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Analog Devices Inc. AD8369ARUZ
- Part No.:
- AD8369ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8369ARUZ.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:277
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Product details
Overview
AD8369ARUZ from Analog Devices is a high-performance digitally controlled variable gain amplifier (VGA) operating from LF to 600 MHz with 45 dB gain range in precise 3 dB steps, −5 dB to +40 dB into 1 kΩ, 37 mA quiescent current at 5 V, and differential 200 Ω input/output impedance - used in IF sampling receivers and cellular base station signal chains.
For engineers reviewing the AD8369ARUZ datasheet, AD8369ARUZ pinout, AD8369ARUZ application, or AD8369ARUZ equivalent, this page delivers verified technical context, real-world interface behavior, gain flatness over 380 MHz bandwidth, power-down <1 mA operation, and validated alternatives for RF receiver front-end design.
Technical Context
The AD8369ARUZ implements a patented X-AMP® architecture combining a 6 dB-step R-2R ladder attenuator with a post-amplifier 3 dB interpolating stage to achieve accurate 3 dB gain steps across its full 45 dB span. Its fully differential signal path features internally biased INHI/INLO and OPHI/OPLO ports referenced to VS/2 and CMDC.
Digital control is selectable via SENB pin: parallel mode uses BIT3–BIT0 with DENB latch edge, serial mode repurposes BIT0 as data and BIT1 as clock. Gain step response time is 30 ns, and power-up settling occurs within 7 ms after PWUP high transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | LF to 600 MHz (−3 dB bandwidth maintained across all gain codes) |
| Gain Control Span | 45 dB (−5 dB to +40 dB into 1 kΩ load; −10 dB to +35 dB into 200 Ω) |
| Gain Step Accuracy | ±0.05 dB (ensures predictable system-level gain calibration without per-unit trimming) |
| Input/Output Impedance | 200 Ω differential (enables direct interface with 50 Ω systems via 2:1 balun or matching network) |
| Quiescent Current | 37 mA at 5 V (supports stable thermal performance in continuous-receive applications) |
| Power-Down Current | <1 mA (enables rapid sleep/wake cycles in TDD or burst-mode receivers) |
| Output IP3 | +19.5 dBm at 70 MHz (defines third-order linearity headroom for multi-carrier IF signals) |
Pinout & Package
AD8369ARUZ is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), rated for −40°C to +85°C industrial operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INHI / INLO | Differential RF Input | Balanced, ac-coupled inputs biased to ~1.7 V (VS/2 − 0.7 V); require external 0.1 µF coupling caps or transformer |
| OPHI / OPLO | Differential RF Output | Balanced, ac-coupled outputs biased to VS/2; support direct ADC interface if common-mode levels match |
| BIT0–BIT3 | Digital Gain Control | Parallel data inputs (BIT3 MSB); in serial mode, BIT0 = data, BIT1 = clock, BIT2/BIT3 unused |
| SENB | Interface Mode Select | Low = parallel mode; high = serial mode; determines functional mapping of BIT0–BIT1 pins |
| DENB | Data Enable Latch | Falling edge latches parallel data; rising edge transfers serial shift register to gain control register |
| PWUP | Power-Up Control | High = active (37 mA IQ); low = power-down (<1 mA); 7 ms enable delay to output stability |
| CMDC | Common-Mode Decoupling | Provides buffered VS/2 reference; requires ≥0.01 µF capacitor to COMM for improved single-ended rejection |
| FILT | Offset Loop Corner Set | External capacitor sets high-pass corner of internal offset nulling loop (e.g., 0.1 µF → ~156 Hz) |
| VPOS | Supply Voltage | 3.0 V to 5.5 V; requires local 0.1 µF ceramic decoupling adjacent to pin |
| COMM (Pins 2 & 15) | Device Common | Must connect to low-impedance ground plane; serves as return for bias, supply, and signal paths |
Key Features
| Feature | Design Value |
|---|---|
| Digitally controlled 3 dB gain steps | Enables precise, repeatable RF gain setting without analog control voltage drift or DAC nonlinearity |
| 45 dB total gain range with ±0.05 dB step accuracy | Supports closed-loop AGC designs requiring sub-dB resolution across wide dynamic range |
| 380 MHz gain flatness ≤ ±0.2 dB | Preserves amplitude integrity across multi-MHz IF bandwidths in zero-IF or complex-sampling architectures |
| Differential 200 Ω I/O with internal biasing | Reduces external component count by eliminating DC-blocking and level-shifting circuitry in balanced topologies |
| Serial or parallel digital interface via single-pin mode select | Allows flexible integration into FPGA-, microcontroller-, or ASIC-based control subsystems without redesign |
| Power-down current <1 mA | Enables low-duty-cycle operation in battery-powered or energy-constrained wireless infrastructure modules |
Applications
| Cellular/PCS Base Stations | IF Sampling Receivers |
|---|---|
Use Scenario: Wideband downconversion chain in macrocell BTS where variable gain compensates path loss and interference variations across multiple carriers. IC Role / Device Role / Timing Role: Digitally controlled VGA placed between mixer and ADC to maintain optimal ADC input level under varying RF conditions. Use Value: 45 dB range and 30 ns gain step response allow fast AGC loop closure; 600 MHz bandwidth supports multi-band LTE/NR channel aggregation. |
Use Scenario: Direct IF sampling architecture digitizing 70 MHz or 140 MHz intermediate frequencies with high spurious-free dynamic range. IC Role / Device Role / Timing Role: Final gain stage before ADC, providing programmable scaling to maximize ENOB while avoiding clipping. Use Value: +19.5 dBm OIP3 at 70 MHz and ±0.1 dB gain flatness over ±20 MHz ensure clean spectral representation for wideband FFT analysis. |
| Fixed Wireless Access | Instrumentation |
Use Scenario: Point-to-multipoint outdoor CPE unit requiring robust gain control across temperature and supply voltage variation. IC Role / Device Role / Timing Role: Signal conditioning VGA in receive path, interfacing with SAW filter and high-speed ADC. Use Value: Gain error ≤ ±0.2 dB over −40°C to +85°C (TPC 25–29) ensures stable calibration without field recalibration. |
Use Scenario: Modular test equipment (e.g., spectrum analyzer front-end or vector signal analyzer) needing repeatable, calibrated gain steps. IC Role / Device Role / Timing Role: Precision gain element in automated measurement signal chain with digital step control and traceable flatness. Use Value: ±0.05 dB gain step accuracy and 380 MHz flatness support metrology-grade amplitude accuracy per IEEE 1057. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VGA applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADL5330ACPZ-R7 | 30 dB gain range (−3 dB to +27 dB), 2.5 GHz bandwidth, 5 V supply only, no power-down pin | Better suited for higher-frequency microwave IF stages (>1 GHz), but lacks low-power shutdown and fine 3 dB steps | Select when bandwidth >1 GHz is required and 45 dB range is not critical; verify layout compatibility with 32-lead LFCSP |
| LMH6514MA/NOPB | Analog-controlled VGA (0–1.2 V Vgain), 2 GHz bandwidth, 2.7–5.25 V supply, 35 mA IQ | Requires external DAC and loop filter for digital control; superior bandwidth but lower gain accuracy and no integrated power-down | Choose for ultra-wideband analog AGC loops where digital interface complexity must be minimized |
Compared with AD8369ARUZ, ADL5330 offers wider bandwidth but narrower gain range and no low-power state, while LMH6514 provides analog control flexibility at the cost of added external components and reduced step precision - making AD8369ARUZ optimal for digitally managed, power-conscious 600 MHz-class IF amplification.
Availability
AD8369ARUZ is available at Aetrix Electronics and suitable for cellular base stations, IF sampling receivers, fixed wireless access units, and instrumentation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AD8369ARUZ 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 AD8369ARUZ belongs to Analog Devices' RF & Microwave VGAs product line, engineered specifically for high-linearity, digitally programmable gain control in communications receiver signal chains from baseband to 600 MHz.
FAQ
What is the maximum operating frequency of the AD8369ARUZ?
The AD8369ARUZ maintains a −3 dB bandwidth of 600 MHz across all gain settings, confirmed in the "Frequency Range" specification and TPC 2. At 380 MHz, gain flatness remains within ±0.15 dB (Rev. A datasheet, p.4), and usable small-signal gain extends beyond 500 MHz even at minimum gain code. This makes AD8369ARUZ suitable for wideband IF applications up to UHF.
Does the AD8369ARUZ support both serial and parallel digital interfaces?
Yes, the AD8369ARUZ supports both modes via the SENB pin: connecting SENB to COMM selects parallel mode (BIT3–BIT0 as data lines), while connecting SENB to VPOS enables serial mode (BIT0 = data, BIT1 = clock). The interface mode is hardware-selectable with no configuration register required - a key differentiator of AD8369ARUZ versus software-configured VGAs.
What is the power consumption of the AD8369ARUZ in active and power-down states?
In active state (PWUP = high), AD8369ARUZ draws 37 mA typical at 5 V (42 mA max), corresponding to ~185 mW. In power-down state (PWUP = low), it consumes ≤750 µA at 25°C and ≤1 mA across −40°C to +85°C (Rev. A datasheet, p.2). This <1 mA shutdown current enables aggressive power gating in TDD systems without sacrificing startup speed.
How does gain accuracy vary with temperature and frequency for the AD8369ARUZ?
AD8369ARUZ exhibits ≤±0.2 dB gain error over −40°C to +85°C at 70 MHz (TPC 25–29), and gain flatness stays within ±0.15 dB up to 380 MHz (p.4). At 600 MHz, gain drops to −3 dB point but retains monotonic step behavior. The 3 dB step accuracy remains ±0.05 dB across temperature and frequency - critical for closed-loop AGC stability in deployed infrastructure.
Can the AD8369ARUZ drive an ADC directly without external level-shifting?
Yes - the AD8369ARUZ outputs are biased at VS/2 (e.g., 2.5 V for 5 V supply), matching common mid-supply referenced ADC inputs. With proper ac-coupling or dc-coupling compatibility verification (e.g., AD92xx series), AD8369ARUZ can interface directly to ADCs without op-amp buffers or level translators, reducing noise, distortion, and board area. CMDC decoupling is recommended to stabilize common-mode voltage.
AD8369ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- X-AMP®
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1200V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 600 MHz
- Current - Input Bias:
- 160 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 37mA
- 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-TSSOP
AD8369ARUZ FAQ
1.How can I place an order for AD8369ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8369ARUZ 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 AD8369ARUZ reliable?
The price and inventory of AD8369ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8369ARUZ is usually 5 days.
3.What payment methods are accepted for AD8369ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8369ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8369ARUZ?
AD8369ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8369ARUZ 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 AD8369ARUZ?
For technical support, including AD8369ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8369ARUZ requirements.
6.How does Aetrix verify that AD8369ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8369ARUZ 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 AD8369ARUZ meets industry standards.
7.What is the process for return or replacement of AD8369ARUZ?
All AD8369ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8369ARUZ, 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 AD8369ARUZ part is unused and in its original packaging.
Return procedure for AD8369ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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