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Analog Devices Inc. AD8351ACPZ-R7
- Part No.:
- AD8351ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD8351ACPZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,928
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Product details
Overview
AD8351ACPZ-R7 from Analog Devices is a low-distortion differential RF/IF amplifier optimized for 70–240 MHz signal chains, delivering 10 dB gain (typ.), −79 dBc HD2 / −81 dBc HD3 at 70 MHz, and 31 dBm OIP3 into 150 Ω. It serves as a high-fidelity ADC driver in IF sampling receivers and SAW filter interfaces.
For engineers reviewing the AD8351ACPZ-R7 datasheet, AD8351ACPZ-R7 pinout, AD8351ACPZ-R7 application, or AD8351ACPZ-R7 equivalent, this page provides verified specifications, package-validated pin functions, real-world distortion performance at 70 MHz, and confirmed alternatives for differential gain block selection.
Technical Context
The AD8351ACPZ-R7 employs a fully differential transconductance architecture with internal 350 Ω feedback resistors and programmable gain via external RG (100 Ω for 10 dB). Its XFCB process enables 2.2 GHz −3 dB bandwidth at 12 dB gain and <3 ns settling time to 1%.
It supports adjustable output common-mode voltage (1.2 V to 3.8 V via VOCM), single-supply operation (3–5.5 V), and power-down control (PWUP ≥1.3 V). Input common-mode range is 1.2–3.8 V; output differential offset is 20 mV (typ.) with 0.13 mV/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 2.2 GHz at 12 dB gain - enables wideband IF amplification up to cellular/WiMAX bands without roll-off |
| Harmonic Distortion | −79 dBc HD2 / −81 dBc HD3 at 70 MHz - meets SFDR >78 dBc requirement for 14-bit ADC driving |
| OIP3 | 31 dBm at 70 MHz - supports high dynamic range in receiver front ends with strong interferers |
| Noise Spectral Density | 2.70 nV/√Hz RTI at 70 MHz - preserves SNR when driving 14-bit ADCs like AD6645 |
| Supply Current | 28 mA at 5 V - enables low-power RF gain staging in battery-sensitive or thermally constrained designs |
| Output Impedance | 150 Ω differential - matches standard RF terminations and simplifies interface to SAW filters or ADC inputs |
| Settling Time | <3 ns to 1% - supports fast-switching IF sampling and multiplexed signal paths |
Pinout & Package
The AD8351ACPZ-R7 is housed in a 16-lead LFCSP (3 mm × 3 mm, 0.8 mm height) with exposed pad soldered to ground. Pin 1 is RGP1; pins 5–8 and 14–15 are NC; EPAD is internally grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWUP (Pin 16) | Power-up enable input | Active-high logic control: ≥1.3 V activates amplifier; <0.8 V disables (60 dB isolation) |
| RGP1 / RGP2 (Pins 1 / 2) | Gain resistor terminals | Connect external RG (e.g., 100 Ω for 10 dB); sets differential voltage gain from 0–26 dB |
| INHI / INLO (Pins 3 / 4) | Differential input pair | AC-coupled balanced inputs biased to midsupply; 5 kΩ input resistance, 0.8 pF capacitance |
| VOCM (Pin 13) | Common-mode voltage reference | Sets DC bias of both inputs and outputs (1.2–3.8 V); decouple with 0.1 μF capacitor to ground |
| OPHI / OPLO (Pins 11 / 10) | Differential output pair | 150 Ω nominal differential output impedance; 4.75 V p-p max swing at 1 dB compression |
| VPOS (Pin 9) | Positive supply | 3–5.5 V single supply; quiescent current 28 mA (typ.) at 5 V |
| COMM (Pin 8) | Device common | Low-impedance ground connection point; must tie to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Gain set from 0 dB to 26 dB using one external RG (e.g., 100 Ω → 10 dB), eliminating complex feedback networks |
| Adjustable output common-mode | VOCM pin allows precise matching to ADC reference voltage (e.g., 2.4 V for AD6645), eliminating level-shifting circuitry |
| Fast overdrive recovery | <2 ns recovery from large-signal overdrive ensures clean transient response in burst-mode or pulsed IF systems |
| Power-down mode | PWUP pin reduces supply current to near-zero while maintaining 60 dB reverse isolation - ideal for TDD or channel-multiplexed architectures |
| Low noise + high linearity coexistence | 2.70 nV/√Hz input noise + 31 dBm OIP3 enables simultaneous high SNR and high SFDR in wideband receivers |
Applications
| Differential ADC Driver | SAW Filter Interface |
|---|---|
|
Use Scenario: Driving AD6645 14-bit, 105 MSPS ADC in IF sampling receiver with 70 MHz input tone. IC Role / Device Role / Timing Role: Differential gain block providing 10 dB gain, matched 150 Ω output, and 2.4 V common-mode output aligned to ADC VREF. Use Value: Achieves 78.2 dBc SFDR and 69.1 dB SNR - meets LTE/WiMAX baseband digitization requirements without balun-induced imbalance. |
Use Scenario: Interfacing to 190 MHz differential SAW filter in GSM/UMTS front end. IC Role / Device Role / Timing Role: Gain block with 150 Ω output impedance transformed to 50 Ω via series-L/shunt-C network for optimal filter Q and insertion loss. Use Value: Maintains filter center frequency accuracy and minimizes passband ripple by avoiding mismatch-induced reflections. |
| RF/IF Gain Block | Single-Ended-to-Differential Conversion |
|
Use Scenario: Cascaded gain stage in 70–140 MHz IF chain prior to mixer or demodulator. IC Role / Device Role / Timing Role: Wideband linear amplifier with flat gain (±0.2 dB to 400 MHz) and low group delay variation (<2 ps over 100 MHz). Use Value: Enables stable AGC loop design with predictable phase margin and minimal intermodulation buildup across multi-stage chains. |
Use Scenario: Converting single-ended 50 Ω DAC output to differential signal for high-speed ADC input. IC Role / Device Role / Timing Role: Single-ended input configured via INHI only; external RF feedback resistor balances outputs for second-order harmonic cancellation. Use Value: Delivers −77 dBc SFDR at 70 MHz - sufficient for 12-bit system accuracy without requiring costly baluns or transformers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential RF/IF amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6554MA/NOPB | Higher bandwidth (4 GHz), higher supply current (42 mA), fixed 10 dB gain; no VOCM or PWUP control | Better suited for >500 MHz IF or optical front ends; lacks common-mode adjustment for ADC interfacing | Select when absolute bandwidth >3 GHz is required and power budget allows; avoid when VOCM alignment or power gating is needed. |
| ADA4940-1ARZ | Lower bandwidth (600 MHz), lower distortion (−92 dBc HD2 at 70 MHz), rail-to-rail output; no power-down pin | Optimized for precision low-frequency ADC drivers (≤100 MHz); not rated for >200 MHz RF use | Select for sub-100 MHz high-SFDR applications where ultra-low distortion outweighs bandwidth; avoid for 200+ MHz IF stages. |
Compared with LMH6554MA/NOPB and ADA4940-1ARZ, the AD8351ACPZ-R7 uniquely balances 2.2 GHz bandwidth, programmable gain, VOCM control, and power-down capability - making it the only choice among the three for reconfigurable, low-power, ADC-coupled IF gain blocks operating up to 240 MHz.
Availability
AD8351ACPZ-R7 is available at Aetrix Electronics and suitable for IF sampling receivers, SAW filter interfaces, and differential ADC driver applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for AD8351ACPZ-R7 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 AD8351ACPZ-R7 belongs to Analog Devices' RF/IF differential amplifier product line, designed specifically for high-linearity, wideband gain blocks in communications transceivers, software-defined radios, and high-speed data acquisition systems.
FAQ
What is the recommended gain resistor value for 12 dB gain with AD8351ACPZ-R7?
The AD8351ACPZ-R7 achieves 12 dB gain with an external RG of 62 Ω (±1% tolerance) when driving a 150 Ω differential load. This value is specified in Figure 5 and Table 4 of the Rev. D datasheet. Using a 62 Ω resistor yields ±1 dB gain accuracy across temperature and supply variations, and maintains the 2.2 GHz −3 dB bandwidth characteristic.
Can AD8351ACPZ-R7 drive a 1 kΩ differential load effectively?
Yes, the AD8351ACPZ-R7 can drive a 1 kΩ differential load, delivering 10 dB gain with 200 MHz 0.1 dB flatness and −95 dBc HD2/−93 dBc HD3 at 10 MHz. However, bandwidth drops to 3 GHz at 6 dB gain and output swing is reduced versus 150 Ω loading; for optimal SFDR above 70 MHz, 150 Ω termination is preferred.
How does the PWUP pin function in AD8351ACPZ-R7 power-down mode?
The PWUP pin on AD8351ACPZ-R7 is a TTL/CMOS-compatible enable input: applying ≥1.3 V activates the amplifier; pulling ≤0.8 V disables it, reducing quiescent current to <100 μA and providing >60 dB reverse isolation. No external pull-down is required - the internal bias ensures reliable disable state.
What is the maximum input signal level before compression occurs in AD8351ACPZ-R7?
The AD8351ACPZ-R7 exhibits 1 dB compression at +13.3 dBm output (13.3 mW) for a 70 MHz tone into 150 Ω, corresponding to ~2.0 V p-p differential output. Input-referred 1 dB compression is approximately −10 dBm, assuming 10 dB gain. Exceeding this degrades SFDR and introduces measurable third-order IMD.
Is AD8351ACPZ-R7 compatible with 3.3 V supply operation?
Yes, AD8351ACPZ-R7 operates fully specified from 3 V to 5.5 V. At 3.3 V, it delivers 2.75 nV/√Hz noise, −80 dBc HD2/−69 dBc HD3 at 70 MHz, and 29 dBm OIP3 - all within datasheet limits. Quiescent current drops to ~22 mA, enabling lower-power IF gain staging without sacrificing linearity.
AD8351ACPZ-R7 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:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 13000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2.2 GHz
- Current - Input Bias:
- 15 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 28mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-WQ (3x3)
AD8351ACPZ-R7 FAQ
1.How can I place an order for AD8351ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8351ACPZ-R7 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 AD8351ACPZ-R7 reliable?
The price and inventory of AD8351ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8351ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8351ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8351ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8351ACPZ-R7?
AD8351ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8351ACPZ-R7 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 AD8351ACPZ-R7?
For technical support, including AD8351ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8351ACPZ-R7 requirements.
6.How does Aetrix verify that AD8351ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8351ACPZ-R7 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 AD8351ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8351ACPZ-R7?
All AD8351ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8351ACPZ-R7, 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 AD8351ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8351ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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