MAX1177CEUP+T - 16-Bit 135ksps SAR ADC | Maxim | 20-TSSOP
MPN: MAX1177CEUP+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.67 | $12.67 |
| 10 | $11.4 | $114.00 |
| 100 | $10.15 | $1,015.00 |
| 500 | $9.05 | $4,525.00 |
| 1,000 | $8.45 | $8,450.00 |
MAX1177CEUP+T Overview
A SAR ADC is a type of analog-to-digital converter that resolves a single bit per internal clock cycle using a switched-capacitor comparator and a precision DAC. Compared to delta-sigma and pipeline ADCs, SAR architectures deliver deterministic latency, no pipeline delay, and excellent DC linearity, which is why they dominate multiplexed multi-channel data-acquisition systems, closed-loop control loops, and precision sensor readouts.
Key differentiating features of the MAX1177CEUP+T include ±0.5 LSB INL (typ), ±0.5 LSB DNL (no missing codes guaranteed), 84 dB SINAD at 10 kHz input, and an internal 4.096V reference that can be overdriven by an external source for ratiometric measurements. The TSSOP-20 package occupies less than 50 mm² of PCB area, while the input span can be programmed with two external resistors for unipolar 0-10V or bipolar ±10V, ±5V, 0-5V operation.
The SAR architecture combined with the on-chip track-and-hold amplifier captures full-scale settling in 250 ns, enabling accurate sampling of multiplexed signals without an external front-end buffer in many designs. Byte-wide parallel output allows direct connection to 8-bit microcontroller buses or FIFO memories.
Typical applications include industrial process control (4-20 mA loop readback after I/V conversion), multi-channel data-acquisition systems, portable instrumentation, and battery-powered sensor measurement front-ends where power-down between conversions minimizes idle drain.
When designing with this device, ensure the analog and digital grounds are tied at a single star point under the IC to avoid digital switching noise coupling into the SAR comparator, and place the 10 µF + 0.1 µF bypass network within 5 mm of the AVDD pin. Sample-rate-dependent power dissipation must be evaluated against the TSSOP-20 84 °C/W θJA; for 6.7 mW typical dissipation the junction rise is well under 1 °C and a heatsink is unnecessary.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for MAX1177CEUP+T — 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 MAX1177CEUP+T (same form factor and footprint) — differing in Resolution, Package, Analog Input Range, Digital Interface, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1177CCUP+T
✅ Drop-In✓ In Stock
$7.4 / Unit
View Datasheet →MAX1147BEUP+T
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.7 / Unit
View Datasheet →MAX1156AEUP+T
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.8 / Unit
View Datasheet →MAX1154AEUE+T
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.45 / Unit
View Datasheet →MAX1177CEUP+
✅ Drop-In✓ In Stock
$8.5 / Unit
View Datasheet →MAX1177CEUP+T Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 single-ended / 1 pseudo-differential |
| Sample Rate | 135 ksps |
| Analog Supply Voltage | +4.75 V to +5.25 V (5 V nominal) |
| Digital Supply Voltage | +2.7 V to +5.25 V |
| Input Voltage Range | 0 V to +4.096 V (internal ref); up to ±10 V with external resistors |
| Reference Voltage | 4.096 V internal (external overdrive allowed) |
| INL (max) | ±2 LSB |
| DNL (max) | ±1 LSB (no missing codes) |
| SINAD | 84 dB at fin = 10 kHz |
| Power Consumption | 6.7 mW at 135 ksps; 1.4 mW at 10 ksps |
| Power-Down Current | 1 µA (typ) after conversion |
| Digital Interface | Byte-wide parallel (8-bit + read-only high/low byte select) |
| Operating Temperature | 0 °C to +70 °C (commercial C grade) |
| Package | 20-pin TSSOP (MO-153AC) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
| Internal Clock | Factory-trimmed (no external crystal required) |
MAX1177CEUP+T Pin Configuration
| Pin 1 | AVDD — +5 V analog supply |
| Pin 2 | REF — 4.096 V reference output / external reference input |
| Pin 3 | AIN — Analog input |
| Pin 4 | GND — Analog ground |
| Pin 5 | DVDD — Digital supply (+2.7 V to +5.25 V) |
| Pin 6 | DGND — Digital ground |
| Pin 7 | /CONVST — Convert start input, active low |
| Pin 8 | /CS — Chip select, active low |
| Pin 9 | /RD — Read stro low, enables D0-D7 output |
| Pin 10 | HBEN — High byte enable (D8-D15 active when low) |
| Pin 11 | D7 — Data bit 7 (MSB when HBEN=1) / D15 when HBEN=0 |
| Pin 12 | D6 — Data bit 6 / D14 |
| Pin 13 | D5 — Data bit 5 / D13 |
| Pin 14 | D4 — Data bit 4 / D12 |
| Pin 15 | D3 — Data bit 3 / D11 |
| Pin 16 | D2 — Data bit 2 / D10 |
| Pin 17 | D1 — Data bit 1 / D9 |
| Pin 18 | D0 — Data bit 0 (LSB) / D8 |
| Pin 19 | EOC — End-of-conversion flag, active low |
| Pin 20 | PDL — Power-down logic-level input (tie high for auto power-down) |
Typical Applications
MAX1177CEUP+T is suitable for 6 applications: Industrial Process Control / 4-20 mA Loop Readback, Multi-Channel Data Acquisition Systems, Portable Instrumentation and Sensor Readouts, Precision Weigh Scales and Strain-Gauge Bridges, Medical Patient Monitoring Front-Ends, Automotive Sensor Interface Modules.
Industrial Process Control / 4-20 mA Loop Readback
The MAX1177CEUP+T fits industrial process-control modules because its ±10 V bipolar input range (set by external resistors) accepts the output of a precision 4-20 mA-to-voltage conversion resistor directly, and its 16-bit linearity resolves sub-milliampere changes in the loop current. The 135 ksps sample rate supports multiplexed multi-loop polling; automatic power-down between conversions reduces average dissipation in remote, battery-backed transmitters.
Recommended
Multi-Channel Data Acquisition Systems
The MAX1177CEUP+T suits multiplexed data-acquisition front-ends where its SAR architecture provides deterministic latency and zero pipeline delay, simplifying control-loop timing. The 84 dB SINAD at 10 kHz gives 14 ENOB, sufficient for vibration, weigh-scale, and strain-gauge measurements. A byte-wide parallel interface lets the ADC stream directly into an FPGA FIFO or microcontroller bus without glue logic, keeping BOM cost low.
Recommended
Portable Instrumentation and Sensor Readouts
The MAX1177CEUP+T is a strong fit for portable instrumentation because it dissipates only 1.4 mW at 10 ksps and drops to 1 µA in power-down between conversions, enabling months of battery life on a single 9 V cell in periodic-measurement duty cycles. The internal 4.096 V reference removes the need for an external reference IC, shrinking the BOM for hand-held multimeter-class products and field-portable sensor readers.
Recommended
Precision Weigh Scales and Strain-Gauge Bridges
The MAX1177CEUP+T supports ratiometric strain-gauge and load-cell measurements because its 4.096 V reference can be overdriven by an external reference tied directly to the bridge excitation rail, cancelling excitation drift over temperature. Its 16-bit no-missing-codes DC linearity and ±2 LSB INL guarantee weigh-scale accuracies better than 0.01 % of full scale when properly calibrated with a known load cell.
Recommended
Medical Patient Monitoring Front-Ends
The MAX1177CEUP+T fits medical patient-monitoring front-ends such as infusion pumps, infusion-rate sensors, and bedside vital-sign modules where 16-bit resolution and excellent DC linearity are required. The 5 V analog supply operates from a regulated USB or wall-adapter rail, while automatic power-down between conversions keeps average dissipation low in intermittently-sampled physiological channels like SpO2 and respiration waveforms.
Recommended
Automotive Sensor Interface Modules
The MAX1177CEUP+T can be used in non-safety automotive sensor-interface modules such as HVAC temperature-sensor clusters, seat-position readouts, and battery-pack cell monitors where 16-bit resolution and 5 V analog supply operation simplify interface to automotive 12 V rails. For safety-critical ASIL applications, designers should pair it with an AEC-Q100-qualified companion part rather than rely on the commercial-temperature MAX1177CEUP+T directly.
Recommended
Recommended Products Summary
Engineering reference data for MAX1177CEUP+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1177CCUP+T | MAX1147BEUP+T | MAX1156AEUP+T | MAX1154AEUE+T | MAX1177CEUP+ |
|---|---|---|---|---|---|---|
| Package | 20-pin TSSOP | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same | 20-pin TSSOP - same |
| 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 |
| Resolution | 16 bit | 16 bit | 12 bit | 12 bit | 12 bit | 16 bit |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Interface | Parallel byte-wide | Parallel byte-wide | Parallel byte-wide | Serial | Serial | Parallel byte-wide |
Key Differentiators
- True 16-bit no-missing-codes SAR in 20-pin TSSOP (vs MAX1147BEUP+T)
- ±10 V true-bipolar input capability with 5 V single supply (vs MAX1156AEUP+T)
- Byte-wide parallel interface simplifies MCU connectivity (vs MAX1154AEUE+T)
Design Notes
Tie AGND and DGND at a single star point directly under the IC exposed pad to prevent digital switching noise from coupling into the SAR comparator through the ground bounce. Place a 10 µF tantalum in parallel with a 0.1 µF ceramic within 5 mm of AVDD, and a 0.1 µF ceramic directly at the DVDD pin. Use a guarded analog-input trace surrounded by ground fill, and avoid running digital bus lines parallel to AIN within 3 mm.
Do not float the /CONVST or /CS pins; both must be driven actively by the controller, or the converter state machine may latch up at power-up. The REF pin must have at least a 0.1 µF bypass capacitor; if overdriven by an external reference, the external reference must have a bandwidth of at least 1 MHz and a settling time faster than 250 ns to keep the SAR acquisition accurate.
The MAX1177CEUP+T has a 250 ns acquisition time during which the input track-and-hold captures AIN. Ensure the input source can settle to 16-bit accuracy within this window, which generally requires an op-amp buffer with at least 1 MHz small-signal bandwidth and less than 50 µV of broadband noise. When using external resistors for ±10 V input scaling, use 0.1 % matched-pair resistors networks to preserve differential linearity.
Estimated: at 6.7 mW typical power dissipation in the 20-pin TSSOP (θJA ≈ 84 °C/W per typical package thermal data), the junction-temperature rise above ambient is roughly 0.56 °C. Even at the absolute maximum 5.25 V analog supply and 135 ksps continuous operation, the device remains well within the 0-70 °C commercial range and no heatsink is required.
Compliance Information
RoHS and lead-free confirmed across distributor listings. Commercial temperature grade only; choose a -40 °C to +85 °C variant or AEC-Q100 part for industrial / automotive use.
