MAX1082AEUE+TW - 10-Bit 400ksps 4-Ch SAR ADC | Maxim Integrated
MPN: MAX1082AEUE+TW ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.93 | $49.30 |
| 100 | $4.45 | $445.00 |
| 500 | $3.97 | $1,985.00 |
| 1,000 | $3.51 | $3,510.00 |
MAX1082AEUE+TW Overview
An SAR (Successive Approximation Register) ADC is a type of data converter that performs a binary search through the input voltage using an internal DAC and comparator, delivering a fixed conversion time independent of input magnitude. SAR ADCs occupy a middle ground between slow but precise delta-sigma ADCs and fast flash ADCs, making them the workhorse choice for industrial control, instrumentation, and multi-channel data-acquisition front-ends where deterministic latency and 8-12 bit resolution are required.
Key specifications of the MAX1082AEUE+TW include 400ksps sampling rate (300ksps variant MAX1083 also shares the family), 10-bit resolution with ±1 LSB linearity, four single-ended analog input channels multiplexed through an on-chip T/H (track-and-hold), an internal 4.096V reference, and an SPI/QSPI/MICROWIRE-compatible serial interface. The device operates from a single +5V analog supply and a separate +5V or +3V digital supply, drawing only 2.5 mA operating current.
The MAX1082AEUE+TW architecture combines an input MUX with a wide-bandwidth T/H front-end to settle 10-bit conversions in under 2.5 us, then shifts the result out through a 4-wire serial port. Internal software-configurable power-down reduces supply current to under 10 µA between conversions, enabling battery-friendly periodic-sampling designs.
Typical applications include industrial process control loops, weigh-scale and load-cell signal chains, portable battery instrumentation, multi-zone temperature monitoring, and 4-20 mA loop digitization. The internal 4.096V reference conveniently scales a 0-4V sensor output directly to full-scale 10-bit codes.
When designing with this ADC, place 0.1 uF and 10 uF decoupling capacitors as close as possible to the AVDD and DVDD pins and route the analog ground (REF_) and digital ground (DGND) as separate traces meeting only at the device GND pin. For highest DC accuracy, enable the internal reference and avoid injecting digital switching currents into the reference node.
Drop-in alternatives for MAX1082AEUE+TW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX1082AEUE+TW (same form factor and footprint) — differing in Package, Resolution, Architecture, Internal Reference Voltage, Power-Down Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1082AEUE+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1083AEUE+TW
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1082ACUE+T
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →MAX1082AEUE+TW Maximum Ratings & Electrical Characteristics
| Resolution | 10 bit |
| Sampling Rate | 400 ksps |
| Number of Channels | 4 (single-ended) |
| Architecture | SAR (Successive Approximation) |
| Input Voltage Range | 0 V to +5 V |
| Supply Voltage (Analog) | +4.75 V to +5.25 V |
| Supply Voltage (Digital) | +4.75 V to +5.25 V |
| Internal Reference | 4.096 V |
| External Reference Option | Yes |
| Interface | SPI/QSPI/MICROWIRE-compatible serial |
| Operating Supply Current | 2.5 mA typ |
| Power-Down Current | < 10 uA |
| Operating Temperature | -40 C to +85 C (industrial) |
| Package | 16-TSSOP (UE) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
MAX1082AEUE+TW Pin Configuration
| Pin 1 | AVDD — Analog +5V supply |
| Pin 2 | AIN1 — Analog input channel 1 |
| Pin 3 | AIN2 — Analog input channel 2 |
| Pin 4 | AIN3 — Analog input channel 3 |
| Pin 5 | AIN4 / REF- — Analog input channel 4 / reference ground sense |
| Pin 6 | REF — Reference I/O (4.096V internal) |
| Pin 7 | AGND — Analog ground |
| Pin 8 | SCLK — Serial clock input |
| Pin 9 | DOUT — Serial data output |
| Pin 10 | DIN — Serial data input (control word) |
| Pin 11 | CS — Active-low chip select |
| Pin 12 | DGND — Digital ground |
| Pin 13 | DVDD — Digital +5V supply |
| Pin 14 | SHDN — Active-low shutdown (tie high for normal operation) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Typical Applications
MAX1082AEUE+TW is suitable for 6 applications: Industrial Process Control, Weigh Scale / Load Cell Digitization, Portable Battery Instrumentation, Multi-Zone Temperature Monitoring, 4-20 mA Loop Digitization, Data Acquisition Front-End.
Industrial Process Control
The MAX1082AEUE+TW's four single-ended channels and 400 ksps throughput make it well suited to industrial process control loops where multiple sensors (temperature, pressure, flow) must be digitized for a PID controller. With its internal 4.096 V reference, a 0-4 V transducer output maps directly to full-scale 10-bit codes, eliminating the need for external reference circuitry. Unlike slower delta-sigma ADCs, the SAR architecture provides deterministic 2.5 us conversion latency, so the control loop can be tuned deterministically without waiting for output-data settling.
Recommended
Weigh Scale / Load Cell Digitization
Weigh scales need fast, low-noise digitization of strain-gauge bridge outputs. The MAX1082AEUE+TW's 400 ksps rate, integrated T/H, and 4.096 V internal reference provide 1 LSB = 4 mV quantization that pairs naturally with typical 1-3 mV/V load-cell sensitivities. The SAR architecture settles within one conversion cycle, so successive samples can be averaged digitally to improve effective resolution without waiting for sinc-filter settling time. Power-down mode below 10 uA enables battery-powered portable scales.
Recommended
Portable Battery Instrumentation
Battery-powered handheld instruments benefit from the MAX1082AEUE+TW's 2.5 mA operating current and software-activated power-down below 10 uA. In a typical handheld multimeter or data logger the ADC wakes on a timer, performs a burst of conversions across the four input channels, then returns to sleep. The single +5 V supply simplifies power design because most portable instruments already include a boost converter for the analog rail. The industrial -40 C to +85 C temperature grade supports outdoor field work.
Recommended
Multi-Zone Temperature Monitoring
Four-channel 10-bit SAR conversion is a sweet spot for multi-zone temperature monitoring in HVAC, refrigeration, or industrial oven control. The MAX1082AEUE+TW sequentially digitizes up to four thermocouple, thermistor, or RTD-conditioned signals at 400 ksps aggregate, allowing 100 kHz-per-channel update rate when scanning all four zones. Combined with the integrated reference, the design reduces external component count to a minimum - critical for densely populated multi-zone controller boards.
Recommended
4-20 mA Loop Digitization
Industrial 4-20 mA current loops carry sensor data over long distances and require a single-ended input ADC with high common-mode tolerance. The MAX1082AEUE+TW's 0-5 V input maps a 250 ohm sense resistor directly into 1-4 V ADC codes for convenient engineering-unit conversion. The 400 ksps sample rate supports multi-loop scanning on a single ADC, replacing several dedicated loop receivers. The integrated reference eliminates drift concerns in long-term loop monitoring.
Recommended
Data Acquisition Front-End
Multi-channel data-acquisition front-ends in test equipment, vibration analyzers, and bench instruments benefit from the MAX1082AEUE+TW's deterministic SAR latency and four-channel MUX. Unlike sigma-delta ADCs that introduce group delay proportional to oversampling ratio, the MAX1082 settles in a fixed 2.5 us, so signal-analysis routines such as FFTs run with deterministic phase. The 4-wire SPI interface enables direct connection to a host MCU/DSP without logic-level shifters, keeping BOM small.
Recommended
Recommended Products Summary
Engineering reference data for MAX1082AEUE+TW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1082AEUE+ | MAX1083AEUE+TW | MAX1082ACUE+T |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 16-TSSOP (UE) | 16-TSSOP (UE) - same | 16-TSSOP (UE) - same | 16-TSSOP (UE) - same |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 400 ksps | 400 ksps | 300 ksps (-25%) | 400 ksps |
| Number of Channels | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Temperature Grade | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Commercial 0 C to +70 C |
| Packaging Format | Tape & Reel (+TW) | Tube (no +TW) | Tape & Reel (+TW) | Tape & Reel (+T) |
Key Differentiators
- Highest sampling rate in MAX1082/1083 family (vs MAX1083AEUE+TW)
- Industrial temperature grade for harsh environments (vs MAX1082ACUE+T)
- Tape-and-reel packaging for high-volume assembly (vs MAX1082AEUE+)
Design Notes
Decouple AVDD (pin 1) and DVDD (pin 13) with a parallel combination of 0.1 uF (high-frequency) and 10 uF (low-frequency) ceramic capacitors placed as close as possible to each supply pin. The MAX1082AEUE+TW separates analog and digital grounds (AGND pin 7 and DGND pin 12) - tie these together only at the device GND pin to avoid injecting digital switching currents into the analog reference node. Power-down current below 10 uA makes the device suitable for battery-driven periodic-sampling designs.
Route the SCLK, DIN, DOUT, and active-low CS traces as a bus with ground traces between them to minimize digital-to-analog coupling. Keep analog input traces short and guarded with ground traces, especially for high-impedance sensor sources. Place the REF decoupling capacitor (typically 0.1 uF in parallel with 4.7 uF) directly between the REF pin (6) and AGND. The TSSOP-16 thermal pad (BACK-IDE) is not present on this 16-pin package, so copper area under the IC is purely for ground stitching, not heatsinking.
Estimated: applying more than +5.25 V to AVDD/DVDD permanently damages the device. Always sequence the analog supply before the digital supply or hold the device in shutdown (active-low SHDN pulled low) until both rails are stable. Avoid leaving any analog input floating - tie unused AIN pins to AGND or a known mid-supply voltage to prevent the T/H from drifting. The internal 4.096 V reference requires at least 1 mA of bypass capacitance and is not designed to source external circuits; for external reference drives, set the internal reference to power-down mode and drive REF from a low-impedance external buffer.
Compliance Information
RoHS and lead-free per Maxim Integrated product page. Industrial temperature grade; not AEC-Q100 qualified (automotive).
