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Analog Devices Inc. AD7652ACPZ
- Part No.:
- AD7652ACPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD7652ACPZ.pdf
- Description:
- IC ADC 16BIT SAR 48LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
AD7652ACPZ from Analog Devices is a 16-bit, 500 kSPS charge redistribution SAR analog-to-digital converter operating from a single 5 V supply, featuring an internal 2.5 V reference (±7 ppm/°C drift), no pipeline delay, and dual parallel/serial (SPI/QSPI/MICROWIRE/DSP-compatible) interface - used in high-accuracy data acquisition systems requiring fast settling and low power at full throughput.
For engineers reviewing the AD7652ACPZ datasheet, AD7652ACPZ pinout, AD7652ACPZ application, or AD7652ACPZ equivalent, this page delivers verified specifications, validated package mapping (48-lead LQFP/LFCSP), confirmed interface timing behavior, real-world SNR (86 dB @ 100 kHz), and documented alternative selections for unipolar 16-bit SAR ADC replacement in instrumentation and spectrum analysis.
Technical Context
The AD7652ACPZ implements a switched-capacitor SAR architecture with integrated error correction circuitry and on-chip track-and-hold, eliminating pipeline latency and enabling immediate data availability after conversion. Its internal reference provides 2.48–2.52 V output with ±7 ppm/°C temperature drift over –40°C to +85°C.
It supports both parallel (16-bit, 5 V/3 V tolerant) and serial (master/slave SPI-compatible) modes via SER/PAR control, with configurable clocking (internal/external SCLK), frame sync (SYNC), and data format (straight binary/twos complement via OB/2C). Power scales dynamically: 65 mW at 500 kSPS without reference, 80 mW with reference enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 38.15 µV LSB step size over 0 V to 2.5 V input range. |
| Throughput Rate | 500 kSPS - complete conversion cycle in 2 µs; no latency between sample and valid output. |
| INL / DNL | ±6 LSB / –2 to +3 LSB - guarantees monotonicity and ≤15-bit linearity across full temperature range. |
| SNR / SFDR | 86 dB / 98 dB @ 100 kHz - enables high-fidelity signal capture in spectrum analysis and medical instruments. |
| Reference Voltage | 2.5 V ±1% @ 25°C, ±7 ppm/°C drift - eliminates need for external precision reference in most applications. |
| Power Dissipation | 65 mW @ 500 kSPS (no REF); drops to 130 µW @ 1 kSPS - suitable for battery-powered systems. |
| Aperture Jitter | 5 ps rms - ensures <0.1 LSB error up to ~12 MHz input bandwidth (–3 dB point). |
Pinout & Package
AD7652ACPZ is available in two RoHS-compliant packages: 48-lead LQFP (ST-48) and 48-lead LFCSP (CP-48), both specified for –40°C to +85°C operation. Pin functions are identical across packages; NC pins (3, 6, 7, 40) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN / INGND | Analog input differential pair | Unipolar 0 V to 2.5 V input referenced to dedicated analog ground; supports 12 MHz bandwidth. |
| REF / REFGND | Internal reference output | 2.5 V reference source with ±7 ppm/°C drift; REFGND must be tied to AGND for accuracy. |
| CNVST | Conversion start trigger | Falling-edge initiated sampling; aperture delay = 2 ns - critical for low-jitter timing-critical systems. |
| BUSY | Conversion status indicator | Active-HIGH pulse lasting 1.25 µs - falling edge serves as precise data-ready strobe for synchronous read. |
| SER/PAR | Interface mode select | LOW = 16-bit parallel (D[15:0], RD, CS); HIGH = serial (SDOUT/SCLK/SYNC) with configurable clock source. |
| PDREF / PDBUF | Reference power control | PDREF LOW enables internal ref; PDBUF LOW activates internal buffer - allows external ref bypass or buffered output. |
| OB/2C | Data format selector | HIGH = straight binary (0x0000–0xFFFF); LOW = twos complement (0x8000–0x7FFF) - sets output coding convention. |
| TEMP | On-chip temperature sensor | 300 mV @ 25°C, 1 mV/°C slope - enables system-level thermal monitoring without external sensor. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Conversion result latched immediately after BUSY falls - enables deterministic timing in closed-loop control. |
| Dual-voltage interface | OVDD supports 2.7–5.25 V logic - allows direct connection to 3 V microcontrollers or 5 V FPGAs without level shifters. |
| Configurable serial clock | Internal SCLK period adjustable from 25 ns to 280 ns via DIVSCLK[1:0] - matches host processor timing constraints. |
| Low-power scaling | Current drops from 12.2 mA (500 kSPS w/REF) to 3 µA (1 kSPS w/REF) - ideal for duty-cycled portable instrumentation. |
| Integrated temperature sensing | Monolithic TEMP pin outputs calibrated 300 mV @ 25°C with 1 mV/°C linearity - reduces BOM count in thermal-aware designs. |
Applications
| Data Acquisition Systems | Medical Instrumentation |
|---|---|
|
Use Scenario: High-channel-count industrial DAQ with multiplexed analog inputs requiring synchronized sampling and minimal latency. IC Role / Device Role / Timing Role: Primary SAR ADC handling 0–2.5 V sensor signals; CNVST-triggered acquisition ensures sub-ns jitter alignment across channels. Use Value: No pipeline delay enables true simultaneous sampling across multiple AD7652ACPZ units daisy-chained via SDIN/SDOUT, reducing system-level synchronization overhead. |
Use Scenario: Portable ECG or EEG front-end where signal fidelity, low power, and compact layout are critical. IC Role / Device Role / Timing Role: Precision digitizer for biopotential amplifiers; internal 2.5 V reference eliminates external ref IC and associated noise coupling paths. Use Value: 86 dB SNR and 98 dB SFDR preserve diagnostic waveform integrity; 130 µW standby power extends battery life in handheld devices. |
| Spectrum Analysis Equipment | Process Control Monitoring |
|
Use Scenario: Real-time RF spectrum analyzer capturing 100 kHz–12 MHz baseband signals with high dynamic range. IC Role / Device Role / Timing Role: Digitizer stage feeding FPGA-based FFT engine; parallel interface delivers 16-bit words at 500 MSPS-equivalent burst rate. Use Value: 5 ps aperture jitter and –96 dB THD @ 100 kHz ensure accurate harmonic content representation for spectral purity validation. |
Use Scenario: PLC analog input module measuring pressure, temperature, and flow transducers in harsh industrial environments. IC Role / Device Role / Timing Role: Isolated channel ADC interfacing with sigma-delta sensors; TEMP pin monitors local die temperature for gain/offset compensation. Use Value: ±7 ppm/°C reference drift and –40°C to +85°C operation guarantee calibration stability across factory floor temperature swings. |
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 |
|---|---|---|---|
| AD7651ACPZ | Lower throughput (250 kSPS), same 16-bit resolution, identical pinout and interface - lacks internal reference buffer. | Best suited for cost-sensitive, lower-speed DAQ where reference buffering is handled externally. | Select AD7651ACPZ only if 250 kSPS suffices and external reference conditioning is acceptable. |
| AD7660ARUZ | 500 kSPS, 16-bit, but pseudo-differential input (not true unipolar); requires external reference; different pinout (28-TSSOP). | Applicable where input signal common-mode is stable and board space is constrained - not drop-in compatible. | Choose AD7660ARUZ only when redesigning layout and accepting external reference dependency. |
Compared with AD7652ACPZ, AD7651ACPZ trades speed for cost and reduced feature set, while AD7660ARUZ sacrifices unipolar simplicity and pin compatibility for smaller footprint - neither offers the integrated reference + buffer + zero-latency combination of AD7652ACPZ.
Availability
AD7652ACPZ is available at Aetrix Electronics and suitable for data acquisition, medical instrumentation, spectrum analysis, and process control applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7652ACPZ 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 a legacy of precision converter innovation.
The AD7652ACPZ belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered specifically for high-speed, low-latency, high-resolution data acquisition in instrumentation, medical, and industrial test equipment.
FAQ
What is the maximum input voltage range supported by the AD7652ACPZ?
The AD7652ACPZ supports a unipolar analog input voltage range of 0 V to 2.5 V (relative to INGND), with absolute input limits of –0.1 V to +3 V. Exceeding these ranges risks damage or specification violation. The internal 2.5 V reference defines full-scale, yielding a 38.15 µV LSB step size. For wider ranges, external signal conditioning is required - the AD7652ACPZ itself does not support bipolar or extended input spans.
Does the AD7652ACPZ require an external reference, or can it operate with its internal reference?
The AD7652ACPZ can operate fully autonomously using its internal 2.5 V reference (typical 2.50 V ±1% at 25°C, ±7 ppm/°C drift). PDREF pin must be held LOW to enable it. An external reference may be applied via REFBUFIN when higher initial accuracy or custom voltage is needed - but doing so disables the internal reference and requires external buffering if driving heavy loads. The AD7652ACPZ is designed for self-contained operation without external references in most precision applications.
How does the AD7652ACPZ handle power consumption at varying throughput rates?
AD7652ACPZ power scales linearly with throughput: 65 mW typical at 500 kSPS without reference, dropping to just 130 µW at 1 kSPS. With internal reference enabled, dissipation rises to 80 mW at full speed. This is achieved via dynamic current control in AVDD, DVDD, and OVDD domains - confirmed in Figure 15 of the datasheet. The PD pin allows full shutdown, reducing quiescent current further. This scalability makes AD7652ACPZ viable for both continuous high-speed logging and ultra-low-power wake-on-event systems.
Can the AD7652ACPZ interface directly with a 3 V microcontroller without level shifting?
Yes - the AD7652ACPZ supports dual-voltage I/O via OVDD (2.7 V to 5.25 V), allowing its parallel and serial digital interfaces to operate natively at 3 V logic levels. When OVDD = 3.3 V, all digital outputs (D[15:0], BUSY, SYNC, SDOUT) meet 3 V VOH/VOL specs, and inputs (RD, CS, SER/PAR) accept 3 V logic thresholds. No external level shifters are needed, simplifying interconnect with ARM Cortex-M or RISC-V MCUs running at 3.3 V.
What is the significance of the TEMP pin on the AD7652ACPZ, and how is it calibrated?
The TEMP pin on AD7652ACPZ provides a factory-calibrated analog voltage proportional to die temperature: 300 mV at 25°C with 1 mV/°C slope and ±2°C accuracy over –40°C to +85°C. It requires no external components and draws negligible current. This monolithic sensor enables real-time thermal compensation of gain/offset errors in high-precision systems - for example, correcting reference drift or amplifier offset in medical front-ends. The AD7652ACPZ datasheet specifies output resistance (4.3 kΩ) and linearity to support accurate ADC measurement of the TEMP voltage itself.
AD7652ACPZ 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):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LFCSP-VQ (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7652ACPZ FAQ
1.How can I place an order for AD7652ACPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7652ACPZ 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 AD7652ACPZ reliable?
The price and inventory of AD7652ACPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7652ACPZ is usually 5 days.
3.What payment methods are accepted for AD7652ACPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7652ACPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7652ACPZ?
AD7652ACPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7652ACPZ 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 AD7652ACPZ?
For technical support, including AD7652ACPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7652ACPZ requirements.
6.How does Aetrix verify that AD7652ACPZ is sourced from the original manufacturer or authorized distributors?
All AD7652ACPZ 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 AD7652ACPZ meets industry standards.
7.What is the process for return or replacement of AD7652ACPZ?
All AD7652ACPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7652ACPZ, 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 AD7652ACPZ part is unused and in its original packaging.
Return procedure for AD7652ACPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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