL7 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 AD7682BCPZRL7 reliable?
The price and inventory of AD7682BCPZRL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7682BCPZRL7 is usually 5 days.
3.What payment methods are accepted for AD7682BCPZRL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7682BCPZRL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7682BCPZRL7?
AD7682BCPZRL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7682BCPZRL7 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 AD7682BCPZRL7?
For technical support, including AD7682BCPZRL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7682BCPZRL7 requirements.
6.How does Aetrix verify that AD7682BCPZRL7 is sourced from the original manufacturer or authorized distributors?
All AD7682BCPZRL7 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 AD7682BCPZRL7 meets industry standards.
7.What is the process for return or replacement of AD7682BCPZRL7?
All AD7682BCPZRL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7682BCPZRL7, 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 AD7682BCPZRL7 part is unused and in its original packaging.
Return procedure for AD7682BCPZRL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7682BCPZRL7 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
