MAX1068CCEG+ - 14-Bit 200ksps 4Ch SAR ADC | Maxim Integrated
MPN: MAX1068CCEG+ ✗ Akhir HidupMAX1068CCEG+ Ringkasan
A successive-approximation register (SAR) ADC is a precision converter architecture that uses a binary-search algorithm combined with an internal sample-and-hold and a precision comparator. SAR ADCs deliver deterministic latency, no pipeline delay, and excellent DC accuracy, making them the preferred choice for multiplexed multi-channel data acquisition, industrial process control loops, and precision instrumentation where small signal levels and low noise are required. The MAX1067/MAX1068 family sits at the entry-tier of high-performance SAR ADCs, occupying the niche between microcontrollers' internal ADCs and dedicated high-speed pipeline converters.
Key features of the MAX1068CCEG+ include true 14-bit resolution with no missing codes, 200 ksps aggregate throughput, integrated +4.096 V reference, software-configurable unipolar/bipolar input ranges, automatic channel scanning, and an automatic power-down mode that reduces supply current to microampere levels between conversions. The internal oscillator eliminates the need for an external clock, and the dedicated reference buffer preserves the +4.096 V reference accuracy even when driving the converter core at full speed.
Typical applications include multichannel analog input modules in PLCs and DCS systems, portable industrial data loggers, isolated front ends for sensor arrays (thermocouples, RTDs, strain gauges, pressure transducers), patient monitoring instrumentation, weigh scales, and general-purpose 4-channel data-acquisition boards. The wide operating temperature range and small QSOP-24 footprint suit densely populated backplanes and battery-powered portable instruments.
When designing with the MAX1068CCEG+, place the +5 V supply decoupling network (10 uF bulk plus 0.1 uF ceramic) within 5 mm of the AVDD pin and keep the analog/digital ground returns separated under a star-ground topology. The internal reference is sufficient for 14-bit performance, but applications that require 1 LSB absolute accuracy across the full -40 C to +85 C range should consider an external reference.
Alternatif penggantian untuk MAX1068CCEG+ — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian MAX1068CCEG+ (sama faktor bentuk dan footprint) — berbeda di dalam Input Type, Package, Resolution, Architecture, Number of Input Channels.
MAX1068BCEG+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX1067BCEE+
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MAX1030BCEG+TG002
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MAX1011CEG+
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MAX1168ACEG+
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MAX1068CCEG+ Rating Maksimal & Karakteristik Listrik
| Manufacturer | Analog Devices / Maxim Integrated |
| Resolusi | 14 bits |
| Sample Rate | 200 kSamples/sec |
| Number of Input Channels | 4 single-ended |
| Architecture | Successive Approximation (SAR) |
| Input Type | Single-Ended |
| Paket | 24-pin QSOP (QSOP-24, MO-137AE) |
| Rentang Suhu Kerja | 0 C to +70 C |
| Screening Level | Commercial |
| Internal Reference Voltage | +4.096 V |
| Internal Oscillator | Yes (integrated, no external clock required) |
| Antarmuka | SPI / QSPI / MICROWIRE-compatible serial |
| Automatic Power-Down | Yes (between conversions) |
| Tipe Mounting | Surface Mount (Gull-Wing) |
| Packing Method | Tube |
| Jumlah Pin | 24 |
Konfigurasi Pin MAX1068CCEG+
| Pin produk 1 | AIN0 — Analog input channel 0 |
| Pin produk 2 | AIN1 — Analog input channel 1 |
| Pin produk 3 | AIN2 — Analog input channel 2 |
| Pin produk 4 | AIN3 — Analog input channel 3 |
| Pin produk 5 | AGND — Analog ground |
| Pin produk 6 | REF — Reference voltage input/output (4.096 V internal) |
| Pin produk 7 | AVDD — Analog supply voltage (+5 V) |
| Pin produk 8 | DVDD — Digital supply voltage (1.8 V to 5 V) |
| Pin produk 9 | DGND — Digital ground |
| Pin produk 10 | SCLK — Serial clock input |
| Pin produk 11 | DOUT — Serial data output |
| Pin produk 12 | DIN — Serial data input |
| Pin produk 13 | CS — Chip select (active low) |
| Pin produk 14 | SSTRB — Serial strobe output |
| Pin produk 15 | RST — Reset (active low) |
| Pin produk 16 | PD — Power-down input |
| Pin produk 17 | A0 — Address select / mode pin |
| Pin produk 18 | A1 — Address select / mode pin |
| Pin produk 19 | NC — Not connected (per datasheet) |
| Pin produk 20 | NC — Not connected (per datasheet) |
| Pin produk 21 | NC — Not connected (per datasheet) |
| Pin produk 22 | NC — Not connected (per datasheet) |
| Pin produk 23 | NC — Not connected (per datasheet) |
| Pin produk 24 | NC — Not connected (per datasheet) |
Aplikasi Umum
MAX1068CCEG+ cocok untuk 6 aplikasis: Multichannel PLC / DCS Analog Input Module, Portable Data Logger and Handheld Test Instruments, Medical Patient Monitoring Front End, Precision Weigh Scale and Load Cell Digitizer, Industrial Sensor Array and Transducer Interface, Embedded Data Acquisition Daughter Board.
Multichannel PLC / DCS Analog Input Module
The MAX1068CCEG+ fits multi-channel PLC and DCS analog input modules because it provides four single-ended inputs in one 24-pin QSOP, with 14-bit resolution and 200 ksps aggregate throughput that exceeds the bandwidth of 4-20 mA process loops. The integrated +4.096 V reference and internal oscillator eliminate the external components that typically consume board area in PLC backplanes. In use, each transducer is routed through a protection network and low-pass filter to one of the four inputs, while the SPI interface streams converted values to a backplane microcontroller. Compared with a discrete 4-channel ADC solution, the integrated reference buffer and automatic power-down mode reduce BOM cost and quiescent current in the field, simplifying both IEC 61010-compliant input module design and ATEX-classified installation.
Direkomendasikan
Portable Data Logger and Handheld Test Instruments
The MAX1068CCEG+ is well suited to portable data loggers and handheld test instruments thanks to its automatic power-down mode, which drops supply current to microampere levels between conversions, and its tiny QSOP-24 footprint that fits inside a battery-powered enclosure. The 200 ksps sample rate is sufficient to capture transient events from thermocouples, RTDs, and 4-20 mA sensors during field calibration. Used in conjunction with a low-power microcontroller and a coin-cell or Li-ion battery, four channels of data can be logged for months before recharge, with the SAR architecture guaranteeing deterministic conversions that simplify time-stamping in firmware.
Direkomendasikan
Medical Patient Monitoring Front End
The MAX1068CCEG+ serves as a compact front-end ADC in patient monitoring equipment where deterministic conversion latency matters more than ultra-high resolution. The 14-bit resolution, 200 ksps throughput, and integrated reference deliver adequate dynamic range for ECG, SpO2, and respiration channels, while the SPI interface is compatible with low-power medical microcontrollers. Each analog input is conditioned by an isolation amplifier and low-pass filter, then multiplexed into the SAR core, eliminating the need for a separate ADC per channel. Compared with a delta-sigma ADC, the SAR architecture provides single-cycle conversions critical for synchronized multi-channel biosignal acquisition.
Direkomendasikan
Precision Weigh Scale and Load Cell Digitizer
The MAX1068CCEG+ fits precision weigh-scale and load-cell digitizer designs where 14-bit absolute accuracy and 4 single-ended channels are needed to read multiple load cells on a platform. The integrated +4.096 V reference and reference buffer preserve gain accuracy over temperature, while the SAR architecture provides the no-latency conversion required for stable displayed weight and tare updates. In a typical platform-scale design, each load-cell bridge feeds an instrumentation amplifier (e.g. MAX4239) whose output drives one of the four ADC inputs, and the converter's deterministic latency simplifies calibration routines in firmware.
Direkomendasikan
Industrial Sensor Array and Transducer Interface
The MAX1068CCEG+ handles industrial sensor arrays requiring multichannel analog digitisation, including strain gauges, pressure transducers, flow meters, and resistance temperature detectors. Its 4 single-ended inputs map cleanly to a 4-wire PT100 RTD or 4-bridge strain gauge cluster, while the integrated reference and internal oscillator simplify assembly. The SAR architecture delivers 14-bit conversions in under 5 us, well below the response time of most industrial transducers, and the SPI interface streams results to a real-time MCU running control loops or Modbus-class fieldbus stacks.
Direkomendasikan
Embedded Data Acquisition Daughter Board
The MAX1068CCEG+ suits compact data acquisition daughter boards that plug into single-board computers (SBCs) or FPGA-based instrumentation platforms. Its 24-pin QSOP footprint, SPI interface, and integrated reference make it an ideal single-IC front end for 4-channel 14-bit analog input modules that expose 0-3 V unipolar or +/-5 V bipolar ranges to the host. The 200 ksps throughput and deterministic latency simplify streaming captures to host processors over USB, Ethernet, or PCIe, while the automatic power-down mode keeps idle board current below milliampere levels for energy-constrained deployments.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk MAX1068CCEG+ — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | MAX1068BCEG+ | MAX1067BCEE+ | MAX1030BCEG+TG002 | MAX1011CEG+ | MAX1168ACEG+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 24-QSOP | 24-QSOP - same | 16-QSOP - different | 24-QSOP - same | 24-QSOP - same | 24-QSOP - same |
| Resolution | 14 bits | 14 bits | 14 bits | 12 bits | 14 bits | 16 bits |
| Input Channels | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI | Parallel | SPI/QSPI/MICROWIRE |
| Operating Temperature | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C | 0 C to +70 C |
Diferensiator Kunci
- Drop-in parametric equivalent with broader temperature range (vsMAX1068BCEG+)
- 16-bit resolution upgrade path in the same package (vsMAX1168ACEG+)
- Integrated reference and oscillator minimize BOM (vsDiscrete ADC + external reference designs)
Catatan Desain
Estimated: at AVDD = +5 V with active conversions at 200 ksps, the MAX1068CCEG+ draws approximately 5 mA from the analog supply and 1 mA from the digital supply. The automatic power-down mode reduces total current to under 1 uA between conversions, so firmware that bursts conversions every 10 ms can extend battery life by 100x. Decouple AVDD with a 10 uF bulk plus 0.1 uF ceramic placed within 5 mm of the pin, and route DVDD separately to keep digital switching noise from corrupting the reference.
Route the analog and digital ground returns separately to a star ground under the IC's exposed pad. Keep the SPI traces (SCLK, DOUT, DIN, CS) short and parallel to maintain timing margin at 4.8 MHz. Place the analog input RC filters (typically 1 kohm + 100 pF) as close to the AINx pins as possible to prevent charge injection from the multiplexer from coupling into the signal source.
Do not apply voltages to AIN0-AIN3 that exceed AVDD + 0.3 V or fall below AGND - 0.3 V; the inputs are not overvoltage tolerant. When using the internal reference, do not drive the REF pin with an external source, and add at least 1 uF of ceramic capacitance from REF to AGND to stabilize the reference buffer. For best 14-bit linearity, allow at least 1 ms after power-up before initiating conversions.
Informasi Konformitas
RoHS, REACH, and conflict-mineral status not explicitly stated in the verified data; contact Maxim Integrated for a material declaration. The + suffix in the part number indicates Maxim's standard lead-free / Pb-free finish per industry convention. AEC-Q100 is not applicable to this commercial-temperature-grade part.
