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Analog Devices Inc. AD7853LBR-REEL
- Part No.:
- AD7853LBR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7853LBR-REEL.pdf
- Description:
- IC ADC 12BIT SRL 200KSPS 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
AD7853LBR-REEL from Analog Devices is a 12-bit, pseudo-differential successive approximation register (SAR) analog-to-digital converter optimized for low-power operation at up to 100 kSPS. It operates from a single 3 V to 5.5 V supply, features on-chip 2.5 V reference, system/self-calibration, and flexible SPI/QSPI/μP-compatible serial interface. Used in battery-powered medical instruments and portable data acquisition systems requiring precision and energy efficiency.
For engineers reviewing the AD7853LBR-REEL datasheet, AD7853LBR-REEL pinout, AD7853LBR-REEL application, or AD7853LBR-REEL equivalent, key selection criteria include its 100 kSPS throughput, 4.5 mW typical power dissipation at 3 V, ±1 LSB integral nonlinearity, 24-lead SOIC package, and support for unipolar/bipolar input ranges with external or internal reference.
Technical Context
The AD7853LBR-REEL implements a track-and-hold amplifier with 500 ns acquisition time and a SAR ADC core with charge redistribution DAC. Calibration logic supports automatic power-up self-calibration and user-initiated system calibration via the CAL pin or control register.
Its serial interface supports five modes (selected by SM1/SM2), including external-clock and self-clocking configurations, with SCLK polarity controlled by the POLARITY pin. The device retains calibration data during sleep mode and supports full or partial power-down via control register bits PMGT1/PMGT0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step for precise signal digitization |
| Throughput Rate | 100 kSPS - enables real-time sampling of baseband signals up to ~40 kHz Nyquist bandwidth |
| INL | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale linearity error over temperature |
| Power Dissipation | 4.5 mW typical at 3 V - supports >100 hr operation on coin-cell batteries in portable instrumentation |
| Reference | Internal 2.5 V ±20 ppm/°C - eliminates need for external reference in cost-sensitive designs |
| Input Range | 0 to VREF (unipolar) or ±VREF/2 (bipolar) - accommodates both single-ended and differential sensor outputs |
| Supply Range | 3.0 V to 5.5 V - interoperable with Li-ion, 3.3 V logic, and 5 V legacy systems without level-shifting |
Pinout & Package
AD7853LBR-REEL is housed in a 24-lead small outline integrated circuit (SOIC) package with 0.3-inch width and standard JEDEC MS-013 footprint. Pin 1 is marked by a notch or dot; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start input | Rising-edge-triggered command to latch analog input and initiate conversion; tied high if unused |
| BUSY | Conversion status output | Active-high open-drain signal indicating conversion/calibration in progress; used for handshaking |
| SLEEP | Low-power mode control | Logic 0 powers down all circuitry except calibration memory; retains settings across sleep cycles |
| REFIN/REFOUT | Reference I/O | Provides 2.5 V internal reference or accepts external 1.2–VDD reference; requires CREF1/CREF2 decoupling |
| AIN(+), AIN(–) | Pseudo-differential analog inputs | Support unipolar (0 to VREF) or bipolar (±VREF/2) ranges; AIN(–) biasing required for bipolar mode |
| DIN/DOUT/SCLK/SYNC | Serial interface signals | Configurable SPI-compatible port supporting master/slave, clock polarity, and frame sync modes |
| AMODE, POLARITY, SM1, SM2 | Interface configuration inputs | Hardware-selectable modes for input range, clock edge, and serial protocol (SPI/QSPI/μP) |
| AGND, DGND | Analog/digital ground returns | Separate ground planes required to minimize digital noise coupling into analog path |
Key Features
| Feature | Design Value |
|---|---|
| Autocalibration on power-up | Eliminates manual calibration step during system boot; ensures ±1 LSB INL without host intervention |
| Flexible power management | Three states: normal (4.5 mW), partial power-down (400 µA), full power-down (5 µA) - selectable via control register |
| Pseudo-differential input architecture | Rejects common-mode noise on AIN(+)/AIN(–) pair while enabling single-ended sensor interfacing |
| Wide reference voltage range | Accepts 1.2 V to VDD externally - allows optimization of dynamic range for low-voltage sensors |
| Read-only default operation | Functions as standalone ADC without firmware overhead; DIN tied to DGND suffices for basic use |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG or blood oxygen analog waveforms in handheld patient monitors. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing conditioned biopotential signals at 100 kSPS with 12-bit resolution. Use Value: 4.5 mW power enables >12-hour battery life; built-in 2.5 V reference reduces BOM count by one component. |
Use Scenario: Multi-channel voltage/current monitoring in remote environmental sensor nodes deployed for months. IC Role / Device Role / Timing Role: Low-power ADC capturing thermocouple, RTD, or strain gauge outputs with periodic wake-up. Use Value: Sleep mode current of 5 µA extends shelf life; system calibration compensates for long-term drift in field-deployed units. |
| Pen-Based Computing Interfaces | High-Speed Modem Analog Front Ends |
|
Use Scenario: Digitizing stylus pressure and position signals in tablet PCs with active digitizers. IC Role / Device Role / Timing Role: High-speed sampling ADC synchronized to touch controller timing for sub-millisecond latency. Use Value: 500 ns track/hold acquisition supports rapid channel switching across multiple pen-sensing electrodes. |
Use Scenario: Baseband signal conditioning in 56 kbps modem designs requiring precise analog signal reconstruction. IC Role / Device Role / Timing Role: ADC in receive path converting filtered analog line signals prior to DSP demodulation. Use Value: 71 dB SNR + distortion ensures clean digitization of weak incoming signals above noise floor. |
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 |
|---|---|---|---|
| AD7476AARMZ-REEL | 12-bit, 1 MSPS, no internal reference, 6-pin SOT-23 package | Higher speed but requires external reference and lacks calibration; suited for space-constrained, high-throughput apps | Select when sampling rate >100 kSPS is critical and board area is limited; not drop-in due to missing REFOUT/AMODE/CAL pins |
| ADS7822U | 12-bit, 200 kSPS, 3 V only, no internal reference, 8-pin SOIC | Higher throughput at 3 V, but no self-calibration and narrower supply range; requires external 2.5 V reference | Choose for cost-sensitive 3 V systems where calibration is handled externally; pinout and serial protocol differ significantly |
Compared with AD7853LBR-REEL, AD7476AARMZ-REEL trades integrated calibration and reference for speed and size, while ADS7822U offers higher throughput at 3 V but increases BOM complexity and removes autonomous calibration capability.
Availability
AD7853LBR-REEL is available at Aetrix Electronics and suitable for battery-powered medical instruments, industrial data loggers, and portable human interface devices requiring stable component supply and long-lifecycle support.
Supply support for AD7853LBR-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7853L series belongs to Analog Devices' precision SAR ADC product line, designed specifically for portable and low-power measurement systems where accuracy, autonomy, and supply flexibility are critical.
FAQ
What is the maximum sampling rate supported by the AD7853LBR-REEL?
The AD7853LBR-REEL supports a maximum throughput rate of 100 kSPS under specified conditions (1 MHz master clock, –40°C to +85°C). This is fixed by its internal architecture and lower than the AD7853's 200 kSPS rating, reflecting its low-power optimization. The conversion time is 10 µs maximum, and acquisition time is guaranteed at 500 ns.
Does the AD7853LBR-REEL require an external reference voltage?
No - the AD7853LBR-REEL includes an internal 2.5 V reference with ±20 ppm/°C tempco, accessible at the REFIN/REFOUT pin. It can also accept external references from 1.2 V to AVDD. When using the internal reference, external capacitors CREF1 (0.1 µF) and CREF2 (0.01 µF) must be connected to AGND per the datasheet layout guidelines.
How does the AD7853LBR-REEL handle calibration?
The AD7853LBR-REEL supports both automatic self-calibration on power-up (via 10 nF capacitor on CAL pin) and user-initiated system calibration (via rising edge on CAL or control register write). Calibration adjusts offset and gain errors within defined spans: ±0.05 × VREF for offset and ±0.025 × VREF for full-scale. Calibration data is retained in sleep mode.
What serial interface protocols does the AD7853LBR-REEL support?
The AD7853LBR-REEL supports five hardware-configurable serial interface modes selected by SM1/SM2 pins, compatible with 8051, SPI, QSPI, and generic microprocessor buses. It supports both external clocking (SCLK input) and self-clocking (SCLK output), with polarity set by the POLARITY pin. No software driver customization is needed for standard SPI read/write sequences.
Is the AD7853LBR-REEL pin-compatible with other variants in the AD7853 family?
Yes - the AD7853LBR-REEL shares identical 24-lead SOIC pinout and function mapping with AD7853AR, AD7853BR, and AD7853LAR. Differences are internal (speed grade, power profile, INL spec), not pin-level. All share identical CONVST timing, BUSY behavior, serial interface pin assignments, and calibration pin functionality.
AD7853LBR-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):
- 100k
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7853LBR-REEL FAQ
1.How can I place an order for AD7853LBR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7853LBR-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 AD7853LBR-REEL reliable?
The price and inventory of AD7853LBR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7853LBR-REEL is usually 5 days.
3.What payment methods are accepted for AD7853LBR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7853LBR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7853LBR-REEL?
AD7853LBR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7853LBR-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 AD7853LBR-REEL?
For technical support, including AD7853LBR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7853LBR-REEL requirements.
6.How does Aetrix verify that AD7853LBR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7853LBR-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 AD7853LBR-REEL meets industry standards.
7.What is the process for return or replacement of AD7853LBR-REEL?
All AD7853LBR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7853LBR-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 AD7853LBR-REEL part is unused and in its original packaging.
Return procedure for AD7853LBR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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