MAX162ACNG+ - 12-Bit 308kSPS CMOS ADC | Maxim Integrated
Référence : MAX162ACNG+ ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.75 | $18,75 |
| 10 | $16.42 | $164,20 |
| 100 | $14.1 | $1 410,00 |
| 500 | $12.35 | $6 175,00 |
| 1 000 | $10.85 | $10 850,00 |
MAX162ACNG+ Présentation
An SAR ADC is a precision data converter which uses a binary-search successive-approximation register architecture to convert an analog input to a 12-bit digital word in N clock cycles (N = resolution in bits). It sits in the hierarchy: ADC -> data converter -> signal chain IC -> semiconductor. SAR ADCs are valued for deterministic latency, no-pipeline delay, intrinsic monotonicity, and excellent DC accuracy - making them the dominant topology for multiplexed data-acquisition systems, instrumentation, and industrial control loops.
Key features of the MAX162ACNG+ include a maximum 1.75 us conversion time, an internal buried-Zener 2.5V reference (2.5V +/- 20 mV), a high-impedance analog input that does not require external buffering, and a 8/12-bit parallel interface compatible with most microprocessors and DSPs. The +5V single-supply operation eliminates the need for negative rails, simplifying system power architecture.
Typical applications include digital signal processing, precision instrumentation, process control, and audio/speech processing. It is also widely used in pen digitizers, spectrum analyzers, and high-accuracy data-acquisition front ends where 12-bit resolution at > 250 kSPS is required from a single +5V supply.
When designing with this part, provide adequate decoupling (a 10 uF and a 0.1 uF capacitor close to the supply pin) and ensure the analog input band-limited below the ADC's input bandwidth to avoid -3 dB gain errors. The internal reference is sufficient for most 12-bit applications but can be overdriven with an external 2.500V reference for higher-precision systems.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, and provides an AEO-friendly FAQ answering common engineering questions about the MAX162ACNG+.
Alternatives de remplacement direct pour MAX162ACNG+ — 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 MAX162ACNG+ (même facteur de forme et même empreinte) — différant par Mounting Type, Resolution, Conversion Time, Data Interface, Input Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MAX162CCNG+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX162BCNG+
✅ Remplacement direct✓ En stock
$7.5 / unité
Voir la fiche technique →MAX162ACNG-T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX163CCNG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD574AJN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MX7572KN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX162ACNG+ Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Conversion Rate | 308 kSPS |
| Conversion Time | 1.75 us (max) |
| Analog Input Range | 0 V to +5 V (unipolar) |
| Supply Voltage (Analog) | +5 V |
| Supply Voltage (Digital) | +5 V |
| Power Dissipation | 9 mW typical at 308 kSPS |
| Internal Reference | +2.5 V +/- 20 mV buried Zener |
| INL (max) | +/- 1/2 LSB ("A" grade) |
| DNL (max) | +/- 1/2 LSB ("A" grade) |
| Output Interface | 8/12-bit parallel |
| Plage de température de fonctionnement | 0 C to +70 C (commercial) |
| Boîtier | 24-pin PDIP (NG) |
| Type de montage | Through-Hole |
Configuration des broches de MAX162ACNG+
| Broche 1 | OUT1 (LSB) — Data output bit 1 (LSB) |
| Broche 2 | OUT2 — Data output bit 2 |
| Broche 3 | OUT3 — Data output bit 3 |
| Broche 4 | OUT4 — Data output bit 4 |
| Broche 5 | OUT5 — Data output bit 5 |
| Broche 6 | OUT6 — Data output bit 6 |
| Broche 7 | OUT7 — Data output bit 7 |
| Broche 8 | OUT8 — Data output bit 8 |
| Broche 9 | OUT9 — Data output bit 9 |
| Broche 10 | OUT10 — Data output bit 10 |
| Broche 11 | OUT11 — Data output bit 11 |
| Broche 12 | OUT12 (MSB) — Data output bit 12 (MSB) |
| Broche 13 | HBEN — High-byte enable (8/12-bit interface select) |
| Broche 14 | CS — Chip select (active low) |
| Broche 15 | RD — Read input (active low) |
| Broche 16 | BUSY — Conversion-in-progress output (active high) |
| Broche 17 | CLK — External clock input |
| Broche 18 | INT/EXT — Internal/external clock select |
| Broche 19 | R/C — Read/conversion start input |
| Broche 20 | AGND — Analog ground |
| Broche 21 | VDD — +5V analog supply |
| Broche 22 | VSS — -5V analog supply or GND for unipolar |
| Broche 23 | DGND — Digital ground |
| Broche 24 | VREF — +2.5V reference (internal) / external reference input |
Applications typiques
MAX162ACNG+ convient pour 7 applications: Digital Signal Processing (DSP) Front End, Precision Instrumentation and Data Acquisition, Process Control and Industrial Automation, Audio and Speech Processing, Pen Digitizers and Tablets, Spectrum Analyzers and Test Equipment, Medical Monitoring and Diagnostic Equipment.
Digital Signal Processing (DSP) Front End
The MAX162ACNG+ is well suited as the analog front end for DSP-based systems requiring 12-bit precision and > 250 kSPS throughput. The 308 kSPS conversion rate and parallel 8/12-bit interface match the cycle budget of mid-range DSPs (TMS320C25, ADSP-21xx) without requiring a wait state. Its single +5V supply and low 9 mW dissipation simplify portable DSP designs; the internal +2.5V reference removes the need for an external reference IC, reducing BOM count. Place a 10 uF tantalum + 0.1 uF ceramic decoupling pair within 5 mm of pin 21 to keep digital switching noise out of the analog input.
Recommandé
Precision Instrumentation and Data Acquisition
The MAX162ACNG+'s +/- 1/2 LSB INL/DNL linearity makes it a reliable choice for 12-bit instrumentation front ends where DNL errors directly degrade measurement accuracy. The internal track-and-hold settles a 5V full-scale input in under 1 us, sufficient for multiplexed multi-channel data acquisition systems at per-channel rates up to 50 kSPS with oversampling. The 0-5V unipolar input range aligns directly with industrial sensor conditioning outputs; a front-end instrumentation amplifier (e.g., AD620) can drive the high-impedance analog input without an additional buffer stage.
Recommandé
Process Control and Industrial Automation
Industrial process control loops benefit from the MAX162ACNG+'s 0-70 C commercial temperature range, single +5V supply, and 12-bit (1 part in 4096) resolution sufficient for closed-loop valve and actuator positioning. The 308 kSPS throughput supports 8-16 multiplexed channels at industrial-grade 1-10 kHz per-channel update rates. The internal reference eliminates per-board calibration drift common in +5V-only designs; legacy PLC and SCADA cards from the 1990s adopted the MAX162 family as a result. Add a 100 ohm series resistor + 1000 pF cap on AIN for RFI/EMI immunity in noisy factory floors.
Recommandé
Audio and Speech Processing
Although 12-bit resolution is below modern audio standards, the MAX162ACNG+'s 308 kSPS throughput and deterministic SAR latency suit mid-bandwidth speech-processing applications such as digital vocoders, speech recognition front ends, and hearing-aid DSP preprocessing at 8-32 kHz sample rates. The single +5V supply matches portable audio DSP supply rails; the internal +2.5V reference is suitable for microphone preamp outputs post-mic-amp gain. Anti-alias filtering must precede the ADC - a 4th-order Butterworth at 0.4x FS prevents aliasing of speech bands above 4 kHz at 8 kSPS sample rate.
Recommandé
Pen Digitizers and Tablets
The MAX162ACNG+ was a hallmark ADC in 1990s-era pen digitizer tablets, where its 308 kSPS throughput and 12-bit X-Y position resolution met stylus sampling requirements at 100+ points per second. The internal +2.5V reference and 0-5V unipolar input accept the standard resistive digitizer matrix output signal conditioning directly. The 24-pin PDIP package through-hole design was a manufacturing choice for high-volume digitizer PCB assembly lines. Modern replacements use lower-power 12-bit SAR ADCs in QFN packages, but the MAX162 remains in service in legacy equipment.
Recommandé
Spectrum Analyzers and Test Equipment
The MAX162ACNG+'s 308 kSPS rate, 12-bit resolution, and 9 mW dissipation make it a viable IF-stage ADC for low-frequency spectrum analyzers, vibration analyzers, and FFT-based bench instruments up to 100 kHz input bandwidth. The parallel interface delivers samples to an FFT coprocessor or DSP without serial-port bottlenecks. With 1.75 us conversion time, a 1024-point FFT can be computed and displayed in under 10 ms - real-time for the display refresh rate. The internal reference simplifies portable test instruments; bipolar input capability can be added externally by AC-coupling an op-amp into the 0-5V input range.
Recommandé
Medical Monitoring and Diagnostic Equipment
Patient monitoring and diagnostic instruments of the 1990s-2000s adopted the MAX162ACNG+ for ECG/EKG, pulse-oximeter, and temperature data acquisition front ends where 12-bit resolution and 0-70 C operating range were adequate for signal-channel diagnostics. The 308 kSPS throughput supports 8-16 sensor multiplexing at clinical-grade 1 kHz per-channel rates; deterministic conversion timing simplifies synchronization with downstream DSP filters. The +5V single-supply operation simplified IEC 60601-1 isolation design; battery-powered portable monitors benefited from the 9 mW dissipation. Modern replacements require 16-24 bit ADCs but the MAX162 remains in legacy service fleets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX162ACNG+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX162CCNG+ | MAX162BCNG+ | MAX162ACNG-T | MAX163CCNG | AD574AJN | MX7572KN |
|---|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices | Maxim Integrated |
| Package | PDIP-24 (NG) | PDIP-24 (NG) - same | PDIP-24 (NG) - same | PDIP-24 (NG) - same | PDIP-24 - same | PDIP-24 - same | PDIP-24 - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Conversion Rate | 308 kSPS | 308 kSPS | 308 kSPS | 308 kSPS | 308 kSPS | 28 kSPS (35 us) | 10 kSPS (100 us) |
| Input Voltage Range | 0V to +5V unipolar | 0V to +5V unipolar | 0V to +5V unipolar | 0V to +5V unipolar | +/- 15V bipolar | +/- 5V / +/- 10V bipolar | 0V to +5V unipolar |
| Supply Voltage | +5V (+/- 5V for bipolar) | +5V (+/- 5V) | +5V (+/- 5V) | +5V (+/- 5V) | +/- 15V or +5V | +/- 15V and +5V | +5V (+/- 5V) |
| Internal Reference | +2.5V (+/- 20 mV) | +2.5V | +2.5V | +2.5V | External required | +10V internal | +2.5V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Highest linearity in the MAX162 family (vs MAX162BCNG+)
- Faster throughput than AD574AJN (vs AD574AJN)
- Internal +2.5V reference included (vs MAX163CCNG)
Notes de conception
Decouple VDD (pin 21) with a 10 uF tantalum in parallel with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. The MAX162ACNG+ draws 9 mW at full 308 kSPS throughput; ripple on VDD directly couples into the analog input through the internal reference. Use a star-ground topology tying AGND and DGND at a single point near pin 20 to avoid digital switching noise corrupting the analog input return path.
Route the analog input (pin 8, AIN) and the reference pin (pin 24, VREF) traces away from digital output lines (OUT1-OUT12) to minimize digital-to-analog crosstalk. Guard the AIN trace with AGND on both sides for boards with noisy digital buses; if a multilayer PCB is used, place a continuous AGND plane on the layer directly beneath the analog section. Estimated: a properly guarded 4-layer PCB layout typically yields 10-15 dB better SNR than a 2-layer equivalent.
For input bandwidth-limited applications, place a 4th-order anti-aliasing filter (Butterworth or Bessel) directly at the AIN pin. The MAX162ACNG+ analog input has approximately 50 ns acquisition time to 0.02% accuracy; source impedances above 1 kohm require a buffer amplifier (e.g., MAX410 or LF356) within 50 mm of the AIN pin to prevent acquisition-time-induced gain errors. Estimated: 10 kohm source impedance degrades SNR by approximately 2 dB at 308 kSPS.
Do not drive the analog input beyond the supply rails (AVDD + 200 mV). Avoid applying external clock faster than 4 MHz (max) - the internal clock divider expects 1 MHz to 4 MHz input per the datasheet. The R/C pin (pin 19) rising high initiates conversion; ensure a clean monotonic transition with rise time under 100 ns to avoid false starts. Do not leave VSS (pin 22) floating when operating unipolar - tie to AGND or drive with -5V for bipolar input mode.
Informations de conformité
RoHS compliance not explicitly stated in verified web data; part is Obsolete. PDIP package is typically through-hole SnPb or matte-tin finish - verify with specific lot via XRF or manufacturer CoC.
