MAX195BCWE+TG035 - 16-Bit 85ksps SAR ADC | Analog Devices
MPN: MAX195BCWE+TG035 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.5 | $23.50 |
| 10 | $21.85 | $218.50 |
| 100 | $19.2 | $1,920.00 |
| 500 | $17.1 | $8,550.00 |
| 1,000 | $14.95 | $14,950.00 |
MAX195BCWE+TG035 Overview
An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary-search algorithm through an internal DAC to determine each code bit, achieving high accuracy and low latency without the pipeline delay of higher-speed flash or pipeline architectures. SAR ADCs occupy a middle ground between slow integrating converters (such as dual-slope) and very fast flash converters, making them the industry standard for 12- to 18-bit precision instrumentation, data acquisition, and process-control front ends.
The MAX195BCWE+TG035 supports bipolar (±VREF) and unipolar (0 to VREF) input ranges selected per pin, accepts an external reference up to +5 V, and provides separate analog and digital supplies to minimize digital-noise coupling into the analog path. It achieves ±1 LSB integral non-linearity and ±1 LSB differential non-linearity, 90 dB SINAD and 87 dB THD, with a tri-state serial data output compatible with SPI/QSPI/MICROWIRE. Power-down current drops to 10 µA typical for battery-powered instrumentation.
The internal calibration corrects linearity and offset errors on demand, eliminating the need for external trimming potentiometers and supporting tighter board layouts. The device accepts input bandwidths up to 4.5 MHz through its track/hold amplifier, enabling accurate sampling of audio-bandwidth signals well beyond the Nyquist limit.
Typical applications include high-accuracy data-acquisition systems, instrumentation front ends, process control and industrial automation, weigh scales and panel meters, precision sensor signal conditioning, audio digitization, and medical instrumentation. Its 16-bit resolution makes it suitable for replacing older 14-bit and 12-bit SAR converters where headroom in dynamic range is required.
When laying out the board, keep the AGND and DGND returns short and join them at a single point near the IC, route the analog input traces over a continuous ground plane, and place 10 µF + 0.1 µF decoupling on both AVDD and DVDD pins within 5 mm of the package body to preserve the converter's 90 dB SINAD performance. The conversion start (CONV) and serial clock (SCLK) lines should be guarded against adjacent switching traces to avoid deterministic digital coupling.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on any single distributor listing, giving procurement and design engineers a one-stop reference for the MAX195BCWE+TG035.
Drop-in alternatives for MAX195BCWE+TG035 — 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 MAX195BCWE+TG035 (same form factor and footprint) — differing in Architecture, Mounting Type, Operating Temperature Range, Resolution, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX195BCWE+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX195BEWE+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX195BCWE-T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX195BEWE-T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX187CEWE+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX194BCPE
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MAX195BCWE+TG035 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sample Rate | 85 ksps |
| Architecture | Successive Approximation Register (SAR) |
| Input Channels | 1 single-ended |
| Input Range | 0 to VREF or ±VREF (pin-selectable) |
| Reference Voltage | Internal 4.096 V or external up to +5 V |
| Digital Interface | Serial (SPI/QSPI/MICROWIRE compatible) |
| Integral Non-Linearity (INL) | ±1 LSB (max) |
| Differential Non-Linearity (DNL) | ±1 LSB (max) |
| SINAD | 90 dB |
| Shutdown Current | 10 µA (typical) |
| Input Bandwidth (Track/Hold) | 4.5 MHz |
| Package | 16-pin WSOIC (wide-body SOIC) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | 0°C to +70°C (C grade) |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
MAX195BCWE+TG035 Pin Configuration
| Pin 1 | AVDD — Analog supply voltage (+5 V typical) |
| Pin 2 | AIN — Analog input (single-ended) |
| Pin 3 | REF — Reference voltage input/output |
| Pin 4 | REFEN — Reference enable (selects internal/external reference) |
| Pin 5 | AGND — Analog ground return |
| Pin 6 | DGND — Digital ground return |
| Pin 7 | DVDD — Digital supply voltage |
| Pin 8 | DOUT — Serial data output (tri-state) |
| Pin 9 | SCLK — Serial clock input |
| Pin 10 | CS — Chip select (active low) |
| Pin 11 | CONV — Conversion start (active low) |
| Pin 12 | BP/UP — Bipolar/Unipolar input range select |
| Pin 13 | CAL — Calibration start input |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | AGND — Analog ground return (second pin) |
Typical Applications
MAX195BCWE+TG035 is suitable for 6 applications: Industrial Weigh Scales and Panel Meters, Process Control and Automation, Medical Instrumentation and Patient Monitoring, Precision Data-Acquisition Systems, Audio Bandwidth Signal Digitization, Sensor Signal Conditioning Modules.
Industrial Weigh Scales and Panel Meters
The MAX195BCWE+TG035 is well matched to industrial weigh-scale and panel-meter front ends because its 16-bit resolution and ±1 LSB INL deliver the dynamic range required to resolve microvolt changes from a load-cell bridge while the 85 ksps throughput supports rapid settling for batch weighing. The internal 4.096 V reference simplifies the bill of materials, the 10 µA shutdown mode extends battery life between weighing cycles, and the pin-selectable bipolar ±VREF input range lets one design accept both single-ended sensor signals and true-differential bridge outputs. Place the chip near the analog input with 10 µF + 0.1 µF decoupling and a continuous ground plane to preserve the 90 dB SINAD, then route the SPI serial output away from AC mains to keep digital common-mode noise out of the conversion result.
Recommended
Process Control and Automation
Process-control loops benefit from the MAX195BCWE+TG035's combination of 16-bit absolute accuracy, low-latency single-shot conversion, and an SPI-compatible host interface that integrates with standard PLC and PAC backplanes. The separate AVDD/DVDD supplies let the analog front-end sit on a clean 5 V analog rail while the digital logic communicates with a noisy 3.3 V or 5 V MCU, minimizing digital-noise coupling into the conversion result. The bipolar ±VREF input range accepts ±10 V or ±5 V transducer signals after external scaling, and the track/hold amplifier handles up to 4.5 MHz input bandwidth — well above typical transducer slew rates. For thermocouple and RTD front ends, pair the converter with an external precision reference such as the MAX6126 to hold absolute temperature accuracy across the industrial temperature range.
Recommended
Medical Instrumentation and Patient Monitoring
Patient-monitoring and diagnostic-equipment designers choose the MAX195BCWE+TG035 for its 16-bit resolution, 90 dB SINAD, and 10 µA shutdown that keeps quiescent current low during standby modes. The wide input bandwidth of the track/hold stage captures ECG, EEG, and pulse-oximeter signals up to the audio band without distortion, and the SAR architecture's zero-latency single-shot conversion is critical when the host must respond to the next sample within microseconds rather than wait for a pipeline to flush. Use the unipolar 0 to VREF input configuration when the front end has already DC-shifted the signal into the 0–4.096 V common-mode range, and pair the chip with a low-noise instrumentation amplifier such as the MAX4475 to preserve the converter's dynamic range. The +TG035 tape-and-reel packaging simplifies high-volume SMT assembly for medical-device production lines.
Recommended
Precision Data-Acquisition Systems
The MAX195BCWE+TG035 is a strong choice for multi-channel data-acquisition systems where 16-bit absolute accuracy and 85 ksps throughput per channel are required. Its single-channel SAR architecture simplifies synchronization with external multiplexers because each conversion is started independently by a CONV pulse, and the serial SPI output allows multiple chips to share a single bus with separate chip-select lines. The internal calibration circuitry corrects linearity and offset on demand, eliminating drift between calibration cycles and supporting tighter measurement uncertainty budgets. When system designers need more than one channel, stack multiple MAX195BCWE+TG035s and synchronize their CONV inputs to sample all channels within the same aperture window — a typical configuration for vibration analysis and acoustic beamforming front ends.
Recommended
Audio Bandwidth Signal Digitization
Audio-bandwidth digitization is well served by the MAX195BCWE+TG035's 4.5 MHz track/hold input bandwidth and 90 dB SINAD, which comfortably exceed the 20 kHz audio band and headroom requirements for professional and prosumer audio applications. The internal 4.096 V reference sets the converter's full-scale range to roughly 8.2 Vpp differential when using the bipolar ±VREF input configuration, which is enough dynamic range for line-level audio captures. While the SAR architecture does not match the higher sample rates of audio-specific delta-sigma codecs, its zero-latency conversion is valuable for monitoring applications that must read a single sample on demand without waiting for filter settling. Designers building such systems should pair the converter with an anti-aliasing filter whose corner is below the 42.5 kHz Nyquist frequency for 85 ksps operation.
Recommended
Sensor Signal Conditioning Modules
Sensor-signal-conditioning modules benefit from the MAX195BCWE+TG035's programmable bipolar and unipolar input ranges, internal 4.096 V reference, and 10 µA shutdown that lets battery-powered sensor nodes sleep between measurements. The ADC accepts analog outputs from strain-gauge bridges, thermocouples, RTDs, and pressure transducers after appropriate amplification, and its 16-bit resolution captures small fractional changes in the sensor output that would be lost on a 12-bit converter. The MAX195BCWE+TG035's separate AVDD/DVDD pins let the analog section ride on a regulated 5 V supply while the digital section talks to a 3.3 V MCU, simplifying mixed-voltage designs. When the module must operate across the full industrial temperature range, substitute the E-grade drop-in MAX195BEWE+ without changing the PCB layout, picking up 85 °C operation at no incremental design cost.
Recommended
Recommended Products Summary
Engineering reference data for MAX195BCWE+TG035 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX195BCWE+ | MAX195BEWE+ | MAX195BCWE-T | MAX187CEWE+ | MAX194BCPE |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | WSOIC-16 | WSOIC-16 — same | WSOIC-16 — same | WSOIC-16 — same | WSOIC-16 — same | WSOIC-16 — same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit | 14 bit |
| Sample Rate | 85 ksps | 85 ksps | 85 ksps | 85 ksps | 75 ksps | 85 ksps |
| Input Range | 0 to VREF or ±VREF (pin-selectable) | 0 to VREF or ±VREF | 0 to VREF or ±VREF | 0 to VREF or ±VREF | 0 to VREF or ±VREF | 0 to VREF or ±VREF |
| Operating Temperature | 0 °C to +70 °C (C grade) | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Packaging Variant | Tape & Reel (TG035, 7-inch reel) | Cut Tape (no reel suffix) | Cut Tape (no reel suffix) | Tape & Reel (standard -T) | Cut Tape | Cut Tape |
Key Differentiators
- Calibration-friendly tape-and-reel format for SMT production (vs MAX195BCWE+)
- 16-bit absolute accuracy with internal calibration (vs MAX187CEWE+)
- Industrial-temperature drop-in compatibility within the same family (vs MAX195BEWE+)
- Higher sample rate than older 12-bit ADCs in the same footprint (vs MAX194BCPE)
Design Notes
Separate the AVDD and DVDD supplies with a ferrite bead or a small RC filter, and place 10 µF bulk + 0.1 µF ceramic decoupling within 5 mm of each supply pin. The internal 4.096 V reference draws current from AVDD; if the analog rail sags during conversions the conversion result will drift. Estimated: at 85 ksps the analog supply current is roughly 1–2 mA peak, so the decoupling network must source that pulse without collapsing the rail — a 10 µF X7R ceramic across AVDD is the minimum recommendation per the Analog Devices evaluation kit.
Keep the analog input trace short and over a continuous ground plane on the top layer, and avoid routing the SPI output traces (DOUT, SCLK, CS) parallel to analog traces for any length. The CONV and SCLK edges can couple directly into AIN through the package substrate if traces run parallel for more than about 5 mm. Estimated: based on a typical 16-pin WSOIC body, the recommended keep-out is 3× the trace-to-trace spacing between analog and digital sections; crossing at 90° is acceptable if necessary.
Do not connect AGND and DGND at multiple points. According to the MAX195 datasheet, joining them at the power-supply entry point is acceptable, but joining them at the IC body creates ground loops that inject digital-noise coupling into AIN through the substrate. Use a single-point star ground at the IC and keep the AGND return path short and wide. Estimated: the difference between a star ground and a split ground can shift the apparent 90 dB SINAD result downward by 6–10 dB in laboratory measurements.
Use the internal calibration routine (asserted via CAL pin) after power-up and after any significant temperature shift greater than about 10 °C to correct offset and linearity drift. According to the datasheet, the calibration routine takes roughly 100 ms and stores correction coefficients in internal registers that are reapplied to every subsequent conversion, which is why the 90 dB SINAD is maintained across the full 0–70 °C temperature range for the C grade.
Compliance Information
RoHS compliant per Analog Devices product page; lead-free matte-tin plating; MSL 1 (unlimited floor life). Not AEC-Q100 qualified — choose a qualified part for automotive deployments.
