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Analog Devices Inc. AD7660ACP
- Part No.:
- AD7660ACP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7660ACP.pdf
- Description:
- IC ADC 16BIT UNIPOLAR 48-LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,096
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Product details
Overview
AD7660ACP from Analog Devices is a 16-bit, 100 kSPS unipolar successive-approximation ADC with single 5 V supply operation, internal conversion clock, and dual serial/parallel interface. It delivers 87 dB SNR at 10 kHz and 3 LSB max INL, targeting precision data acquisition in battery-powered instrumentation and medical instruments.
For engineers reviewing the AD7660ACP datasheet, AD7660ACP pinout, AD7660ACP application, or AD7660ACP equivalent, this page provides verified package mapping (48-lead LFCSP), confirmed timing parameters (t7 = 2 ms conversion time), validated interface modes (SPI/QSPI/MICROWIRE-compatible serial + 16-bit parallel), and real-world ac/dc accuracy specs including –96 dB THD at 10 kHz and 0 V to 2.5 V analog input range.
Technical Context
The AD7660ACP implements a charge redistribution SAR architecture with integrated error correction circuitry and on-chip track-and-hold, eliminating pipeline delay and enabling immediate data availability after conversion completion. Its differential analog input structure samples both IN and INGND simultaneously, achieving 70 dB CMRR at 25 kHz.
It supports three digital interface configurations: parallel 16-bit output with BUSY/RD/CS control, master serial mode with internal SCLK generation, and slave serial mode synchronized to external clock - all compatible with 3 V or 5 V logic levels via OVDD supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full-scale fidelity for precision measurement systems. |
| Throughput Rate | 100 kSPS maximum - enables real-time capture of signals up to 45 kHz with 90 dB typical SNR. |
| Analog Input Range | 0 V to 2.5 V unipolar - matches standard voltage references like ADR291 and simplifies sensor interfacing. |
| INL Error | ±3 LSB max - ensures ≤0.0046% full-scale linearity deviation critical for calibration-grade applications. |
| Power Dissipation | 21 mW typical at 100 kSPS - supports low-power embedded designs; drops to 21 µW at 100 SPS in dynamic scaling. |
| THD | –96 dB max at 10 kHz - minimizes harmonic contamination in spectral analysis and audio-band signal conditioning. |
| Reference Current | 22 mA max at 100 kSPS - defines minimum external reference drive capability (e.g., AD780 requires ≥25 mA). |
Pinout & Package
AD7660ACP is packaged in a 48-lead Lead Frame Chip Scale Package (LFCSP), RoHS-compliant, with exposed thermal pad connected to ground. Pin numbering follows standard top-view layout with pins 1–24 on top row (left-to-right) and 25–48 on bottom row (right-to-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN / INGND | Differential analog input pair | Simultaneous sampling eliminates ground loop errors; supports remote ground sensing in sensor front-ends. |
| REF / REFGND | External reference input | Accepts 2.3 V to 2.5 V reference; 22 mA current draw mandates buffered reference source. |
| CNVST | Conversion start trigger | Falling-edge initiated; aperture jitter of 5 ps rms enables low-jitter sampling for high-fidelity acquisition. |
| BUSY | Conversion status indicator | Active-HIGH during conversion; falling edge serves as precise data-ready strobe for synchronous readout. |
| SER/PAR | Interface mode select | LOW = parallel 16-bit D[15:0]; HIGH = serial mode repurposing D4–D11 for SYNC/SCLK/SDOUT functions. |
| OB/2C | Output coding select | HIGH = straight binary (0x0000 = 0 V); LOW = twos complement (0x8000 = 0 V, 0x0000 = –FSR/2). |
| PD / RESET | Power management controls | PD HIGH enters 7 mW power-down; RESET HIGH aborts ongoing conversion and clears internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Conversion results available immediately after BUSY goes LOW - eliminates latency in closed-loop control and multiplexed channel sequencing. |
| Dual-voltage interface support | OVDD independently configurable from 2.7 V to 5.25 V - enables direct connection to 3 V microcontrollers without level shifters. |
| Factory-calibrated DC performance | Guaranteed gain/offset/linearity over –40°C to +85°C - removes need for system-level calibration in industrial environments. |
| Low kickback input structure | R1–C2 network (3.24 kΩ || 60 pF) limits acquisition transient - reduces external driver requirements and improves anti-aliasing behavior. |
| ESD-protected analog inputs | ±4000 V HBM rating with internal diode clamps - allows robust handling in field-deployable test equipment. |
Applications
| Data Acquisition Systems | Battery-Powered Instrumentation |
|---|---|
Use Scenario: High-resolution logging of multi-channel sensor arrays in portable environmental monitors. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized 16-bit samples at 10–100 kSPS with minimal power overhead. Use Value: 21 mW typical dissipation extends battery life; no missing codes ensures integrity of low-amplitude transducer outputs. |
Use Scenario: Handheld oscilloscope or spectrum analyzer requiring >90 dB SFDR and sub-LSB linearity. IC Role / Device Role / Timing Role: Precision digitizer with immediate data availability and low-latency BUSY signaling for real-time display buffering. Use Value: 87 dB SNR at 10 kHz and –96 dB THD enable clean spectral analysis; power-down mode reduces idle current to 7 mW. |
| Medical Diagnostic Equipment | Industrial Process Control |
Use Scenario: ECG/EEG front-end digitization where baseline stability and harmonic distortion directly impact clinical interpretation. IC Role / Device Role / Timing Role: Unipolar 0–2.5 V ADC interfaced to isolated analog front-end, referenced to precision ADR291. Use Value: ±3 LSB INL and 70 dB CMRR at 25 kHz suppress common-mode interference from mains and switching regulators. |
Use Scenario: PLC analog input module acquiring temperature, pressure, and flow signals across distributed I/O racks. IC Role / Device Role / Timing Role: Ruggedized ADC operating continuously at 25 kSPS with guaranteed specs over –40°C to +85°C. Use Value: Single 5 V supply simplifies power design; LFCSP package withstands vibration and thermal cycling in factory environments. |
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 |
|---|---|---|---|
| AD7664ASTZ | Pin-to-pin compatible; higher 250 kSPS throughput and improved 92 dB SNR at 45 kHz. | Required for >100 kSPS multi-channel systems or higher dynamic range needs. | Select AD7664ASTZ when throughput or SNR margin is critical; shares same LQFP/LFCSP footprint but not drop-in due to different timing margins. |
| AD7663ASTZ | True bipolar input (±VREF), 16-bit, 100 kSPS; lacks OB/2C coding flexibility and has higher 30 mW power draw. | Suitable for AC-coupled or signed-input applications like motor phase current sensing. | Choose AD7663ASTZ only when bipolar range is mandatory; incompatible with unipolar reference topology of AD7660ACP. |
Compared with AD7660ACP, AD7664ASTZ offers higher speed and SNR at cost of increased power and tighter layout constraints, while AD7663ASTZ trades unipolar simplicity for bipolar capability - neither is pin-compatible nor functionally interchangeable without schematic and firmware revision.
Availability
AD7660ACP is available at Aetrix Electronics and suitable for data acquisition, battery-powered instrumentation, and medical diagnostic equipment requiring stable component supply and long-term obsolescence planning.
Supply support for AD7660ACP 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 AD7660ACP belongs to the PulSAR® family of precision SAR ADCs designed for applications demanding high resolution, low power, and flexible digital interfacing without pipeline latency.
FAQ
What is the maximum recommended source impedance for driving the AD7660ACP analog input?
The AD7660ACP analog input presents a dynamic impedance modeled as 3.24 kΩ in series with 60 pF during acquisition. To maintain full 16-bit accuracy and avoid settling errors, Analog Devices specifies a maximum source impedance of 100 Ω for direct drive. Higher impedances require an op-amp buffer such as the OP184, especially when operating near 100 kSPS throughput where acquisition time is fixed at 8 ms.
Does the AD7660ACP support true differential input mode?
No, the AD7660ACP is a unipolar pseudo-differential ADC. It accepts a single-ended input referenced to INGND, with simultaneous sampling of both IN and INGND nodes to reject common-mode noise. It does not support true differential input pairs like the AD7664 or AD7667, which have dedicated IN+ and IN– terminals and bipolar range capability.
Can the AD7660ACP operate with a 3.3 V digital interface while using a 5 V analog supply?
Yes. The AD7660ACP supports independent OVDD supply (2.7 V to 5.25 V) for its digital I/O, allowing direct connection to 3.3 V microcontrollers or FPGAs. AVDD and DVDD remain at 5 V for analog and core digital logic, respectively. This configuration is explicitly validated in the datasheet and requires no level-shifting circuitry.
What is the purpose of the OB/2C pin on the AD7660ACP?
The OB/2C pin selects between straight binary (OB/2C = HIGH) and twos complement (OB/2C = LOW) output coding formats. In straight binary mode, 0x0000 corresponds to 0 V input and 0xFFFF to full-scale (2.5 V). In twos complement mode, 0x8000 represents 0 V, enabling signed arithmetic in DSP-based systems without software conversion.
Is the AD7660ACP RoHS compliant and what is its lead-free status?
Yes, the AD7660ACP is RoHS compliant. The ordering suffix "Z" in AD7660ACPZRL explicitly denotes RoHS compliance per Analog Devices' packaging standards. The LFCSP package uses lead-free solder terminations and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements.
AD7660ACP 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):
- 100k
- 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:
- -
AD7660ACP FAQ
1.How can I place an order for AD7660ACP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7660ACP 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 AD7660ACP reliable?
The price and inventory of AD7660ACP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7660ACP is usually 5 days.
3.What payment methods are accepted for AD7660ACP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7660ACP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7660ACP?
AD7660ACP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7660ACP 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 AD7660ACP?
For technical support, including AD7660ACP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7660ACP requirements.
6.How does Aetrix verify that AD7660ACP is sourced from the original manufacturer or authorized distributors?
All AD7660ACP 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 AD7660ACP meets industry standards.
7.What is the process for return or replacement of AD7660ACP?
All AD7660ACP units undergo pre-shipment inspection (PSI). If there is an issue with AD7660ACP, 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 AD7660ACP part is unused and in its original packaging.
Return procedure for AD7660ACP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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