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Analog Devices Inc. AD9235BCP-40
- Part No.:
- AD9235BCP-40
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9235BCP-40.pdf
- Description:
- 12-BIT ADC, PARALLEL WORD ACCESS
- Quantity:
- Payment:
- Shipping:
Inventory:3,877
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Product details
Overview
AD9235BCP-40 from Analog Devices is a 12-bit, 40 MSPS monolithic analog-to-digital converter (ADC) operating from a single 3 V supply (2.7 V to 3.6 V). It features a differential sample-and-hold amplifier with 500 MHz input bandwidth, on-chip reference, and clock duty cycle stabilizer-enabling high-fidelity IF sampling in communications receivers and ultrasound front-ends.
For engineers reviewing the AD9235BCP-40 datasheet, AD9235BCP-40 pinout, AD9235BCP-40 application, or AD9235BCP-40 equivalent, this page delivers verified specifications including SNR = 70.4 dBc at Nyquist, DNL = ±0.35 LSB, 28-lead TSSOP package, and confirmed functional compatibility with AD9214-65 for 10-bit-to-12-bit system upgrades.
Technical Context
The AD9235BCP-40 implements a multistage 1½-bit differential pipelined architecture with output error correction logic, guaranteeing no missing codes over –40°C to +85°C. Its SHA supports user-selectable 1 Vp-p or 2 Vp-p differential input ranges and operates up to 100 MHz input frequency while maintaining 70.4 dBc SNR at 40 MSPS.
A dedicated clock duty cycle stabilizer (DCS) is disabled in the -40 variant per datasheet Table 3 footnote, distinguishing it from the -65 model. Digital outputs are configurable as offset binary or twos complement, driven by a separate DRVDD supply (2.25 V to 3.6 V) for 2.5 V/3.3 V logic interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct digital codes with no missing codes across full temperature range. |
| Sampling Rate | 40 MSPS - supports Nyquist-limited signal capture up to 20 MHz without aliasing in baseband applications. |
| SNR @ Nyquist | 70.4 dBc - enables >11.4 ENOB for high-fidelity digitization of IF signals in CDMA-One and IS-95 receivers. |
| SFDR @ Nyquist | 85 dBc - suppresses spurious components sufficiently for demanding spectral purity requirements in medical ultrasound beamforming. |
| Power Consumption | 165 mW DC input - low power enables integration into battery-powered scopemeters and handheld diagnostic instruments. |
| Analog Input Bandwidth | 500 MHz - allows wideband sampling of fast-rising transients and multi-carrier signals without external amplification. |
| Differential Nonlinearity | ±0.35 LSB - ensures monotonic transfer function critical for closed-loop control and precision measurement systems. |
Pinout & Package
The AD9235BCP-40 is packaged in a 28-lead TSSOP (Thin Shrink Small Outline Package) with exposed pad, optimized for thermal performance in industrial environments (–40°C to +85°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended CMOS/TTL-compatible input controlling all conversion cycles; requires no external duty cycle correction for -40 variant. |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) inputs accepting 1 Vp-p or 2 Vp-p differential signals; internally terminated to AGND via 7 pF capacitance. |
| AVDD, AGND | Analog Power/Ground | 3 V analog supply (2.7–3.6 V) with dedicated ground plane; decoupling required to maintain SNR performance. |
| DRVDD, DGND | Digital Output Driver Supply | Separate 2.5 V or 3.3 V supply for data outputs; isolates digital switching noise from analog section. |
| D0–D11 | Parallel Digital Outputs | 12-bit parallel CMOS outputs in offset binary or twos complement format; pipeline latency = 7 cycles. |
| OTR | Out-of-Range Indicator | Active-high flag signaling overflow beyond selected input range; used with MSB to distinguish high/low saturation. |
| MODE | Data Format & DCS Control | Selects output coding (offset binary/twos complement); DCS function inactive on AD9235BCP-40 per datasheet Table 3. |
| SENSE, VREF, REFT, REFB | Reference Interface | Supports internal 1.0 V or 0.5 V reference; SENSE selects mode; REFT/REFB form differential reference pair. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates dual-supply design complexity and reduces BOM count in portable instrumentation and telecom modules. |
| On-chip voltage reference | 1.0 V or 0.5 V selectable reference with ±5 mV output error eliminates need for external precision reference ICs. |
| Flexible analog input range | 1 Vp-p to 2 Vp-p differential span accommodates varying signal chain gain stages without redesign. |
| Low power at 40 MSPS | 165 mW total consumption enables thermal-constrained PCB layouts in compact medical and test equipment. |
| Guaranteed no missing codes | Ensures monotonicity for real-time control loops and feedback systems where code dropout causes instability. |
Applications
| Ultrasound Equipment | IF Sampling in Communications Receivers |
|---|---|
Use Scenario: Digitizing RF echo signals from phased-array transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: ADC front-end capturing 5–15 MHz bandpass-filtered echoes at 40 MSPS for beamforming and image reconstruction. Use Value: 70.4 dBc SNR preserves tissue contrast resolution; 500 MHz input bandwidth supports harmonic imaging modes. |
Use Scenario: Downconverting and digitizing intermediate frequency signals in CDMA-One and IS-95 base stations. IC Role / Device Role / Timing Role: High-speed sampling of 45–70 MHz IF bands with minimal distortion for digital demodulation. Use Value: 85 dBc SFDR prevents adjacent-channel interference; differential input rejects common-mode noise from mixer outputs. |
| Battery-Powered Instruments | Low-Cost Digital Oscilloscopes |
Use Scenario: Signal acquisition in handheld scopemeters and field-service analyzers powered by Li-ion batteries. IC Role / Device Role / Timing Role: Core ADC converting analog waveforms to digital samples with low standby power (1.0 mW). Use Value: 165 mW active power extends battery life; single 3 V supply simplifies power management architecture. |
Use Scenario: Real-time waveform capture in entry-level benchtop oscilloscopes targeting ≤100 MHz bandwidth. IC Role / Device Role / Timing Role: 40 MSPS sampling engine enabling 20 MHz analog bandwidth with 12-bit vertical resolution. Use Value: No missing codes ensures accurate amplitude measurement; pipeline latency of 7 cycles enables deterministic trigger response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-to-digital conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9235BRU-40 | Same core ADC architecture and specs, but in 28-lead TSSOP with different moisture sensitivity level (MSL) and tape/reel packaging. | No functional difference; BRU variant uses standard JEDEC MSL3 packaging versus BCP's enhanced MSL1 rating. | Select AD9235BRU-40 for cost-sensitive production runs where MSL1 handling is not required. |
| AD9226ARSZ-65 | 12-bit, 65 MSPS ADC with higher power (300 mW), no on-chip reference, and 32-lead SSOP package. | Lacks integrated reference and DCS; requires external REF and careful clock duty cycle control. | Choose AD9226ARSZ-65 only when 65 MSPS is mandatory and external reference design is acceptable. |
Compared with AD9235BRU-40, the AD9235BCP-40 offers identical electrical performance with improved moisture resistance; versus AD9226ARSZ-65, it trades maximum speed for lower power, integrated reference, and simplified layout-making it optimal for portable and thermally constrained designs.
Availability
AD9235BCP-40 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling in communications receivers, and battery-powered instruments requiring stable component supply across industrial temperature ranges.
Supply support for AD9235BCP-40 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 AD9235 product line delivers monolithic, low-power, high-speed ADCs optimized for communications infrastructure, medical imaging, and portable test equipment-prioritizing SNR, SFDR, and ease of system integration.
FAQ
What is the maximum analog input frequency supported by the AD9235BCP-40?
The AD9235BCP-40 features a 500 MHz analog input bandwidth, allowing accurate sampling of signals up to 100 MHz while maintaining 70.4 dBc SNR at Nyquist (20 MHz). This bandwidth supports undersampling architectures for IF digitization in wireless receivers and harmonic imaging in ultrasound systems. The AD9235BCP-40 maintains specified AC performance up to fIN = 100 MHz per Figure 20 in the Rev. C datasheet.
Does the AD9235BCP-40 include an on-chip voltage reference?
Yes, the AD9235BCP-40 integrates a precision voltage reference configurable for 1.0 V or 0.5 V output. Reference accuracy is ±5 mV in 1 V mode and ±2.5 mV in 0.5 V mode, with load regulation of 0.8 mV at 1.0 mA. This eliminates the need for external reference ICs in most applications, reducing board space and component count. The AD9235BCP-40 reference is enabled by default and controlled via SENSE and VREF pins.
What is the power consumption of the AD9235BCP-40 at its rated 40 MSPS sampling rate?
The AD9235BCP-40 consumes 165 mW under DC input conditions at 40 MSPS, with 100 mA from AVDD and 5 mA from DRVDD. Under sine-wave input (2.4 MHz, –0.5 dBFS), total power rises to 205 mW. Standby power is 1.0 mW when CLK is inactive. This low power enables use in thermally constrained and battery-operated systems such as handheld scopemeters and portable ultrasound devices.
Is the AD9235BCP-40 pin-compatible with other members of the AD9235 family?
Yes, the AD9235BCP-40 shares identical pinout and footprint with AD9235BCP-20 and AD9235BCP-65 in the 28-lead TSSOP package. All variants use the same AVDD, DRVDD, CLK, VIN+, VIN–, D0–D11, OTR, MODE, SENSE, VREF, REFT, REFB, PDWN, AGND, DGND, and AVDD/AGND pin assignments. This allows direct substitution in existing PCB layouts when upgrading or downgrading sampling rate requirements.
What digital output formats does the AD9235BCP-40 support?
The AD9235BCP-40 supports both offset binary and twos complement data formats, selected via the MODE pin. Offset binary outputs range from 0x000 to 0xFFF for full-scale positive and negative inputs respectively; twos complement provides symmetric representation centered at zero. Both formats are delivered in parallel 12-bit CMOS outputs (D0–D11) with pipeline latency of 7 clock cycles and output delay of 3.5 ns.
AD9235BCP-40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD9235
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.25V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BCP-40 FAQ
1.How can I place an order for AD9235BCP-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BCP-40 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 AD9235BCP-40 reliable?
The price and inventory of AD9235BCP-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BCP-40 is usually 5 days.
3.What payment methods are accepted for AD9235BCP-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BCP-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BCP-40?
AD9235BCP-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BCP-40 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 AD9235BCP-40?
For technical support, including AD9235BCP-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BCP-40 requirements.
6.How does Aetrix verify that AD9235BCP-40 is sourced from the original manufacturer or authorized distributors?
All AD9235BCP-40 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 AD9235BCP-40 meets industry standards.
7.What is the process for return or replacement of AD9235BCP-40?
All AD9235BCP-40 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BCP-40, 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 AD9235BCP-40 part is unused and in its original packaging.
Return procedure for AD9235BCP-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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