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Analog Devices Inc. AD8334ACPZ-REEL7
- Part No.:
- AD8334ACPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD8334ACPZ-REEL7.pdf
- Description:
- IC VGAIN AMP 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,657
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Product details
Overview
AD8334ACPZ-REEL7 from Analog Devices is a quad-channel, ultralow-noise, linear-in-dB variable gain amplifier (VGA) with integrated preamplifier and programmable input impedance. It delivers 19 dB LNA gain, 48 dB VGA gain range (−4.5 dB to +43.5 dB in LO mode), 100 MHz small-signal bandwidth, and 40 nV/√Hz output-referred noise at 0.5 V gain control voltage-optimized for ultrasound time-gain control and high-speed dual ADC driving.
For engineers reviewing the AD8334ACPZ-REEL7 datasheet, AD8334ACPZ-REEL7 pinout, AD8334ACPZ-REEL7 application, or AD8334ACPZ-REEL7 equivalent, key selection criteria include differential signal path integrity, active RIN programmability via external resistor, selectable 3.5 dB/15.5 dB postamp gain, and −40°C to +85°C operation in a thermally enhanced 64-lead LFCSP package.
Technical Context
The AD8334ACPZ-REEL7 implements a cascaded architecture: single-ended-to-differential LNA (0.74 nV/√Hz voltage noise, 2.5 pA/√Hz current noise), X-AMP® VGA with 50 dB/V linear-in-dB gain scaling, and pin-selectable postamp (3.5 dB or 15.5 dB). Each channel features independent enable (ENBL/ENBV), gain slope control (MODE), and clamping (RCLMP) with user-defined threshold.
Its differential outputs achieve −98 dB channel-to-channel crosstalk at 1 MHz and ±2 ns group delay variation across 5–50 MHz, supporting I/Q signal processing and high-density ultrasound beamforming. The 64-lead LFCSP exposes a thermal pad soldered to PCB ground, enabling 24.2°C/W θJA and stable 29.5 mA typical quiescent current per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LNA Gain | 19 dB (single-ended input to differential output); enables high-sensitivity front-end amplification without external gain stages |
| VGA Gain Range | −4.5 dB to +43.5 dB (LO mode); provides 48 dB dynamic range for automatic gain control in echo-ranging systems |
| Small-Signal Bandwidth | 100 MHz; supports wideband ultrasound imaging up to 15 MHz fundamental frequency with margin |
| Output-Referred Noise | 40 nV/√Hz (typical, LO gain, VGAIN = 0.5 V); ensures SNR preservation when driving 10-bit/12-bit ADCs |
| Input Impedance Programmability | 50 Ω to 6 kΩ via external RIZ; allows matched termination to transducer sources without degrading noise figure |
| Postamp Gain Options | 3.5 dB or 15.5 dB (pin-selectable); optimizes full-scale swing and noise trade-off for 10-bit vs. 12-bit ADC interfaces |
| Channel Crosstalk | −98 dB (at 1 MHz); critical for simultaneous multi-channel acquisition in phased-array ultrasound |
| Supply Voltage | 4.5 V to 5.5 V (single 5 V rail); simplifies power design in space-constrained medical imaging modules |
Pinout & Package
The AD8334ACPZ-REEL7 is housed in a 64-lead LFCSP (CP-64) package with exposed thermal pad, requiring soldering to PCB ground for thermal management, noise reduction, and mechanical stability. Pin numbering follows standard JEDEC top-view orientation with Pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INH1–INH4 | LNA Input (CH1–CH4) | Single-ended high-impedance inputs accepting transducer signals; each configurable via dedicated RIZ |
| LOP1/LON1–LOP4/LON4 | LNA Differential Outputs | Drive internal VGA; 5 Ω output impedance enables low-loss interstage connection |
| VIP1/VIN1–VIP4/VIN4 | VGA Differential Inputs | Accept LNA outputs; fully differential topology rejects common-mode noise |
| VOH1/VOL1–VOH4/VOL4 | VGA Differential Outputs | Deliver clamped, gain-adjusted signals to ADC drivers; support 4.5 V p-p differential swing |
| GAIN | Analog Gain Control Input | 0–1.0 V input scales gain at 50 dB/V; factory-trimmed for ±0.1 dB channel matching |
| RCLMP | Clamp Threshold Resistor | External resistor sets output limiting level; prevents ADC saturation during signal overload |
| HILO | Gain Range Select | Logic-high selects HI mode (7.5–55.5 dB); logic-low selects LO mode (−4.5–+43.5 dB) |
| ENBL/ENBV | Channel Enable Controls | ENBL enables LNA; ENBV enables VGA; independent control reduces idle power per channel |
| VCM1–VCM4 | Common-Mode Output Bias | Each channel's VCM pin sets output common-mode voltage (1.5–3.5 V range) for ADC interface alignment |
| VPS1–VPS4, VPSV | Power Supply Pins | VPS1–VPS4 supply LNAs; VPSV supplies VGAs; separate routing minimizes supply coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-noise LNA | 0.74 nV/√Hz voltage noise + 2.5 pA/√Hz current noise enables detection of weak acoustic echoes |
| Programmable input impedance | Adjustable RIN (50 Ω to 6 kΩ) via external RIZ maintains optimal noise match across diverse transducer impedances |
| Differential signal path | −98 dB crosstalk and >60 dB HD2/HD3 suppression preserve signal fidelity in multi-channel beamforming |
| Selectable postamp gain | 3.5 dB or 15.5 dB options allow direct interfacing to either 10-bit (lower noise) or 12-bit (higher resolution) ADCs |
| Output clamping | User-defined clamping via RCLMP prevents ADC input overload during transient echo bursts without external circuitry |
| Thermally enhanced LFCSP | 64-lead CP-64 package with soldered thermal pad achieves 24.2°C/W θJA, enabling stable 4-channel operation at full gain |
Applications
| Ultrasound Time-Gain Control (TGC) | High-Speed Dual ADC Driver |
|---|---|
|
Use Scenario: Compensating for acoustic attenuation in real-time B-mode ultrasound imaging across 128+ channels. IC Role / Device Role / Timing Role: Quad-channel VGA providing synchronized, programmable gain per scan line with <5 ns overload recovery. Use Value: Enables uniform image brightness from near-field to far-field using on-chip RIN tuning and precise 50 dB/V gain law. |
Use Scenario: Driving two interleaved 10-bit/12-bit ADCs in digital oscilloscopes or RF digitizers. IC Role / Device Role / Timing Role: Low-noise, wideband differential driver with 100 MHz bandwidth and 40 nV/√Hz noise floor. Use Value: Preserves ENOB by minimizing added noise and distortion; selectable postamp gain matches ADC full-scale range. |
| I/Q Signal Processing | AGC for Sonar Receivers |
|
Use Scenario: Amplifying in-phase and quadrature baseband signals in software-defined radio receivers. IC Role / Device Role / Timing Role: Two independent channels (e.g., CH1/CH2) configured as matched I/Q paths with identical gain/phase response. Use Value: Channel-to-channel gain matching (±0.1 dB) and phase coherence maintain quadrature accuracy below 0.1° error. |
Use Scenario: Adaptive gain adjustment in underwater sonar echo processors handling variable target returns. IC Role / Device Role / Timing Role: Quad-channel AGC element with fast 500 ns response to 48 dB gain steps and robust overload recovery. Use Value: Maintains dynamic range over 120 dB while rejecting clutter; clamping prevents ADC saturation during strong reverberation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8332ACPZ-REEL7 | Dual-channel version in 32-lead LFCSP; identical LNA/VGA specs but half channel count and lower power (138 mW/channel) | Suitable for cost-sensitive dual-channel ultrasound or I/Q systems where quad density is unnecessary | Select when board space or channel count permits consolidation; shares same gain law, noise, and pinout family |
| LMH6401IRGTR | Single-channel 1.7 GHz VGA with 38 dB gain range; higher bandwidth but 1.1 nV/√Hz input noise and no integrated LNA | Better for RF/IF gain control above 100 MHz; lacks programmable RIN and ultrasound-optimized clamping | Choose for wideband RF applications requiring >500 MHz bandwidth; not drop-in for transducer front-ends |
Compared with AD8332ACPZ-REEL7, the AD8334ACPZ-REEL7 doubles channel count and thermal dissipation capability in the same LFCSP footprint, while LMH6401IRGTR trades ultrasound-specific features for raw RF bandwidth-making AD8334ACPZ-REEL7 irreplaceable in high-channel-count medical imaging where noise, matching, and clamping are non-negotiable.
Availability
AD8334ACPZ-REEL7 is available at Aetrix Electronics and suitable for ultrasound imaging systems, high-speed data acquisition, I/Q signal processing, and sonar receiver designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD8334ACPZ-REEL7 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 engineering expertise spanning precision instrumentation, healthcare, and communications.
The AD833x family was designed specifically for ultrasound time-gain control and high-fidelity analog signal chains, emphasizing ultralow noise, wide bandwidth, and integrated programmability to replace discrete VGA + LNA solutions in medical and test equipment.
FAQ
What is the operating temperature range for the AD8334ACPZ-REEL7?
The AD8334ACPZ-REEL7 operates across −40°C to +85°C, meeting industrial and medical-grade environmental requirements. This range is validated per the Rev. I datasheet and supports deployment in portable ultrasound devices and ruggedized sonar housings where ambient temperatures fluctuate significantly. All specifications-including gain accuracy, noise, and bandwidth-are guaranteed across this full range.
How does the AD8334ACPZ-REEL7 achieve programmable input impedance?
The AD8334ACPZ-REEL7 uses external resistors (RIZ) connected to dedicated pins per channel to set LNA input resistance from 50 Ω to 6 kΩ. With RIZ = 280 Ω, input impedance is 50 Ω; with RIZ = ∞, it rises to 6 kΩ. This active matching preserves 0.74 nV/√Hz noise performance while enabling optimal source termination for diverse transducers-no external feedback networks required.
Can the AD8334ACPZ-REEL7 drive a 12-bit ADC directly?
Yes-the AD8334ACPZ-REEL7 can directly drive 12-bit ADCs using its 15.5 dB postamp gain setting, which optimizes full-scale swing and output noise trade-offs. At 0.5 V gain control voltage and LO mode, its 40 nV/√Hz output-referred noise contributes <0.5 LSB RMS noise to a 2 VPP input range, preserving effective number of bits (ENOB) without external buffering.
What is the purpose of the RCLMP pin on the AD8334ACPZ-REEL7?
The RCLMP pin on the AD8334ACPZ-REEL7 accepts an external resistor to set the output clamping voltage level, preventing ADC saturation during large transient signals like ultrasound near-field echoes. With RCLMP = 2.74 kΩ in LO mode, clamping occurs at ±1 V; in HI mode (RCLMP = 2.21 kΩ), it shifts to ±1.25 V-enabling adaptive overload protection without sacrificing small-signal integrity.
Is the AD8334ACPZ-REEL7 pin-compatible with other AD833x devices?
No-the AD8334ACPZ-REEL7 uses a unique 64-lead LFCSP (CP-64) package, while AD8331 (20-lead QSOP) and AD8332 (28-lead TSSOP or 32-lead LFCSP) have different footprints and pin counts. Although functional blocks and gain laws are consistent across the AD833x family, PCB layout and thermal design must be specific to the AD8334ACPZ-REEL7's 64-pin configuration and exposed thermal pad requirements.
AD8334ACPZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- X-AMP®
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Variable Gain Amplifier
- Applications:
- Signal Processing
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-LFCSP-VQ (9x9)
AD8334ACPZ-REEL7 FAQ
1.How can I place an order for AD8334ACPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8334ACPZ-REEL7 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 AD8334ACPZ-REEL7 reliable?
The price and inventory of AD8334ACPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8334ACPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8334ACPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8334ACPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8334ACPZ-REEL7?
AD8334ACPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8334ACPZ-REEL7 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 AD8334ACPZ-REEL7?
For technical support, including AD8334ACPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8334ACPZ-REEL7 requirements.
6.How does Aetrix verify that AD8334ACPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8334ACPZ-REEL7 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 AD8334ACPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8334ACPZ-REEL7?
All AD8334ACPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8334ACPZ-REEL7, 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 AD8334ACPZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8334ACPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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