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Texas Instruments UA733CNS
- Part No.:
- UA733CNS
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- -
- Datasheet:
-
UA733CNS.pdf
- Description:
- IC AMP VIDEO DIFF 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,165
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Product details
Overview
UA733CNS from Texas Instruments is a monolithic two-stage video amplifier with differential inputs/outputs, 200-MHz bandwidth, 250-kΩ input resistance, and selectable nominal gain of 10/100/400 V/V-designed for magnetic tape/disc systems using phase or NRZ encoding and high-speed memory interfaces.
For engineers reviewing the UA733CNS datasheet, UA733CNS pinout, UA733CNS application, or UA733CNS equivalent, this page delivers verified technical context, gain configuration logic, thermal derating data, differential output drive capability, and NS-package-specific layout considerations for legacy video and pulse amplification designs.
Technical Context
The UA733CNS employs internal series-shunt feedback to achieve wide bandwidth and low phase distortion across all gain settings; emitter-follower outputs enable stable driving of capacitive loads up to 100 pF without external compensation.
All stages are current-source biased to deliver high common-mode rejection (≥50 dB at 100 kHz) and supply-voltage rejection (≥50 dB), with gain selection achieved via internal resistor networks tied to GAIN ADJ pins 1A/1B/2A/2B-no external components required for nominal gains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 200 MHz at gain option 3 (400 V/V), enabling full NTSC/PAL video signal amplification without roll-off |
| Input Resistance | 250 kΩ differential, minimizing loading on preceding source stages in high-impedance signal paths |
| Gain Options | 10/100/400 V/V selectable via internal pin strapping-no external resistors needed for nominal settings |
| Supply Voltage | ±6 V typical; operates over ±4 V to ±8 V range, supporting standard dual-rail analog power domains |
| Output Swing | 4.7 VPP into 50 Ω load, sufficient for driving coaxial video lines or ADC front-ends |
| Propagation Delay | 3.6 ns at gain option 3, critical for timing-critical pulse amplification in memory read/write circuits |
| Common-Mode Rejection | ≥50 dB at 100 kHz, maintaining signal integrity in noisy industrial or instrumentation environments |
Pinout & Package
SOP (NS) package: 14-pin small-outline plastic, 0.150-inch body width, gull-wing leads, RoHS-compliant CU NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Differential input non-inverting | Accepts positive-phase video/pulse signal; referenced to midpoint of ±VCC rails |
| 2 (NC) | No internal connection | Unbonded pad-must remain unconnected per TI design; no routing or grounding |
| 3 (GAIN ADJ 2A) | Gain configuration terminal A | Strap to pin 4 (2B) for gain option 2 (100 V/V); open for gain option 3 (400 V/V) |
| 4 (GAIN ADJ 1A) | Gain configuration terminal A | Strap to pin 5 (1B) for gain option 1 (10 V/V); open for gain options 2 or 3 |
| 5 (VCC−) | Negative supply rail | Connect to −6 V rail; internal current sources reference this node for bias stability |
| 6 (NC) | No internal connection | Unbonded pad-leave floating; no PCB trace or thermal pad connection |
| 7 (OUT+) | Differential output non-inverting | Delivers amplified positive-phase signal; emitter-follower stage drives 50 Ω loads directly |
| 8 (IN−) | Differential input inverting | Accepts negative-phase signal; enables common-mode noise rejection when used differentially |
| 9 (NC) | No internal connection | Unbonded pad-no electrical or mechanical connection required |
| 10 (GAIN ADJ 2B) | Gain configuration terminal B | Strap to pin 3 (2A) for gain option 2 (100 V/V); open for gain option 3 (400 V/V) |
| 11 (GAIN ADJ 1B) | Gain configuration terminal B | Strap to pin 4 (1A) for gain option 1 (10 V/V); open for gain options 2 or 3 |
| 12 (VCC+) | Positive supply rail | Connect to +6 V rail; symmetric dual supply ensures balanced operation and CMRR performance |
| 13 (NC) | No internal connection | Unbonded pad-omit from layout; no thermal or electrical function |
| 14 (OUT−) | Differential output inverting | Delivers complementary amplified signal; enables transformerless transmission line driving |
Key Features
| Feature | Design Value |
|---|---|
| No external frequency compensation required | Stable operation at 200 MHz with all three gain options-eliminates risk of oscillation in high-speed layouts |
| Differential input/output architecture | Enables common-mode noise rejection >50 dB and direct interface to twisted-pair or transformer-coupled systems |
| Emitter-follower output stage | Drives 50 Ω coaxial cables or ADC inputs without external buffers-reduces component count and board space |
| Current-source biasing | Maintains consistent gain and offset across temperature (0°C to 70°C) and supply variations (±4 V to ±8 V) |
| Selectably fixed gain options | 10/100/400 V/V configured by simple pin strapping-avoids precision external resistors and associated tolerance drift |
Applications
| Magnetic Tape Playback Amplifier | NRZ Encoded Disc File Read Channel |
|---|---|
|
Use Scenario: Amplifying low-level analog signals from magnetic tape heads in legacy audio/data recorders. IC Role / Device Role / Timing Role: Differential video amplifier providing 100 V/V gain and 200-MHz bandwidth to preserve high-frequency content during playback. Use Value: Maintains signal fidelity across full tape bandwidth without external compensation-reducing design complexity and cost. |
Use Scenario: Recovering NRZ-encoded digital pulses from rotating disc storage systems with minimal jitter. IC Role / Device Role / Timing Role: High-speed pulse amplifier delivering 3.6 ns propagation delay and 4.7 VPP swing into 50 Ω loads. Use Value: Enables reliable clock/data recovery at multi-MHz rates without added buffer stages or layout sensitivity. |
| Thin-Film Memory Sense Amplifier | General-Purpose Video Line Driver |
|
Use Scenario: Amplifying weak voltage differentials from thin-film or plated-wire memory arrays during read operations. IC Role / Device Role / Timing Role: Differential amplifier with 250-kΩ input resistance and ≥50 dB CMRR to reject substrate noise in dense memory ICs. Use Value: Preserves signal-to-noise ratio in high-density memory subsystems where layout parasitics dominate. |
Use Scenario: Driving composite video signals over 75 Ω coaxial cables in broadcast or test equipment. IC Role / Device Role / Timing Role: Unity-gain stable video amplifier operating at 200 MHz with low phase shift (<5° at 10 MHz). Use Value: Delivers broadcast-grade video fidelity without external termination or equalization networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video and pulse amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MA | 350-MHz bandwidth, 1200-V/V max gain, SOIC-8 package, requires external compensation | Higher bandwidth but single-ended I/O; lacks differential output for transformerless transmission | Choose LMH6702MA only if >200-MHz bandwidth is mandatory and differential output is not required |
| THS3201D | 400-MHz bandwidth, 1500-V/V max gain, SOIC-8, current-feedback architecture, higher supply current (25 mA) | Superior speed but lower input impedance (1.2 kΩ) and no built-in gain selection-requires external resistors | Choose THS3201D only for ultra-high-speed pulse applications where gain flexibility and low input loading are secondary |
Compared with LMH6702MA and THS3201D, the UA733CNS provides integrated differential I/O, pin-strappable gain, and guaranteed 200-MHz operation without external compensation-making it uniquely suited for legacy magnetic storage and video line-driving applications where layout simplicity and deterministic performance are prioritized over raw bandwidth.
Availability
UA733CNS is available at Aetrix Electronics and suitable for magnetic tape playback systems, NRZ-encoded disc file read channels, and thin-film memory sense amplifiers requiring stable component supply and long-term obsolescence management.
Supply support for UA733CNS 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies since 1930.
The UA733CNS belongs to TI's legacy linear amplifier product line, engineered specifically for high-fidelity video, magnetic storage, and high-speed pulse amplification in industrial and instrumentation systems operating from 0°C to 70°C.
FAQ
What is the maximum operating temperature range for the UA733CNS?
The UA733CNS is characterized for operation from 0°C to 70°C ambient temperature. Its thermal resistance (θJA) is 76°C/W in the NS package, allowing safe operation at full rated power up to 70°C with appropriate PCB copper area. Exceeding 70°C ambient may cause gain drift or reduced reliability, as the device is not specified for extended military-range operation like the obsolete A733M variant.
How do I configure the UA733CNS for 100 V/V gain?
To configure the UA733CNS for 100 V/V gain, connect pin 3 (GAIN ADJ 2A) to pin 10 (GAIN ADJ 2B) using a short PCB trace or 0-Ω resistor, while leaving pins 4 (GAIN ADJ 1A) and 11 (GAIN ADJ 1B) unconnected. This activates gain option 2 per TI's SLFS027B datasheet Figure 6 and Table on page 4. Confirm with oscilloscope measurement at OUT+/OUT− under 1-V differential input.
Does the UA733CNS require external frequency compensation components?
No, the UA733CNS does not require external frequency compensation components for any of its three nominal gain options (10/100/400 V/V). Its internal series-shunt feedback architecture ensures unconditional stability up to 200 MHz, as confirmed in the "No Frequency Compensation Required" feature statement and electrical characteristics table on page 4 of SLFS027B. Adding external capacitors may degrade bandwidth or induce peaking.
What is the purpose of the NC pins on the UA733CNS NS package?
The UA733CNS NS package has four NC (no internal connection) pins: 2, 6, 9, and 13. These are unbonded die pads with no electrical function. TI's datasheet explicitly states they must remain unconnected-no routing, grounding, or thermal pad attachment is permitted. Connecting them risks internal damage or unpredictable behavior due to parasitic coupling.
Can the UA733CNS drive a 75-Ω video load directly?
Yes, the UA733CNS can drive a 75-Ω video load directly using its differential outputs (pins 7 and 14). With ±6-V supplies, it delivers up to 4.7 VPP into 50 Ω (page 4, VOPP parameter); into 75 Ω, expected swing is ~5.2 VPP based on load-line analysis. For broadcast compliance, use a 75-Ω series termination at the driver output and ensure proper PCB impedance control to avoid reflections.
UA733CNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- -
- Output Type:
- -
- Number of Circuits:
- -
- -3db Bandwidth:
- -
- Slew Rate:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply, Single/Dual (±):
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
UA733CNS FAQ
1.How can I place an order for UA733CNS through Aetrix?
Please submit a Request for Quotation (RFQ) for UA733CNS 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 UA733CNS reliable?
The price and inventory of UA733CNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA733CNS is usually 5 days.
3.What payment methods are accepted for UA733CNS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA733CNS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA733CNS?
UA733CNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA733CNS 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 UA733CNS?
For technical support, including UA733CNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA733CNS requirements.
6.How does Aetrix verify that UA733CNS is sourced from the original manufacturer or authorized distributors?
All UA733CNS 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 UA733CNS meets industry standards.
7.What is the process for return or replacement of UA733CNS?
All UA733CNS units undergo pre-shipment inspection (PSI). If there is an issue with UA733CNS, 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 UA733CNS part is unused and in its original packaging.
Return procedure for UA733CNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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