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Analog Devices Inc. AD7853ARS-REEL
- Part No.:
- AD7853ARS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7853ARS-REEL.pdf
- Description:
- IC ADC 12BIT SRL 200KSPS 24-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
AD7853ARS-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, and flexible SPI/QSPI/8051-compatible serial interface. Designed for battery-powered instrumentation, it delivers ±1 LSB integral nonlinearity, 70 dB SNR at 10 kHz input, and 4.6 µs conversion time.
For engineers reviewing the AD7853ARS-REEL datasheet, AD7853ARS-REEL pinout, AD7853ARS-REEL application, or AD7853ARS-REEL equivalent, key selection criteria include unipolar/bipolar input range configuration via AMODE, automatic power-down after conversion (1.15 mW typical in sleep mode), calibration timing dependency on CLKIN (4 MHz), and SSOP-24 package compatibility with space-constrained portable systems.
Technical Context
The AD7853ARS-REEL implements a charge redistribution DAC-based SAR architecture with integrated track-and-hold acquiring signals in 500 ns. Its analog front end supports pseudo-differential inputs (AIN(+) and AIN(–)) with selectable 0 to VREF (unipolar) or ±VREF/2 (bipolar) ranges via the AMODE pin.
Digital control uses a 16-bit serial interface configurable across five modes (SM1/SM2), supporting external clocking (SCLK input) or self-clocking (SCLK output), with polarity controlled by POLARITY. Calibration logic includes on-chip memory for offset/gain coefficients and supports full self-calibration (31.25 ms typical at 4 MHz CLKIN) and system-level calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale for precise sensor digitization |
| Sampling Rate | 200 kSPS - enables real-time capture of signals up to 100 kHz Nyquist bandwidth |
| INL | ±1 LSB max - ensures monotonicity and <0.025% end-point linearity error over temperature |
| SNR | 70 dB min at 10 kHz - supports >11.3 effective bits for clean signal acquisition |
| Supply Range | 3.0 V to 5.5 V - allows direct integration with Li-ion (3.3 V/3.6 V) or 5 V legacy systems |
| Power Dissipation | 20 mW max at 5.5 V - enables continuous operation in thermally constrained handheld devices |
| Reference | Internal 2.5 V ±20 ppm/°C - eliminates external reference component while maintaining stability |
| Acquisition Time | 500 ns - permits high-speed multiplexed sampling without hold-time bottlenecks |
Pinout & Package
AD7853ARS-REEL is housed in a 24-lead SSOP (Shrink Small Outline Package) with 0.64 mm pitch, 7.6 mm × 5.3 mm body size, and exposed pad not present. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Edge-triggered command initiating track-to-hold transition and conversion sequence |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating active conversion or calibration |
| SLEEP | Power Management Input | Logic 0 enables full power-down (5 µA max), retaining calibration data |
| REFIN/REFOUT | Reference I/O | Provides internal 2.5 V reference or accepts external 1.2 V–VDD reference source |
| AIN(+), AIN(–) | Pseudo-Differential Analog Inputs | Support unipolar (0 to VREF) or bipolar (±VREF/2) input ranges per AMODE setting |
| AMODE | Analog Range Select | Logic 0 = unipolar; Logic 1 = bipolar - configures input voltage interpretation |
| SCLK, DIN, DOUT, SYNC | Serial Interface Signals | Configurable SPI-compatible port supporting master/slave, clock polarity, and frame sync modes |
| CLKIN | Master Clock Input | 4 MHz nominal clock setting conversion timing (tCONVERT = 4.6 µs) and calibration duration |
| AGND, DGND | Analog/Digital Grounds | Separate ground returns minimize noise coupling between precision analog and noisy digital domains |
| CREF1, CREF2 | Reference Decoupling Terminals | Require 0.1 µF and 0.01 µF ceramic capacitors to AGND for DAC charge stability |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibration on power-up | Eliminates manual calibration step during system startup using internal capacitor-based offset/gain correction |
| Flexible serial interface modes | Five programmable configurations (SM1/SM2) support SPI, QSPI, 8051, and microprocessor bus timing requirements |
| Pseudo-differential input architecture | Rejects common-mode noise on AIN(–) while enabling single-ended or differential signal routing |
| Low-power sleep mode | Reduces current draw to 5 µA (external clock off) without losing calibration coefficients or register state |
| On-chip 2.5 V reference | Provides stable reference with 20 ppm/°C drift, removing need for external precision reference IC |
| System calibration support | Enables field adjustment of gain/offset errors introduced by external signal conditioning circuitry |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG or blood pressure sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary analog-to-digital converter capturing conditioned biopotential signals at 100–200 Hz with low noise and calibrated accuracy. Use Value: ±1 LSB INL and 70 dB SNR ensure clinical-grade waveform fidelity; 3 V operation extends battery life beyond 24 hours. |
Use Scenario: Multi-channel environmental monitoring (temperature, humidity, light) in remote field sensors. IC Role / Device Role / Timing Role: Low-power ADC interfacing with microcontroller via SPI to digitize sensor outputs at scheduled intervals. Use Value: Automatic power-down between conversions reduces average current to <10 µA; internal reference eliminates BOM cost and layout area. |
| Industrial Control Loop Sensors | High-Speed Modem Analog Front Ends |
Use Scenario: Real-time feedback sampling in PLC analog input modules measuring 4–20 mA transducer outputs. IC Role / Device Role / Timing Role: Precision ADC performing system calibration against known reference to compensate for PCB trace resistance and op-amp drift. Use Value: System calibration span (±0.05 × VREF offset, ±0.025 × VREF gain) corrects for up to 125 mV total error in signal chain. |
Use Scenario: Digitizing baseband analog signals in 56 kbps modem designs requiring fast settling and low distortion. IC Role / Device Role / Timing Role: High-speed SAR ADC capturing 10 kHz sine waves with –78 dB THD for clean spectral reconstruction. Use Value: 500 ns acquisition time and 200 kSPS throughput meet V.90/V.34 symbol rate timing constraints without external sample-hold. |
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 |
|---|---|---|---|
| AD7853BR | Same core architecture and pinout; SOIC-24 package instead of SSOP-24; identical 200 kSPS speed and ±1 LSB INL | Requires larger PCB footprint; better thermal dissipation (θJA = 75°C/W vs. 115°C/W) but less suitable for ultra-compact layouts | Select when board space permits larger package and higher thermal margin is prioritized over miniaturization |
| ADS7822U | 12-bit, 200 kSPS SAR ADC with internal reference; differs in serial interface (3-wire only, no SM1/SM2 mode select) and lacks system calibration capability | Cannot perform system-level gain/offset correction; requires external reference for bipolar operation; simpler interface reduces firmware overhead | Select when calibration is handled externally and minimal GPIO count is critical for microcontroller resource-constrained designs |
Compared with AD7853BR and ADS7822U, the AD7853ARS-REEL uniquely combines SSOP-24 miniaturization, on-chip system calibration support, and multi-mode SPI compatibility-making it optimal for space-limited, field-calibratable portable instrumentation where long-term accuracy drift must be actively managed.
Availability
AD7853ARS-REEL is available at Aetrix Electronics and suitable for battery-powered medical instruments, industrial data loggers, and high-speed modem analog front ends requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for AD7853ARS-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 Wilmington, MA.
The AD7853ARS-REEL belongs to Analog Devices' precision SAR ADC product line, engineered for portable and low-power measurement systems demanding calibrated accuracy, small footprint, and single-supply operation without performance compromise.
FAQ
What is the maximum sampling rate supported by the AD7853ARS-REEL?
The AD7853ARS-REEL supports a maximum sampling rate of 200 kSPS, achieved with a 4 MHz master clock (CLKIN). Conversion time is fixed at 4.6 µs, and the device maintains this throughput under specified conditions: AVDD/DVDD = 3.0 V to 5.5 V, REFIN/REFOUT = 2.5 V external reference, and TA = –40°C to +85°C. The AD7853ARS-REEL datasheet confirms this value in the CONVERSION RATE section.
Does the AD7853ARS-REEL require external reference components?
The AD7853ARS-REEL integrates a 2.5 V internal reference with 20 ppm/°C temperature coefficient and can operate without external reference components. However, it requires two external decoupling capacitors: 0.1 µF (CREF1) and 0.01 µF (CREF2), both connected to AGND. An external reference may be applied via REFIN/REFOUT if tighter accuracy or different voltage levels (1.2 V to VDD) are needed.
How does the AMODE pin affect analog input configuration on the AD7853ARS-REEL?
The AMODE pin selects the analog input range mode: Logic 0 configures unipolar operation (0 to VREF), where AIN(+) must remain ≥ AIN(–); Logic 1 configures bipolar operation (±VREF/2), requiring AIN(–) to be biased at +VREF/2. This setting directly determines transfer function coding (straight binary vs. twos complement) and allowable input voltage boundaries per the AD7853ARS-REEL functional description.
Can the AD7853ARS-REEL perform system-level calibration?
Yes, the AD7853ARS-REEL supports both self-calibration and system calibration. System calibration corrects for external gain and offset errors introduced by signal conditioning circuitry. The AD7853ARS-REEL specifies offset calibration span of ±0.05 × VREF and gain calibration span of +1.025 × VREF/–0.975 × VREF, enabling compensation of up to ±125 mV offset and ±25 mV full-scale error in the analog signal path.
What package type is used for the AD7853ARS-REEL?
The AD7853ARS-REEL is supplied in a 24-lead SSOP (Shrink Small Outline Package) with 0.64 mm lead pitch and 7.6 mm × 5.3 mm body dimensions. This package is explicitly identified in the Ordering Guide as "RS-24", and the Pin Configurations diagram confirms SSOP-compatible pin layout and top-view marking convention.
AD7853ARS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 2
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7853ARS-REEL FAQ
1.How can I place an order for AD7853ARS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7853ARS-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 AD7853ARS-REEL reliable?
The price and inventory of AD7853ARS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7853ARS-REEL is usually 5 days.
3.What payment methods are accepted for AD7853ARS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7853ARS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7853ARS-REEL?
AD7853ARS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7853ARS-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 AD7853ARS-REEL?
For technical support, including AD7853ARS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7853ARS-REEL requirements.
6.How does Aetrix verify that AD7853ARS-REEL is sourced from the original manufacturer or authorized distributors?
All AD7853ARS-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 AD7853ARS-REEL meets industry standards.
7.What is the process for return or replacement of AD7853ARS-REEL?
All AD7853ARS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7853ARS-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 AD7853ARS-REEL part is unused and in its original packaging.
Return procedure for AD7853ARS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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