MAX162BENG - 12-Bit 3µs SAR ADC, 24-PDIP | Maxim Integrated
MPN: MAX162BENG ✓ פעילMAX162BENG סקירה
What is an ADC? An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples a continuous analog input voltage and converts it into a discrete digital code. The MAX162 belongs to the successive-approximation register (SAR) ADC family, which uses a binary-search algorithm against an internal reference to produce one conversion in N clock cycles. SAR ADCs are prized for low latency (no pipeline delay), deterministic behavior, and excellent DC accuracy - making them ideal for multiplexed data-acquisition systems, industrial process control, and precision instrumentation.
Key differentiating features include a 308 ksps sampling rate (3 µs per conversion), on-chip buried-zener reference with ±5 ppm/°C typical drift, ±15 V input range with protection to ±25 V, ±5 V or +5 V single-supply operation, and a track/hold amplifier on the analog input. The internal reference and reference buffer keep external component count low; only decoupling capacitors are required. The 24-pin PDIP package is also intended for retrofit designs, breadboards, and legacy 24-pin ADC sockets where surface-mount conversion is impractical.
Architecturally, the MAX162 uses a capacitively-weighted SAR core clocked from an internal oscillator. Each conversion runs the SAR logic against a switched-capacitor DAC tied to the buried-zener reference, then latches the result into the output latch for parallel read. Because the reference is on-chip, accuracy depends on REF decoupling and PCB layout cleanliness, not on an external reference IC.
Typical applications include multichannel data-acquisition front ends using analog multiplexers, digital panel meters, portable instrumentation with battery-stack monitoring up to ±15 V, process-control analog input modules on PLCs, and precision transducer readouts. The wide bipolar input range also makes it convenient for direct connection to industrial ±10 V signals after a simple resistive divider.
When designing with the MAX162BENG, place the supply-decoupling capacitors within 50 mm of the VDD and VSS pins and keep the analog input traces short and guarded. Avoid running digital outputs parallel to the analog input trace; the parallel interface can couple noise into the comparator during the conversion window if layout is poor.
This page consolidates distributor pricing, drop-in equivalents, and design guidance beyond what the Maxim datasheet provides, including a comparison with the MX7572 family and the MAX197 8-channel 12-bit ADC.
חלופות תחליף ישיר עבור MAX162BENG — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MAX162BENG (אותו גורם צורה וטביעת רגל) — שונים ב Package, Data Interface, Mounting Type, Conversion Time, Operating Temperature.
MX7572JN05+
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MX7572KN12+
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MAX162BCNG+
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←MAX128BENG
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MAX162BENG דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 12 bits |
| Number of Inputs | 1 |
| Input Type | Single-Ended |
| Architecture | SAR (Successive Approximation) |
| קצב דגימה | 308 ksps (3 µs per conversion) |
| Conversion Time | 3 µs (MAX162); 5 µs / 12 µs (MX7572 family) |
| Data Interface | Parallel |
| טווח מתח כניסה | 0 to +5 V (single-supply) / ±15 V (dual-supply) |
| On-Chip Reference | Buried Zener, low drift, low noise |
| מתח אספקה | +5 V (digital); ±5 V analog (dual-supply option) |
| Sample-and-Hold | On-chip wideband track/hold |
| Integral Nonlinearity (INL) | 0.024% (1 LSB max) typical |
| טמפרטורת פעולה | 0 °C to +70 °C (B grade, commercial) |
| מארז | 24-PDIP (Plastic DIP, Through-Hole) |
| מספר פינים | 24 |
| סוג הרכבה | Through-Hole |
| Lead Finish / RoHS | Lead-free / RoHS compliant ('+' suffix) |
| Compatible Family | MX7572 (slower, pin-compatible alternate) |
תצורת פינים של MAX162BENG
| פין 1 | VSS — Negative analog supply (-5 V or GND) |
| פין 2 | VEE — Negative analog supply (or -15 V for bipolar) |
| פין 3 | AGND — Analog ground |
| פין 4 | AIN — Analog input (single-ended) |
| פין 5 | REF — Internal reference bypass |
| פין 6 | REFADJ — Reference adjust / trim |
| פין 7 | DGND — Digital ground |
| פין 8 | CS — Chip select (active low) |
| פין 9 | RD — Read strobe (active low) |
| פין 10 | BUSY — Conversion in progress (active high) |
| פין 11 | CLK — External clock (or internal if tied) |
| פין 12 | WR — Write/convert start |
| פין 13 | DB11 — Data bit 11 (MSB) |
| פין 14 | DB10 — Data bit 10 |
| פין 15 | DB9 — Data bit 9 |
| פין 16 | DB8 — Data bit 8 |
| פין 17 | DB7 — Data bit 7 |
| פין 18 | DB6 — Data bit 6 |
| פין 19 | DB5 — Data bit 5 |
| פין 20 | DB4 — Data bit 4 |
| פין 21 | DB3 — Data bit 3 |
| פין 22 | DB2 — Data bit 2 |
| פין 23 | DB1 — Data bit 1 (LSB) |
| פין 24 | VDD — +5 V digital supply |
יישומים טיפוסיים
MAX162BENG מתאים עבור 6 יישוםs: Industrial Data-Acquisition Front End, Digital Panel Meter and Instrumentation, Precision Transducer Readout, Battery-Stack Monitoring (Up to ±15 V), Process Control Analog Input Module, Portable Test and Measurement.
Industrial Data-Acquisition Front End
The MAX162BENG suits multichannel data-acquisition systems that read bipolar ±10 V or ±15 V industrial signals through a resistive divider. Its 3 µs conversion time provides 308 ksps throughput, while the on-chip 12-bit resolution and buried-zener reference deliver ±1 LSB linearity for accurate PLC analog-input modules. Place the part after an external 8 or 16-channel analog multiplexer (e.g. MAX336) and a simple unity-gain buffer for high-impedance sources. The single +5 V digital supply simplifies interface to 5 V CMOS logic, and the parallel 12-bit output latches cleanly into an FPGA or microcontroller data bus.
מומלץ
Digital Panel Meter and Instrumentation
The MAX162BENG is well suited for 3.5-digit or 4.5-digit digital panel meters, precision multimeters, and benchtop instrumentation where 12-bit accuracy and 3 µs settling time are enough. Combined with an ICL7107/ICL7109-style display driver or an MCU-driven LCD, the MAX162 provides a stable, repeatable conversion with the on-chip reference reducing long-term drift to ~5 ppm/°C typical. Designers use the INT/OUT pin to trigger display latches, and the CS/RD pins for handshake with the host MCU. Battery-powered portable instruments benefit from the part's modest supply current in standby.
מומלץ
Precision Transducer Readout
Bridge and strain-gauge transducers output low-level differential signals that must be digitized with high DC accuracy. The MAX162BENG's internal reference and ±1 LSB typical INL make it a good fit for direct connection to conditioned strain-gauge or load-cell outputs. The 3 µs conversion window is more than fast enough for 1 kHz mechanical bandwidth sensors, and the parallel interface simplifies timing inside dedicated readout boards. Combined with an instrumentation amp such as the MAX4193 front-end, designers build 12-bit force or pressure readouts without an external reference.
מומלץ
Battery-Stack Monitoring (Up to ±15 V)
The MAX162BENG's ±25 V tolerant analog inputs let it directly digitize the per-cell voltage of series-connected battery stacks without a divider network for ±15 V systems. For 48 V lithium packs, an external 100 kΩ/10 kΩ divider scales the signal into the ±5 V analog input range, leveraging the MAX162's full-scale resolution. The 3 µs conversion enables cell sampling at sub-millisecond rates per channel, supporting active cell-balancing feedback loops. Designers use the RD/CS handshake to script scan sequence in the host MCU.
מומלץ
Process Control Analog Input Module
Programmable-logic-controller (PLC) analog input modules digitize 4-20 mA or 0-10 V signals from sensors and transmitters. The MAX162BENG accepts these ranges directly via simple resistor scaling, delivering 12-bit results into the PLC backplane or local MCU. The internal reference keeps calibration stable over industrial temperature ranges, and the DIP-24 form factor works in legacy PLC-3 and PLC-5 form-factor PCBs that were designed around the 24-pin ADC footprint. This makes it attractive for retrofit and maintenance of installed PLC equipment.
מומלץ
Portable Test and Measurement
Portable oscilloscope-style instruments and handheld meters require low-power, single-supply 12-bit ADCs. The MAX162BENG runs from a single +5 V rail with milliwatt-level dissipation, operates from a lithium-battery boost converter, and exposes a 12-bit parallel output that small MCUs can read directly. Combined with a MAX150AEWP+T power supervisor and a MAX1284BCSA SPI-controlled 12-bit ADC as a backup channel, designers build compact, ruggedized test gear. The 24-PDIP footprint is also socketed for field replacement by maintenance technicians.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MAX162BENG — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MX7572JN05+ | MX7572KN12+ | MAX162BCNG+ | MAX128BENG | AD574AJN |
|---|---|---|---|---|---|---|
| Package | 24-PDIP (Through-Hole) | 24-PDIP - same | 24-PDIP - same | 24-PDIP (industrial temp grade) - same | 24-PDIP - same | 28-PDIP - different (cross-package) |
| Brand | Maxim Integrated | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Analog Devices - cross-brand |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Inputs | 1 (single-ended) | 1 | 1 | 1 | 8 (with MUX) | 1 |
| On-Chip Reference | Yes (buried-zener) | Yes | Yes | Yes | Yes (internal 4.096V) | External reference required |
| Operating Temperature | 0 to +70 °C (B grade) | 0 to +70 °C | 0 to +70 °C | -40 to +85 °C (industrial) | -40 to +85 °C | 0 to +70 °C |
מבדילים עיקריים
- Faster conversion than MX7572 family (לעומתMX7572JN05+)
- True drop-in pin compatibility with MX7572 family (לעומתAD574AJN)
- Integrated buried-zener reference vs external reference required on AD574A (לעומתAD574AJN)
- Multi-channel capability of MAX128 family (לעומתMAX128BENG)
הערות תכנון
Decouple VDD (+5 V digital) and VEE (-5 V or -15 V for bipolar operation) with a 0.1 µF ceramic capacitor in parallel with a 10 µF tantalum, placed within 5 mm of each supply pin. Reference bypass (REF pin) requires 10 µF tantalum parallel with 0.1 µF ceramic. Sharing a single ground plane can couple digital switching noise into the analog comparator; split AGND and DGND under the IC and join them only at the package thermal pad or AGND pin. Estimated: total quiescent dissipation is ~150 mW for ±5 V supplies (5 mA × 15 V effective), so no heatsink is required even at industrial temperatures.
Keep the AIN trace short (≤25 mm) and guarded on both sides by AGND copper. Avoid running parallel data bus lines (DB0-DB11) under or adjacent to AIN - the parallel outputs switch during RD and can couple noise into the comparator for 200-300 ns after RD. Place a 100 Ω series resistor in AIN for additional overvoltage protection beyond the ±25 V internal clamp. For sockets, use a quality machined-pin DIP-24 socket (e.g. Aries 24-DIP) to preserve signal integrity at 3 µs conversion rates.
The MAX162BENG samples the input at the falling edge of WR; ensure the analog input is settled to within ±0.5 LSB of its final value before WR rises to start a conversion. Add a 4th-order RC anti-alias filter at AIN with -3 dB cutoff at 0.45 × sampling rate (e.g. 138 kHz for 308 ksps throughput). The internal track/hold has 50 ns aperture delay; the host MCU must gate any input MUX switching to avoid sample crosstalk. Estimated: front-end bandwidth should be ≤45 kHz for 12-bit accuracy at full speed.
Do NOT drive AIN below -25 V or above +25 V - the input protection diodes clamp transients, but sustained overvoltage destroys the part. The INT/OUT pin is open-drain and requires a pull-up resistor (10 kΩ to VDD). The RD signal must NOT be asserted while BUSY is high - reading during conversion returns invalid data and may corrupt the SAR internal state. Always wait for the falling edge of BUSY before latching DB0-DB11.
מידע על תאימות
MAX162BENG+ suffix denotes RoHS-compliant lead-free version per Maxim product page. Standard MAX162BENG (without '+') is legacy lead-finish version. AEC-Q100 not applicable (commercial-grade part - choose MAX162BCNG+ for industrial extended temperature).
