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Analog Devices Inc. AD8330ARQZ
- Part No.:
- AD8330ARQZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
AD8330ARQZ.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,902
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Product details
Overview
AD8330ARQZ from Analog Devices is a wideband, fully differential variable gain amplifier (VGA) operating from DC to 150 MHz with constant bandwidth across 0 dB to 50 dB gain range, 5 nV/√Hz input-referred noise at max gain, and rail-to-rail differential outputs. It serves as a pre-ADC signal conditioner in high-speed data acquisition systems requiring precise gain control and low distortion.
For engineers reviewing the AD8330ARQZ datasheet, AD8330ARQZ pinout, AD8330ARQZ application, or AD8330ARQZ equivalent, key selection criteria include its linear-in-dB gain control slope (30 mV/dB), dual-mode gain interface (VDBS + VMAG), offset compensation capability, and 16-lead 3 mm × 3 mm LFCSP package compatibility with high-density PCB layouts.
Technical Context
The AD8330ARQZ employs a translinear bipolar core on a silicon-on-insulator process to achieve stable 150 MHz bandwidth across its full 50 dB gain range-unlike conventional VGAs where bandwidth degrades with gain reduction. Its decibel gain control is implemented via exponential current modulation of the denominator bias current (ID) using VDBS, while VMAG scales the numerator current (IN) to reposition the 0–50 dB window over a >100 dB total range.
It supports both differential and single-ended inputs (±2 V peak differential), features two power-down modes (full shutdown and hibernate), and provides independent common-mode output control (CNTR) for ADC interfacing. Offset correction is configurable via OFST pin connection state, enabling DC-coupled or AC-coupled operation down to 5 Hz high-pass corner.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 150 MHz at all gains - enables consistent pulse fidelity and gain law conformance up to RF frequencies. |
| Gain Range (dB mode) | 0 dB to 50 dB (0 V–1.5 V on VDBS, 30 mV/dB) - supports precise automatic gain control in dynamic signal environments. |
| Gain Range (linear mode) | ×0.03 to ×10 (15 mV–5 V on VMAG) - allows numeric gain scaling and repositioning of the dB range by ±30 dB. |
| Input Noise Density | 5 nV/√Hz typical at max gain - ensures high SNR in low-level signal amplification before ADC sampling. |
| Differential Output Swing | ±2 V (peaks) at 5 V supply - delivers full-scale drive into 75 Ω or high-impedance loads without clipping. |
| Distortion (HD2) | ≤−62 dBc at 10 MHz, 1 Vp-p - meets requirements for medium-fidelity instrumentation and communications front-ends. |
| Supply Current | 20 mA typical at 2.7–6 V - enables low-power operation in battery-backed or thermally constrained systems. |
Pinout & Package
AD8330ARQZ is housed in a 16-lead, 3 mm × 3 mm LFCSP package with exposed thermal pad (EPAD), rated for −40°C to +85°C operation. The EPAD must be soldered to ground for optimal thermal performance and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPSI | Positive supply for input stages | Separate 2.7–6 V rail isolates input bias from output load transients. |
| INHI / INLO | Differential signal inputs (±) | Accepts ±2 V peak differential or single-ended signals; 1 kΩ differential input resistance. |
| MODE | Gain slope polarity control | High = gain increases with VDBS; Low = gain decreases - enables inverted AGC response. |
| VDBS | Linear-in-dB gain control voltage | 0–1.5 V sets 0–50 dB gain at 30 mV/dB; 250 ns settling to 0.5 dB error. |
| VMAG | Linear gain scaling voltage | 0–5 V adjusts nominal gain multiplier (×0.03 to ×10); default 0.5 V yields ×1 gain. |
| OPHI / OPLO | Differential signal outputs (±) | 150 Ω differential output impedance; rail-to-rail swing referenced to CNTR. |
| CNTR | Common-mode output voltage control | 0.5–4.5 V range sets output common-mode level - critical for matching ADC input range. |
| OFST | Offset compensation enable/disable | Open = auto-offset correction active; grounded = DC-coupled path with ±40 mV offset. |
| ENBL | Power enable (active high) | Logic high = full operation; 1.3–1.7 V = hibernate (1.5 mA); <0.5 V = shutdown (<100 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential signal path | Enables rejection of common-mode noise and interference in high-noise industrial or RF environments. |
| Constant 150 MHz bandwidth | Maintains identical frequency response regardless of gain setting - eliminates gain-dependent phase shift in time-critical applications. |
| Dual gain control interfaces | VDBS (linear-in-dB) + VMAG (linear-in-magnitude) allow simultaneous coarse/fine gain adjustment and >100 dB effective dynamic range. |
| Configurable offset compensation | OFST pin enables selectable DC coupling (grounded) or AC coupling with 5 Hz–100 kHz high-pass corner (capacitor-based). |
| Independent common-mode control | CNTR pin permits output common-mode voltage to be set within 0.5 V of either rail - simplifies interfacing to diverse ADC architectures. |
| Two-stage power-down | Hibernate mode retains output bias at CNTR while reducing current to 1.5 mA; full shutdown draws <100 µA - ideal for duty-cycled systems. |
Applications
| Pre-ADC Signal Conditioning | 75 Ω Cable Driving |
|---|---|
|
Use Scenario: Amplifying low-level sensor or RF signals prior to digitization in high-speed data acquisition systems. IC Role / Device Role / Timing Role: VGA front-end providing programmable gain, DC offset correction, and common-mode level shifting to match ADC input specifications. Use Value: Enables full utilization of ADC dynamic range across varying input amplitudes while preserving signal integrity up to 150 MHz. |
Use Scenario: Driving long coaxial cables in video, test equipment, or broadcast infrastructure with impedance-matched output. IC Role / Device Role / Timing Role: Differential driver with 75 Ω output impedance per side and rail-to-rail swing supporting standard video signal levels. Use Value: Eliminates external termination components and maintains signal fidelity over cable lengths due to constant bandwidth and low distortion. |
| AGC Amplifier | Wide-Range True RMS Voltmeter |
|
Use Scenario: Closed-loop automatic gain control in receiver front-ends where signal amplitude varies widely (e.g., radar, ultrasound). IC Role / Device Role / Timing Role: Core gain element with fast 250 ns VDBS settling and MODE pin inversion for feedback polarity flexibility. Use Value: Supports rapid gain adaptation without bandwidth trade-offs - critical for maintaining SNR during burst-mode or pulsed signal reception. |
Use Scenario: Precision AC voltage measurement across multi-decade amplitude ranges in calibration and metrology instruments. IC Role / Device Role / Timing Role: Linear-in-dB VGA feeding RMS detector circuitry; VMAG repositions gain window to maintain detector linearity. Use Value: Extends measurable input range beyond 100 dB by dynamically scaling signal level before RMS conversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8370ACPZ-R7 | Higher 750 MHz bandwidth but fixed 20 dB gain; no VMAG interface; requires external gain control loop. | Better suited for wideband IF amplification where gain is static; lacks integrated AGC flexibility of AD8330ARQZ. | Select when bandwidth >300 MHz is required and gain is set externally; avoid if dual-control interface or DC coupling is needed. |
| LMH6401IRGET | DC–1.9 GHz bandwidth, digital SPI gain control (0.5 dB steps), 24-lead WQFN; higher power (90 mA). | Targets high-frequency communications (5G, DOCSIS); lacks analog VDBS/VMAG interface and offset correction. | Choose for RF applications above 200 MHz requiring digital precision; not suitable for analog AGC or low-noise DC-coupled designs. |
Compared with AD8330ARQZ, AD8370ACPZ-R7 trades gain flexibility for bandwidth and simplicity, while LMH6401IRGET replaces analog control with digital programmability at higher speed and power cost - making AD8330ARQZ optimal for medium-bandwidth, analog-controlled, low-noise instrumentation.
Availability
AD8330ARQZ is available at Aetrix Electronics and suitable for pre-ADC signal conditioning, 75 Ω cable driving, and AGC amplifier applications requiring stable component supply, extended temperature operation (−40°C to +85°C), and RoHS-compliant packaging.
Supply support for AD8330ARQZ 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 AD8330 belongs to Analog Devices' precision variable gain amplifier product line, designed specifically for wideband, low-noise, DC-coupled signal conditioning in instrumentation, medical imaging, and communications infrastructure.
FAQ
What is the maximum small-signal bandwidth of the AD8330ARQZ?
The AD8330ARQZ maintains a constant small-signal –3 dB bandwidth of 150 MHz across its entire 0 dB to 50 dB gain range. This bandwidth is specified under differential operation with 12 pF load capacitance on OPHI and OPLO, and remains stable regardless of VDBS or VMAG settings - a key differentiator from conventional VGAs whose bandwidth rolls off with increasing gain.
How does the AD8330ARQZ implement offset compensation?
The AD8330ARQZ implements offset compensation via the OFST pin: when left unconnected, internal auto-correction is enabled, reducing differential output offset to ±5 mV; when grounded, correction is disabled and offset rises to ±40 mV. An external capacitor from OFST to CNTR sets the high-pass corner frequency - e.g., 3.3 nF yields ~100 kHz - allowing flexible DC or AC coupling per application needs.
Can the AD8330ARQZ drive a 75 Ω load directly?
Yes, the AD8330ARQZ can drive a 75 Ω load directly in differential configuration: its differential output impedance is 150 Ω (75 Ω per side), and it delivers rail-to-rail output swing referenced to CNTR. With CNTR set to VS/2 and 5 V supply, it achieves ±2 V differential swing (4 Vp-p) into matched 75 Ω - meeting SMPTE and broadcast video level requirements without external resistive termination.
What is the function of the MODE pin on the AD8330ARQZ?
The MODE pin on the AD8330ARQZ selects the polarity of the VDBS gain control slope: logic high (open or >1.5 V) configures gain to increase with rising VDBS (0–1.5 V → 0–50 dB); logic low (<0.5 V) inverts the relationship so gain decreases over the same voltage range (0–1.5 V → 50–0 dB). This enables direct integration into both rising- and falling-edge AGC feedback loops without external inversion circuitry.
Does the AD8330ARQZ support single-ended input operation?
Yes, the AD8330ARQZ supports single-ended input operation: drive one input (e.g., INHI) with signal and tie the other (INLO) to a stable common-mode voltage (e.g., VS/2 via resistor divider). Input resistance remains ~1 kΩ differential, and full-scale input capability is reduced to ~1 Vrms (vs. 1 Vrms differential), but noise, distortion, and bandwidth performance are preserved - verified in Analog Devices' "Using the AD8330" section (Page 21).
AD8330ARQZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 1500V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 150 MHz
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- -
- Current - Supply:
- 20mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
AD8330ARQZ FAQ
1.How can I place an order for AD8330ARQZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8330ARQZ 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 AD8330ARQZ reliable?
The price and inventory of AD8330ARQZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8330ARQZ is usually 5 days.
3.What payment methods are accepted for AD8330ARQZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8330ARQZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8330ARQZ?
AD8330ARQZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8330ARQZ 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 AD8330ARQZ?
For technical support, including AD8330ARQZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8330ARQZ requirements.
6.How does Aetrix verify that AD8330ARQZ is sourced from the original manufacturer or authorized distributors?
All AD8330ARQZ 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 AD8330ARQZ meets industry standards.
7.What is the process for return or replacement of AD8330ARQZ?
All AD8330ARQZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8330ARQZ, 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 AD8330ARQZ part is unused and in its original packaging.
Return procedure for AD8330ARQZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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