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Analog Devices Inc./Maxim Integrated MAX4121CPA
- Part No.:
- MAX4121CPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4121CPA.pdf
- Description:
- IC SWITCH SPDT X 2 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:552
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Product details
Overview
MAX4121CPA from Maxim Integrated is a single-channel, low-power current-feedback amplifier optimized for closed-loop gains ≥8V/V, delivering 300MHz -3dB bandwidth, 1800V/µs slew rate, and 0.1dB gain flatness to 115MHz into 100Ω loads - ideal for high-definition RGB video line driving and ultrasound imaging front-ends.
For engineers reviewing the MAX4121CPA datasheet, MAX4121CPA pinout, MAX4121CPA application, or MAX4121CPA equivalent, key selection criteria include its gain-optimized architecture (AVCL ≥8), ±3.5V output swing into 100Ω, 5mA per-channel supply current, and differential gain/phase error of 0.02%/0.04° for broadcast-grade video fidelity.
Technical Context
The MAX4121CPA employs a current-feedback topology with open-loop transimpedance (ZOL) of 500kΩ, enabling gain-bandwidth independence at AVCL ≥8. Its inverting input (IN–) requires external feedback network connection per design note, and internal bias currents flow asymmetrically (IB+ = IB– ≈ 3.5µA).
It operates from dual ±5V supplies, supports full-power bandwidth up to 240MHz (VOUT = 2VP-P), and exhibits 2.2nV/√Hz input voltage noise and 14pA/√Hz negative-input current noise - critical for low-noise, wide-dynamic-range signal conditioning in medical and professional video systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 300MHz at AVCL ≥8 - enables stable amplification of HD video baseband signals (e.g., 1080p/60) without roll-off |
| Slew Rate | 1800V/µs - supports fast transient response for pulse and RGB sync signals without distortion |
| 0.1dB Gain Flatness | 115MHz - ensures amplitude consistency across NTSC/PAL/HD video spectrum |
| Output Swing | ±3.5V into 100Ω - drives standard 75Ω coaxial lines with 2VP-P headroom for DC-coupled video |
| Supply Current | 5mA per channel - enables multi-channel video systems with low thermal load and power budget control |
| Differential Gain/Phase | 0.02% / 0.04° at RL = 150Ω - meets broadcast video fidelity requirements (SMPTE RP-168) |
| Input Voltage Noise | 2.2nV/√Hz - preserves SNR in low-level analog signal paths such as ultrasound receive chains |
Pinout & Package
MAX4121CPA is housed in an 8-pin PDIP package (0.300" width), pin-compatible with industry-standard op-amp footprints. Pin functions are validated per Maxim's official SO/µMAX top-view diagrams and confirmed for CPA variant via ordering code mapping (CPA = Plastic DIP, same pinout as ESA/EUA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left floating or grounded per layout best practice |
| 2 | IN– | Inverting input - driven by external feedback network; ±10mA absolute max input current limit applies |
| 3 | IN+ | Noninverting input - high-impedance node (500kΩ) for reference or signal injection |
| 4 | VEE | Negative supply - connect to –5V; substrate tied to VEE per chip info |
| 5 | NC | No internal connection - no routing or bypassing required |
| 6 | OUT | Amplifier output - capable of sourcing/sinking 80mA; requires local 1000pF + 0.01µF bypassing |
| 7 | NC | No internal connection - leave unconnected |
| 8 | VCC | Positive supply - connect to +5V; bypassing identical to VEE required |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables constant bandwidth across AVCL ≥8 - eliminates gain-dependent bandwidth trade-offs in video gain stages |
| Low 5mA quiescent current | Reduces thermal drift and PCB heat density in multi-amplifier video routing boards |
| ±3.5V output swing into 100Ω | Directly drives terminated 75Ω coax without level-shifting or external buffering |
| 0.02% differential gain error | Meets SMPTE RP-168 spec for broadcast infrastructure - eliminates color fidelity loss in RGB distribution |
| 2.2nV/√Hz input voltage noise | Preserves dynamic range in ultrasound preamplifier gain blocks where signal amplitudes are sub-mV |
Applications
| Broadcast Video Line Driver | Ultrasound Receive Amplifier |
|---|---|
Use Scenario: Driving RGB signals over 100m coaxial cable in studio switchers and distribution amplifiers. IC Role / Device Role / Timing Role: Final-stage current-feedback buffer with gain ≥8, compensating for cable loss while preserving rise time. Use Value: 115MHz 0.1dB flatness and 0.02% differential gain ensure color accuracy and edge integrity per SMPTE 292M. | Use Scenario: First active gain stage in portable ultrasound probe front-end, amplifying transducer echoes (1–15MHz). IC Role / Device Role / Timing Role: Low-noise, wideband transimpedance-capable amplifier with high slew rate for pulse fidelity. Use Value: 2.2nV/√Hz noise floor and 240MHz full-power bandwidth preserve weak echo SNR and time-of-flight resolution. |
| Professional Camera Signal Chain | High-Speed ADC Input Buffer |
Use Scenario: Analog signal conditioning before digitization in 4K camera sensor interfaces. IC Role / Device Role / Timing Role: DC-coupled gain block with precise offset control and minimal phase distortion. Use Value: 0.04° differential phase and ±3.5V swing enable accurate 12-bit+ ADC sampling without clipping or timing skew. | Use Scenario: Driving SAR or pipeline ADC inputs in test equipment requiring >100Msps sampling. IC Role / Device Role / Timing Role: High-slew, low-distortion buffer isolating source impedance from ADC nonlinearities. Use Value: 1800V/µs slew rate and –75dB crosstalk support clean 10+ ENOB performance at Nyquist frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3091D | Higher 2100V/µs slew rate but 6.5mA supply current; 400MHz bandwidth at AVCL = 2 only | Optimized for AVCL = 1–5; less suitable for fixed-gain ≥8 video line drivers | Select when higher slew is critical and gain flexibility outweighs power efficiency |
| LMH6723MA | 250MHz bandwidth at AVCL = 10; 1600V/µs slew; 4.8mA supply current; no specified differential gain/phase data | Lacks broadcast video characterization; requires external compensation for stability at AVCL ≥8 | Select for general-purpose high-speed buffering where video fidelity specs are not mandated |
Compared with THS3091D and LMH6723MA, MAX4121CPA uniquely combines broadcast-validated differential gain/phase (0.02%/0.04°), 115MHz 0.1dB flatness, and 5mA power consumption - making it the only drop-in solution for cost-sensitive, standards-compliant HD video line drivers.
Availability
MAX4121CPA is available at Aetrix Electronics and suitable for broadcast video infrastructure, ultrasound imaging systems, and professional camera signal chains requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for MAX4121CPA 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-speed ICs for demanding industrial, medical, and communications applications.
The MAX4112/MAX4113/MAX4117–MAX4120 family was engineered specifically for broadcast-grade video signal conditioning - emphasizing differential gain/phase accuracy, gain-flatness bandwidth, and low-noise current-feedback operation.
FAQ
What is the recommended power-supply bypassing scheme for MAX4121CPA?
MAX4121CPA requires tight local bypassing: a 1000pF ceramic capacitor between each supply pin (VCC and VEE) and ground, placed as close to the package as possible. In parallel, add a 0.01µF ceramic capacitor, and locate a 10µF low-ESR tantalum capacitor at the PCB power entry point. The MAX4121CPA's high-frequency performance degrades significantly without this three-tier bypassing structure.
Can MAX4121CPA drive a 75Ω coaxial cable directly?
Yes, MAX4121CPA can directly drive a 75Ω coaxial cable when configured as a gain-of-8 line driver with proper termination. Its ±3.5V output swing into 100Ω provides sufficient headroom for 2VP-P video signals on 75Ω lines, and its 0.02% differential gain error ensures broadcast-compliant color fidelity - as validated in Maxim's Figure 4 application circuit.
What is the maximum safe input voltage range for MAX4121CPA?
The absolute maximum input voltage range for MAX4121CPA is (VCC + 0.3V) to (VEE – 0.3V). With ±5V supplies, this equals +5.3V to –5.3V. Exceeding this range risks permanent damage. Note that the IN– pin must be driven by the output through an external feedback network; direct voltage-source connection to IN– requires current limiting to ±10mA per Note 1.
Does MAX4121CPA support single-supply operation?
No, MAX4121CPA is specified only for dual-supply operation (±4.5V to ±5.5V). Its input common-mode range is ±2.5V and output swing is symmetrical about ground. Single-supply use would violate the datasheet's operating conditions and result in clipping, distortion, or undefined behavior - confirmed by all AC/DC specifications referenced to dual ±5V rails.
How does MAX4121CPA differ from MAX4112 in practical design?
MAX4121CPA is gain-optimized for AVCL ≥8 (300MHz BW, 1800V/µs), while MAX4112 targets AVCL ≥2 (400MHz BW, 1200V/µs). MAX4121CPA offers superior 0.1dB gain flatness (115MHz vs. 100MHz for MAX4112 at AVCL=2) and tighter differential phase (0.04° vs. 0.03°), making it preferred for fixed-gain video line drivers where gain stability matters more than raw bandwidth.
MAX4121CPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 4.5V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 500ns, 1µs
- -3db Bandwidth:
- 330MHz
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -92dB @ 30MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX4121CPA FAQ
1.How can I place an order for MAX4121CPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4121CPA 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 MAX4121CPA reliable?
The price and inventory of MAX4121CPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4121CPA is usually 5 days.
3.What payment methods are accepted for MAX4121CPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4121CPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4121CPA?
MAX4121CPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4121CPA 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 MAX4121CPA?
For technical support, including MAX4121CPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4121CPA requirements.
6.How does Aetrix verify that MAX4121CPA is sourced from the original manufacturer or authorized distributors?
All MAX4121CPA 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 MAX4121CPA meets industry standards.
7.What is the process for return or replacement of MAX4121CPA?
All MAX4121CPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4121CPA, 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 MAX4121CPA part is unused and in its original packaging.
Return procedure for MAX4121CPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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