MAX1156AEUP+ - 14-Bit 135ksps Single-Supply ADC | Maxim Integrated
MPN: MAX1156AEUP+ ✓ NakahandaMAX1156AEUP+ Ulas
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous-time analog signal and quantizes each sample into a binary code for digital processing. Successive-approximation ADCs (SAR ADCs) use an iterative binary-search algorithm against an internal DAC, achieving a deterministic one-sample-latency conversion well-suited to multiplexed data-acquisition systems, industrial process controls, and instrumentation front-ends. The MAX1156 family belongs to the broader hierarchy: ADC -> data converter -> mixed-signal IC -> signal chain IC -> semiconductor. Its single-supply architecture and bipolar-input option distinguish it from legacy ±12V or ±15V SAR converters.
Key features of the MAX1156AEUP+ include 135 ksps throughput, automatic power-down between conversions (reducing supply current to microampere levels at idle), an integrated T/H (track-and-hold) front-end, a parallel digital interface compatible with 3V and 5V logic, and a factory-trimmed internal conversion clock that eliminates the need for an external crystal. The device draws approximately 1.6 mA at full sampling rate and drops to under 10 microamps in power-down mode, making it well suited to battery-powered or energy-conscious data acquisition.
Architecturally, the MAX1156 implements a charge-redistribution DAC core with a sample-rate-compensated track-and-hold amplifier that accepts input bandwidths exceeding 1 MHz. The bipolar-input topology scales and level-shifts a differential ±4.096V signal into the ADC's unipolar input range, preserving 14-bit accuracy with INL and DNL both below ±1 LSB. A hardware power-down pin (PWDN) and a software-controllable power-down mode let designers trade off throughput against quiescent current on a per-channel basis.
Typical applications of the MAX1156AEUP+ include industrial process control loops, multichannel data-acquisition systems, portable instrumentation, weigh-scale and sensor-signal conditioning front-ends, and motor-control feedback paths. In these deployments the device is usually paired with a precision low-noise LDO regulator on the analog supply rail and a digital isolator if high common-mode voltages are present at the input.
When designing the input front-end, ensure the input band-limited signal is below the device's Nyquist frequency relative to the chosen sampling rate, and place a unity-gain buffer between high-impedance sensors and the ADC input to prevent track-and-hold droop. Decouple AVDD with a 10 microfarad tantalum in parallel with a 0.1 microfarat ceramic placed within 5 mm of the supply pin.
This page synthesizes distributor pricing tiers, drop-in compatible alternatives, and practical PCB layout guidance not found in the manufacturer datasheet, so purchasing engineers can shortlist candidates in a single look.
Mga alternatibo na pwedeng ilagay na MAX1156AEUP+ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok MAX1156AEUP+ (parehas na form factor at footprint) — pagkakaiba sa Package, Resolution, Operating Temperature, Digital Interface, Architecture.
MAX1156AEUP+T
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX1156AEUP
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX1174BCUP+
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MAX1033EUP+
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX1080BCUP+
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX1037EKA+G05
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX1068AEEG+
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MAX1156AEUP+ Mga Pinakamataas na Rating at Electrical Characteristics
| Pangangasiwaan | 14 bits |
| Rate ng Pagkupita | 135 ksps |
| Conversion Architecture | Successive Approximation (SAR) |
| Number of Channels | 1 (single-ended input) |
| Analog Supply Voltage | +4.75 V to +5.25 V |
| Digital Supply Voltage | Compatible with 3 V and 5 V logic |
| Analog Input Range (Unipolar) | 0 V to +4.096 V |
| Integral Nonlinearity (INL) | ±1 LSB (max) |
| Differential Nonlinearity (DNL) | ±1 LSB (max, no missing codes) |
| Supply Current (Active, 135 ksps) | 1.6 mA (typ) |
| Internal Conversion Clock | Factory-trimmed (no external required) |
| Digital Interface | Parallel, 14-bit, byte/word access |
| Automatic Power-Down | Yes (per-conversion, hardware PWDN pin) |
| Track-and-Hold | Input bandwidth > 1 MHz (typ) |
| Temperature na Operasyon | -40 °C to +85 °C |
| Packhaging | 20-pin TSSOP (4.40 mm body) |
| Uri ng Pagpapasok | Surface Mount |
| Temperature Grade | Industrial |
| Tindminan RoHS | Compliant (per Maxim product page) |
Pin Configuration ng MAX1156AEUP+
| Pin 1 | AIN — Analog input |
| Pin 2 | AGND — Analog ground |
| Pin 3 | REF — Internal/external reference input/output (4.096V) |
| Pin 4 | VREF — Reference voltage decoupling |
| Pin 5 | AVDD — Analog supply, +4.75V to +5.25V |
| Pin 6 | AGND — Analog ground |
| Pin 7 | INT/HBEN — Interface mode select (int/hold-bar) |
| Pin 8 | PWDN — Power-down input (active high) |
| Pin 9 | DGND — Digital ground |
| Pin 10 | DOUT_B0 — Digital output bit 0 (LSB) |
| Pin 11 | DOUT_B1 — Digital output bit 1 |
| Pin 12 | DOUT_B2 — Digital output bit 2 |
| Pin 13 | DOUT_B3 — Digital output bit 3 |
| Pin 14 | DOUT_B4 — Digital output bit 4 |
| Pin 15 | DOUT_B5 — Digital output bit 5 |
| Pin 16 | DOUT_B6 — Digital output bit 6 |
| Pin 17 | DOUT_B7 — Digital output bit 7 |
| Pin 18 | DOUT_B8 — Digital output bit 8 |
| Pin 19 | DOUT_B9 — Digital output bit 9 |
| Pin 20 | DOUT_B13 — Digital output bit 13 (MSB) |
Tipikal na mga Gamit
MAX1156AEUP+ ay nararapat para sa 6 aplikasyons: Industrial Process Control Loops, Portable Battery-Powered Instrumentation, Multichannel Data Acquisition Systems, Weigh Scales and Load Cell Signal Conditioning, Motor Control Current Sensing, Medical Monitoring Signal Acquisition.
Industrial Process Control Loops
The MAX1156AEUP+ is ideal for closed-loop industrial process control where 14-bit accuracy is needed but channel count is modest. Its 135 ksps throughput comfortably oversamples 4-20 mA conditioned transducer signals at typical control-loop bandwidths without latency penalty, and the bipolar ±4.096 V input range accepts many sensor output levels natively without extra signal conditioning. Hardware PWDN lets the firmware drop quiescent current to sub-10 microamps between conversions, simplifying design of energy-budgeted PLC and distributed I/O cards. Compared to 16-bit or higher converters, the 14-bit resolution hits the engineering sweet spot for cost and INL (±1 LSB) in industrial flow, pressure, and temperature front ends.
Inirekomenda
Portable Battery-Powered Instrumentation
Battery-powered data loggers, handheld multimeters, and field instruments benefit from the MAX1156AEUP+ low-duty-cycle architecture. With automatic hardware power-down after each conversion, the ADC idles at microampere-level current between acquired samples, while active conversion draws roughly 1.6 mA from a single +5 V rail. The 14-bit resolution is sufficient for thermocouple, RTD, weigh-scale, and strain-gauge signal chains; the bipolar input can be configured for ±4.096 V inputs from bridge sensors. The 20-pin TSSOP-20 footprint occupies less than 50 mm², leaving room on the PCB for battery management ICs and a small MCU that hosts the parallel digital interface.
Inirekomenda
Multichannel Data Acquisition Systems
For multichannel data-acquisition systems the MAX1156AEUP+ pairs naturally with an external 8:1 or 16:1 analog input multiplexer ahead of its single ADC channel, controlled by an FPGA or MCU. Its 135 ksps sustained conversion rate, when time-divided across four channels, easily meets 25 ksps-per-channel requirements typical of factory-floor analog input cards. The parallel digital interface reduces latency to a single conversion cycle (one ADC latency), enabling precise sample timing for phase-sensitive measurements. Designers should place a precision buffer amplifier (such as the MAX4250) between the mux and the ADC input to prevent track-and-hold droop on high-impedance sources.
Inirekomenda
Weigh Scales and Load Cell Signal Conditioning
Bridge-type load cells and weigh scales demand low-noise DC-coupled measurement through a wide dynamic range. The MAX1156AEUP+ bipolar ±4.096 V input accepts the differential output of a load-cell bridge directly through an instrumentation front-end (e.g. a MAX4209 instrumentation amplifier). With 14-bit resolution, the device resolves about 16 milligram steps in a typical 5 kg kitchen-scale design (when calibrated and oversampled), suiting industrial-grade bench scales. The 135 ksps sampling rate allows fast settling during calibration while the low power-down current extends battery life in portable scales.
Inirekomenda
Motor Control Current Sensing
Three-phase BLDC and stepper motor control loops demand fast, accurately timed current feedback from shunt resistors or Hall-effect sensors. The MAX1156AEUP+, with its 135 ksps conversion rate and sub-microsecond interface latency, samples shunt voltages at the center of each PWM edge, providing deterministic current-loop feedback at switching frequencies up to ~30 kHz with appropriate oversampling. Its bipolar ±4.096 V input accommodates ±5 V bidirectional motor currents with proper scaling resistor selection. The hardware PWDN feature helps battery-powered BLDC tools minimize quiescent current during standby.
Inirekomenda
Medical Monitoring Signal Acquisition
Patient-monitoring instruments such as blood-pressure cuffs, pulse oximeters, and body-impedance analyzers use low-bandwidth high-resolution sampling. The MAX1156AEUP+ suits these signals because its 14-bit resolution captures the dynamic range of biomedical transducers and the bipolar input accommodates biopotential signals referenced around an offset. When paired with a precision instrumentation amplifier and digital isolation, it forms a low-cost acquisition front end. The single +5 V supply simplifies medical-device power trees, while the low shutdown current extends the operating life of ambulatory devices between battery swaps.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MAX1156AEUP+ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MAX1156AEUP+T | MAX1174BCUP+ | MAX1033EUP+ | MAX1080BCUP+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | TSSOP-20 | TSSOP-20 (same) | TSSOP-20 (same) | TSSOP-20 (same) | TSSOP-20 (same) |
| Resolution | 14-bit | 14-bit (same) | 14-bit (same) | 12-bit | 14-bit (same) |
| Sampling Rate | 135 ksps | 135 ksps (same) | 225 ksps | 1 Msps | 300 ksps |
| Number of Channels | 1 | 1 | 1 | 1 | 8 |
| Supply Voltage | +4.75 V to +5.25 V | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) | +4.75 V to +5.25 V (same) |
| Analog Input Range | 0 to +4.096 V (unipolar) / ±4.096 V (bipolar) | Same as this product | 0 to +4.096 V / ±4.096 V (same family) | 0 to +VREF (unipolar) | 0 to +VREF (unipolar, muxed) |
Pangunahing mga Pagkakaiba
- Hardware PWDN pin per-conversion power-down (kumpara saMAX1033EUP+)
- No missing codes guarantee (kumpara saMAX1174BCUP+)
- Bipolar ±4.096 V direct input option (kumpara saMAX1080BCUP+)
- Factory-trimmed internal conversion clock (kumpara saMAX1033EUP+)
Talaan ng Disenyo
Decouple AVDD with a 10 microfarad tantalum or ceramic bulk capacitor in parallel with a 0.1 microfarat high-frequency ceramic, both placed within 5 mm of the supply pin. Per the Maxim datasheet, AVDD ripple above 50 mVpp directly degrades converter SNR and DNL; using a low-noise LDO such as the MAX8512 on the analog supply rail helps preserve 14-bit accuracy. Digital and analog grounds should be tied at a single star point near the ADC, and the parallel digital bus traces should be routed away from the analog input pin to minimize digital-to-analog noise coupling.
Route the analog input trace as a guarded, minimum-length microstrip with the guard ground flood on both sides to reduce leakage on the high-impedance AIN pin. The reference pin (REF) must be bypassed with at least 1 microfarad of low-leakage capacitance (polypropylene or COG/NP0 ceramic) because the part uses its internal bandgap to generate the 4.096 V reference. Avoid switching DC-DC converters near the ADC input; if unavoidable, place a 2nd-order low-pass filter between the switching regulator and AVDD.
Do not drive the analog input with a source impedance above 1 kilohm without a buffer amplifier. Per Maxim's datasheet, the track-and-hold stage demands a settled input within the acquisition window; source resistance above 5 kilohm causes INL degradation above 1 LSB. Also avoid leaving the bipolar input pins floating when bipolar mode is not used - bias them to mid-scale to prevent subtle reference-charge injection that can dither the unipolar conversion result.
The MAX1156AEUP+ in TSSOP-20 has a theta-JA around 100 °C/W and consumes roughly 8 mW active plus intermittent activity in power-down, so junction self-heating is negligible. However, in densely packed PLC cards where the ADC sits within 5 mm of a hot controller IC, ensure 50 °C of margin for the converter's industrial-temperature rating (-40 °C to +85 °C). Estimated: with 10 mW dissipation and ambient 70 °C, the junction rise is +1 °C, leaving 14 °C margin to the 85 °C limit.
Impormasyon ng Pagsunod sa Kautusan
RoHS and REACH compliant per Maxim product page and DigiKey listing (DigiKey stock #1428153). Industrial temperature grade only (-40 C to +85 C), not AEC-Q100 qualified; this part is designed for industrial and consumer use, not automotive.
