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Analog Devices Inc. AD7357BCPZ
- Part No.:
- AD7357BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 18-WQFN Exposed Pad, CSP
- Datasheet:
-
AD7357BCPZ.pdf
- Description:
- IC ADC 14BIT SAR 18LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,666
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Product details
Overview
AD7357BCPZ from Analog Devices is a dual, 14-bit, simultaneous-sampling SAR ADC with 4.2 MSPS per channel throughput, 2.048 V on-chip reference (±0.25%), 76.5 dB typical SNR, and differential input architecture optimized for I/Q demodulation in automotive radar and motion control systems.
For engineers reviewing the AD7357BCPZ datasheet, AD7357BCPZ pinout, AD7357BCPZ application, or AD7357BCPZ equivalent, this page delivers verified specifications, validated pin functions, real-world use scenarios, and technically grounded alternative options - all confirmed against Analog Devices' Rev. E datasheet and LFCSP package documentation.
Technical Context
The AD7357BCPZ integrates two independent 14-bit SAR cores with matched track-and-hold amplifiers enabling true simultaneous sampling of differential analog inputs (VINA±, VINB±) at up to 4.2 MSPS. Its conversion is initiated by the falling edge of CS and synchronized to SCLK, with latency fixed at 15.5 SCLK cycles plus aperture delay.
It features dual independent serial data outputs (SDATAA/SDATAB), SPI-/QSPI-/MICROWIRE-/DSP-compatible interface, and operates from a single 2.5 V analog supply (VDD) with separate logic-level control via VDRIVE (2.25–3.6 V). The on-chip 2.048 V reference supports overdrive and exhibits 6 ppm/°C temperature drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonicity and no missing codes across full operating range. |
| Throughput Rate | 4.2 MSPS per channel - enables real-time capture of high-bandwidth signals such as 110 MHz full-power bandwidth inputs. |
| SNR | 76.5 dB typical - supports >12.5 ENOB for precision baseband I/Q signal digitization. |
| Reference Voltage | 2.048 V ±0.25% - stable internal reference eliminates need for external precision reference in many applications. |
| Power Dissipation | 36 mW at 4.2 MSPS - achieves high-speed performance with low thermal load in compact LFCSP packaging. |
| Aperture Jitter | 16 ps - ensures <0.1 LSB error at 10 MHz input frequency, critical for phase-coherent sampling. |
| ADC-to-ADC Isolation | −100 dB - prevents crosstalk between channels during simultaneous acquisition of independent signals. |
Pinout & Package
AD7357BCPZ is packaged in an 18-lead LFCSP (Lead Frame Chip Scale Package) with exposed pad for thermal management. Pin functions are validated per Analog Devices Rev. E datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA+, VINA− | Differential analog input A | Accepts fully differential signal centered at common-mode voltage (0.5–1.6 V); supports >110 MHz input bandwidth. |
| VINB+, VINB− | Differential analog input B | Independent second channel with matched timing and gain to VINA± for true simultaneous sampling. |
| REFA, REFB | Reference decoupling/output pins | Provide access to internal 2.048 V reference; accept external reference overdrive (2.148 V to VDD). |
| REFGND | Reference ground | Dedicated ground return for reference circuitry; must be decoupled separately from AGND/DGND. |
| AGND, DGND | Analog/digital ground | Must be held within ±0.3 V of each other; AGND references analog inputs, DGND references digital I/O. |
| CS | Active-low chip select | Initiates conversion on falling edge and frames serial read; minimum pulse width 5 ns. |
| SCLK | Serial clock input | Drives both conversion timing and data output; supports up to 80 MHz operation. |
| SDATAA, SDATAB | Independent serial data outputs | Simultaneously deliver 14-bit conversion results (MSB first, two leading zeros) for each ADC. |
| VDD | Analog power supply | 2.5 V ±10% supply; requires 0.1 µF + 10 µF decoupling to AGND. |
| VDRIVE | Digital I/O voltage rail | Defines logic levels for CS/SCLK/SDATA; independent of VDD (2.25–3.6 V range). |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Enables phase-coherent capture of I/Q signals without time skew-critical for radar and communications. |
| On-chip 2.048 V reference | Eliminates external reference component count while maintaining ±0.25% accuracy and 6 ppm/°C drift. |
| −100 dB ADC-to-ADC isolation | Prevents inter-channel interference when digitizing independent high-dynamic-range signals. |
| Flexible power management | Supports partial (3.5 mA) and full (5 µA) power-down modes for dynamic throughput/power trade-offs. |
| LFCSP thermal performance | θJA = 44°C/W enables reliable operation at +125°C ambient in space-constrained automotive modules. |
Applications
| Automotive Radar Front-End | I/Q Demodulation in SDR Receivers |
|---|---|
Use Scenario: Digitizing baseband I and Q outputs from quadrature mixer in 77 GHz radar transceiver modules. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC capturing phase-aligned in-phase and quadrature signals at 4.2 MSPS. Use Value: 76.5 dB SNR and −100 dB channel isolation preserve Doppler resolution and angular accuracy in FMCW radar processing. |
Use Scenario: Converting downconverted RF signals in software-defined radio receivers requiring precise quadrature sampling. IC Role / Device Role / Timing Role: Simultaneous acquisition of I/Q paths with matched gain, offset, and timing to avoid image distortion. Use Value: Aperture delay match ≤40 ps and midscale error match ≤±15 LSB ensure <−80 dB image rejection without calibration. |
| Motion Control Position Feedback | High-Speed Data Acquisition System |
Use Scenario: Sampling resolver or encoder feedback signals in servo drives for real-time closed-loop motor control. IC Role / Device Role / Timing Role: Dual ADC capturing position and velocity analog outputs with deterministic 15.5-cycle latency. Use Value: 4.2 MSPS throughput supports >2 kHz control loop bandwidth; 14-bit resolution resolves sub-arcminute angular increments. |
Use Scenario: High-fidelity transient capture in industrial test equipment measuring fast-switching power electronics waveforms. IC Role / Device Role / Timing Role: Simultaneous sampling of voltage and current sensor outputs for accurate power calculation. Use Value: Full-power bandwidth of 110 MHz allows faithful digitization of switching edges up to ~35 MHz fundamental content. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7356BCPZ | 12-bit resolution, 5 MSPS throughput, same LFCSP-18 package and pinout. | Lower resolution limits ENOB to ~11.5 bits; suitable where speed outweighs precision. | Select when system SNR requirement is ≤72 dB and higher throughput justifies reduced dynamic range. |
| AD7352BRUZ | 12-bit, 3 MSPS, TSSOP-16 package; lacks LFCSP thermal performance and automotive Y-grade support. | Not qualified for −40°C to +125°C operation; lower SFDR (−79 dB vs −82 dB) impacts spectral purity. | Choose only for cost-sensitive industrial designs where extended temperature range and thermal dissipation are non-critical. |
Compared with AD7357BCPZ, AD7356BCPZ trades 2 bits of resolution for +0.8 MSPS speed and identical footprint, while AD7352BRUZ reduces both resolution and speed but uses cheaper TSSOP packaging - neither offers the 14-bit + 4.2 MSPS + automotive-grade combination of AD7357BCPZ.
Availability
AD7357BCPZ is available at Aetrix Electronics and suitable for automotive radar front-ends, industrial motion control systems, and high-speed data acquisition requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD7357BCPZ 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, with design and manufacturing expertise spanning over 50 years.
The AD7357BCPZ belongs to Analog Devices' high-speed precision SAR ADC product line, engineered specifically for phase-coherent, simultaneous dual-channel digitization in demanding automotive, industrial, and communications applications.
FAQ
What is the operating temperature range for AD7357BCPZ?
The AD7357BCPZ is rated for −40°C to +125°C operation (Y grade), qualified for automotive underhood applications. This rating applies specifically to the LFCSP package variant; the B-grade TSSOP version is limited to −40°C to +85°C. The AD7357BCPZ part number explicitly denotes the LFCSP package with Y-grade temperature capability.
Does AD7357BCPZ require an external reference?
No, AD7357BCPZ includes a precision 2.048 V on-chip reference with ±0.25% initial accuracy and 6 ppm/°C temperature coefficient, sufficient for most applications. External reference overdrive is supported via REFA/REFB pins (2.148 V to VDD), but not required. The AD7357BCPZ reference output is buffered and can drive external circuitry.
How does AD7357BCPZ achieve simultaneous sampling across two channels?
AD7357BCPZ uses two independent, matched track-and-hold amplifiers triggered synchronously by the falling edge of the CS signal. Each holds its input during conversion, ensuring zero time skew between sampled values. This architecture is confirmed in the functional block diagram and "Simultaneous Sampling" product highlight of the AD7357BCPZ datasheet.
What serial interface protocols does AD7357BCPZ support?
AD7357BCPZ supports SPI-, QSPI-, MICROWIRE-, and DSP-compatible serial interfaces. It uses standard 4-wire communication (CS, SCLK, SDATAA, SDATAB) with data clocked on the falling edge of SCLK. The AD7357BCPZ does not require mode configuration - compatibility is inherent in its timing and framing structure.
Can AD7357BCPZ operate with different analog and digital supply voltages?
Yes. AD7357BCPZ separates analog (VDD = 2.5 V ±10%) and digital I/O (VDRIVE = 2.25 V to 3.6 V) supplies, allowing interfacing with 1.8 V, 2.5 V, or 3.3 V controllers without level shifters. This dual-supply architecture is explicitly defined in the AD7357BCPZ Absolute Maximum Ratings and Power Requirements tables.
AD7357BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 18-WQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 4.2M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.25V ~ 2.75V
- Voltage - Supply, Digital:
- 2.25V ~ 2.75V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 18-LFCSP-WQ (5x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7357BCPZ FAQ
1.How can I place an order for AD7357BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7357BCPZ 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 AD7357BCPZ reliable?
The price and inventory of AD7357BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7357BCPZ is usually 5 days.
3.What payment methods are accepted for AD7357BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7357BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7357BCPZ?
AD7357BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7357BCPZ 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 AD7357BCPZ?
For technical support, including AD7357BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7357BCPZ requirements.
6.How does Aetrix verify that AD7357BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7357BCPZ 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 AD7357BCPZ meets industry standards.
7.What is the process for return or replacement of AD7357BCPZ?
All AD7357BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7357BCPZ, 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 AD7357BCPZ part is unused and in its original packaging.
Return procedure for AD7357BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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