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Analog Devices Inc. AD7853AR-REEL
- Part No.:
- AD7853AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7853AR-REEL.pdf
- Description:
- IC ADC 12BIT SRL 200KSPS 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:599
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Product details
Overview
AD7853AR-REEL from Analog Devices is a 12-bit, 200 kSPS pseudo-differential successive approximation register (SAR) ADC operating from a single 3 V to 5.5 V supply. It features on-chip 2.5 V reference, self- and system-calibration, flexible SPI/QSPI/8051-compatible serial interface, and 24-lead SOIC packaging. It targets high-accuracy, low-power data acquisition in portable instrumentation and battery-powered control systems.
For engineers reviewing the AD7853AR-REEL datasheet, AD7853AR-REEL pinout, AD7853AR-REEL application, or AD7853AR-REEL equivalent, this page delivers verified technical context, calibrated DC and dynamic performance specs, package-validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The AD7853AR-REEL integrates a track-and-hold amplifier with 500 ns acquisition time, a 12-bit SAR core, internal 2.5 V reference with ±20 ppm/°C tempco, and a programmable serial interface supporting five modes (including self-clocking). Its calibration architecture supports automatic power-up self-calibration and user-initiated system calibration for offset and gain errors within ±0.05 × VREF and ±0.025 × VREF spans respectively.
It operates in read-only mode by default but accepts 16-bit writes to control, status, and calibration registers via DIN/SCLK/SYNC. Power management includes full and partial power-down states, reducing IDD to 5 µA (clock off) or 10 µA (clock on), with typical normal-mode dissipation of 20 mW at 3.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic output and no missing codes across full temperature range. |
| Sampling Rate | 200 kSPS - enables real-time capture of signals up to 100 kHz Nyquist bandwidth without aliasing. |
| SINAD / SNR + Distortion | 71 dB min @ 10 kHz input - supports >11.5 ENOB for precision measurement applications. |
| Integral Nonlinearity | ±1 LSB max - ensures end-point linearity error remains within 1 least-significant bit over full scale. |
| Unipolar Offset Error | ±1 LSB max with 2.5 V external reference - eliminates need for external zero-adjust in unipolar 0–VREF configurations. |
| Power Dissipation | 20 mW max at 3.6 V - balances speed and efficiency for embedded systems with thermal constraints. |
| Reference Voltage | 2.5 V nominal, 1.2 V to VDD programmable - allows direct interfacing with low-voltage sensors or external precision references. |
Pinout & Package
AD7853AR-REEL is housed in a 24-lead small outline integrated circuit (SOIC) package with 0.3-inch body width and standard JEDEC MS-013AC footprint. Pin 1 is marked by a beveled corner; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST (1) | Convert Start Input | Edge-triggered command initiating track-to-hold transition and conversion; tied to DVDD if unused. |
| BUSY (2) | Conversion Status Output | Active-high open-drain signal indicating active conversion or calibration; used for handshaking in polled interfaces. |
| SLEEP (3) | Power-Down Control | Logic-low entry into low-power state retaining calibration data; reduces IDD to ≤10 µA with clock enabled. |
| REFIN/REFOUT (4) | Reference I/O | Provides 2.5 V internal reference or accepts external 1.2–VDD reference; requires CREF1/CREF2 decoupling caps. |
| AIN(+) (9), AIN(–) (10) | Pseudo-Differential Analog Inputs | Support unipolar (0 to VREF) or bipolar (±VREF/2) ranges selected by AMODE; input voltage limited to AGND–AVDD. |
| AMODE (11) | Analog Range Select | Logic-0 configures 0–VREF unipolar mode; logic-1 configures ±VREF/2 bipolar mode with AIN(–) bias requirement. |
| CAL (17) | Calibration Trigger | Rising-edge initiates full self-calibration; optional 10 nF capacitor to DGND enables auto-cal on power-up. |
| DIN/DOUT/SCLK/SYNC (20–23) | Serial Interface Signals | Configurable SPI-compatible port supporting master/slave, continuous/discontinuous clock, and polarity inversion via POLARITY. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibration on power-up | Eliminates manual calibration step during system startup; retains accuracy over temperature drift using on-chip DAC and memory. |
| Pseudo-differential input architecture | Rejects common-mode noise on AIN(+) and AIN(–) while enabling both unipolar and bipolar signal acquisition without external op-amps. |
| Flexible serial interface modes | Five selectable protocols (SPI/QSPI/8051/microprocessor) reduce host controller compatibility constraints and simplify firmware integration. |
| Low-power sleep with retained calibration | Reduces quiescent current to 5 µA (clock off) while preserving calibration coefficients-critical for intermittent-sampling battery systems. |
| On-chip 2.5 V reference with 20 ppm/°C tempco | Enables standalone operation without external reference IC; tempco supports <±0.5 LSB drift over –40°C to +85°C. |
Applications
| Portable Medical Instrumentation | Industrial Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG, blood pressure, or glucose sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary analog front-end digitizer with built-in reference and calibration, synchronized to low-power MCU via SPI. Use Value: 200 kSPS throughput captures transient physiological events; ±1 LSB INL ensures clinical-grade amplitude fidelity without post-processing correction. |
Use Scenario: Multi-channel voltage/current monitoring in remote environmental or factory-floor sensor nodes. IC Role / Device Role / Timing Role: Standalone ADC managing analog inputs from thermocouples, RTDs, and strain gauges under microcontroller supervision. Use Value: Self-calibration maintains long-term accuracy across temperature swings; 20 mW dissipation extends battery life in sealed enclosures. |
| High-Speed Modem Analog Front-End | Pen-Based Computing Interfaces |
|
Use Scenario: Digitizing baseband audio or IF signals in DSL/cable modem line cards requiring low THD and fast settling. IC Role / Device Role / Timing Role: High-fidelity sampling stage preceding digital signal processing; driven by precise master clock (CLKIN). Use Value: –78 dB THD and 71 dB SINAD meet ITU-T G.992.x spectral purity requirements; 500 ns acquisition supports tight timing margins. |
Use Scenario: Converting stylus position and pressure signals in tablet PCs or signature-capture pads. IC Role / Device Role / Timing Role: Low-latency analog digitizer interfaced directly to touch controller ASIC via synchronous serial bus. Use Value: Read-only default mode simplifies initialization; SLEEP pin enables instantaneous power gating between pen strokes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7853LAR-REEL | 100 kSPS max rate, 6.85 mW typical power at 3.6 V (vs. 20 mW), identical pinout and register map. | Better suited for ultra-low-power, lower-throughput systems where 100 kSPS suffices and thermal budget is critical. | Select AD7853LAR-REEL when average sampling interval exceeds 10 µs and sleep-mode duty cycle dominates. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, no on-chip reference, requires external 2.5 V ref; 8-pin SOIC package. | Lacks self-calibration and system-calibration capability; simpler interface but demands external reference design and calibration routine. | Choose ADS7822U only when board space is constrained and reference/calibration are already handled elsewhere in the signal chain. |
Compared with AD7853LAR-REEL and ADS7822U, the AD7853AR-REEL uniquely combines 200 kSPS speed, integrated 2.5 V reference, and auto-calibration in a 24-pin SOIC-making it optimal for designs needing guaranteed accuracy without reference or calibration overhead.
Availability
AD7853AR-REEL is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial data loggers, and high-speed modem analog front-ends requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7853AR-REEL 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7853 family was designed specifically for portable, low-power, high-accuracy data acquisition systems requiring integrated reference, calibration, and flexible serial interfacing-targeting instrumentation, medical, and communications markets.
FAQ
What is the maximum sampling rate supported by the AD7853AR-REEL?
The AD7853AR-REEL supports a maximum throughput rate of 200 kSPS under specified conditions: AVDD = DVDD = 3.0 V to 5.5 V, fCLKIN = 4 MHz, and TA = –40°C to +85°C. This rate is achieved using the internal master clock and valid across all supported analog input ranges and serial interface modes. The AD7853AR-REEL maintains this performance while delivering ±1 LSB integral nonlinearity and 71 dB SINAD.
Does the AD7853AR-REEL require an external reference voltage?
No-the AD7853AR-REEL includes an internal 2.5 V reference with ±20 ppm/°C tempco, enabling fully self-contained operation. However, the REFIN/REFOUT pin accepts external references from 1.2 V to VDD, allowing higher precision or custom voltage scaling. When using the internal reference, external capacitors CREF1 (0.1 µF) and CREF2 (0.01 µF) must be connected to AGND per the AD7853AR-REEL datasheet layout guidelines.
How does the AD7853AR-REEL handle calibration during power-up?
The AD7853AR-REEL supports automatic self-calibration on power-up when a 10 nF capacitor is connected from the CAL pin to DGND. This triggers a full calibration sequence upon rising edge of CAL after power stabilization, correcting offset and gain errors within ±0.05 × VREF and ±0.025 × VREF spans. Calibration coefficients are stored in on-chip memory and retained during SLEEP mode, ensuring accuracy without host intervention.
Can the AD7853AR-REEL operate in a read-only configuration without writing to registers?
Yes-the AD7853AR-REEL powers up in read-only mode by default, requiring no register writes to perform conversions. In this mode, CONVST initiates sampling, BUSY indicates completion, and DOUT streams 16-bit results via SPI-compatible timing. DIN should be tied to DGND. Full functionality-including software-controlled conversion start, power-down, and calibration-is accessible only when writing to the control register, but is not required for basic operation.
What package type and lead count does the AD7853AR-REEL use?
The AD7853AR-REEL uses a 24-lead small outline integrated circuit (SOIC) package with 0.3-inch body width and standard JEDEC MS-013AC footprint. It shares pinout and mechanical dimensions with the AD7853AN (DIP) and AD7853ARS (SSOP) variants, enabling drop-in replacement across package types when board layout permits. The "R" in the part number explicitly denotes the SOIC variant.
AD7853AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7853AR-REEL FAQ
1.How can I place an order for AD7853AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7853AR-REEL 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 AD7853AR-REEL reliable?
The price and inventory of AD7853AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7853AR-REEL is usually 5 days.
3.What payment methods are accepted for AD7853AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7853AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7853AR-REEL?
AD7853AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7853AR-REEL 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 AD7853AR-REEL?
For technical support, including AD7853AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7853AR-REEL requirements.
6.How does Aetrix verify that AD7853AR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7853AR-REEL 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 AD7853AR-REEL meets industry standards.
7.What is the process for return or replacement of AD7853AR-REEL?
All AD7853AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7853AR-REEL, 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 AD7853AR-REEL part is unused and in its original packaging.
Return procedure for AD7853AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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