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Analog Devices Inc. AD7677ACPZ
- Part No.:
- AD7677ACPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7677ACPZ.pdf
- Description:
- IC ADC 16BIT DIFF INP 48-LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,325
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Product details
Overview
AD7677ACPZ from Analog Devices is a 16-bit, 1 MSPS, fully differential successive approximation register (SAR) analog-to-digital converter operating from a single 5 V supply. It delivers ±1 LSB INL, 94 dB SNR at 45 kHz, and no missing codes across its ±2.5 V differential input range. It serves as the high-precision front-end ADC in medical CT scanners and portable spectrum analyzers requiring pipeline-free, low-latency digitization.
For engineers reviewing the AD7677ACPZ datasheet, AD7677ACPZ pinout, AD7677ACPZ application, or AD7677ACPZ equivalent, this page provides verified technical context, mode-specific timing behavior, interface flexibility (parallel/serial, 3 V/5 V), real-world AC/DC accuracy trade-offs across Warp/Normal/Impulse modes, and validated drop-in alternatives for legacy AD7675/AD7676 designs.
Technical Context
The AD7677ACPZ implements a charge redistribution SAR architecture with on-chip track-and-hold, delivering true differential sampling without pipeline delay. Its three operational modes-Warp (1 MSPS, 1 µs conversion, requires ≤1 ms inter-conversion interval), Normal (800 kSPS, no timing constraints), and Impulse (666 kSPS, power scaled to throughput)-are selected via dedicated WARP and IMPULSE digital inputs.
It supports dual interface configurations: 16-bit parallel (with BYTESWAP and OB/2C control) or 2-wire serial (SYNC/SCLK/SDOUT), both compatible with 3 V or 5 V logic levels via OVDD. Reference handling is external (2.3–2.5 V), with REFGND and REF pins enabling precise differential reference coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits - guarantees no missing codes and full-scale quantization step of 76.3 µV over ±2.5 V range |
| Throughput Rate | 1 MSPS in Warp Mode - enables real-time capture of 500 kHz baseband signals per Nyquist criterion |
| INL | ±1 LSB max - ensures monotonicity and <0.0015% full-scale linearity error for precision instrumentation |
| S/(N+D) | 94 dB typical @ 45 kHz - supports >15-bit effective resolution in audio and IF band applications |
| Power Dissipation | 115 mW @ 1 MSPS, 15 µW @ 100 SPS - scalable consumption enables battery operation in Impulse mode |
| Analog Input Range | Differential ±2.5 V - allows direct connection to transformer-coupled or op-amp buffered sensor outputs |
| Interface Voltage | OVDD = 2.7–5.25 V - permits seamless interfacing with 3 V microcontrollers or 5 V FPGAs |
Pinout & Package
AD7677ACPZ is housed in a 48-lead LFCSP (Lead Frame Chip Scale Package), measuring 7 mm × 7 mm × 0.85 mm, with exposed thermal pad for enhanced thermal performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog input pair | Accepts true differential signal up to ±2.5 V; CMRR ≥85 dB at 10 kHz minimizes common-mode noise pickup |
| REF, REFGND | External reference voltage interface | Supports 2.3–2.5 V external reference; REFGND must be star-connected to AGND to avoid ground loop errors |
| CNVST | Conversion start trigger | Falling-edge sensitive; initiates acquisition hold and conversion; aperture jitter only 5 ps rms |
| BUSY | Conversion status indicator | Active-HIGH during conversion; falling edge signals valid data ready for read-no pipeline delay |
| SER/PAR, RD, CS | Interface mode and bus control | SER/PAR selects serial/parallel; RD/CS enable output drivers-supports multiplexed multi-ADC systems |
| WARP, IMPULSE | Mode selection inputs | Hardware-configured modes: Warp (max speed), Impulse (min power), Normal (balanced accuracy/speed) |
| OVDD, DGND, AGND, OGND | Supply and ground domains | Separate analog/digital/interface grounds prevent noise coupling; OVDD powers I/O buffers independently |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate data availability after BUSY falls-enables deterministic timing in closed-loop control systems |
| Three selectable conversion modes | Warp (1 MSPS), Normal (800 kSPS), Impulse (666 kSPS @ scalable power)-eliminates firmware-based power management overhead |
| True differential input architecture | Rejects common-mode noise and even-order harmonics-critical for high-fidelity medical imaging front-ends |
| Single 5 V supply operation | Eliminates need for dual ±5 V rails; internal regulation reduces BOM count and layout complexity |
| Pin-to-pin compatibility | Direct upgrade path from AD7675/AD7676-no PCB redesign required for performance migration |
Applications
| CT Scanner Signal Chain | Spectrum Analyzer Front-End |
|---|---|
Use Scenario: Digitizing X-ray detector outputs with sub-percent linearity and minimal harmonic distortion across 0–500 kHz bandwidth. IC Role / Device Role / Timing Role: Primary high-speed differential ADC capturing pre-amplified detector currents; BUSY-driven readout synchronizes with FPGA DMA. Use Value: ±1 LSB INL and 94 dB S/(N+D) ensure accurate attenuation coefficient reconstruction; Warp mode supports real-time volumetric scan rates. |
Use Scenario: Capturing RF intermediate frequency (IF) signals at 45 kHz for FFT-based spectral analysis in handheld test equipment. IC Role / Device Role / Timing Role: Precision digitizer in zero-IF receiver chain; uses Normal mode for asynchronous trigger-based acquisition. Use Value: 85 dB CMRR rejects local oscillator leakage; THD of –110 dB prevents spurious bin generation in narrowband measurements. |
| Battery-Powered Data Logger | Industrial Process Controller |
Use Scenario: Long-term monitoring of temperature, pressure, and vibration sensors in remote field deployments with 10-year battery life targets. IC Role / Device Role / Timing Role: Low-power ADC in sleep-wake cycle; Impulse mode activates only during scheduled 100 SPS burst sampling. Use Value: 15 µW power draw at 100 SPS extends battery life; differential input rejects EMI in unshielded industrial environments. |
Use Scenario: Closed-loop feedback digitization in PLC analog I/O modules requiring deterministic latency and immunity to 50/60 Hz mains noise. IC Role / Device Role / Timing Role: Real-time sensor interface with BUSY-synchronized readout; uses Normal mode for jitter-free timing under variable load conditions. Use Value: Aperture jitter of 5 ps rms ensures stable phase measurement; separate AGND/DGND/OGND domains isolate control logic noise from analog path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed differential ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7675AST | Same 48-lead LQFP package; 800 kSPS max throughput; ±1.5 LSB INL; no Impulse mode | Lacks power-scaling capability; unsuitable for battery-powered burst-sampling systems | Select when cost-sensitive LQFP footprint is mandatory and 1 MSPS is not required |
| AD7676AST | Same 48-lead LQFP; 1 MSPS Warp mode; ±1.25 LSB INL; 92 dB SNR typ | Lower AC performance than AD7677ACPZ; no Impulse mode; higher power in Normal mode | Choose for legacy LQFP-based designs needing 1 MSPS but tolerating 2 dB SNR penalty |
Compared with AD7675AST and AD7676AST, the AD7677ACPZ offers superior DC linearity (±1 LSB vs. ±1.25/±1.5), higher SNR (94 dB vs. 92 dB), and unique Impulse mode for ultra-low-power operation-making it the optimal choice for new designs prioritizing precision, speed, and energy efficiency.
Availability
AD7677ACPZ is available at Aetrix Electronics and suitable for CT scanner signal chains, portable spectrum analyzers, battery-powered data loggers, industrial process controllers, and medical instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for AD7677ACPZ 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, serving precision instrumentation, industrial automation, and medical imaging markets since 1965.
The AD7677ACPZ belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered specifically for applications demanding high resolution, fast throughput, and true differential input fidelity without pipeline latency.
FAQ
What is the maximum guaranteed throughput of AD7677ACPZ in Warp Mode?
The AD7677ACPZ achieves a maximum guaranteed throughput of 1 MSPS in Warp Mode, with a complete conversion cycle time of 1 µs. However, full specified accuracy-including ±1 LSB INL and 94 dB S/(N+D)-requires that the time between consecutive conversions does not exceed 1 ms. Exceeding this interval invalidates the first conversion result after the gap.
Does AD7677ACPZ require an external reference voltage?
Yes, the AD7677ACPZ requires an external reference voltage applied to the REF pin, with a specified range of 2.3 V to 2.5 V. The REFGND pin must be connected to a clean analog ground, separate from AGND if possible, to maintain reference stability. No internal reference is provided-the device relies entirely on the external source for full-scale definition.
How does the Impulse Mode reduce power consumption in AD7677ACPZ?
In Impulse Mode (IMPULSE = HIGH, WARP = LOW), the AD7677ACPZ dynamically scales its internal clock and bias currents to match the actual sampling rate. At 100 SPS, power dissipation drops to 15 µW-reducing average current by over 7,000× versus 1 MSPS operation-while maintaining full DC and AC specifications, making it ideal for intermittent sensing applications.
Is AD7677ACPZ pin-compatible with AD7676AST?
Yes, the AD7677ACPZ is pin-to-pin compatible with the AD7676AST in the same 48-lead LQFP package (ST-48). However, the AD7677ACPZ uses a different package (LFCSP, CP-48), so mechanical compatibility applies only when comparing against the LQFP variant AD7677AST. The LFCSP version requires updated land pattern and reflow profile.
What interface options does AD7677ACPZ support, and how are they selected?
The AD7677ACPZ supports both parallel (16-bit or 8-bit with BYTESWAP) and 2-wire serial (SYNC/SCLK/SDOUT) interfaces. Selection is controlled by the SER/PAR pin: LOW enables parallel mode with DATA[15:0] outputs; HIGH enables serial mode, repurposing several DATA pins as SDOUT, SCLK, and SYNC. OVDD sets I/O voltage level (3 V or 5 V).
AD7677ACPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 48-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- 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:
- -
AD7677ACPZ FAQ
1.How can I place an order for AD7677ACPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7677ACPZ 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 AD7677ACPZ reliable?
The price and inventory of AD7677ACPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7677ACPZ is usually 5 days.
3.What payment methods are accepted for AD7677ACPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7677ACPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7677ACPZ?
AD7677ACPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7677ACPZ 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 AD7677ACPZ?
For technical support, including AD7677ACPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7677ACPZ requirements.
6.How does Aetrix verify that AD7677ACPZ is sourced from the original manufacturer or authorized distributors?
All AD7677ACPZ 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 AD7677ACPZ meets industry standards.
7.What is the process for return or replacement of AD7677ACPZ?
All AD7677ACPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7677ACPZ, 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 AD7677ACPZ part is unused and in its original packaging.
Return procedure for AD7677ACPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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