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Analog Devices Inc. AD8330ACPZ-R2
- Part No.:
- AD8330ACPZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD8330ACPZ-R2.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:251
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Product details
Overview
AD8330ACPZ-R2 from Analog Devices is a wideband, fully differential variable gain amplifier (VGA) operating from DC to 150 MHz with constant bandwidth across all gains, 0 dB to 50 dB linear-in-dB gain control via VDBS pin, 5 nV/√Hz input-referred noise at max gain, and rail-to-rail differential outputs suitable for pre-ADC signal conditioning in high-speed data acquisition systems.
For engineers reviewing the AD8330ACPZ-R2 datasheet, AD8330ACPZ-R2 pinout, AD8330ACPZ-R2 application, or AD8330ACPZ-R2 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply support for industrial and test equipment design.
Technical Context
The AD8330ACPZ-R2 implements a translinear VGA core on a silicon-on-insulator complementary bipolar process, enabling precise exponential current control for linear-in-dB gain scaling while maintaining constant 150 MHz bandwidth regardless of gain setting. Its dual-control architecture separates decibel gain (VDBS) from amplitude scaling (VMAG), allowing independent adjustment of gain slope and absolute output level.
It features fully differential signal paths with 1 kΩ differential input impedance, 150 Ω differential output impedance, internal offset compensation (OFST pin), and programmable common-mode output control (CNTR pin), supporting both AC- and DC-coupled operation with <±0.1 dB gain linearity error over 0.3 V–1.2 V VDBS range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 150 MHz at all gains - ensures consistent pulse response and gain law conformance up to RF frequencies without peaking or roll-off. |
| Gain Range (dB mode) | 0 dB to 50 dB (30 mV/dB) - enables precise AGC implementation with ±0.1 dB linearity over 0.3–1.2 V VDBS range. |
| Input Noise Density | 5 nV/√Hz typical at max gain - supports low-level signal amplification before ADC without degrading SNR. |
| Differential Output Swing | ±2 V peak (4 V p-p) - drives 75 Ω cables or ADC inputs directly with headroom for 1 V rms sine waves. |
| Supply Voltage Range | 2.7 V to 6 V - compatible with single-supply 3.3 V and 5 V systems, consuming only 20 mA typical at 5 V. |
| Distortion (HD2) | ≤−62 dBc at 10 MHz, 1 V p-p - meets requirements for medium-fidelity signal chains in instrumentation and comms. |
| Power-Down Current | 20 µA in full shutdown - enables low-power standby modes in battery-operated or energy-conscious designs. |
Pinout & Package
AD8330ACPZ-R2 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 PCB 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 for input section; decouples supply noise from gain core. |
| INHI / INLO | Differential signal inputs (±) | Accepts ±2 V peak differential or single-ended signals; 1 kΩ input impedance, 4 pF capacitance. |
| MODE | Gain slope polarity control | High = gain increases with VDBS; low = gain decreases - enables inverted AGC behavior. |
| VDBS | Linear-in-dB gain control voltage | 0–1.5 V sets 0–50 dB gain at 30 mV/dB; 100 nA bias current allows high-impedance DAC drive. |
| VMAG | Linear gain scaling voltage | 0–5 V adjusts nominal gain factor from ×0.03 to ×10; default 0.5 V yields ×1 scaling. |
| OPHI / OPLO | Differential signal outputs (±) | Drive 75 Ω loads; rail-to-rail swing; 150 Ω differential output impedance. |
| CNTR | Common-mode output voltage control | 0.5–4.5 V sets output common-mode level; defaults to VS/2 when open. |
| OFST | Offset compensation enable | Unconnected = auto-offset correction active; grounded = disabled for DC-coupled precision apps. |
| ENBL | Power enable (active high) | Logic high = full operation; 1.3–1.7 V = hibernate (1.5 mA); <0.5 V = full shutdown (20 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Constant bandwidth architecture | 150 MHz small-signal –3 dB point maintained across full 0–50 dB gain range - eliminates frequency-dependent gain errors in wideband AGC loops. |
| Dual independent gain controls | VDBS sets dB gain slope; VMAG scales absolute gain magnitude - enables repositioning of 0–50 dB range anywhere within >100 dB total span (e.g., –30 dB to +70 dB). |
| Low-noise translinear core | 5 nV/√Hz input-referred noise at maximum gain - preserves SNR for weak signals in ultrasound, radar, and spectrum analyzers. |
| Programmable output common-mode | CNTR pin accepts 0.5–4.5 V to set output DC level - matches diverse ADC input ranges (e.g., 0.5 V to 4.5 V) without external level-shifting circuitry. |
| Three power states | Full operation (20 mA), hibernate (1.5 mA), full shutdown (20 µA) - supports dynamic power management in portable and modular test equipment. |
Applications
| Pre-ADC Signal Conditioning | 75 Ω Cable Driving |
|---|---|
|
Use Scenario: Amplifying low-level sensor outputs (e.g., ultrasound transducers, photodiode front-ends) prior to digitization by a 12–16-bit ADC. IC Role / Device Role / Timing Role: Variable gain amplifier providing programmable signal scaling to maximize ADC dynamic range utilization. Use Value: Constant 150 MHz bandwidth ensures flat frequency response across gain settings, preventing distortion of transient pulses or modulated waveforms entering the ADC. |
Use Scenario: Driving long coaxial cables (e.g., in broadcast video, test equipment interconnects) requiring 75 Ω source termination. IC Role / Device Role / Timing Role: Differential line driver with matched 75 Ω output impedance per side and rail-to-rail swing. Use Value: Differential ROUT = 150 Ω (75 Ω per leg) enables direct 75 Ω cable driving without external resistors, reducing component count and layout complexity. |
| Automatic Gain Control (AGC) | Wide-Range True RMS Voltmeter |
|
Use Scenario: Closed-loop gain stabilization in RF receivers or optical power monitors where input signal amplitude varies over >60 dB. IC Role / Device Role / Timing Role: Core VGA element in feedback loop, with MODE pin enabling inverted gain control for stable loop dynamics. Use Value: 250 ns gain settling time to 0.5 dB error allows fast AGC response to burst signals, while low distortion preserves modulation fidelity. |
Use Scenario: Measuring true RMS voltage of complex waveforms (e.g., PWM, noise, modulated carriers) across decades of amplitude. IC Role / Device Role / Timing Role: Programmable gain stage preceding RMS-to-DC converter, enabling wide input range without range switching. Use Value: >100 dB effective gain range (via VMAG + VDBS combination) allows single-range measurement from µV to volt-level signals with consistent accuracy. |
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 bandwidth (up to 750 MHz), higher supply current (42 mA), no VMAG pin - gain controlled solely by VGN (linear-in-dB only). | Better suited for IF/RF gain control above 200 MHz; lacks amplitude-scaling flexibility of AD8330ACPZ-R2. | Select AD8370ACPZ-R7 when bandwidth >300 MHz is required and dual-control flexibility is unnecessary. |
| LMH6401IRGTR | DC–4.8 GHz bandwidth, integrated digital SPI interface, 3.3 V only, higher noise (9.5 nV/√Hz), no OFST/CNTR pins. | Targets high-frequency communications (5G, radar); requires digital control infrastructure; less suitable for precision DC-coupled or low-noise analog AGC. | Select LMH6401IRGTR for GHz-range applications with digital system integration; retain AD8330ACPZ-R2 for analog-controlled, low-noise, DC-capable designs. |
Compared with AD8370ACPZ-R7 and LMH6401IRGTR, AD8330ACPZ-R2 offers unique dual analog gain controls (VDBS + VMAG), sub-5 nV/√Hz noise, and comprehensive analog interface features (OFST, CNTR, MODE) ideal for precision wideband instrumentation - not just raw speed or digital convenience.
Availability
AD8330ACPZ-R2 is available at Aetrix Electronics and suitable for pre-ADC signal conditioning, 75 Ω cable driving, and automatic gain control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and test equipment programs.
Supply support for AD8330ACPZ-R2 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 decades of expertise in precision amplifiers and RF ICs.
The AD8330ACPZ-R2 belongs to Analog Devices' wideband variable gain amplifier product line, designed specifically for high-fidelity, DC-coupled signal chains in instrumentation, medical imaging, and automated test equipment where gain accuracy, noise, and bandwidth stability are critical.
FAQ
What is the primary function of the AD8330ACPZ-R2 in a signal chain?
The AD8330ACPZ-R2 serves as a wideband, fully differential variable gain amplifier that provides precise, programmable signal amplification from DC to 150 MHz. Its core function is to condition analog signals-scaling amplitude dynamically via analog voltage inputs (VDBS and VMAG)-prior to digitization or transmission. In the AD8330ACPZ-R2, this is achieved with constant bandwidth, low distortion, and rail-to-rail differential outputs, making it especially valuable in pre-ADC stages and AGC loops.
How does the AD8330ACPZ-R2 achieve constant bandwidth across its gain range?
The AD8330ACPZ-R2 achieves constant 150 MHz bandwidth using a proprietary translinear VGA core fabricated on a silicon-on-insulator complementary bipolar process. Unlike conventional VGAs that trade bandwidth for gain, its architecture maintains fixed pole locations through exponential current control of the gain-setting elements, ensuring identical small-signal frequency response whether configured for 0 dB or 50 dB gain. This behavior is verified in Figure 9 of the AD8330ACPZ-R2 datasheet.
Can the AD8330ACPZ-R2 drive a 75 Ω coaxial cable directly?
Yes, the AD8330ACPZ-R2 can drive a 75 Ω coaxial cable directly. Its differential output impedance is 150 Ω (75 Ω per leg), matching standard 75 Ω video and instrumentation cabling. When operated differentially into a 75 Ω load terminated at the far end, the AD8330ACPZ-R2 delivers full rail-to-rail swing with minimal reflection or loss-eliminating the need for external series resistors or transformers in many 75 Ω interface designs.
What is the role of the VMAG pin on the AD8330ACPZ-R2, and how does it differ from VDBS?
The VMAG pin on the AD8330ACPZ-R2 provides linear-in-magnitude gain scaling, adjusting the absolute gain factor from ×0.03 to ×10, while VDBS controls linear-in-dB gain (0–50 dB). VMAG shifts the entire VDBS-defined gain range up or down-e.g., applying 2 V to VMAG repositions the 0–50 dB span to 20–70 dB-enabling >100 dB total usable gain range. This dual-control scheme is unique to the AD8330ACPZ-R2 and not found in most competing VGAs.
Does the AD8330ACPZ-R2 support DC-coupled operation, and how is offset managed?
Yes, the AD8330ACPZ-R2 supports true DC-coupled operation. When the OFST pin is grounded, internal offset compensation is disabled, preserving DC accuracy. Input offset is typically 1 mV rms (drift 2 µV/°C), and output offset can be actively nulled via the OFST capacitor loop (corner as low as 5 Hz) or left unconnected for automatic correction. This DC capability makes the AD8330ACPZ-R2 suitable for precision applications like strain gauge amplification or DC servo loops.
AD8330ACPZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- 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-LFCSP-WQ (3x3)
AD8330ACPZ-R2 FAQ
1.How can I place an order for AD8330ACPZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8330ACPZ-R2 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 AD8330ACPZ-R2 reliable?
The price and inventory of AD8330ACPZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8330ACPZ-R2 is usually 5 days.
3.What payment methods are accepted for AD8330ACPZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8330ACPZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8330ACPZ-R2?
AD8330ACPZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8330ACPZ-R2 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 AD8330ACPZ-R2?
For technical support, including AD8330ACPZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8330ACPZ-R2 requirements.
6.How does Aetrix verify that AD8330ACPZ-R2 is sourced from the original manufacturer or authorized distributors?
All AD8330ACPZ-R2 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 AD8330ACPZ-R2 meets industry standards.
7.What is the process for return or replacement of AD8330ACPZ-R2?
All AD8330ACPZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD8330ACPZ-R2, 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 AD8330ACPZ-R2 part is unused and in its original packaging.
Return procedure for AD8330ACPZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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