MAX110BCPE - 14-Bit Serial ADC, 2-Ch, ±5V, 16-PDIP | Maxim
MPN: MAX110BCPE ✓ AktifMAX110BCPE Ringkasan
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts a continuous analog input voltage into a discrete digital code representing the input's magnitude. Sigma-delta (Σ-Δ) ADCs like the MAX110 achieve high resolution and excellent noise immunity by oversampling the input at many times the Nyquist rate and shaping quantization noise out of the signal band; the MAX110 family adds on-chip auto-calibration to compensate offset and gain drift without requiring external trims. Within the broader taxonomy, the MAX110 sits in the data-converter sub-class of mixed-signal ICs, which itself belongs to the signal-conditioning and data-acquisition hierarchy used in industrial, instrumentation, and sensor-interface designs.
Key features of the MAX110BCPE include 2 differential input channels, a 50 SPS (samples-per-second) maximum throughput rate, an SPI/QSPI/MICROWIRE-compatible serial interface, and a true differential analog input topology. Internal digital calibration eliminates gain and offset errors at the conversion cycle, and a hardware shutdown pin reduces idle current to 4 µA, ideal for power-constrained portable instrumentation.
The MAX110 uses a switched-capacitor sigma-delta modulator front-end followed by a digital decimation filter, producing 14-bit effective resolution without requiring an external reference or precision components. This architecture favors low-frequency, high-accuracy applications over wideband audio or video digitizing, since the modulator samples at a high internal rate and the digital filter limits useful bandwidth.
Typical applications for the MAX110BCPE include weighing scales and load-cell readouts, panel meters and digital voltmeters, process-control analog front ends, temperature-pressure measurement via bridge sensors, portable battery-powered data loggers, and isolated sensor interfaces in industrial 4 mA to 20 mA loops. The combination of differential inputs, internal calibration, and serial output suits it well to systems that already include a microcontroller with an available SPI port.
When designing with the MAX110BCPE, ensure low-impedance analog ground return paths because the switched-capacitor input architecture draws brief transient currents on the input pins. Place 0.1 µF bypass capacitors as close as possible to the ±5V supply pins and the REF pin, and route the analog and digital grounds back to a single star point beneath the device to minimize conversion noise.
Alternatif penggantian untuk MAX110BCPE — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
MAX110BCPE+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX110ACPE+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX110BEPE+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX110BCAP+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX111BCPE+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MAX110BCPE Rating Maksimal & Karakteristik Listrik
| Resolusi | 14 bit |
| Number of Channels | 2 |
| Number of Inputs | 2 (differential) |
| Laju Pengambilan Sampel | 50 SPS |
| Architecture | Sigma-Delta (Σ-Δ) |
| Data Interface | Serial (SPI/QSPI/MICROWIRE-compatible) |
| Number of A/D Converters | 1 |
| Configuration | MUX-ADC |
| Input Type | Differential |
| Analog Supply Voltage | ±5 V |
| Digital Supply Voltage | ±5 V |
| Operating Supply Current | 550 µA |
| Power-Down Current | 4 µA |
| Suhu Kerja | 0 °C to +70 °C |
| Paket | 16-PDIP (0.300 in, 7.62 mm) |
| Tipe Mounting | Through-Hole |
| Status RoHS | Compliant (with + suffix variant; non-+ variant obsolete) |
Konfigurasi Pin MAX110BCPE
| Pin produk 1 | /CS — Chip-select for SPI serial interface, active low |
| Pin produk 2 | DOUT — Serial data output from ADC |
| Pin produk 3 | BUSY/DRDY — Busy or data-ready output, active low |
| Pin produk 4 | DGND — Digital ground |
| Pin produk 5 | IN1+ — Positive input of channel 1 differential pair |
| Pin produk 6 | IN1- — Negative input of channel 1 differential pair |
| Pin produk 7 | IN2+ — Positive input of channel 2 differential pair |
| Pin produk 8 | IN2- — Negative input of channel 2 differential pair |
| Pin produk 9 | REF- — Reference voltage negative input |
| Pin produk 10 | REF+ — Reference voltage positive input |
| Pin produk 11 | AGND — Analog ground |
| Pin produk 12 | /PD — Power-down control, active low, 4 µA shutdown |
| Pin produk 13 | V+ (A) — +5 V analog supply |
| Pin produk 14 | V- (A) — -5 V analog supply |
| Pin produk 15 | V+ (D) — +5 V digital supply |
| Pin produk 16 | SCLK — Serial clock input for SPI |
Aplikasi Umum
MAX110BCPE cocok untuk 6 aplikasis: Weighing Scale / Load-Cell Readout, Panel Meter and Digital Voltmeter, Process Control Analog Front End, Temperature / Pressure Sensor Interface, Portable Battery-Powered Data Logger, Isolated Sensor / 4-20 mA Loop Interface.
Weighing Scale / Load-Cell Readout
The MAX110BCPE's 14-bit resolution plus differential inputs maps directly to a bridge-type load cell, where the sensor output is a few millivolts on a common-mode voltage near 2.5 V. The on-chip auto-calibration removes offset and gain drift at every conversion, eliminating the periodic re-trim that discrete instrument amplifiers and 24-bit delta-sigma ADCs typically require for NIST-traceable scale accuracy. With ±5 V supplies and 550 µA typical quiescent current, a four-load-cell multiplexed platform can be ratiometric on the reference input, and the 4 µA shutdown current keeps battery backup scale designs below 10 µW idle power.
Direkomendasikan
Panel Meter and Digital Voltmeter
The 50 SPS throughput and 14-bit resolution of the MAX110BCPE make it well suited for 4-1/2-digit panel meters reading 0-2 V or 0-200 mV ranges with auto-zero between conversions. The 4 µA shutdown current lets a handheld DMM retain battery life between conversions, while the SPI-compatible serial output streams 16-bit words to a microcontroller that drives the LCD digits. Bipolar ±5 V analog inputs accept transducer signals directly when scaling to ±20 V using a simple input attenuator and ±5 V reference.
Direkomendasikan
Process Control Analog Front End
For process-control loops where PLC analog inputs read ±10 V or 4-20 mA signals, the MAX110BCPE gives a 14-bit signed result over the SPI bus directly, ready for proportional-integral control firmware on a microcontroller. Its sigma-delta front end rejects 50/60 Hz line noise common in industrial cabinets, and the differential inputs reject common-mode noise on long sensor runs. Two channels per package save a separate MUX and reduce PCB area in multi-loop systems.
Direkomendasikan
Temperature / Pressure Sensor Interface
Bridge-type pressure sensors and thermocouple cold-junction compensation circuits both produce low-level differential signals that the MAX110BCPE can resolve to 14-bit accuracy without external instrumentation amplifiers. Connecting both the sensor and a cold-junction reference diode to the two differential input channels yields a complete temperature-corrected pressure readout with no extra active components. The 4 µA power-down mode allows sampling at 1 Hz with >99% battery duty cycle budget.
Direkomendasikan
Portable Battery-Powered Data Logger
Battery-powered loggers benefit from the MAX110BCPE's 550 µA active / 4 µA shutdown current ratio, since most data acquisition is sample-and-sleep. Drawing under 100 µA averaged across typical log cycles, the converter can run for months from a single 9 V cell or two AA cells through a bipolar charge pump. SPI output streams directly to microcontroller Flash storage without an external analog front end, reducing both PCB area and idle power budget.
Direkomendasikan
Isolated Sensor / 4-20 mA Loop Interface
In isolated loop-powered transmitter modules, the MAX110BCPE delivers the conversion side of a 4-20 mA output with sufficient accuracy for industrial sensors (pressure, level, flow). When paired with a digital isolator on the SPI bus and a low-side current loop driver, it forms a complete analog input module. The differential inputs reject the ground potential differences introduced by long cable runs, and the auto-calibration compensates for temperature drift between calibration cycles.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk MAX110BCPE — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | MAX110BCPE+ | MAX110ACPE+ | MAX110BEPE+ | MAX110BCAP+ | MAX111BCPE+ |
|---|---|---|---|---|---|---|
| Package | 16-PDIP (0.300 in) | 16-PDIP (0.300 in) - same | 16-PDIP (0.300 in) - same | 16-PDIP (0.300 in) - same | 16-PDIP (0.300 in) - same | 16-PDIP (0.300 in) - same |
| Brand | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) - same | Maxim Integrated (Analog Devices) - same | Maxim Integrated (Analog Devices) - same | Maxim Integrated (Analog Devices) - same | Maxim Integrated (Analog Devices) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 50 SPS | 50 SPS | 50 SPS | 50 SPS | 50 SPS | 50 SPS |
| Analog Supply | ±5 V | ±5 V | ±5 V | ±5 V | ±5 V | +3 V or +5 V single supply |
| Operating Supply Current | 550 µA | 550 µA | 550 µA | 550 µA | 550 µA | ~200 µA |
| Shutdown Current | 4 µA | 4 µA | 4 µA | 4 µA | 4 µA | ~1 µA |
| Lifecycle Status | Obsolete (use MAX110BCPE+ for new designs) | Active | Active | Active | Active | Active |
| Input Channels | 2 differential | 2 differential | 2 differential | 2 differential | 2 differential | 2 differential |
Diferensiator Kunci
- Active production variant on exact same die and pinout (vsMAX110BCPE+)
- Tighter linearity and lower noise vs A-grade (vsMAX110ACPE+)
- Compatible pinout but different supply domain (vsMAX111BCPE+)
Catatan Desain
The MAX110BCPE requires separate analog and digital supplies, both at ±5 V. Place 0.1 µF ceramic bypass capacitors as close as possible to each supply pin (V+ A, V- A, V+ D) to suppress the high-frequency switching noise generated by the sigma-delta modulator. For optimal performance, generate the analog supplies from a low-noise LDO (such as the MAX603) rather than directly from the digital 5 V rail. Estimated: with 550 µA active supply current, a single 5 V LDO with 50 mA capacity provides 90% headroom.
Route analog and digital grounds back to a single star point located beneath the MAX110BCPE — never run separate analog and digital ground planes that overlap with high-speed logic signals. The switched-capacitor input architecture draws transient current spikes on the analog input pins at the modulator sampling frequency, and any shared ground impedance will couple those spikes into the conversion result. Use a wide, short trace from the AGND pin (pin 11) to the system analog ground star.
Do not use the MAX110BCPE for signals above ~4-5 kHz — the on-chip digital decimation filter limits useful bandwidth to below 1/12 of the maximum 50 SPS conversion rate. Exceeding the input common-mode range of (V− + 1.5 V) to (V+ − 1.5 V) will saturate the converter and may introduce long recovery times between conversions. The /PD pin should be tied high through a 100 kΩ resistor to prevent unintended shutdown during power-up.
Informasi Konformitas
RoHS compliance verified from DigiKey product listing for the MAX110BCPE+ variant. The non-'+' MAX110BCPE is obsolete and predates RoHS spec; do not specify it for new RoHS-restricted designs.
