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Analog Devices Inc. AD7665ACPZ
- Part No.:
- AD7665ACPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7665ACPZ.pdf
- Description:
- IC ADC 16BIT SAR 48LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
AD7665ACPZ from Analog Devices is a 16-bit, 570 kSPS charge redistribution SAR analog-to-digital converter operating from a single 5 V supply. It delivers ±2.5 LSB INL, 90 dB SNR at 180 kHz, and supports bipolar (±10 V, ±5 V) and unipolar (0–10 V) input ranges with no pipeline delay. It serves as the precision front-end ADC in high-speed data acquisition systems requiring deterministic latency and dc/ac accuracy.
For engineers reviewing the AD7665ACPZ datasheet, AD7665ACPZ pinout, AD7665ACPZ application, or AD7665ACPZ equivalent, this page provides verified technical context, mode-specific timing behavior (Warp/Normal/Impulse), interface flexibility (parallel 16-bit or SPI/QSPI/MICROWIRE serial), and real-world application mapping for instrumentation, spectrum analysis, and medical signal digitization.
Technical Context
The AD7665ACPZ implements a capacitor-based successive approximation architecture with an integrated resistor scaler enabling configurable input ranges without external gain stages. Its conversion core uses a 16-bit switched-capacitor DAC and on-chip calibration logic to achieve guaranteed no-missing-codes performance and 2.5 LSB max INL across –40°C to +85°C.
It supports three hardware-selectable operating modes: Warp Mode (1.75 µs conversion time, 570 kSPS), Normal Mode (2 µs, 500 kSPS, full accuracy independent of minimum rate), and Impulse Mode (2.25 µs, 444 kSPS, power scaled linearly with throughput). All modes retain immediate data availability with zero pipeline delay and support both straight binary and twos-complement output formats.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - ensures full dynamic range utilization and eliminates code gaps in critical measurement applications. |
| Throughput Rate | 570 kSPS in Warp Mode - enables real-time capture of signals up to 180 kHz Nyquist bandwidth with 90 dB SNR. |
| INL | ±2.5 LSB max - guarantees monotonicity and <0.0038% full-scale linearity error for precision calibration tasks. |
| SNR / THD | 90 dB / –100 dB at 180 kHz - supports high-fidelity spectral analysis and low-distortion communication channel monitoring. |
| Analog Input Ranges | Bipolar ±10 V, ±5 V, ±2.5 V or unipolar 0–10 V, 0–5 V, 0–2.5 V - selectable via external resistor network per Table I, no op-amp buffering required. |
| Power Dissipation | 64 mW typical at 570 kSPS; 7 µW in power-down - enables thermally constrained embedded designs and battery-backed systems. |
| Interface Options | Parallel (8/16-bit) or 2-wire serial (SPI/QSPI/MICROWIRE/DSP-compatible) - allows direct connection to FPGAs, microcontrollers, or DSPs at 3 V or 5 V logic levels. |
Pinout & Package
AD7665ACPZ is packaged in a 48-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle connected to AGND. Pin compatibility is maintained with AD7663/AD7664 in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pins 1, 36) | Analog Power Ground | Reference return for analog circuitry; must be star-connected to minimize noise coupling into sensitive input path. |
| AVDD (Pin 2) | Analog Power Supply | 5 V ±5% supply for analog core; decoupling required within 1 cm of pin to maintain SNR performance. |
| CNVST (Pin 35) | Conversion Start Trigger | Falling-edge initiated sample-and-hold; aperture jitter of 5 ps rms enables accurate high-frequency sampling. |
| D[15:0] (Pins 9–12, 13–16, 21, 22, 23, 24, 25–28) | Data Output Bus | 16-bit parallel output; BYTESWAP pin configures MSB/LSB byte order for seamless integration with 8-bit microcontroller buses. |
| SER/PAR (Pin 8) | Interface Mode Select | LOW = parallel mode (D[15:0] active); HIGH = serial mode (D[1:0], D[2:3], D[8], D[9], D[10], D[11] repurposed as SDOUT/SCLK/SYNC/RDERROR). |
| WARP / IMPULSE (Pins 6, 7) | Operating Mode Control | Hardware-selectable modes: WARP=HIGH+IMPULSE=LOW → 570 kSPS; IMPULSE=HIGH+WARP=LOW → power-proportional scaling. |
| REF / REFGND (Pins 37, 38) | External Reference Interface | Accepts 2.3–2.5 V reference; current drain ≤114 µA at 570 kSPS - compatible with low-power precision references like ADR431. |
| INGND / INA(R) / INB(2R) / INC(4R) / IND(4R) (Pins 39–43) | Analog Input Configuration Terminals | Resistive scaler inputs; configuration per Table I determines input range and impedance (e.g., ±5 V range = 3.41 kΩ differential input impedance). |
Key Features
| Feature | Design Value |
|---|---|
| Zero Pipeline Delay | Conversion result available immediately after BUSY goes LOW - eliminates timing uncertainty in closed-loop control and multiplexed multi-channel systems. |
| Factory-Calibrated DC & AC Performance | Guaranteed INL, gain, offset, SNR, and THD tested over temperature - removes need for system-level calibration in production test. |
| Flexible Input Range Scaling | Hardware-configurable bipolar/unipolar ranges via external resistor connections - avoids external op-amp gain stages and associated noise/error sources. |
| Low-Power Operating Modes | Impulse Mode scales power linearly with throughput; Power-Down Mode draws ≤7 µW - extends battery life in portable instrumentation. |
| 3 V / 5 V Digital Interface Compatibility | OVDD supplies I/O interface independently (2.7–5.25 V); supports direct interfacing to modern low-voltage FPGAs and MCUs without level shifters. |
Applications
| High-Speed Data Acquisition | Spectrum Analysis |
|---|---|
Use Scenario: Simultaneous sampling of multiple sensor channels (e.g., vibration, temperature, strain) in industrial PLCs with deterministic latency requirements. IC Role / Device Role / Timing Role: Precision front-end ADC providing synchronized 16-bit samples at ≥500 kSPS with zero pipeline delay for real-time FFT processing. Use Value: Enables accurate phase correlation between channels and preserves transient fidelity up to 180 kHz due to 90 dB SNR and 5 ps aperture jitter. | Use Scenario: Real-time RF signal monitoring in base station receivers or EMI test equipment requiring wide dynamic range and harmonic-free digitization. IC Role / Device Role / Timing Role: High-linearity ADC capturing baseband or IF signals with –100 dB THD and 100 dB SFDR for clean spectral reconstruction. Use Value: Supports detection of low-level spurs adjacent to strong carriers without distortion masking, critical for compliance testing and spectral occupancy analysis. |
| Medical Instrumentation | Process Control Systems |
Use Scenario: Digitizing ECG, EEG, or ultrasound echo signals where baseline stability, low noise, and absence of missing codes are clinically mandated. IC Role / Device Role / Timing Role: Primary ADC in patient-monitoring front-end delivering calibrated 16-bit resolution with ±2.5 LSB INL over full industrial temperature range. Use Value: Ensures diagnostic-grade waveform integrity and eliminates interpolation artifacts during digital filtering or display rendering. | Use Scenario: Closed-loop feedback in servo drives or power inverters where ADC latency directly impacts control loop stability and response time. IC Role / Device Role / Timing Role: Deterministic-latency ADC feeding real-time DSP with immediate data availability post-conversion (no pipeline delay). Use Value: Reduces control loop jitter and improves torque ripple suppression by eliminating variable conversion latency inherent in pipelined architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7664ACPZ | 16-bit, 500 kSPS, identical pinout and package; lacks Warp Mode (max 500 kSPS), slightly lower SNR (89 dB typ @ 180 kHz) | Lower-cost option where 570 kSPS not required; suitable for cost-sensitive instrumentation with relaxed speed needs. | Select AD7664ACPZ when maximum throughput of 500 kSPS suffices and budget constraints outweigh need for Warp Mode headroom. |
| ADS8860IDRCT | 16-bit, 1 MSPS, SPI-only interface, 1.8 V supply, 12.5 mW power; no parallel bus, different pinout, requires external reference | Battery-powered portable devices needing higher speed and ultra-low power; incompatible with legacy 5 V parallel interfaces. | Choose ADS8860IDRCT for new low-voltage, space-constrained designs prioritizing power efficiency and SPI simplicity over parallel compatibility. |
Compared with AD7664ACPZ, AD7665ACPZ adds 70 kSPS headroom and Warp Mode timing determinism; versus ADS8860IDRCT, it retains 5 V parallel interfacing and factory-calibrated ac/dc specs but consumes more power - selection depends on interface legacy, speed margin, and calibration assurance requirements.
Availability
AD7665ACPZ is available at Aetrix Electronics and suitable for high-speed data acquisition, spectrum analysis, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7665ACPZ 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, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7665ACPZ belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered for applications demanding high speed, low power, and guaranteed ac/dc accuracy without pipeline latency - especially in test & measurement, communications infrastructure, and industrial automation.
FAQ
What are the supported analog input voltage ranges for AD7665ACPZ?
The AD7665ACPZ supports bipolar ranges of ±10 V, ±5 V, and ±2.5 V, and unipolar ranges of 0–10 V, 0–5 V, and 0–2.5 V. These are configured using external resistor connections to pins INA(R), INB(2R), INC(4R), IND(4R), and INGND per Table I in the datasheet. The internal resistive scaler ensures the DAC input remains 0–2.5 V regardless of selected range, preserving linearity and reducing external component count. AD7665ACPZ does not require external op-amps for range adaptation.
Does AD7665ACPZ require an external reference voltage?
Yes, AD7665ACPZ requires an external precision reference voltage applied to the REF pin (Pin 37), with REFGND (Pin 38) as its return. The reference voltage must be between 2.3 V and 2.5 V, and the device draws ≤114 µA from it at 570 kSPS. Common choices include the ADR431 (2.5 V) or ADR421 (2.048 V) - both low-noise, low-drift references. AD7665ACPZ does not include an internal reference and cannot operate without this external source.
How does the Warp Mode operation differ from Normal Mode in AD7665ACPZ?
In Warp Mode (WARP = HIGH, IMPULSE = LOW), AD7665ACPZ achieves 570 kSPS with a 1.75 µs conversion time but requires a minimum sustained conversion rate to maintain full specified accuracy. In Normal Mode (WARP = LOW), it operates at 500 kSPS with 2 µs conversion time and guarantees full accuracy regardless of minimum throughput - making it more robust for burst-mode or variable-rate applications. Both modes retain zero pipeline delay and identical dc/ac specifications otherwise.
Can AD7665ACPZ interface directly with a 3 V microcontroller?
Yes, AD7665ACPZ can interface directly with a 3 V microcontroller via its OVDD pin (Pin 18), which powers the digital I/O interface independently. When OVDD is set to 3 V, all digital outputs (D[15:0], BUSY, SYNC, SDOUT, etc.) comply with 3 V logic levels, and digital inputs (CS, RD, SER/PAR, etc.) accept 3 V–compatible thresholds. This eliminates level shifters while maintaining full functionality in serial or parallel mode - confirmed by VIH/VIL specs supporting 2.0 V–3.3 V logic.
Is AD7665ACPZ pin-compatible with earlier Analog Devices ADCs?
Yes, AD7665ACPZ is pin-to-pin compatible with the AD7663ACPZ and AD7664ACPZ in both 48-lead LQFP and 48-lead LFCSP packages. This allows drop-in upgrades with improved performance: AD7665ACPZ adds Warp Mode (570 kSPS vs. 500 kSPS), tighter INL (±2.5 LSB vs. ±3 LSB), and enhanced SNR (90 dB vs. 89 dB). No PCB layout changes are needed when replacing AD7663ACPZ or AD7664ACPZ with AD7665ACPZ.
AD7665ACPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 48-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 570k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, Parallel, 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- True Bipolar
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LFCSP-VQ (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7665ACPZ FAQ
1.How can I place an order for AD7665ACPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7665ACPZ 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 AD7665ACPZ reliable?
The price and inventory of AD7665ACPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7665ACPZ is usually 5 days.
3.What payment methods are accepted for AD7665ACPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7665ACPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7665ACPZ?
AD7665ACPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7665ACPZ 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 AD7665ACPZ?
For technical support, including AD7665ACPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7665ACPZ requirements.
6.How does Aetrix verify that AD7665ACPZ is sourced from the original manufacturer or authorized distributors?
All AD7665ACPZ 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 AD7665ACPZ meets industry standards.
7.What is the process for return or replacement of AD7665ACPZ?
All AD7665ACPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7665ACPZ, 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 AD7665ACPZ part is unused and in its original packaging.
Return procedure for AD7665ACPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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