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Analog Devices Inc. AD8332ARU-REEL7
- Part No.:
- AD8332ARU-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Amplifiers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8332ARU-REEL7.pdf
- Description:
- IC VGAIN AMP 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
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Product details
Overview
AD8332ARU-REEL7 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 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-REEL7 datasheet, AD8332ARU-REEL7 pinout, AD8332ARU-REEL7 application, or AD8332ARU-REEL7 equivalent, key selection criteria include its dual-channel differential signal path, active RIN matching via external resistor, selectable 3.5 dB / 15.5 dB postamp gain, and clamping-level programmability for ADC protection.
Technical Context
The AD8332ARU-REEL7 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 pin-selectable postamplifier. 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 across both channels simultaneously. The HILO pin selects between two gain ranges (LO: −4.5 dB to +43.5 dB; HI: 7.5 dB to 55.5 dB), while ENBL and ENBV independently enable LNA and VGA sections for power optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LNA Voltage Noise | 0.74 nV/√Hz - enables detection of weak signals in ultrasound front-ends without degrading SNR. |
| VGA Bandwidth | 100 MHz - supports wideband I/Q processing up to 50 MHz baseband with flat group delay (±2 ns variation). |
| Output-Referred Noise | 40 nV/√Hz (LO gain, VGAIN = 0.5 V) - matches 10-bit/12-bit ADC input noise budgets when driving 500 Ω loads. |
| Gain Range Accuracy | ±0.3 dB (0.1–0.95 V VGAIN) - ensures consistent AGC loop performance across temperature and unit variance. |
| Channel Crosstalk | −98 dB - prevents interference between dual-channel TGC paths in phased-array ultrasound systems. |
| Power Dissipation | 138 mW per channel - enables dual-channel operation on 5 V supply with thermal management in RU package. |
| Input Impedance Range | 50 Ω to 6 kΩ - configurable via single external RIZ resistor to match transducer or filter outputs without noise penalty. |
Pinout & Package
The AD8332ARU-REEL7 is housed in a 28-lead TSSOP (RU) package with exposed pad for thermal and grounding integrity. Pin functions are defined per channel, supporting independent biasing and signal routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LON1 / LON2 | LNA inverting output | Differential LNA output pair; requires matched trace lengths to preserve common-mode rejection. |
| LOP1 / LOP2 | LNA noninverting output | Complements LONx for fully differential LNA output; connects directly to VGA inputs VIPx/VINx. |
| VIP1/VIN1, VIP2/VIN2 | VGA differential input | Accepts LNA outputs; internal 1 Ω output impedance enables direct connection without series termination. |
| VOH1/VOL1, VOH2/VOL2 | VGA differential output | Drives ADC inputs; supports clamping via RCLMP to prevent overload during transient events. |
| GAIN | Analog gain control input | 0–1.0 V input sets VGA gain with 50 dB/V scaling; 10 MΩ input impedance minimizes loading on control circuitry. |
| HILO | Gain range select | Logic-high selects HI gain mode (7.5–55.5 dB); logic-low selects LO mode (−4.5–+43.5 dB) for dynamic range trade-off. |
| ENBL / ENBV | LNA/VGA enable | Independent digital enables allow power gating of LNA or VGA sections to reduce quiescent current during idle periods. |
| VCM1 / VCM2 | Output common-mode reference | Sets differential output common-mode level (1.5–3.5 V range); critical for interfacing with ADC input requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable RIN matching | Single external resistor adjusts LNA input impedance from 50 Ω to 6 kΩ while maintaining 0.74 nV/√Hz noise floor. |
| Dual-channel differential signal path | −98 dB crosstalk and <−70 dBc HD3 ensure clean I/Q separation in RF receiver applications. |
| Selectable postamp gain | 3.5 dB or 15.5 dB pin-selectable gain optimizes noise-vs.-headroom trade-off for 10-bit vs. 12-bit ADC interfaces. |
| User-defined output clamping | External RCLMP resistor sets clamping threshold to protect downstream ADCs from overvoltage during gain transients. |
| Linear-in-dB gain law | ±0.2 dB conformance over 0.1–0.95 V VGAIN enables stable closed-loop AGC with minimal calibration overhead. |
Applications
| Ultrasound Time-Gain Control (TGC) | High-Speed Dual ADC Driver |
|---|---|
|
Use Scenario: Compensating for acoustic attenuation in phased-array ultrasound probes across depth-dependent echo returns. IC Role / Device Role / Timing Role: Dual-channel VGA providing synchronized, depth-programmed gain adjustment with sub-ns overload recovery. Use Value: Enables real-time TGC with 48 dB dynamic range and −98 dB inter-channel isolation for high-resolution B-mode imaging. |
Use Scenario: Driving interleaved or parallel 10-/12-bit ADCs in software-defined radio or medical imaging digitizers. IC Role / Device Role / Timing Role: Low-noise, wideband differential driver with programmable output swing and clamping. Use Value: Delivers 40 nV/√Hz noise and 100 MHz bandwidth to maintain ENOB > 10 bits at 40 MSPS sampling rates. |
| I/Q Signal Processing | Automatic Gain Control (AGC) System |
|
Use Scenario: Amplifying in-phase and quadrature baseband signals in zero-IF receivers with matched gain and phase response. IC Role / Device Role / Timing Role: Dual-channel VGA ensuring identical gain, bandwidth, and group delay (<±2 ns) across I and Q paths. Use Value: Reduces image rejection degradation by minimizing channel mismatch, supporting >50 dB image suppression. |
Use Scenario: Stabilizing signal amplitude in optical, sonar, or RF receiver front-ends subject to wide input dynamic range. IC Role / Device Role / Timing Role: Closed-loop VGA with fast 500 ns response time and precise linear-in-dB control interface. Use Value: Achieves <±0.3 dB gain accuracy over temperature, enabling robust AGC loops without frequent recalibration. |
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, 125 mW power, 20-lead QSOP package | Lower channel density; suited for space-constrained single-path designs requiring higher bandwidth | Choose when system needs only one VGA channel and benefits from extended 120 MHz bandwidth. |
| AD8334ACPZ-REEL7 | Quad-channel, 100 MHz bandwidth, 1.97 W thermal dissipation, 64-lead LFCSP package | Higher integration density; requires more complex thermal management and PCB layout | Choose for multi-beam ultrasound or dense I/Q systems where four matched channels justify added complexity. |
Compared with AD8332ARU-REEL7, AD8331ARQZ-REEL7 trades channel count for bandwidth and package size, while AD8334ACPZ-REEL7 scales channel count at the cost of thermal design effort-making AD8332ARU-REEL7 the optimal balance for dual-path, thermally constrained, high-fidelity analog front-ends.
Availability
AD8332ARU-REEL7 is available at Aetrix Electronics and suitable for ultrasound imaging systems, high-speed data acquisition, I/Q demodulation, and automatic gain control circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD8332ARU-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 design centers worldwide and a focus on precision signal chain solutions.
The AD833x family was engineered specifically for ultrasound and sonar time-gain control, delivering ultralow-noise amplification, programmable input impedance, and dual/quad channel integration to replace discrete gain stages in medical and defense imaging front-ends.
FAQ
What is the operating temperature range for the AD8332ARU-REEL7?
The AD8332ARU-REEL7 is specified for operation from −40°C to +85°C ambient temperature. This industrial-grade range supports deployment in ultrasound equipment, portable medical devices, and ruggedized test instrumentation where environmental stability is critical. All electrical specifications-including gain accuracy, noise, and bandwidth-are guaranteed across this full range.
How does the AD8332ARU-REEL7 achieve programmable input impedance without degrading noise performance?
The AD8332ARU-REEL7 uses an active impedance synthesis technique where a single external resistor (RIZ) sets the effective input resistance from 50 Ω to 6 kΩ while preserving the 0.74 nV/√Hz voltage noise floor. This is achieved through internal feedback topology that maintains optimal transistor biasing regardless of RIZ value-enabling direct matching to transducers or filters without external noise-contributing components.
Can the AD8332ARU-REEL7 drive a 12-bit ADC directly, and what postamp gain setting is recommended?
Yes, the AD8332ARU-REEL7 can directly drive a 12-bit ADC using its 15.5 dB postamp gain setting (HILO = high). This configuration maximizes signal-to-noise ratio while maintaining sufficient headroom-its 40 nV/√Hz output-referred noise and ±1.125 V output swing align with typical 12-bit ADC full-scale requirements. The clamping function further protects against overload during gain transitions.
What is the overload recovery time of the AD8332ARU-REEL7, and why is it important in ultrasound applications?
The AD8332ARU-REEL7 recovers from overload in 5 ns (measured at 10 MHz). This ultrafast recovery is essential in ultrasound TGC systems where near-field echoes arrive microseconds before far-field signals-preventing "ghosting" or saturation artifacts in B-mode images. The rapid settling ensures accurate gain application across the entire scan line without signal corruption.
Does the AD8332ARU-REEL7 require external passive components for basic operation, and which ones are mandatory?
Yes-the AD8332ARU-REEL7 requires external bypass capacitors on all supply pins (VPS1, VPS2, VPSV, VPOS), a capacitor on each LMD pin for HF midsupply bypass, and an external RCLMP resistor to set the output clamping level. While RIZ is optional for fixed-impedance sources, it is mandatory for active input matching. No external gain-setting resistors are needed-the gain is fully voltage-controlled via the GAIN pin.
AD8332ARU-REEL7 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-REEL7 FAQ
1.How can I place an order for AD8332ARU-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8332ARU-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 AD8332ARU-REEL7 reliable?
The price and inventory of AD8332ARU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8332ARU-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8332ARU-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8332ARU-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8332ARU-REEL7?
AD8332ARU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8332ARU-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 AD8332ARU-REEL7?
For technical support, including AD8332ARU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8332ARU-REEL7 requirements.
6.How does Aetrix verify that AD8332ARU-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8332ARU-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 AD8332ARU-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8332ARU-REEL7?
All AD8332ARU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8332ARU-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 AD8332ARU-REEL7 part is unused and in its original packaging.
Return procedure for AD8332ARU-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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