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Analog Devices Inc. AD8332ARU-REEL
- Part No.:
- AD8332ARU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8332ARU-REEL.pdf
- Description:
- IC VGAIN AMP 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,904
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Product details
Overview
AD8332ARU-REEL from Analog Devices is a dual-channel ultralow-noise 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 differential ADC driving.
For engineers reviewing the AD8332ARU-REEL datasheet, AD8332ARU-REEL pinout, AD8332ARU-REEL application, or AD8332ARU-REEL equivalent, key selection criteria include its dual-channel differential signal path, active RIN matching via external resistor, HI/LO gain mode selection, clamping-level programmability, and TSSOP-28 package compatibility with high-density medical and test equipment layouts.
Technical Context
The AD8332ARU-REEL integrates two independent signal chains, each comprising an ultralow-noise LNA (0.74 nV/√Hz voltage noise, 2.5 pA/√Hz current noise), a linear-in-dB X-AMP® VGA with 50 dB/V gain scaling, and a selectable postamp (3.5 dB or 15.5 dB). Its differential architecture ensures −98 dB channel-to-channel crosstalk and low harmonic distortion (HD2 = −62 dBc at 10 MHz).
Gain control is implemented via a single analog voltage (0–1.0 V) applied to the GAIN pin, enabling precise 48 dB range adjustment with ±0.3 dB typical absolute error across 0.1–0.95 V. The HILO pin selects between two gain ranges, while MODE sets gain slope polarity, and RCLMP sets clamping threshold via external resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LNA Voltage Noise | 0.74 nV/√Hz - enables detection of weak ultrasound echoes without degrading SNR. |
| VGA Bandwidth | 100 MHz (−3 dB, small-signal) - supports wideband I/Q processing up to 50 MHz IF. |
| Output-Referred Noise | 40 nV/√Hz (LO gain, VGAIN = 0.5 V) - matches 12-bit ADCs with ≥70 dB SNR at 100 MSPS. |
| Gain Range | −4.5 dB to +43.5 dB (LO mode) - provides 48 dB dynamic range for automatic gain control loops. |
| Input Impedance | Programmable 50 Ω to 200 Ω via RIZ - allows direct matching to transducer or filter outputs without external transformers. |
| Clamping Accuracy | ±50 mV (LO gain) - ensures consistent ADC input protection across temperature and process variation. |
| Supply Current | 22–27.5 mA per channel - enables dual-channel operation on 5 V supply with <280 mW total dissipation. |
Pinout & Package
AD8332ARU-REEL is housed in a 28-lead TSSOP (RU) package with exposed thermal pad requiring PCB ground connection. Pin functions are fully defined per Analog Devices' Rev. I datasheet Figure 4 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LON1 / LOP1 | Channel 1 LNA differential outputs | Drive VGA inputs with 19 dB gain and matched phase; require 5 Ω source termination. |
| VIN1 / VIP1 | Channel 1 VGA differential inputs | Accept LNA outputs or external signals; high-impedance (10 MΩ) gain control interface referenced to VCM1. |
| VOH1 / VOL1 | Channel 1 VGA differential outputs | Deliver clamped, postamp-adjusted differential signal; drive 500 Ω loads with ±1.125 V swing around VCM1. |
| GAIN | Analog gain control input | 0–1.0 V input sets VGA gain with 50 dB/V scaling; 10 MΩ input impedance minimizes loading. |
| HILO | Gain range select | Logic-high selects HI mode (7.5–55.5 dB); logic-low selects LO mode (−4.5–+43.5 dB). |
| RCLMP | Clamp level set | External resistor defines output voltage limit; enables overload protection before ADC front-end. |
| ENB | Global enable | Active-high enables both LNA and VGA; power-down current ≤600 µA per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-noise LNA | 0.74 nV/√Hz voltage noise + 2.5 pA/√Hz current noise - preserves SNR in weak-signal medical imaging. |
| Programmable RIN | 50–200 Ω via single external resistor - eliminates balun or matching network in transducer interfaces. |
| Dual-channel isolation | −98 dB crosstalk at 1 MHz - prevents interference between parallel receive paths in phased-array ultrasound. |
| Linear-in-dB gain law | ±0.2 dB conformance over 0.1–0.95 V - simplifies AGC loop design with predictable dB/V response. |
| Output clamping | User-defined threshold via RCLMP - protects downstream ADCs from saturation during echo bursts. |
Applications
| Ultrasound Time-Gain Control (TGC) | I/Q Signal Processing |
|---|---|
|
Use Scenario: Amplifying time-varying echo returns from deep tissue in phased-array ultrasound systems. IC Role / Device Role / Timing Role: Dual-channel VGA providing synchronized, programmable gain ramp per channel to compensate for acoustic attenuation. Use Value: 48 dB gain range and 100 MHz bandwidth support full-depth imaging up to 15 cm at 5 MHz center frequency with minimal group delay variation (±2 ns). |
Use Scenario: Conditioning quadrature baseband signals in software-defined radio and radar receivers. IC Role / Device Role / Timing Role: Independent I- and Q-path amplification with matched gain, phase, and noise performance. Use Value: −98 dB inter-channel crosstalk and ±0.1 dB gain matching preserve image fidelity and EVM in coherent demodulation. |
| High-Speed ADC Driver | AGC System Front-End |
|
Use Scenario: Driving 10-bit/12-bit differential ADCs in digitizers and spectrum analyzers. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth driver with selectable postamp gain (3.5 dB or 15.5 dB) to optimize SNR vs. full-scale range. Use Value: 40 nV/√Hz output noise and ±1.125 V output swing ensure ≥70 dB SNR into 12-bit, 100 MSPS ADCs. |
Use Scenario: Closed-loop gain adjustment in RF receiver front-ends where signal amplitude varies >60 dB. IC Role / Device Role / Timing Role: Core gain element in analog AGC loop with fast 500 ns response time and stable 50 dB/V control law. Use Value: Linear-in-dB scaling and factory-trimmed gain matching reduce calibration overhead and improve loop stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8331ARQZ-REEL7 | Single-channel, 120 MHz bandwidth, QSOP-20 package, 125 mW/channel power. | Suitable for cost-sensitive single-path systems; lacks dual-channel integration and TSSOP thermal performance. | Select when board space permits larger QSOP and only one channel is required. |
| AD8334ACPZ-REEL7 | Quad-channel, 64-lead LFCSP, 100 MHz bandwidth, 138 mW/channel, exposed thermal pad. | Higher channel density for compact multi-beam ultrasound; requires more complex layout and thermal management. | Select for 4-channel phased arrays where footprint and thermal resistance (24.2°C/W) outweigh TSSOP trade-offs. |
Compared with AD8332ARU-REEL, AD8331ARQZ-REEL7 offers higher bandwidth but no channel integration, while AD8334ACPZ-REEL7 doubles channel count at the cost of larger package size and tighter layout constraints - making AD8332ARU-REEL the optimal balance for dual-path medical and instrumentation designs.
Availability
AD8332ARU-REEL is available at Aetrix Electronics and suitable for ultrasound imaging systems, high-speed data acquisition, I/Q demodulators, and automatic gain control circuits requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for AD8332ARU-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The AD833x family was developed specifically for ultrasound and sonar time-gain control, delivering ultralow-noise amplification, precise linear-in-dB gain control, and integrated impedance matching to replace discrete LNA-VGA-postamp signal chains.
FAQ
What is the operating temperature range for AD8332ARU-REEL?
The AD8332ARU-REEL is specified for continuous operation from −40°C to +85°C ambient temperature. This range is validated across all electrical parameters in the Rev. I datasheet, including gain accuracy, noise performance, and output clamping behavior - making it suitable for medical ultrasound systems and industrial test equipment deployed in uncontrolled environments.
Does AD8332ARU-REEL support single-ended input configurations?
AD8332ARU-REEL does not support true single-ended input operation at the VGA stage. Its core signal path is fully differential: VIN1/VIP1 and VIN2/VIP2 are complementary inputs requiring balanced drive. However, the LNA inputs (INH1/INH2) accept single-ended signals, with LNA outputs (LON1/LOP1, LON2/LOP2) providing differential drive to the VGA - enabling seamless single-ended-to-differential conversion within the same IC.
How is input impedance programmed on AD8332ARU-REEL?
Input impedance on AD8332ARU-REEL is programmed by connecting an external resistor (RIZ) between the LMD1/LMD2 pins and ground. Values of 280 Ω, 412 Ω, 562 Ω, or 1.13 kΩ yield nominal input resistances of 50 Ω, 75 Ω, 100 Ω, or 200 Ω respectively - allowing direct matching to transducers, filters, or coaxial sources without external components, while preserving ultralow noise performance.
What is the maximum recommended supply voltage for AD8332ARU-REEL?
The absolute maximum supply voltage for AD8332ARU-REEL is 5.5 V on all VPSn, VPSV, and VPOS pins. Operation is fully specified at 5.0 V ±0.5 V (4.5 V to 5.5 V). Exceeding 5.5 V risks permanent damage per the Absolute Maximum Ratings table; PSRR of −68 dB at 100 kHz confirms robust rejection of supply ripple within the rated range.
Can AD8332ARU-REEL drive a 50 Ω load directly?
No, AD8332ARU-REEL is not designed to drive 50 Ω loads directly. Its differential outputs (VOH1/VOL1, VOH2/VOL2) have a 1 Ω output impedance and are specified for ≥500 Ω loads. Driving 50 Ω would cause excessive current draw, distortion, and potential thermal overstress. For 50 Ω interface, use an external 1:4 broadband transformer or buffer amplifier after the AD8332ARU-REEL outputs.
AD8332ARU-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- X-AMP®
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Variable Gain Amplifier
- Applications:
- Signal Processing
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-TSSOP
AD8332ARU-REEL FAQ
1.How can I place an order for AD8332ARU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8332ARU-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 AD8332ARU-REEL reliable?
The price and inventory of AD8332ARU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8332ARU-REEL is usually 5 days.
3.What payment methods are accepted for AD8332ARU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8332ARU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8332ARU-REEL?
AD8332ARU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8332ARU-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 AD8332ARU-REEL?
For technical support, including AD8332ARU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8332ARU-REEL requirements.
6.How does Aetrix verify that AD8332ARU-REEL is sourced from the original manufacturer or authorized distributors?
All AD8332ARU-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 AD8332ARU-REEL meets industry standards.
7.What is the process for return or replacement of AD8332ARU-REEL?
All AD8332ARU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8332ARU-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 AD8332ARU-REEL part is unused and in its original packaging.
Return procedure for AD8332ARU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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