My Inquiry
My Account
Analog Devices Inc. AD8320ARP
- Part No.:
- AD8320ARP
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-PowerSOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD8320ARP.pdf
- Description:
- IC LINE DVR VARIABLE GAIN 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:44,482
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8320ARP from Analog Devices is a digitally controlled variable gain line driver IC optimized for coaxial cable return-path (upstream) driving in HFC networks. It delivers 36 dB gain range (–10 dB to +26 dB), 150 MHz –3 dB bandwidth, 22.5 dBm 1 dB compression point at 12 V supply, and maintains constant 75 Ω output impedance during power-up/down-enabling direct 75 Ω cable drive without external back-termination. It serves as the final-stage amplifier in cable modem upstream signal chains.
For engineers reviewing the AD8320ARP datasheet, AD8320ARP pinout, AD8320ARP application, or AD8320ARP equivalent, key selection considerations include its SPI-compatible 8-bit serial gain control interface, 75 Ω dynamic output impedance behavior, distortion performance (–57 dBc SFDR at 42 MHz/12 dBm), single-supply operation (5 V to 12 V), and thermal-enhanced 20-lead SOIC package with –40°C to +85°C rating.
Technical Context
The AD8320ARP integrates a fixed-gain input buffer/inverter (6 dB), an 8-bit digitally controlled differential attenuator core (0 dB to –36 dB), and a high-power output amplifier (20 dB gain in power-up mode), yielding total gain from –10 dB to +26 dB. Its linear V/V/LSB gain response follows AV = 0.316 + 0.077 × Code (Code = 0–255).
It operates in two distinct modes: forward (PD = 1) enables the output amplifier and sets VOUT dc bias to VCC/2; reverse (PD = 0) disables the output stage and activates a dedicated reverse amplifier to hold VOUT at VCC/2 while maintaining 75 Ω output impedance-minimizing reflections during power-down transitions in multiplexed HFC systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 36 dB (–10 dB to +26 dB): enables precise upstream signal level adjustment across varying cable lengths in HFC networks. |
| Bandwidth (–3 dB) | 150 MHz: supports full DOCSIS-compliant upstream frequency bands (5–65 MHz) with margin for harmonics and filtering. |
| 1 dB Compression Point | 22.5 dBm @ 12 V: delivers +18 dBm clean output into 75 Ω load, meeting high-power upstream modulation requirements. |
| Output Impedance | 75 Ω (power-up & power-down): eliminates need for external 75 Ω back-termination resistor, doubling effective output voltage swing. |
| Worst Harmonic Distortion | –57 dBc @ 42 MHz / 12 dBm / 12 V: ensures compliance with spectral mask and SFDR requirements for QPSK/QAM upstream signals. |
| Supply Voltage Range | +5 V to +12 V: allows flexible system-level power architecture while enabling higher output power and lower distortion at elevated rails. |
| Quiescent Current | 97 mA @ 12 V (power-up), 32 mA @ 12 V (power-down): supports low-power standby in multi-drop cable telephony applications. |
Pinout & Package
AD8320ARP is housed in a thermally enhanced 20-lead SOIC (RP-20) package with exposed pad for improved thermal dissipation, rated for –40°C to +85°C operation and specified at θJA = 53°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDATA) | Serial data input | MSB-first 8-bit gain word loading; TTL/CMOS compatible; enables SPI-like programming without external controller overhead. |
| 2 (CLK) | Serial clock input | Edge-triggered clock (min 32 ns period); controls timing of gain word shift-in; requires valid SDATA setup/hold per Figure 2. |
| 3 (DATEN) | Data enable (active-low) | Asynchronous latch strobe: falling edge initiates 8-bit load; rising edge transfers word to attenuator core with ~30 ns settling. |
| 6, 11, 12, 13, 15, 16 (GND) | Ground reference | Six dedicated ground pins minimize ground bounce and ensure stable 75 Ω output impedance integrity across frequency. |
| 7, 8, 9, 17, 20 (VCC) | Positive supply | Five independent VCC pins reduce supply impedance; require individual 0.1 µF decoupling for broadband noise suppression. |
| 10 (VOUT) | Differential output (single-ended) | DC-biased at VCC/2; drives 75 Ω coax directly; no external termination needed due to on-chip 75 Ω dynamic impedance synthesis. |
| 14 (BYP) | Internal bypass node | Must be ac-decoupled with 0.1 µF capacitor to stabilize internal bias network and suppress supply ripple coupling. |
| 18 (VREF) | Input reference voltage | Provides 1.9 V dc bias for VIN; must be decoupled with 0.1 µF cap; enables dc-coupled input configurations when buffered. |
| 19 (VIN) | Analog input | 220 Ω input impedance; accepts up to 0.310 V p-p full-scale signal; requires external 115 Ω shunt for 75 Ω system matching. |
| 4, 5 (VOCM) | Output common-mode reference | Supplies VCC/2 dc level for VOUT; requires 0.1 µF decoupling; enables dc-coupled output paths when buffered. |
| 19 (PD) | Power-down control (active-low) | Asynchronous shutdown: disables output amplifier in 45 ns; activates reverse amplifier to maintain 75 Ω and VCC/2 at VOUT. |
Key Features
| Feature | Design Value |
|---|---|
| Constant 75 Ω output impedance | Maintains matched termination during power-up/down transitions-eliminates external back-termination and reduces PCB area/cost. |
| Low-glitch power switching | Power-down pedestal offset ±30 mV and <5 mV p-p clock feedthrough enable clean channel switching in time-division multiplexed upstream systems. |
| V/V/LSB linear gain scaling | Gain = 0.316 + 0.077 × Code ensures predictable analog-domain gain control without lookup tables or calibration. |
| Integrated reverse amplifier | Active during PD = 0 to hold VOUT at VCC/2 and 75 Ω-prevents reflections and preserves diplexer/filter stability in shared bus topologies. |
| Thermally enhanced SOIC | RP-20 package with θJA = 53°C/W supports sustained +18 dBm output into 75 Ω at +85°C ambient without derating. |
Applications
| Cable Modem Upstream Driver | HFC Cable Telephony |
|---|---|
Use Scenario: Driving upstream QPSK/QAM-modulated signals (5–65 MHz) from AD9853 or DAC through diplexer onto coaxial plant to headend. IC Role / Device Role / Timing Role: Final-stage digitally controlled line driver with programmable gain compensation for varying subscriber loop loss. Use Value: 36 dB gain range and –57 dBc SFDR at 42 MHz allow precise amplitude control and spectral purity required by DOCSIS 3.0/3.1 upstream specifications. | Use Scenario: Transmitting voice-band or high-speed data upstream in hybrid fiber-coax telephony systems with dynamic channel allocation. IC Role / Device Role / Timing Role: Return-path amplifier supporting burst-mode transmission with fast gain update (<30 ns) and low-power idle (32 mA @ 12 V). Use Value: Asynchronous PD pin enables rapid channel switching between subscribers; constant 75 Ω output prevents echo and crosstalk during state transitions. |
| Interactive Set-Top Box Return Path | PC Plug-In Cable Modem |
Use Scenario: Enabling two-way communication in digital video services by amplifying upstream telemetry, EPG updates, or VoD requests over coax. IC Role / Device Role / Timing Role: Low-distortion, digitally adjustable driver interfacing with QPSK modulator and diplexer in compact STB RF section. Use Value: 150 MHz bandwidth accommodates future upstream spectrum expansion; 22.5 dBm P1dB supports high-margin signal injection into noisy plant environments. | Use Scenario: Integrating upstream signal conditioning into USB- or PCIe-based cable modem adapters for consumer PCs. IC Role / Device Role / Timing Role: Single-supply (5–12 V), SPI-programmable line driver minimizing BOM count and layout complexity in space-constrained designs. Use Value: Thermally enhanced RP-20 package and integrated 75 Ω output eliminate heatsinks and termination resistors-reducing bill-of-materials and assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8321ACPZ-R7 | Same architecture but 16-lead LFCSP (3 mm × 3 mm); lower θJA (42°C/W); identical gain range, bandwidth, and distortion specs. | Preferred for space-constrained, high-density PCBs requiring better thermal performance; not pin-compatible with AD8320ARP. | Select AD8321ACPZ-R7 when board area or thermal headroom is critical; verify layout compatibility with LFCSP footprint and solder reflow profile. |
| LMH6502MA/NOPB | Analog-controlled (voltage-input) VGA; 30 dB gain range; 1.8 GHz bandwidth; higher quiescent current (120 mA); no integrated 75 Ω output impedance. | Suitable for wideband test equipment or non-HFC applications where analog gain control suffices and external termination is acceptable. | Choose LMH6502MA/NOPB only if digital serial control and constant 75 Ω output are not required; expect added components for termination and DAC interface. |
Compared with AD8320ARP, AD8321ACPZ-R7 offers superior thermal efficiency in smaller form factor but requires PCB redesign, while LMH6502MA/NOPB trades digital control and integrated impedance for wider bandwidth and analog simplicity-neither is a drop-in replacement, but both address overlapping upstream driver use cases with distinct trade-offs.
Availability
AD8320ARP is available at Aetrix Electronics and suitable for HFC cable modem design, interactive set-top box development, and PC plug-in modem manufacturing requiring stable component supply, long-term lifecycle support, and traceable sourcing for DOCSIS-compliant products.
Supply support for AD8320ARP 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 AD8320ARP belongs to Analog Devices' high-speed line driver product line, engineered specifically for broadband return-path amplification in cable infrastructure-balancing gain precision, distortion performance, and impedance stability under dynamic power conditions.
FAQ
What is the operating temperature range for the AD8320ARP?
The AD8320ARP is rated for continuous operation from –40°C to +85°C, as confirmed in the Ordering Guide section of the official datasheet. This industrial-grade temperature range ensures reliable performance in outdoor cable plant equipment, set-top boxes, and telecom infrastructure where ambient conditions vary significantly. The device's gain drift is specified at ±0.5 mdB/°C, and distortion remains within spec across this full range.
Does the AD8320ARP require external termination resistors when driving a 75 Ω coaxial cable?
No, the AD8320ARP does not require external 75 Ω back-termination resistors. Its on-chip circuitry actively maintains a dynamic 75 Ω output impedance during both power-up and power-down states, as verified in the Output Characteristics table and Applications section. This feature eliminates reflection-related distortion and doubles effective output voltage swing compared to conventional op-amp drivers-directly enabling 75 Ω coax drive per Figure 45.
How fast can the gain of the AD8320ARP be updated?
The AD8320ARP achieves gain settling within 30 ns after the DATEN pin transitions high, as measured from minimum-to-maximum gain change with 0.31 V p-p input (Spec Table, "Output Settling to 1 mV"). The full 8-bit serial load cycle requires eight CLK pulses (minimum 32 ns period), so total programming latency is ~256 ns plus DATEN assertion time. This speed supports real-time upstream power control in burst-mode HFC systems.
What is the purpose of the PD (Power-Down) pin on the AD8320ARP?
The PD pin on the AD8320ARP is an asynchronous active-low control that switches the device between forward (PD = 1) and reverse (PD = 0) modes. In forward mode, the output amplifier is enabled and VOUT delivers amplified signal. In reverse mode, the output amplifier shuts down in 45 ns and a dedicated reverse amplifier holds VOUT at VCC/2 while maintaining 75 Ω impedance-preventing reflections in multiplexed upstream channels.
Can the AD8320ARP operate from a 5 V supply and still meet full performance specifications?
Yes, the AD8320ARP is fully specified for operation from +5 V to +12 V. At +5 V, it delivers 16 dBm 1 dB compression point, –43 dBc worst harmonic distortion at 42 MHz/12 dBm, and maintains full 36 dB gain range. However, distortion improves and output power increases with higher supply voltage-so +5 V is viable for lower-power applications, while +12 V is recommended for maximum SFDR and +18 dBm output capability.
AD8320ARP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-PowerSOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-PowerSOIC
AD8320ARP FAQ
1.How can I place an order for AD8320ARP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8320ARP 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 AD8320ARP reliable?
The price and inventory of AD8320ARP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8320ARP is usually 5 days.
3.What payment methods are accepted for AD8320ARP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8320ARP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8320ARP?
AD8320ARP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8320ARP 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 AD8320ARP?
For technical support, including AD8320ARP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8320ARP requirements.
6.How does Aetrix verify that AD8320ARP is sourced from the original manufacturer or authorized distributors?
All AD8320ARP 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 AD8320ARP meets industry standards.
7.What is the process for return or replacement of AD8320ARP?
All AD8320ARP units undergo pre-shipment inspection (PSI). If there is an issue with AD8320ARP, 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 AD8320ARP part is unused and in its original packaging.
Return procedure for AD8320ARP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8320ARP Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
