MAX1224CTC+ - 12-Bit 1.5Msps SAR ADC | Maxim Integrated | TQFN-12
Référence : MAX1224CTC+ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.12 | $4,12 |
| 10 | $3.71 | $37,10 |
| 100 | $3.12 | $312,00 |
| 500 | $2.65 | $1 325,00 |
| 1 000 | $2.28 | $2 280,00 |
MAX1224CTC+ Présentation
An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code. SAR ADCs use a binary-search successive-approximation algorithm that delivers a complete conversion in a fixed number of clock cycles, making them ideal for multiplexed data acquisition, instrumentation, and control loops. The MAX1224 belongs to the data converter -> ADC -> SAR ADC -> precision 12-bit ADC family within Maxim's mixed-signal IC portfolio.
Key specifications include a 12-bit resolution with no missing codes, 1.5 Msps sampling rate, true-differential analog inputs, SPI-compatible serial output, and low-power operation. Per the Maxim datasheet, the device features an internal 2.5V reference (or accepts an external reference) and a shutdown mode that reduces supply current to a few microamps between conversions. The TQFN-12 (4x4 mm) package is halogen-free and qualified for the commercial temperature range of 0C to +70C.
The MAX1224 architecture uses a charge-redistribution DAC array combined with a precision comparator and SAR control logic. The true-differential input structure rejects common-mode noise and ground bounce, enabling accurate conversion in electrically noisy industrial environments. The integrated track-and-hold eliminates the need for an external front-end amplifier in many single-ended applications.
Typical applications include industrial process control, portable data loggers, battery-powered instrumentation, motor control feedback loops, and optical-sensor signal conditioning. The combination of single-supply operation, true-differential input, and a tiny TQFN package suits space-constrained embedded designs.
When designing with this device, place 0.1uF decoupling capacitors as close as possible to the supply and GND pins. Use a low-impedance ground plane and keep analog and digital traces separated to avoid coupling noise into the reference or analog input.
This page synthesizes distributor pricing, parametric alternatives, and design notes not found in the manufacturer datasheet alone, helping engineers quickly evaluate the MAX1224CTC+ for drop-in placement in precision data-acquisition channels.
Alternatives de remplacement direct pour MAX1224CTC+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MAX1224CTC+ (même facteur de forme et même empreinte) — différant par Package, Operating Temperature Range, Number of Channels, Resolution, Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MAX1225CTC+
✅ Remplacement direct✓ En stock
$3.79 / unité
Voir la fiche technique →MAX1224CTC+T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX1224CTC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX116EAX+
✅ Remplacement direct✓ En stock
$18.25 / unité
Voir la fiche technique →MAX1156AEUP+T
✅ Remplacement direct✓ En stock
$7.8 / unité
Voir la fiche technique →MAX1224CTC+ Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit |
| Fréquence d'échantillonnage | 1.5 Msps |
| Number of Channels | 1 input |
| Input Configuration | True differential |
| Architecture | SAR (Successive Approximation) |
| Tension d'alimentation | 2.7 V to 3.6 V (single supply) |
| Interface | SPI / QSPI / MICROWIRE-compatible serial |
| Reference | Internal 2.5 V or external |
| Température de fonctionnement | 0 C to +70 C (commercial) |
| Boîtier | 12-TQFN (4x4 mm) |
| Type de montage | Surface Mount |
| Niveau MSL | 1 |
| Statut RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes (Matte Tin, e3) |
| Courant d'arrêt | Few uA (per datasheet) |
Configuration des broches de MAX1224CTC+
| Broche 1 | AIN+ — Positive differential analog input |
| Broche 2 | AIN- — Negative differential analog input |
| Broche 3 | GND — Analog/digital ground |
| Broche 4 | REF — Reference voltage (internal 2.5V or external) |
| Broche 5 | VDD — +2.7V to +3.6V analog supply |
| Broche 6 | DOUT — Serial data output |
| Broche 7 | SCLK — Serial clock input |
| Broche 8 | CS — Chip-select input (active low) |
| Broche 9 | DRDY — Data-ready output |
| Broche 10 | SHDN — Shutdown input (active low) |
| Broche 11 | NC — Not connected (per datasheet) |
| Broche 12 | NC — Not connected (per datasheet) |
Applications typiques
MAX1224CTC+ convient pour 6 applications: Industrial Process Control Data Acquisition, Portable Battery-Powered Instrumentation, Optical Sensor Signal Conditioning, Motor Control Feedback Loop, Medical Diagnostic Monitoring Equipment, Communication Infrastructure Power Monitoring.
Industrial Process Control Data Acquisition
The MAX1224CTC+ suits multi-channel industrial data-acquisition front-ends that require fast settling and true-differential inputs. Its 1.5 Msps sampling rate enables oversampling of slow transducer signals (RTDs, thermocouples, strain gauges) to improve effective number-of-bits through digital averaging. The true-differential input pair rejects ground-loop noise common in factory-floor wiring, while the single 3.3V supply simplifies isolated power design. Pair with the MAX11120 12-bit companion DAC for closed-loop actuator control and the MAX11627 12-bit ADC for auxiliary channels.
Recommandé
Portable Battery-Powered Instrumentation
The MAX1224CTC+ draws only a few mA during active conversion and drops to microamp-level shutdown current between samples, making it a strong fit for battery-powered handheld instruments. Its 2.7V-3.6V supply works with a single Li-ion cell or two alkaline cells, and the internal 2.5V reference eliminates the need for a separate reference IC. The TQFN-12 package footprint fits space-constrained PCB layouts typical of portable multimeters and medical monitoring devices. Use with MAX11164ETC+T for companion 12-bit system housekeeping channels.
Recommandé
Optical Sensor Signal Conditioning
Photo-diode and photo-transducer front-ends benefit from the MAX1224CTC+'s true-differential input and 1.5 Msps throughput, allowing simultaneous sampling of differential photocurrents and reference channels. The SAR architecture provides no-latency conversions for closed-loop optical power control in laser drivers and spectrometer systems. The internal 2.5V reference maintains gain accuracy over temperature variations in field-deployed optical instrumentation. Use alongside MAX1156AEUP+T for additional photodiode channels in spectroscopic analyzers.
Recommandé
Motor Control Feedback Loop
BLDC and stepper motor control loops demand sub-microsecond latency between current sensing and PWM update; the MAX1224CTC+'s SAR architecture delivers complete 12-bit conversions in approximately 670 ns, enabling current-loop sampling rates well above 1 Msps. Its true-differential inputs accept shunt-resistor signals directly without external instrumentation amplifiers. Pair with MAX11321ATJ+T for analog housekeeping channels such as DC-bus voltage and temperature monitoring.
Recommandé
Medical Diagnostic Monitoring Equipment
Patient-monitoring front-ends (ECG, SpO2, temperature) require low-noise 12-bit conversions of low-frequency bioelectric signals; the MAX1224CTC+ provides more bandwidth than needed for oversampling and digital filtering to push effective resolution beyond 14 bits. The single 3.3V supply and exposed-pad TQFN package support compact, thermally efficient medical-device layouts. Pair with MAX1145BEAP+ for multi-channel bioelectric signal acquisition.
Recommandé
Communication Infrastructure Power Monitoring
Telecom base-station and network-switch power-supply monitoring modules use the MAX1224CTC+ to digitize current and voltage rails at high speed, feeding telemetry data to supervisory controllers. The 1.5 Msps throughput supports simultaneous sampling of multiple rails via an external MUX without bottlenecking the control loop. The SPI interface is compatible with MAX32 microcontrollers and standard base-station management ICs. Pair with MAX11058ECB+T for parallel multi-rail monitoring.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX1224CTC+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX1225CTC+ | MAX1224CTC+T | MAX1224CTC |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 12-TQFN (4x4 mm) | 12-TQFN (4x4 mm) | 12-TQFN (4x4 mm) | 12-TQFN (4x4 mm) |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps |
| Architecture | SAR | SAR | SAR | SAR |
| Input Type | True differential | True differential | True differential | True differential |
| Supply Voltage | 2.7V to 3.6V | 2.7V to 3.6V | 2.7V to 3.6V | 2.7V to 3.6V |
| Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE |
| RoHS Compliant | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- Single true-differential input channel with 1.5 Msps SAR throughput (vs MAX1225CTC+)
- Tape-and-reel variant available without electrical difference (vs MAX1224CTC+T)
- Compact 4x4 mm TQFN-12 with exposed thermal pad (vs MAX116EAX+)
Notes de conception
Place a 0.1uF decoupling capacitor within 2 mm of the VDD pin and connect the exposed pad to a low-impedance ground plane. According to the Maxim datasheet land-pattern recommendation, the TQFN-12 thermal pad must be soldered to a ground pad at least as large as the device footprint to maintain mechanical reliability and thermal dissipation. Route analog and digital traces on separate layers when possible, and avoid routing digital clocks (SCLK, CS) parallel to analog input traces to minimize coupling.
Drive the analog input source through a low-impedance buffer (such as an op-amp with < 50 ohm output impedance) to ensure the track-and-hold settles within the acquisition window. Per the Maxim datasheet, source impedances above approximately 1 kohm cause gain errors due to incomplete settling of the input sampling capacitor. Place a 100 pF to 1 nF bypass capacitor across the analog inputs to filter RF pickup without slowing the input signal.
Do not connect digital ground and analog ground through separate traces back to a single point - use a continuous ground plane instead. The MAX1224CTC+ relies on a low-impedance ground return for both the internal reference and analog input signals. Per the Maxim datasheet, separate ground planes connected at a single point are acceptable for split-supply designs but generally not required for single-supply 3.3V operation. Also, the shutdown pin (SHDN) must be tied high through a 100 kohm resistor if not actively driven, to ensure normal operation at power-up.
Informations de conformité
RoHS compliant per Maxim product page. Lead finish is Sn (matte tin) per JESD-609 code e3. Not AEC-Q100 qualified - choose automotive-grade Maxim parts for vehicle applications.
