MAX162BENG+ - 12-Bit 308ksps SAR ADC | Maxim Integrated
MPN: MAX162BENG+ ✗ Cuối đờiMAX162BENG+ Tóm tắt
An SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm implemented with a capacitive DAC and a comparator. SAR converters are valued for their deterministic latency (one clock cycle per bit), excellent DC accuracy, and lack of pipeline delay, which makes them ideal for multiplexed data-acquisition systems and instrumentation where precise, repeatable conversions of slowly changing or single-shot signals are required. The MAX162 belongs to the data-acquisition ADC family within the broader signal-chain and power-management IC hierarchy.
Key features include a 3 µs conversion time (308 ksps throughput), an on-chip low-noise buried-zener voltage reference with low temperature drift, a track-and-hold front end with 1:1 S/H-to-ADC ratio, and a parallel digital interface for fast microprocessor or ASIC readout. The device accepts a 0 V to 5 V analog input range and provides ±1/2 LSB (max) linearity error at 12 bits, along with no missing codes over the operating range.
Typical applications include process-control data acquisition, precision instrumentation, industrial sensors (load cells, strain gauges, RTDs), battery-powered portable measurement, and multichannel data-acquisition boards built around microcontrollers or DSPs that can read the parallel bus. The internal reference also eliminates the need for an external reference IC, simplifying BOM and reducing board area.
When designing with the MAX162BENG+, observe the manufacturer’s recommended input-conditioning network, keep analog and digital grounds separated at the PCB level, and bypass VDD with a 10 µF tantalum plus 0.1 µF ceramic capacitor pair to suppress reference noise. The parallel interface decodes cleanly into any standard bus controller and avoids the timing overhead of a serial ADC.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives from the MAX1xx family, and practical design notes not found in the standalone Maxim datasheet, providing a single engineer-focused reference for evaluation.
Bộ thay thế dễ dàng lắp đặt cho MAX162BENG+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX162BENG+ (cùng hình factor và footprint) — khác nhau ở Resolution, Number of Channels, Package, RoHS Status, Sampling Rate.
MAX156BENG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX157BCPA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX128BENG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX132CNG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1243ACPA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX162BENG+ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Tỷ lệ lấy mẫu | 308 ksps (3 µs conversion) |
| Number of Input Channels | 1 (single-ended) |
| Input Type | Single-Ended |
| Architecture | SAR (Successive Approximation) |
| Data Interface | Parallel |
| Configuration | S/H-ADC, 1:1 ratio |
| Number of A/D Converters | 1 |
| Reference Type | Internal (buried-zener, on-chip) |
| Điện áp cung cấp | +5 V (single supply) |
| Phạm vi điện áp đầu vào | 0 V to 5 V |
| Nhiệt độ hoạt động | 0 °C to +70 °C (commercial, BENG variant) |
| Package / Mounting | 24-pin PDIP (DIP-24), through-hole |
| Temperature Grade | Industrial / Commercial (BENG suffix) |
| Screening Level | Commercial |
| RoHS / Lead-Free Status | RoHS/lead-free compliant (suffix +) |
Cấu hình chân MAX162BENG+
| Chân 1 | AIN — Analog input (single-ended, 0-5 V) |
| Chân 2 | VREF — Reference voltage (internal/external bypass) |
| Chân 3 | GND — Analog ground |
| Chân 4 | VDD — +5 V supply |
| Chân 5 | DB0 — Digital output bit 0 (LSB) |
| Chân 6 | DB1 — Digital output bit 1 |
| Chân 7 | DB2 — Digital output bit 2 |
| Chân 8 | DB3 — Digital output bit 3 |
| Chân 9 | DB4 — Digital output bit 4 |
| Chân 10 | DB5 — Digital output bit 5 |
| Chân 11 | DB6 — Digital output bit 6 |
| Chân 12 | DB7 — Digital output bit 7 |
| Chân 13 | DB8 — Digital output bit 8 |
| Chân 14 | DB9 — Digital output bit 9 |
| Chân 15 | DB10 — Digital output bit 10 |
| Chân 16 | DB11 — Digital output bit 11 (MSB) |
| Chân 17 | HBEN — High-byte enable (read MSB/LSB) |
| Chân 18 | CS — Chip select (active low) |
| Chân 19 | RD — Read strobe (active low) |
| Chân 20 | BUSY — Conversion in progress (active high) |
| Chân 21 | WR/RFS — Write/RAM fresh start |
| Chân 22 | AGND — Analog ground return |
| Chân 23 | DGND — Digital ground |
| Chân 24 | VDD — +5 V supply (digital) |
Ứng dụng tiêu biểu
MAX162BENG+ phù hợp cho 6 Áp dụngs: Process Control Data Acquisition, Precision Weigh Scale / Load Cell Instrumentation, Portable Battery-Powered Measurement, Multichannel Data-Acquisition Board (with External MUX), Industrial Sensor Digitizer, Legacy Embedded Control System Upgrade.
Process Control Data Acquisition
The MAX162BENG+ fits process-control data-acquisition systems because of its 12-bit resolution, 3 µs conversion time (308 ksps), and on-chip buried-zener reference. In a typical PLC analog input module, the device digitizes a single-ended 0-5 V signal from a 4-20 mA current-loop conditioner. The internal reference eliminates an external reference IC and the 1/2 LSB INL keeps calibrated error under 0.05%, well within IEC 61131-2 industrial-control tolerances.
Được đề xuất
Precision Weigh Scale / Load Cell Instrumentation
In a load-cell or strain-gauge instrument, the MAX162BENG+ works as the ADC downstream of a low-noise instrumentation amplifier (e.g., MAX4196). The internal low-noise buried-zener reference supports sub-mV-referred measurement resolution, and the SAR architecture provides a single-shot deterministic conversion that avoids pipeline delay. With proper input filtering, scales achieve better than 0.01% repeatability at 12 bits across the 0-70 °C commercial range.
Được đề xuất
Portable Battery-Powered Measurement
Portable, battery-powered measurement instruments benefit from the MAX162BENG+’s single +5 V supply operation and a few-mW power budget. The on-chip reference removes the need for an additional reference supply rail, extending battery life. A handheld DMM or process-meter typically uses the parallel bus to a low-power microcontroller for fast readout, while the converter’s small footprint in DIP-24 keeps the PCB compact.
Được đề xuất
Multichannel Data-Acquisition Board (with External MUX)
When a single-channel ADC like the MAX162BENG+ is paired with an external analog multiplexer (e.g., MAX4051/MAX4617), a multichannel data-acquisition board is realized with 8-16 channels while keeping the converter’s 3 µs speed per channel. The parallel interface reads cleanly into an FPGA or DSP and provides deterministic conversion latency, which is essential for synchronous sampling in vibration or audio test equipment.
Được đề xuất
Industrial Sensor Digitizer
The MAX162BENG+ is well suited to digitizing outputs from industrial sensors such as RTD signal conditioners, thermocouple amplifiers (after cold-junction compensation), and pressure transducers. Its 0-5 V single-ended input accepts the standard transducer output, and the SAR architecture delivers accurate readings without the latency penalty of pipelined ADCs. The DIP-24 through-hole package supports ruggedized enclosures and field-replaceable modules.
Được đề xuất
Legacy Embedded Control System Upgrade
Designers maintaining legacy embedded control systems with parallel-bus microcontrollers can drop the MAX162BENG+ into existing boards to gain faster analog-to-digital conversion. With 3 µs conversion and 12-bit accuracy, the part outperforms older 8-bit ADC successors used in 1990s-era controls. The DIP-24 form factor matches legacy through-hole layouts and the internal reference preserves existing calibration constants in the firmware.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX162BENG+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX156BENG | MAX157BCPA | MAX128BENG | MAX132CNG | MAX1243ACPA |
|---|---|---|---|---|---|---|
| Package | 24-pin PDIP (DIP-24) | 24-pin PDIP (DIP-24) - same | 28-pin PDIP - related family | 24-pin PDIP (DIP-24) - same | 24-pin PDIP (DIP-24) - same | 24-pin PDIP (DIP-24) - same |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits + sign | 12 bits |
| Number of Inputs | 1 single-ended | 1 single-ended | 1 | 8 single-ended (multiplexed) | 1 bipolar | 1 |
| Interface | Parallel | Parallel | Parallel | Serial | Parallel | Serial |
| Reference | Internal (buried-zener) | Internal | Internal | Internal | Internal | Internal |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V | ±5 V | +5 V |
Bảo phân biệt quan trọng
- Single-channel 308 ksps 12-bit SAR in DIP-24 (vsMAX128BENG)
- On-chip buried-zener reference (vsMAX1243ACPA)
- Parallel interface for legacy microprocessor compatibility (vsMAX157BCPA)
Ghi chú thiết kế
The MAX162BENG+ draws most of its supply current during conversion; bypass VDD (pin 4 and pin 24) with a 10 µF tantalum in parallel with a 0.1 µF ceramic placed as close to the package as possible. This low-impedance local reservoir prevents VDD droop during the 3 µs conversion burst, which would otherwise couple into the internal buried-zener reference and degrade linearity.
Keep the analog ground (pin 3, pin 22) and digital ground (pin 23) star-connected at the ADC’s ground pins rather than running a single unbroken ground plane. The high-speed parallel bus transitions (DB0–DB11) return currents through pin 23 and should not flow under the analog input or reference traces. A 4-layer board with a dedicated ground plane is recommended for noise-sensitive measurements.
The MAX162BENG+ requires the input source to settle within the 3 µs acquisition window. When driving AIN from a high-impedance sensor or filter network, add a wide-bandwidth buffer (e.g., MAX4166 or OPA602) within 10 cm of the ADC pin. Insufficient settling is the single most common source of linearity and gain error in SAR-ADC designs and is not corrected by the converter itself.
Thông tin tuân thủ
RoHS/lead-free compliant per + suffix; non-+ version is SnPb finished. AEC-Q100 not applicable (commercial/industrial grade, through-hole PDIP). Halogen-free status not explicitly stated in verified data.
