MAX120CAG+ - 12-Bit 500ksps SAR ADC | Maxim Integrated
Teilenummer: MAX120CAG+ ✓ AktivMAX120CAG+ Übersicht
An ADC is an analog-to-digital converter, a data-conversion IC that transforms a continuously varying voltage into a numeric code for processing by a microcontroller, DSP, FPGA, or other digital controller. The MAX120 belongs to the broader data-converter IC hierarchy, where it provides the bridge between a sensor or conditioning circuit and digital computation. Its parallel output architecture is intended for systems that can directly read a 12-bit conversion result.
The MAX120CAG+ supports sampling rates as high as 500 ksps, while its 350 ns track-and-hold acquisition time allows the input to settle before conversion. Its 1.6 µs conversion time and integrated low-drift reference reduce the external circuitry required for a complete measurement channel. The BiCMOS construction combines bipolar and CMOS circuit technologies, supporting a device that combines reference, sampling, and conversion functions.
The converter provides 12-bit resolution and one analog input. The MAX120 family datasheet identifies the MAX120 and MAX122 as complete BiCMOS sampling ADCs with track-and-hold and reference functions. This integration makes the MAX120CAG+ useful where a deterministic parallel interface and rapid sampling are more important than the very low power consumption associated with compact serial-interface converters.
Typical uses include industrial process monitoring, instrumentation, digital voltmeters, data acquisition, control loops, and signal measurement systems. Its 500 ksps throughput supports sampling of rapidly changing analog waveforms, while the integrated reference can simplify system architecture. The parallel interface can also reduce the number of serial transactions required when the destination processor provides suitable input latches or an external bus interface.
When laying out a board, place the analog input and reference connections away from switching nodes and high-current traces. Provide a stable analog ground path, follow the datasheet bypass recommendations, and account for input bandwidth and source settling time. The acquisition period is only 350 ns, so an input driver with excessive output impedance can degrade accuracy during successive conversions.
This page combines the manufacturer family specifications with package details, practical application guidance, comparison information, and qualified drop-in alternatives. These engineering-oriented details help designers evaluate acquisition timing, interface requirements, board layout, and replacement decisions without relying only on a basic catalog description.
Drop-in-Alternativen für MAX120CAG+ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MAX120CAG+ (gleiche Bauform und Footprint) – abweichend in Package, Resolution.
MAX120EAG+
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →MAX120EAG/883
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX120EAG/EEE
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX120CAG/883
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX120CAG/EEE
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MAX120CAG+ Grenzwerte & elektrische Eigenschaften
| ADC Type | Single-input successive-approximation ADC |
| Auflösung | 12 bits |
| Maximum Sampling Rate | 500 ksps |
| Number of Analog Inputs | 1 input |
| Track-and-Hold Acquisition Time | 350 ns |
| Conversion Time | 1.6 µs |
| Throughput Rate | 500 ksps |
| Integrated Reference | Low-drift on-chip voltage reference |
| Integrated Track-and-Hold | Yes |
| Process Technology | BiCMOS |
| Output Interface | 12-bit parallel |
| Gehäuse | 24-pin SSOP, 5.30 mm width |
| Montageart | Surface mount |
MAX120CAG+ 24-pin ssop, 5.30 mm width Pinbelegungsleitfaden
Pinbelegung für MAX120CAG+ (24-pin ssop, 5.30 mm width-Gehäuse). Dieses analoge Bauteil verfügt über Eingangs-, Ausgangs- und Versorgungspins. Offset-Null-, Kompensations- und Enable-Pin-Konfigurationen entnehmen Sie dem Herstellerdatenblatt. Ideal für Signalaufbereitung und Verstärkerschaltungen.
Keine detaillierten Pinbelegungsdaten verfügbar für MAX120CAG+.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MAX120CAG+ ist geeignet für 6 Anwendungs: Industrial Process Monitoring, Digital Voltmeter and Instrumentation, Rapid Waveform Data Acquisition, Automated Control Systems, Digital Power and Load Monitoring, Audio and Communication Signal Sampling.
Industrial Process Monitoring
The MAX120CAG+ fits industrial process monitoring because it combines 12-bit resolution with a 500 ksps sampling rate and a 350 ns track-and-hold acquisition time. It can digitize a conditioned pressure, temperature, or position signal while the integrated low-drift reference reduces the number of analog components in the measurement channel. Its 1.6 µs conversion time supports rapid updates, although the parallel output requires enough input pins on the controller or an interface adapter. A robust implementation should isolate the field input, protect the analog pin against transients, and keep switching converters away from the measurement front end.
Empfohlen
Digital Voltmeter and Instrumentation
The MAX120CAG+ is appropriate for digital voltmeter and laboratory-instrumentation front ends that require deterministic acquisition and parallel results. A 12-bit converter can represent 4096 codes, while the 500 ksps maximum rate permits the measurement engine to average samples and improve effective noise performance when the source impedance permits. The integrated reference and track-and-hold circuit simplify the analog section. Designers should still include input protection, calibration, and a stable ground arrangement, particularly when the measured signal comes from long cables or a floating source.
Empfohlen
Rapid Waveform Data Acquisition
The MAX120CAG+ can serve as the front end of a rapid waveform data-acquisition system because it combines a 350 ns acquisition interval, a 1.6 µs conversion time, and a maximum throughput of 500 ksps. The 12-bit parallel bus permits a digital engine to capture each code without serial-interface overhead. This approach is useful for supervisory control, vibration monitoring, and repetitive signal sampling where a low-latency result matters. The analog driver must settle the input within the acquisition window, and the digital interface should account for setup and propagation delays when timing the parallel output.
Empfohlen
Automated Control Systems
The MAX120CAG+ supports automated control loops that repeatedly measure an analog condition and update a digital controller. Its 500 ksps throughput provides frequent feedback samples, while the 12-bit resolution supports incremental control decisions over a suitable operating range. The integrated track-and-hold and reference allow the converter to occupy a compact section of an analog control board. A practical design should preserve adequate loop bandwidth, isolate the input from high-energy switching paths, and avoid placing fast digital edges beneath the analog signal and reference connections.
Empfohlen
Digital Power and Load Monitoring
The MAX120CAG+ can monitor voltage, current, and temperature signals in a digital power system where rapid sampling improves control-loop or protection response. Its 500 ksps rate allows the controller to observe changes much faster than a slow instrumentation ADC, and the 12-bit output provides a practical balance between resolution and parallel wiring. Input conditioning remains essential: divider impedance must satisfy the 350 ns acquisition requirement, and the analog and digital return currents should be planned to prevent measurement error during switching transitions.
Empfohlen
Audio and Communication Signal Sampling
The MAX120CAG+ is suitable for communication-signal monitoring when a compact parallel ADC is preferred over a serial-interface converter. Its 12-bit resolution and 500 ksps throughput can capture amplitude or envelope information from a conditioned IF or baseband signal. The 350 ns acquisition time makes source settling a central design requirement, so the preceding amplifier should provide low output impedance and suitable drive capacitance. Keep the analog trace short, maintain a continuous reference ground, and separate switching-node copper to reduce conversion disturbance in the measured waveform.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX120CAG+ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX120EAG+ | MAX120EAG/883 | MAX120EAG/EEE | MAX120CAG/883 | MAX120CAG/EEE |
|---|---|---|---|---|---|---|
| Package | 24-pin SSOP | 24-pin SSOP - same | 24-pin SSOP - same | 24-pin SSOP - same | 24-pin SSOP - same | 24-pin SSOP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps |
| Number of Analog Inputs | 1 input | 1 input | 1 input | 1 input | 1 input | 1 input |
| Acquisition Time | 350 ns | 350 ns | 350 ns | 350 ns | 350 ns | 350 ns |
| Conversion Time | 1.6 µs | 1.6 µs | 1.6 µs | 1.6 µs | 1.6 µs | 1.6 µs |
| Output Interface | 12-bit parallel | 12-bit parallel | 12-bit parallel | 12-bit parallel | 12-bit parallel | 12-bit parallel |
| Integrated Reference | Low-drift on-chip reference | Low-drift on-chip reference | Low-drift on-chip reference | Low-drift on-chip reference | Low-drift on-chip reference | Low-drift on-chip reference |
| Process Technology | BiCMOS | BiCMOS | BiCMOS | BiCMOS | BiCMOS | BiCMOS |
Wichtigste Unterscheidungsmerkmale
- Matches the MAX120EAG+ core conversion performance while retaining the same PCB footprint (vs. MAX120EAG+)
- Combines sampling and reference functions in one converter (vs. AD9066AR)
- Provides a simpler parallel acquisition interface than conventional serial-output converters (vs. MCP3424-E/SL)
Designhinweise
Design the analog input network to settle within the MAX120CAG+'s 350 ns acquisition interval. Account for the output impedance and capacitance of the preceding amplifier, the ADC input capacitance, and the source impedance of a sensor divider. A practical design should calculate worst-case settling at the selected 500 ksps rate and verify accuracy with the fastest input transitions rather than relying only on a nominal sample-clock period.
Route the analog input directly to the converter and keep it away from switching-node copper, high-current inductors, and fast digital clock traces. Use a continuous ground plane, place bypass capacitors close to the supply and ground pins, and avoid splitting the ground path beneath the converter. The integrated reference and track-and-hold circuits reduce external parts, but their performance still depends on clean supply return paths and controlled board-level noise.
Do not treat the 12-bit parallel outputs as independent outputs that can be sampled at an arbitrary instant. Read them as one coherent conversion result using the acquisition and conversion timing in the manufacturer datasheet. Also verify the output logic levels, data setup requirements, and bus timing of the destination FPGA, DSP, or microcontroller. A timing error at the digital interface can invalidate an otherwise accurate analog conversion.
Provide a stable, low-noise supply to the converter and follow the manufacturer bypass recommendations. Since the reference is integrated, supply noise and ground movement can still modulate the measured result. Test the system with the analog front end, digital controller, and switching elements operating together, because a converter that performs well on an isolated bench may show different results in a complete mixed-signal assembly.
Compliance-Informationen
No explicit compliance declarations are stated in the manufacturer family material provided for this page. The MAX120CAG+ is an analog-to-digital converter and is not identified as an AEC-Q100-qualified automotive part.
