MAX1179AEUI+ - 16-Bit 135ksps Bipolar SAR ADC | Analog Devices
N.º da peça: MAX1179AEUI+ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $12.95 | $12,95 |
| 10 | $11.66 | $116,60 |
| 100 | $10.36 | $1.036,00 |
| 500 | $9.32 | $4.660,00 |
| 1.000 | $8.29 | $8.290,00 |
MAX1179AEUI+ Visão geral
A SAR (Successive Approximation Register) ADC is a precision data converter that performs a binary-search conversion on an internal capacitive DAC, producing a digital code that converges to the input voltage in N clock cycles for an N-bit converter. Within the broader product hierarchy, the MAX1179 sits as a precision ADC -> data converter -> signal chain IC -> mixed-signal semiconductor, and is differentiated from sigma-delta and pipeline ADCs by its single-shot latency (one conversion per trigger, no pipeline delay) and intrinsic ease of single-supply bipolar operation.
Key features of the MAX1179AEUI+ include an internal 4.096V reference, an external reference option, a single-ended analog input, a parallel (16-bit wide) digital interface, and a hardware-/software-configurable input range. The device supports both unipolar (0 to +5V) and bipolar (-5V to +5V) input spans, with a single +4.2V analog supply and a +2.7V to +5.25V digital supply. A separate 50MHz conversion clock or external crystal is not required; the on-chip oscillator drives the SAR state machine. The TSSOP-28 package provides a small footprint suitable for high-density data-acquisition boards.
The MAX1179 architecture uses a charge-redistribution capacitive DAC followed by a low-noise comparator and SAR logic. By accepting ±5V true bipolar inputs on a single 4.2V analog supply, the part eliminates the need for external level-shift or negative-rail circuitry that would otherwise be required to digitize AC sensor outputs, thermocouple or strain-gauge bridge signals, or industrial ±10V (after resistor divider) transducer outputs.
Typical applications include industrial data-acquisition front-ends, PLC analog input modules, multi-channel instrumentation panels, weigh scales and load-cell digitizers, and motor-control feedback loops where a high-accuracy 16-bit conversion with simultaneous sampling of a bipolar transducer is required.
When designing with this device, decouple AVDD and DVDD with 0.1µF and 10µF ceramic capacitors placed within 2mm of each supply pin, and route analog and digital grounds to a single-point star ground under the exposed pad to prevent digital return currents from corrupting the input signal. The reference bypass capacitor is critical: 4.7µF minimum directly on REF.
This page synthesizes distributor pricing, drop-in alternatives from the MAX1179 family, and practical design notes not collated in the manufacturer datasheet, helping engineers shorten the selection-to-prototype cycle for 16-bit bipolar ADC designs.
Alternativas drop-in para MAX1179AEUI+ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MAX1179AEUI+ (mesmo formato e footprint) — diferindo em Package, Input Type, Operating Temperature, Resolution, Data Interface.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MAX1179BEUI+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX1179ACUI+
✅ Drop-In✓ Em estoque
$10.95 / unidade
Ver ficha técnica →MAX1179AEUI+T
✅ Drop-In✓ Em estoque
$10.65 / unidade
Ver ficha técnica →MAX1187AEUI+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX1189AEUI+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX1179AEUI+ Classificações máximas e características elétricas
| Resolução | 16 bit |
| Sample Rate | 135 kSPS |
| Architecture | SAR (Successive Approximation) |
| Number of Channels | 1 |
| Input Type | Single-Ended, Bipolar |
| Analog Input Range (Bipolar) | -5 V to +5 V |
| Analog Input Range (Unipolar) | 0 V to +5 V |
| Analog Supply Voltage (AVDD) | 4.2 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 5.25 V |
| Reference | Internal 4.096 V or External |
| Data Interface | Parallel (16-bit) |
| Temperatura de operação | 0 °C to +70 °C (Commercial) |
| Encapsulamento | TSSOP-28 (4.40 mm) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Configuração de pinos do MAX1179AEUI+
| Pino 1 | AGND — Analog ground |
| Pino 2 | AIN — Analog input |
| Pino 3 | REF — Reference voltage input/output (internal 4.096V) |
| Pino 4 | AVDD — Analog supply (+4.2V) |
| Pino 5 | DVDD — Digital supply (+2.7V to +5.25V) |
| Pino 6 | DGND — Digital ground |
| Pino 7 | CS — Chip select (active low) |
| Pino 8 | RD — Read strobe (active low) |
| Pino 9 | WR — Write strobe (active low) |
| Pino 10 | CONVST — Conversion start |
| Pino 11 | CLK — External clock input (optional) |
| Pino 12 | D0 — Data bit 0 (LSB) |
| Pino 13 | D1 — Data bit 1 |
| Pino 14 | D2 — Data bit 2 |
| Pino 15 | D3 — Data bit 3 |
| Pino 16 | D4 — Data bit 4 |
| Pino 17 | D5 — Data bit 5 |
| Pino 18 | D6 — Data bit 6 |
| Pino 19 | D7 — Data bit 7 |
| Pino 20 | D8 — Data bit 8 |
| Pino 21 | D9 — Data bit 9 |
| Pino 22 | D10 — Data bit 10 |
| Pino 23 | D11 — Data bit 11 |
| Pino 24 | D12 — Data bit 12 |
| Pino 25 | D13 — Data bit 13 |
| Pino 26 | D14 — Data bit 14 |
| Pino 27 | D15 — Data bit 15 (MSB) |
| Pino 28 | NC — Not connected (per datasheet) |
Aplicações típicas
MAX1179AEUI+ é adequado para 6 aplicaçãos: Industrial Data Acquisition Front-End, PLC Analog Input Module, Weigh Scale and Load Cell Digitizer, Motor Control Current Sense Feedback, Medical Patient Monitoring (Non-Critical), Test and Measurement Instrumentation.
Industrial Data Acquisition Front-End
The MAX1179AEUI+ is well matched to industrial data-acquisition front-ends that must digitize ±5V bipolar sensor signals on a single 4.2V analog supply. Its 16-bit resolution provides 76µV LSB at the ±5V span, and the 135 kSPS sample rate captures multi-kHz process-control signals with full Nyquist headroom. Unlike sigma-delta ADCs, the SAR architecture delivers a fresh conversion every CONVST edge with no pipeline delay, so the part fits closed-loop control loops where deterministic single-shot latency is required. Place AVDD bypass 0.1µF + 10µF ceramic within 2mm of the pin, and tie AGND/DGND to a star ground under the exposed pad.
Recomendado
PLC Analog Input Module
PLC analog input modules that accept ±10V (resistor-divided to ±5V) or 4-20mA (shunt-resistor-derived) transducer outputs benefit from the MAX1179AEUI+'s bipolar input range on a single 4.2V supply. The internal 4.096V reference eliminates a separate reference IC on the BOM, reducing module cost. The parallel 16-bit digital interface reads D0-D15 in a single RD strobe, simplifying the FPGA or microcontroller glue logic. Commercial 0-70 °C operation matches most indoor cabinet environments, and the 28-pin TSSOP delivers a compact footprint for 8-channel or 16-channel PLC backplanes.
Recomendado
Weigh Scale and Load Cell Digitizer
Weigh scale and load cell digitizers need 16-bit (or better) resolution to resolve sub-gram weight changes from a strain-gauge bridge. The MAX1179AEUI+'s 16-bit SAR architecture, internal 4.096V reference, and ±5V bipolar input are well suited for the bridge output after instrumentation-amp conditioning. The 135 kSPS sample rate oversamples the 10Hz-1kHz mechanical bandwidth by orders of magnitude, enabling digital averaging for noise reduction. The TSSOP-28 package fits inside a sealed load-cell housing PCB. The 16-bit ENOB is sufficient for legal-for-trade scales when paired with ratiometric bridge excitation and temperature compensation.
Recomendado
Motor Control Current Sense Feedback
Three-phase motor control feedback loops digitize phase-current shunt-resistor voltages that swing both positive and negative around 0V. The MAX1179AEUI+'s ±5V bipolar input accepts the AC current waveform directly without an external negative rail, and the 135 kSPS sample rate exceeds the typical 8-20 kHz PWM current-loop bandwidth with 5-10x oversampling. The SAR architecture's single-cycle conversion latency ensures the controller receives a fresh current value every PWM cycle. Per the datasheet, AVDD decoupling must be low-ESR ceramic to keep digital switching noise out of the analog input path.
Recomendado
Medical Patient Monitoring (Non-Critical)
Non-critical medical patient monitoring (e.g. temperature, body-weight, posture sensors) can use the MAX1179AEUI+ for its 16-bit resolution on bipolar sensor outputs. The 0-70 °C commercial operating range covers indoor clinical environments, and the parallel 16-bit interface integrates with most ARM Cortex-M microcontrollers. The MAX1179 is not AEC-Q100 qualified, so it is NOT a substitute for automotive or life-support medical designs; pair it with appropriate isolation and IEC 60601 patient-leakage protection circuitry. The internal 4.096V reference simplifies the analog front-end BOM.
Recomendado
Test and Measurement Instrumentation
Benchtop and ATE test-and-measurement instruments that digitize ±5V transducer outputs (force gauges, pressure transducers, position encoders with bipolar output) can use the MAX1179AEUI+ for its combination of 16-bit resolution, 135 kSPS sample rate, and bipolar input on a single 4.2V supply. The internal reference is adequate for non-ratiometric measurements; for ratiometric bridge applications, an external reference tracks the excitation supply. The 28-pin TSSOP package allows the ADC to be placed near the analog input connector to minimize trace-induced noise. The parallel 16-bit interface simplifies FPGA-based data capture for automated test programs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX1179AEUI+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MAX1179BEUI+ | MAX1179ACUI+ | MAX1187AEUI+ | MAX1189AEUI+ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSSOP-28 | TSSOP-28 | TSSOP-28 | TSSOP-28 | TSSOP-28 |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Sample Rate | 135 kSPS | 135 kSPS | 135 kSPS | 135 kSPS | 135 kSPS |
| Input Range (Bipolar) | -5 V to +5 V | -5 V to +5 V | -5 V to +5 V | -5 V to +5 V | -5 V to +5 V |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Channels | 1 | 1 | 1 | Multi-channel | Multi-channel |
Principais diferenciais
- True ±5V bipolar input on a single 4.2V supply (vs MAX1179BEUI+)
- Internal 4.096V reference eliminates external reference BOM (vs MAX1179ACUI+)
- Single-channel precision vs multi-channel density (vs MAX1187AEUI+ / MAX1189AEUI+)
Notas de projeto
AVDD (4.2V analog supply) and DVDD (2.7-5.25V digital supply) must be decoupled with a 0.1µF ceramic capacitor placed within 2mm of each supply pin, in parallel with a 10µF low-ESR bulk capacitor. A ferrite bead between AVDD and the upstream 4.2V LDO output prevents digital switching noise from coupling into the analog reference. The reference pin (REF) requires a 4.7µF minimum low-ESR ceramic bypass capacitor placed directly on the REF pin to maintain 16-bit noise performance; the MAX1179 datasheet warns that insufficient reference bypassing can degrade SNR by 3-5 dB.
Route analog and digital grounds on separate planes that meet only at a single-point star ground placed under the exposed pad of the TSSOP-28. The AGND pin and DGND pin should connect to their respective planes with short, wide traces. Keep the analog input trace away from the parallel digital bus (D0-D15) and clock traces to avoid digital-to-analog crosstalk. Per the MAX1179/MAX1187/MAX1189 datasheet, the analog input should be treated as a high-impedance node guarded by a driven shield trace or a ground fill to minimise leakage-induced offset errors.
Do not exceed the absolute maximum AVDD of 4.2V; the MAX1179AEUI+ uses a single 4.2V analog supply to accept ±5V bipolar inputs via internal level-shift circuitry, and a higher AVDD will damage the part. The bipolar ±5V input range assumes the input signal is referenced to AGND, not to a 2.5V mid-rail. For unipolar 0-5V operation, configure the input accordingly per the datasheet. The CONVST pin should be debounced or driven from a clean digital source; a noisy CONVST will introduce conversion jitter and degrade ENOB by 1-2 bits at 135 kSPS.
Informações de conformidade
RoHS compliant and lead-free per Maxim Integrated product page. Not AEC-Q100 qualified; for automotive applications evaluate the MAX1179 family variants with AEC-Q100 screening. Halogen-free status not explicitly confirmed in verified data.
