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Analog Devices Inc. AD9235BRUZRL7-20
- Part No.:
- AD9235BRUZRL7-20
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD9235BRUZRL7-20.pdf
- Description:
- IC ADC 12BIT PIPELINED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:887
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Product details
Overview
AD9235BRUZRL7-20 from Analog Devices is a monolithic, single-supply 12-bit analog-to-digital converter (ADC) optimized for 20 MSPS sampling in communications and medical imaging systems. It features a differential sample-and-hold amplifier (SHA), on-chip voltage reference, and clock duty cycle stabilizer (DCS). With 70 dBc SNR at Nyquist and ±0.4 LSB DNL, it supports ultrasound front-ends and IF-sampling receivers requiring high linearity and low power.
For engineers reviewing the AD9235BRUZRL7-20 datasheet, AD9235BRUZRL7-20 pinout, AD9235BRUZRL7-20 application, or AD9235BRUZRL7-20 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-temperature operation (–40°C to +85°C), and real-world use cases in battery-powered instrumentation and digital oscilloscopes - all grounded in Rev. D datasheet data.
Technical Context
The AD9235BRUZRL7-20 employs a multistage 1.5-bit pipeline architecture with output error correction logic to guarantee 12-bit accuracy and no missing codes across its full temperature range. Its differential SHA supports up to 500 MHz analog input bandwidth and configurable 1 Vp-p or 2 Vp-p input ranges.
It operates from a single 3 V supply (2.7 V to 3.6 V), with separate DRVDD (2.25 V to 3.6 V) for digital outputs compatible with both 2.5 V and 3.3 V logic families. The integrated clock duty cycle stabilizer ensures robust timing performance even with asymmetric clock inputs - though DCS is disabled in the -20 variant per datasheet Table 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct output codes with no missing codes over full temperature range. |
| Max Sample Rate | 20 MSPS - fixed maximum conversion rate for this variant; enables real-time digitization of signals up to 10 MHz (Nyquist). |
| SNR @ 2.4 MHz | 70.8 dBc typical - defines usable dynamic range for baseband and low-IF applications. |
| DNL | ±0.35 LSB typical - ensures monotonic transfer function critical for closed-loop control and precision measurement. |
| Power Consumption | 90 mW DC input at 20 MSPS - enables thermal-constrained designs in handheld test equipment. |
| Analog Input Bandwidth | 500 MHz - supports wideband IF sampling and undersampling of RF signals beyond Nyquist. |
| Supply Voltage Range | AVDD: 2.7 V–3.6 V; DRVDD: 2.25 V–3.6 V - allows flexible I/O interfacing while maintaining analog integrity. |
Pinout & Package
AD9235BRUZRL7-20 is packaged in a 28-lead TSSOP (RU-28) with exposed paddle, rated for industrial temperature (–40°C to +85°C). Pin 1 is OTR (Out-of-Range indicator); pins 15–22 and 25–28 are D0 (LSB) to D11 (MSB) digital outputs; AVDD and AGND are duplicated for analog supply decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OTR (Pin 1) | Overflow flag | Asserts high when input exceeds selected full-scale range; used with MSB to distinguish high/low overflow conditions. |
| MODE (Pin 2) | Data format & DCS control | Selects offset binary/twos complement output and enables/disables clock duty cycle stabilizer (DCS inactive in -20 variant). |
| VIN+ / VIN– (Pins 9, 10) | Differential analog input | Accepts 1 Vp-p or 2 Vp-p differential signal; 7 pF input capacitance requires careful layout for >10 MHz operation. |
| CLK (Pin 13) | Sampling clock input | Single-ended CMOS-compatible input; minimum pulse width 15 ns; no DCS compensation required for -20 model. |
| D0–D11 (Pins 15–22, 25–28) | Parallel digital output bus | 12-bit straight binary or twos complement data; 7-cycle pipeline latency; 3.5 ns output delay referenced to CLK edge. |
| PDWN (Pin 14) | Power-down control | Active-high signal reducing power to 1.0 mW; wake-up time 3.0 ms with recommended 0.1 µF + 10 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates dual-supply design complexity and reduces BOM count; AVDD and DRVDD independently configurable for mixed-voltage systems. |
| On-chip reference & SHA | Removes need for external reference IC and discrete sample-hold circuitry; simplifies layout and improves thermal tracking. |
| Flexible analog input range | Supports 1 Vp-p or 2 Vp-p differential input via VREF/SENSE configuration - adaptable to sensor output levels without external gain stages. |
| Low power at 20 MSPS | 90 mW total consumption enables integration into battery-powered scopemeters and portable ultrasound probes. |
| Industrial temperature grade | Specified from –40°C to +85°C with guaranteed performance - suitable for embedded medical and industrial field equipment. |
Applications
| Ultrasound Front-End Digitization | IF Sampling in Cellular Receivers |
|---|---|
|
Use Scenario: Digitizing echo return signals from piezoelectric transducers in portable ultrasound machines operating at 2–15 MHz center frequencies. IC Role / Device Role / Timing Role: ADC core performing 20 MSPS sampling of conditioned analog IF or baseband signals with precise timing alignment to system clock. Use Value: 70.8 dBc SNR preserves weak tissue echo contrast; ±0.35 LSB DNL ensures accurate amplitude mapping for grayscale rendering. |
Use Scenario: Downconverting and digitizing IS-95/CDMA-One intermediate frequency signals (e.g., 45–90 MHz) in compact base station receivers. IC Role / Device Role / Timing Role: High-fidelity IF sampler enabling direct digital downconversion with minimal aliasing due to 500 MHz analog bandwidth. Use Value: 80 dBc SFDR at 9.7 MHz prevents intermodulation distortion from adjacent channel interference in multi-carrier environments. |
| Battery-Powered Scopemeters | Low-Cost Digital Oscilloscopes |
|
Use Scenario: Real-time waveform capture in handheld 2-channel scopemeters powered by Li-ion batteries with strict thermal envelope limits. IC Role / Device Role / Timing Role: Primary ADC converting probe-amplified signals at 20 MSPS with deterministic 7-cycle latency for trigger synchronization. Use Value: 90 mW power draw extends battery life; 12-bit resolution provides sufficient vertical granularity for debugging embedded serial buses. |
Use Scenario: Entry-level benchtop oscilloscopes targeting education and service markets requiring ≥10 MHz analog bandwidth and ≥1 kpts memory depth. IC Role / Device Role / Timing Role: Cost-optimized ADC delivering 20 MSPS throughput with on-chip reference to reduce component count and PCB area. Use Value: Integrated 1 V reference eliminates external REF IC; TSSOP package enables compact 4-layer board design with standard reflow assembly. |
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 |
|---|---|---|---|
| AD9235BRUZ-20 | Same die, identical specs, but supplied in tube (not tape-and-reel); no functional difference from AD9235BRUZRL7-20. | Identical use cases; preferred for prototyping or low-volume builds where reel handling is unnecessary. | Select AD9235BRUZRL7-20 for automated SMT production; choose AD9235BRUZ-20 for hand-soldered evaluation or small-batch calibration fixtures. |
| ADS8325IPW | 16-bit, 100 kSPS SAR ADC; higher resolution but 200× slower sampling rate; no on-chip reference or SHA. | Suitable for precision DC/low-frequency measurements (e.g., sensor data loggers), not for IF or ultrasound sampling. | Choose ADS8325IPW only when resolution >12-bit and speed <100 kSPS suffice; AD9235BRUZRL7-20 remains mandatory for >1 MSPS real-time acquisition. |
Compared with AD9235BRUZ-20, the AD9235BRUZRL7-20 offers identical electrical performance in tape-and-reel packaging for pick-and-place compatibility; versus ADS8325IPW, it trades resolution for 200× higher throughput and integrated analog front-end functionality essential for dynamic signal capture.
Availability
AD9235BRUZRL7-20 is available at Aetrix Electronics and suitable for ultrasound equipment, IF sampling receivers, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD9235BRUZRL7-20 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 designed specifically for communications infrastructure, medical imaging, and portable test equipment demanding precision, bandwidth, and power efficiency.
FAQ
What is the maximum analog input frequency supported by AD9235BRUZRL7-20?
The AD9235BRUZRL7-20 features a 500 MHz analog input bandwidth, enabling undersampling of RF signals well above its 20 MSPS Nyquist limit of 10 MHz. Performance metrics such as SNR and SFDR are characterized up to 100 MHz input frequency, confirming usability in IF-sampling architectures where aliasing is intentionally managed through filtering.
Does AD9235BRUZRL7-20 include an internal voltage reference?
Yes, AD9235BRUZRL7-20 integrates a precision voltage reference supporting both 0.5 V and 1.0 V modes. In 1.0 V mode, output voltage error is ±5 mV over temperature; load regulation is 0.8 mV at 1.0 mA. The SENSE pin configures reference mode, and REFT/REFB provide differential reference connections for improved noise rejection.
Is clock duty cycle stabilization enabled on AD9235BRUZRL7-20?
No - the clock duty cycle stabilizer (DCS) is only active in the AD9235BRUZRL7-65 variant. Per datasheet Table 3, DCS functionality is not applicable to the -20 and -40 models. The AD9235BRUZRL7-20 requires a clock with minimum high/low pulse widths of 15 ns but does not compensate for duty cycle asymmetry.
What package type is used for AD9235BRUZRL7-20?
AD9235BRUZRL7-20 is supplied in a 28-lead TSSOP (RU-28) package with exposed paddle, as confirmed in the Ordering Guide and Figure 3 of Rev. D datasheet. This package is distinct from the 32-lead LFCSP option offered for other AD9235 variants and is specified for industrial temperature operation (–40°C to +85°C).
Can AD9235BRUZRL7-20 operate with a 2.5 V digital supply?
Yes - AD9235BRUZRL7-20 supports DRVDD from 2.25 V to 3.6 V, making it fully compatible with 2.5 V logic families. Digital outputs meet specified VOH/VOL levels at both 2.5 V and 3.3 V DRVDD, allowing seamless interface to FPGAs or microcontrollers without level-shifting circuitry.
AD9235BRUZRL7-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 20M
- 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:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BRUZRL7-20 FAQ
1.How can I place an order for AD9235BRUZRL7-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BRUZRL7-20 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 AD9235BRUZRL7-20 reliable?
The price and inventory of AD9235BRUZRL7-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BRUZRL7-20 is usually 5 days.
3.What payment methods are accepted for AD9235BRUZRL7-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BRUZRL7-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BRUZRL7-20?
AD9235BRUZRL7-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BRUZRL7-20 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 AD9235BRUZRL7-20?
For technical support, including AD9235BRUZRL7-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BRUZRL7-20 requirements.
6.How does Aetrix verify that AD9235BRUZRL7-20 is sourced from the original manufacturer or authorized distributors?
All AD9235BRUZRL7-20 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 AD9235BRUZRL7-20 meets industry standards.
7.What is the process for return or replacement of AD9235BRUZRL7-20?
All AD9235BRUZRL7-20 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BRUZRL7-20, 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 AD9235BRUZRL7-20 part is unused and in its original packaging.
Return procedure for AD9235BRUZRL7-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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