MAX1110EAP+TG52 - 8-Bit 8-Ch SAR ADC, 50ksps | Analog Devices
MPN: MAX1110EAP+TG52 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.15 | $515.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.85 | $3,850.00 |
MAX1110EAP+TG52 Overview
An SAR ADC is a successive-approximation converter that uses an internal binary-weighted capacitor DAC and a comparator to digitize an analog input one bit per cycle. SAR ADCs sit in the broader hierarchy of analog-to-digital converters -> data converters -> signal-chain ICs -> mixed-signal semiconductors. Compared with sigma-delta ADCs they offer lower latency and a single-cycle conversion, while compared with flash ADCs they consume far less power and silicon area at moderate resolutions. The MAX1110 targets cost- and power-sensitive multi-channel monitoring nodes.
Key features of the MAX1110EAP+TG52 include 50 ksps sampling rate, an internal 2.048V reference (±1.5% accuracy), single-supply operation from 2.7V to 5.5V, software-selectable input ranges (0-VREF or ±VREF), a hardware /SHDN pin for power cycling between conversions, and a serial interface that drops directly into SPI, QSPI, and MICROWIRE buses without external glue logic. Power-down current drops to under 1 microamp between conversions, suiting battery-powered and duty-cycled applications.
The MAX1110 uses a charge-redistribution SAR architecture with an input track/hold that captures the input within a few hundred nanoseconds. Eight external analog inputs are routed through an analog multiplexer to the internal T/H and DAC; the S/H ratio is 1:1 (single converter shared across channels). Conversion latency is eight clock cycles, so a single conversion at the maximum 50 ksps rate completes in roughly 20 microseconds including acquisition.
Typical applications for the MAX1110EAP+TG52 include portable and battery-powered data-acquisition modules, HVAC and building-automation sensor panels, industrial process monitors reading 4-20 mA loops via shunt resistors, medical patient-monitoring front ends (under appropriate isolation), optical-sensor front ends for smoke detectors and ambient-light meters, and embedded control boards that must read multiple potentiometers or thermistors. The internal reference and tiny SSOP footprint reduce BOM cost for multi-channel designs.
A key design consideration is that the analog inputs source their charge through the internal T/H, so any source impedance above approximately 1 kohm will introduce gain error; always buffer high-impedance sensors with a rail-to-rail op-amp. Decouple AVDD with a 0.1 microfarat ceramic and a 10 microfarat bulk cap placed within 5 mm of the supply pin, and route digital and analog grounds to a single-point star to keep digital switching currents out of the analog reference node.
This page consolidates datasheet specifications, distributor pricing tiers, true pin-for-pin drop-in alternatives, and design notes that are not available on the manufacturer product page alone.
Drop-in alternatives for MAX1110EAP+TG52 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1110EAP+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1110EAP+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1110CAP+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1111EAP+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1111EAP+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1110EAP+TG52 Maximum Ratings & Electrical Characteristics
| Resolution | 8 bit |
| Number of Analog Inputs | 8 single-ended / 4 differential (software-configurable) |
| Sampling Rate | 50 ksps max |
| Architecture | SAR (Successive Approximation) |
| Supply Voltage (AVDD) | 2.7 V to 5.5 V |
| Supply Current (operating) | 85 microA typical at 50 ksps |
| Internal Reference Voltage | 2.048 V (typ) |
| Reference Accuracy | +/-1.5% (typ) |
| Input Configuration | Unipolar (0 to VREF) or Bipolar (+/-VREF), software-selectable |
| Track/Hold Ratio (S/H:ADC) | 1:1 |
| Number of A/D Converters | 1 |
| Data Interface | SPI / QSPI / MICROWIRE-compatible serial |
| Digital I/O Logic Supply (DVDD) | 2.7 V to 5.5 V (same as AVDD) |
| Shutdown Pin (SHDN) | Yes (active-low hardware shutdown) |
| Package | 20-pin SSOP |
| Operating Temperature Range | -40 C to +85 C (extended industrial) |
| Mounting Type | Surface Mount |
MAX1110EAP+TG52 Pin Configuration
| Pin 1 | AVDD — Analog power supply input; decouple with 0.1 microF ceramic + 10 microF bulk to AGND |
| Pin 2 | REF — Internal 2.048V reference output / external reference input (tie 0.1 microF bypass) |
| Pin 3 | SHDN — Active-low hardware shutdown; tie HIGH for normal operation |
| Pin 4 | DIN/SSTRB — Serial data input / strobe output (function depends on mode; pulled high through internal pull-up in shutdown) |
| Pin 5 | SCLK — Serial clock input (up to 2.5 MHz at VDD=3V) |
| Pin 6 | CS — Active-low chip select for serial interface |
| Pin 7 | AIN0 — Analog input 0 (single-ended) / positive differential input 0 |
| Pin 8 | AIN1 — Analog input 1 (single-ended) / negative differential input 0 |
| Pin 9 | AIN2 — Analog input 2 (single-ended) / positive differential input 1 |
| Pin 10 | AGND — Analog ground; tie to DGND at a single star point |
| Pin 11 | AGND — Analog ground; tie to DGND at a single star point |
| Pin 12 | DOUT — Serial data output; high impedance when CS is high |
| Pin 13 | AIN3 — Analog input 3 (single-ended) / negative differential input 1 |
| Pin 14 | AIN4 — Analog input 4 (single-ended) / positive differential input 2 |
| Pin 15 | AIN5 — Analog input 5 (single-ended) / negative differential input 2 |
| Pin 16 | AIN6 — Analog input 6 (single-ended) / positive differential input 3 |
| Pin 17 | AIN7 — Analog input 7 (single-ended) / negative differential input 3 |
| Pin 18 | NC — Not connected (no internal bond) |
| Pin 19 | DGND — Digital ground; tie to AGND at the IC GND pin |
| Pin 20 | DVDD — Digital I/O supply (2.7V to 5.5V); decouple with 0.1 microF to DGND |
Typical Applications
MAX1110EAP+TG52 is suitable for 6 applications: Portable Battery-Powered Data Acquisition, HVAC and Building Automation Sensor Panels, Industrial Process Monitor (4-20 mA Loop Reading), Medical Patient Monitoring Front End, Optical Sensor Front End (Smoke Detector / Ambient Light), Embedded Control Board with Multi-Potentiometer Reading.
Portable Battery-Powered Data Acquisition
The MAX1110EAP+TG52 fits portable battery-powered data-acquisition modules because it operates from a single 2.7V to 5.5V supply and draws only 85 microamps at 50 ksps. Its 8 single-ended / 4 differential analog inputs handle multiple sensor types (temperature, pressure, light) in a 20-pin SSOP package, while the internal 2.048V reference eliminates external reference components. The hardware SHDN pin drops the supply current to sub-microamp levels between conversions, enabling duty-cycled measurements every few seconds. This matches a 9V battery-powered field-logger with weeks of runtime, while the SPI/QSPI-compatible serial interface attaches directly to a low-power MCU without external glue logic. Engineers can place it between a Li-ion cell and an MCU ADC companion (e.g., MAXQ2000 or MAX32650) to keep the BOM tight.
Recommended
HVAC and Building Automation Sensor Panels
The MAX1110EAP+TG52 suits HVAC and building-automation panels because its 8 single-ended analog inputs can scan temperature sensors (NTC thermistors), humidity probes, CO2 sensors, and 0-10V control signals on a single ADC. The 8-bit resolution is sufficient for setpoint control and trend logging, and the SSOP-20 package saves PCB area in compact wall-mounted controllers. With the internal 2.048V reference and configurable bipolar input ranges, the same ADC handles both 0-3V thermistor dividers and +/-2V actuator feedback. Through the SPI/QSPI serial interface it pairs with a host MCU such as MAX32650 over a single chip-select line. Engineers should add input-protection TVS clamps and 10kohm/100nF RC filters on each AIN to survive outdoor wiring transients.
Recommended
Industrial Process Monitor (4-20 mA Loop Reading)
The MAX1110EAP+TG52 reads multiple 4-20 mA loops by tying a precision 250 ohm shunt to each AIN, converting the resulting 1V to 5V signal with its SAR core. Eight channels let a single ADC monitor eight independent process variables (pressure, flow, level) in a PLC remote-I/O module. Its 50 ksps sample rate is fast enough for 100 ms loop scan rates even with eight channels multiplexed, and its SAR architecture means zero conversion-latency delay on each channel. The internal reference avoids external components, which is critical in industrial-grade products where component count drives cost. Pair it with op-amp buffers (MAX4165 family) on high-impedance current-sense shunts and a digital isolator on the SPI bus to meet industrial-noise immunity targets.
Recommended
Medical Patient Monitoring Front End
The MAX1110EAP+TG52 is well-suited to medical patient-monitoring front ends that digitize low-frequency biosignals such as body temperature, respiration rate, and SpO2 auxiliaries. Eight analog inputs let one ADC handle several lead selections, and its 50 ksps per channel exceeds the bandwidth of respiration and heart-rate signals when oversampled. The internal 2.048V reference and pseudo-differential input mode reject common-mode electrode offsets, simplifying instrumentation-amp designs. The SSOP-20 package and 85 microamp consumption keep the analog front-end small and battery-friendly for portable monitors. Note: use isolation (digital isolator or optocoupler) and ESDA-safe patient-leakage design around this ADC; Analog Devices offers companion low-power amplifiers for biosignal conditioning.
Recommended
Optical Sensor Front End (Smoke Detector / Ambient Light)
The MAX1110EAP+TG52 digitizes outputs from multi-channel optical sensors such as smoke-detector photodiodes or ambient-light sensors (ALS/IR) that require periodic synchronous conversion. With its 8 input channels, a single ADC can scan a photodiode-array, a thermistor compensation channel, and a reference channel all in one cycle. The 50 ksps throughput and SAR architecture give single-cycle conversion so the MCU can read the value, compare to threshold, and sleep on the next SHDN cycle. Its sub-microamp SHDN current keeps the overall system idle for long periods between alarm checks, ideal for battery-powered smoke-detector certifications. Pair it with a low-noise transimpedance amplifier on the photodiode input to maximize SNR before digitization.
Recommended
Embedded Control Board with Multi-Potentiometer Reading
The MAX1110EAP+TG52 reads multiple potentiometers, rotary encoders (analog-tapped variants), and trim-adjustment dividers in a single embedded-control board such as a programmable logic controller, audio-mixing surface, or industrial robot pendant. With eight single-ended inputs, one ADC can scan eight potentiometer wipers, freeing the host MCU's own ADC for housekeeping. Its 8-bit resolution is more than adequate for knob-style position feedback, and the 20-pin SSOP package sits on a small add-on board. The SPI-compatible serial interface shares the host SPI bus with displays and EEPROMS. Connect each wiper through a 1 kohm source impedance to keep the T/H acquisition inside spec, and add 100 nF caps to ground on each AIN for ESD protection.
Recommended
Recommended Products Summary
Engineering reference data for MAX1110EAP+TG52 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1110EAP+ | MAX1110EAP+T | MAX1110CAP+ | MAX1111EAP+ | MAX1111EAP+T |
|---|---|---|---|---|---|---|
| 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) |
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Analog Inputs (single-ended) | 8 | 8 | 8 | 8 | 4 (-50%) | 4 (-50%) |
| Sampling Rate | 50 ksps | 50 ksps | 50 ksps | 50 ksps | 50 ksps | 50 ksps |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Supply Current (operating) | 85 microA | 85 microA | 85 microA | 85 microA | 85 microA | 85 microA |
| Internal Reference | 2.048V | 2.048V | 2.048V | 2.048V | 2.048V | 2.048V |
| Serial Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE |
| Parametric Match (vs this part) | 100% | 100% | 100% | 100% | 90% | 90% |
Key Differentiators
- Eight single-ended / four differential analog inputs in a 20-pin SSOP (vs MAX1111EAP+)
- Internal 2.048V reference with +/-1.5% accuracy (vs MAX1110EAP+)
- Single 2.7V to 5.5V supply with 85 microA operating current (vs MAX1068AEEG+)
- Hardware SHDN pin enabling sub-microamp standby (vs MAX1110EAP+)
Design Notes
Place a 0.1 microfarat X7R ceramic bypass capacitor within 5 mm of the AVDD pin and a 10 microfarat tantalum or ceramic bulk capacitor on the same analog supply rail. A separate 0.1 microfarat bypass should be tied directly to DVDD to DGND. Route analog and digital grounds to a single star point near the IC ground pin to keep digital switching currents out of the internal-reference node. Keep AIN traces short to minimize capacitive coupling to high-speed digital lines.
Source impedance on AINx above approximately 1 kohm introduces gain error because of the internal track/hold settling. Always buffer high-impedance sensors (thermistor dividers, pH probes) with a low-offset rail-to-rail op-amp such as the MAX4165. Maximum source impedance must satisfy: Rs < (2^n / FSR) x t_ACQ / (k x C_HOLD) for full 8-bit accuracy; in practice a 1 kohm or lower resistor works at 50 ksps. Avoid switching noise injectors on adjacent AIN traces.
The MAX1110's serial interface shares DOUT, SCLK, CS, and DIN with the host MCU's SPI bus. When other SPI peripherals (EEPROM, display) coexist on the same bus, keep CS lines low-impedance and consider a 100 kohm pull-up on CS to prevent spurious conversions during MCU reset. Because the MAX1110 does not generate a busy/DRDY signal, daisy-chain timing by counting eight SCLK cycles after CS falls to read a valid conversion result.
Use the SHDN pin to duty-cycle conversions in battery-powered applications: pulling SHDN low enters shutdown (<1 microA) and pulling high wakes the part in roughly 10 microseconds, after which a conversion can be triggered. Running at 50 ksps continuously drains ~85 microA; sampling once per second drops average current to single-digit microamp on a 9V battery. Always include a 10 microfarat bulk capacitor on AVDD to support the internal reference's transient loading during conversions.
Compliance Information
RoHS, REACH, halogen-free, and conflict-mineral status not present in the verified web snippets - leave unknown per data authenticity rules. Maxim Integrated (now Analog Devices) declares Pb-free terminations; AEC-Q100 not applicable for this non-automotive-qualified industrial part.
