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Analog Devices Inc. AD7671ACP
- Part No.:
- AD7671ACP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7671ACP.pdf
- Description:
- IC ADC 16BIT CMOS 1MSPS 48-LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,581
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Product details
Overview
AD7671ACP from Analog Devices is a 16-bit, 1 MSPS charge redistribution SAR analog-to-digital converter operating from a single 5 V supply. It delivers ±2.5 LSB max INL, 90 dB SNR at 250 kHz, and supports bipolar (±10 V, ±5 V, ±2.5 V) and unipolar (0–10 V, 0–5 V, 0–2.5 V) input ranges. It serves as the high-speed precision front-end in data acquisition systems requiring no pipeline delay.
For engineers reviewing the AD7671ACP datasheet, AD7671ACP pinout, AD7671ACP application, or AD7671ACP equivalent, key selection considerations include Warp/Normal/Impulse mode trade-offs, 48-lead LQFP vs. LFCSP package compatibility, serial (SPI/QSPI/MICROWIRE) or parallel (8-/16-bit) interface configuration, and factory-calibrated DC/AC performance across –40°C to +85°C.
Technical Context
The AD7671ACP implements a charge redistribution DAC architecture with internal resistor-scaling network enabling six programmable analog input ranges via external pin strapping (IND/INC/INB/INA). Its conversion core uses a fully calibrated successive approximation register with on-chip track-and-hold, delivering zero pipeline latency and guaranteed no missing codes.
It supports three hardware-selectable operating modes: Warp Mode (1 MSPS, requires ≤1 ms inter-conversion interval for full accuracy), Normal Mode (800 kSPS, no timing constraints), and Impulse Mode (666 kSPS, power scaled linearly with throughput). Interface flexibility includes 16-bit parallel output or 2-wire serial (master/slave, configurable clock polarity/phase, SYNC framing).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - ensures monotonicity and deterministic code mapping for precision measurement. |
| Throughput Rate | 1 MSPS in Warp Mode - enables real-time capture of signals up to 500 kHz Nyquist bandwidth. |
| INL | ±2.5 LSB max - translates to 0.0038% of full scale, supporting <12-bit effective linearity in closed-loop control. |
| S/(N+D) | 90 dB typical at 250 kHz - allows accurate digitization of low-level signals embedded in wideband noise. |
| Analog Input Ranges | Bipolar: ±10 V, ±5 V, ±2.5 V; Unipolar: 0–10 V, 0–5 V, 0–2.5 V - selectable via resistor network configuration, not software. |
| Power Dissipation | 112 mW typical at 1 MSPS; 15 mW at 100 SPS in Impulse Mode - enables battery-powered portable instrumentation. |
| Interface | Parallel (8/16-bit) or SPI/QSPI/MICROWIRE-compatible serial - supports direct connection to FPGA, DSP, or microcontroller without level-shifting. |
Pinout & Package
AD7671ACP is available in a 48-lead LQFP (ST-48) package with exposed paddle connected to AGND. Pin functions are electrically validated per Analog Devices' official AD7671 datasheet Rev. C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pins 1, 36) | Analog Power Ground | Reference return for AVDD and analog input scaling network; must be isolated from DGND/OGND to minimize noise coupling. |
| CNVST (Pin 35) | Conversion Start Input | Falling-edge-triggered sample-and-hold control; initiates conversion and defines aperture point with 2 ns delay. |
| BUSY (Pin 29) | Conversion Status Output | Active-HIGH signal indicating conversion in progress; falling edge marks data-ready timing for synchronous read. |
| D[15:0] (Pins 9–12, 13, 14, 15, 16, 21, 22, 23, 24, 25–28) | Data Bus I/O | Configurable as 16-bit parallel output or multiplexed serial interface pins (SDOUT, SCLK, SYNC, etc.) based on SER/PAR state. |
| WARP / IMPULSE (Pins 6, 7) | Mode Selection Inputs | Hardware-configured operating mode: Warp (1 MSPS), Normal (800 kSPS), or Impulse (666 kSPS, power-proportional). |
| REF / REFGND (Pins 37, 38) | External Reference Interface | Accepts 2.3 V to (AVDD – 1.85 V) reference voltage; REFGND must be tied directly to AGND for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Calibrated DC/AC Performance | Guaranteed INL, SNR, THD, and SFDR across temperature without user calibration - reduces system-level test overhead. |
| No Pipeline Delay Architecture | Successive approximation core delivers immediate result availability after BUSY deassertion - essential for time-critical closed-loop feedback. |
| Three Hardware-Selectable Power Modes | Warp (max speed), Normal (asynchronous timing), Impulse (throughput-scaled power) - enables dynamic power/performance adaptation. |
| Flexible Analog Input Scaling | Resistor-network-based input range selection (±10 V to 0–2.5 V) via four dedicated analog input pins - eliminates need for external gain stages. |
| Single 5 V Supply Operation | AVDD = DVDD = 5 V; OVDD supports 2.7–5.25 V logic - simplifies power design and enables direct interfacing with 3 V or 5 V host systems. |
Applications
| Data Acquisition Systems | Communications Test Equipment |
|---|---|
Use Scenario: High-channel-count industrial DAQ with multiplexed sensor inputs requiring synchronized sampling and minimal latency. IC Role / Device Role / Timing Role: Precision front-end ADC providing 16-bit resolution and zero-latency conversion for real-time waveform capture. Use Value: No missing codes and ±2.5 LSB INL ensure accurate representation of transients and low-amplitude signals across full dynamic range. | Use Scenario: RF signal analyzer capturing baseband I/Q waveforms at intermediate frequencies up to 250 kHz. IC Role / Device Role / Timing Role: High-SNR digitizer enabling clean spectral analysis with 90 dB S/(N+D) at 250 kHz input. Use Value: 100 dB SFDR prevents harmonic artifacts from masking adjacent low-level signals during modulation analysis. |
| Medical Imaging Front-Ends | Process Control Loop Sensors |
Use Scenario: Ultrasound beamformer receiving analog echo returns with precise amplitude and timing fidelity. IC Role / Device Role / Timing Role: Low-jitter (5 ps rms) SAR ADC capturing time-of-flight data with sub-nanosecond aperture uncertainty. Use Value: 2 ns aperture delay and 250 ns transient response enable accurate depth resolution in time-domain imaging. | Use Scenario: Programmable logic controller monitoring analog process variables (pressure, temperature, flow) with high long-term stability. IC Role / Device Role / Timing Role: Factory-calibrated ADC eliminating field recalibration needs while maintaining ±0.38% full-scale error over –40°C to +85°C. Use Value: Bipolar zero error ≤ ±45 LSB (±5 V range) ensures accurate offset tracking in closed-loop PID execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7665ASTZ | 16-bit, 250 kSPS, pin-compatible but lower throughput; lacks Impulse mode and Warp Mode; 80 dB SNR @ 100 kHz. | Targeted at cost-sensitive, lower-bandwidth DAQ where 1 MSPS is unnecessary. | Select AD7665ASTZ only when maximum throughput ≤250 kSPS suffices and board layout reuse is critical. |
| AD7679ACPZ | 18-bit, 666 kSPS, same LQFP-48 package; higher resolution but lower speed; 95 dB SNR @ 100 kHz; no Warp Mode. | Used where extended dynamic range outweighs sampling rate, e.g., high-precision weigh scales or seismic sensors. | Choose AD7679ACPZ when ENOB >15 bits is mandatory and 666 kSPS meets system timing requirements. |
Compared with AD7671ACP, AD7665ASTZ trades speed and power efficiency for legacy compatibility, while AD7679ACPZ prioritizes resolution over rate-making AD7671ACP the optimal balance of 16-bit precision, 1 MSPS throughput, and adaptive power management in space-constrained industrial designs.
Availability
AD7671ACP is available at Aetrix Electronics and suitable for data acquisition, communications test equipment, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7671ACP 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7671ACP belongs to the PulSAR® family of precision SAR ADCs, designed specifically for high-speed, low-latency, single-supply data acquisition in industrial, medical, and test & measurement systems.
FAQ
What is the maximum sampling rate of the AD7671ACP and under what conditions is it guaranteed?
The AD7671ACP achieves a maximum sampling rate of 1 MSPS in Warp Mode. This rate is guaranteed only when the time between consecutive conversions does not exceed 1 ms; otherwise, the first conversion after a longer idle period must be discarded to maintain full specified accuracy. The AD7671ACP datasheet explicitly defines this timing constraint in its timing specifications table.
Does the AD7671ACP require an external reference voltage, and what are its voltage limits?
Yes, the AD7671ACP requires an external reference voltage applied to the REF pin, with REFGND tied to AGND. The supported range is 2.3 V to (AVDD – 1.85 V), i.e., 2.3 V to 3.15 V when AVDD = 5 V. The AD7671ACP draws up to 200 µA from the reference source at 1 MSPS, and reference stability directly impacts gain accuracy and INL performance.
How does the AD7671ACP handle analog input ranges, and are they software-configurable?
The AD7671ACP supports six analog input ranges (±10 V, ±5 V, ±2.5 V, 0–10 V, 0–5 V, 0–2.5 V) via hardware configuration of the IND, INC, INB, and INA pins using external resistors per Table I in the AD7671ACP datasheet. These ranges are not software-selectable; changing range requires physical reconfiguration of the input scaling network.
Can the AD7671ACP operate with a 3 V digital interface while using a 5 V analog supply?
Yes, the AD7671ACP supports mixed-voltage operation: AVDD and DVDD are both 5 V, while OVDD can be set to 3 V to interface with 3 V logic systems. The digital outputs (D[15:0], BUSY, etc.) are referenced to OVDD, and input thresholds (VIH/VIL) scale accordingly - confirmed by the AD7671ACP's "Digital Inputs" and "Digital Outputs" specification tables.
Is the AD7671ACP pin-to-pin compatible with other devices in the PulSAR family?
Yes, the AD7671ACP is pin-to-pin compatible with the AD7665 and AD7664 in the same 48-lead LQFP package, enabling drop-in upgrades with improved speed (1 MSPS vs. 250 kSPS) and enhanced AC performance. This compatibility is explicitly stated in the AD7671ACP General Description and Product Highlights sections.
AD7671ACP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 48-VFQFN Exposed Pad, CSP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LFCSP-VQ (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7671ACP FAQ
1.How can I place an order for AD7671ACP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7671ACP 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 AD7671ACP reliable?
The price and inventory of AD7671ACP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7671ACP is usually 5 days.
3.What payment methods are accepted for AD7671ACP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7671ACP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7671ACP?
AD7671ACP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7671ACP 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 AD7671ACP?
For technical support, including AD7671ACP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7671ACP requirements.
6.How does Aetrix verify that AD7671ACP is sourced from the original manufacturer or authorized distributors?
All AD7671ACP 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 AD7671ACP meets industry standards.
7.What is the process for return or replacement of AD7671ACP?
All AD7671ACP units undergo pre-shipment inspection (PSI). If there is an issue with AD7671ACP, 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 AD7671ACP part is unused and in its original packaging.
Return procedure for AD7671ACP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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