LTC1650AIN#PBF - 16-Bit Low-Glitch Voltage Output DAC | ADI
N.º de pieza: LTC1650AIN#PBF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.05 | $130,50 |
| 100 | $11.62 | $1.162,00 |
| 500 | $10.45 | $5.225,00 |
| 1.000 | $9.4 | $9.400,00 |
LTC1650AIN#PBF Descripción general
A digital-to-analog converter (DAC) is a data-conversion integrated circuit that translates a digital code word into a precisely scaled analog voltage or current. Within the broader data-converter family (ADC and DAC), this part belongs to the precision narrow-DC voltage-output DAC category, sitting under the hierarchy: DAC -> data converter -> mixed-signal IC -> semiconductor. The LTC1650AIN#PBF specifically targets low-glitch, low-noise, buffered voltage-output applications where a clean step transition and rail-to-rail swing are critical.
Key differentiating specifications include 2 nV-s glitch impulse, 30 nV/sqrt(Hz) noise spectral density, 16-bit guaranteed monotonicity, and a true rail-to-rail output buffer that swings to within millivolts of either supply rail. The cascadable three-wire serial interface allows multiple LTC1650 devices to share a single SPI bus by daisy-chaining the DOUT pin into the next device's DIN pin, simplifying multi-axis or multi-channel designs.
Architecturally, the device combines a thin-film R-2R ladder network for INL/DNL linearity with an on-chip output op-amp capable of driving 2 kohm/100 pF loads. The internal reference inputs (REFHI/REFLO) decouple the output range from the supply rails, enabling asymmetric spans such as 0 to 4.096 V for unipolar or plus/minus 4.096 V for bipolar operation.
Typical applications include industrial process control calibration, automated test equipment (ATE) waveform generation, digitally controlled offset and gain trimming, programmable voltage references, and motor-control setpoint generation. The wide output swing and low glitch make the LTC1650AIN#PBF a strong fit where each code transition must not couple into downstream signal-chain stages.
When designing with this part, place 0.1 uF decoupling capacitors close to AVDD, DVDD, and AVSS pins and route REFHI/REFLO traces as a differential pair. Keep the analog ground (AGND) and digital ground (DGND) joined at a single star point beneath the IC to preserve the 16-bit linearity.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB-level design guidance not found in the manufacturer datasheet alone, giving engineers a single reference for evaluation and sourcing.
Alternativas directas para LTC1650AIN#PBF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC1650IN#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC1650ACS#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC1650IS#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC1650AIN#PBF Valores máximos y características eléctricas
| Resolución | 16 bits |
| Number of Channels | 1 |
| Architecture | R-2R Ladder with Output Buffer |
| Tipo de salida | Voltage, Buffered, Rail-to-Rail |
| Interfaz | 3-Wire Serial (SPI/MICROWIRE-compatible, Cascadable) |
| Supply Voltage - Analog (AVDD/AVSS) | +/-5 V (dual, +/-4.75 V to +/-5.25 V) |
| Supply Voltage - Digital (DVDD) | +5 V (4.75 V to 5.25 V) |
| Glitch Impulse | 2 nV-s |
| Output Noise Spectral Density | 30 nV/sqrt(Hz) |
| Monotonicity | 16-bit guaranteed over temperature |
| Reference Inputs | REFHI, REFLO (unipolar or bipolar span) |
| Power Dissipation | 50 mW (typical at +/-5 V) |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Encapsulado / Carcasa | 16-DIP (0.300 in / 7.62 mm) |
| Tipo de montaje | Through-Hole |
| Packaging | Tube |
| Estado RoHS | Compliant (Pb-free #PBF suffix) |
| Lead-Free | Yes |
Configuración de pines de LTC1650AIN#PBF
| Pin 1 | VOUT — Buffered analog voltage output |
| Pin 2 | AVSS — Negative analog supply (-5 V) |
| Pin 3 | AVDD — Positive analog supply (+5 V) |
| Pin 4 | REFLO — Reference low input (sets output low end) |
| Pin 5 | REFHI — Reference high input (sets output high end) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | DGND — Digital ground |
| Pin 8 | CLR — Asynchronous clear input (active low) |
| Pin 9 | CS — Chip select (active low) |
| Pin 10 | SCK — Serial clock input |
| Pin 11 | DIN — Serial data input |
| Pin 12 | DOUT — Serial data output (for daisy-chain) |
| Pin 13 | DVDD — Positive digital supply (+5 V) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | AGND — Analog ground |
Aplicaciones típicas
LTC1650AIN#PBF es adecuado para 6 aplicacións: Industrial Process Control Calibration, Automated Test Equipment (ATE) Waveform Generation, Digitally Controlled Offset and Gain Trimming, Programmable Voltage and Current References, Motor Control Setpoint Generation, Audio Attenuation and Gain Control.
Industrial Process Control Calibration
The LTC1650AIN#PBF fits industrial process control calibration because its 16-bit monotonic voltage output delivers one part in 65,536 resolution for setting precise calibration currents and voltages in 4-20 mA loops. The 2 nV-s glitch impulse prevents transient code-switching artifacts from perturbing the controlled process variable, while the dual plus/minus 5 V supply rail matches legacy industrial backplane voltages without requiring additional DC-DC conversion. Place the DAC between the controller SPI bus and the sensor excitation circuit; performance trade-off is the 50 mW dissipation versus newer nano-power DACs, but for fixed-rack instrumentation the thermal load is acceptable.
Recomendado
Automated Test Equipment (ATE) Waveform Generation
The LTC1650AIN#PBF is well suited to ATE waveform generation where each DAC code step must be electrically clean to avoid corrupting the device under test measurement. The 2 nV-s glitch impulse is one of the lowest in its class, ensuring that major-carry transitions (for example 7FFFh to 8000h) do not inject transient charge into sensitive comparators. The cascadable three-wire serial interface lets the ATE designer chain multiple LTC1650 devices to drive multiple DUT pins from a single test-head controller, and the 16-pin PDIP through-hole package simplifies test-fixture rework.
Recomendado
Digitally Controlled Offset and Gain Trimming
For precision instrumentation, the LTC1650AIN#PBF can serve as a digital trim DAC that adjusts the offset and gain of an analog front-end at production calibration. The 16-bit resolution gives 65,536 trim steps over a typical plus/minus 4.096 V span, equivalent to about 125 uV per LSB, more than enough to null op-amp offset voltages below 10 uV. The rail-to-rail output swing and 30 nV/sqrt(Hz) noise density ensure the trim adjustment does not introduce audible or measurable noise into the signal chain. The 16-pin PDIP package is convenient for through-hole trim boards used at calibration stations.
Recomendado
Programmable Voltage and Current References
The LTC1650AIN#PBF can be configured as a programmable voltage reference by tying the REFLO/REFHI inputs to a precision external reference and using the buffered voltage output to drive the rest of the system. With the integrated output buffer driving 2 kohm/100 pF loads directly, no external op-amp is needed for many reference applications. The 50 mW power dissipation and dual plus/minus 5 V supply simplify thermal management in rack-mounted instruments. Performance trade-off: against a fixed precision reference IC, the DAC reference has more drift over temperature, but the digital programmability adds calibration flexibility.
Recomendado
Motor Control Setpoint Generation
The LTC1650AIN#PBF can generate precise analog setpoints for closed-loop motor speed or position controllers. Its 16-bit resolution provides sub-RPM accuracy on speed references and the low-glitch 2 nV-s impulse prevents torque transients during setpoint changes. The dual plus/minus 5 V supply rail is standard in industrial motor drives, eliminating the need for additional power conditioning. The 16-pin PDIP package is convenient for legacy stepper and DC servo drive retrofits that still use through-hole control boards.
Recomendado
Audio Attenuation and Gain Control
For high-end audio mixing consoles and digitally controlled attenuators, the LTC1650AIN#PBF can serve as a precision gain-control element. The 16-bit resolution gives 0.0015 dB per LSB step, exceeding the 0.01 dB resolution typically required for professional audio. The 30 nV/sqrt(Hz) noise density and low 2 nV-s glitch ensure quiet operation without zipper noise during gain changes. The trade-off is that the DAC's settling time is not optimized for audio-rate updates, so it suits static gain settings rather than continuous waveform generation.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC1650AIN#PBF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC1650IN#PBF | LTC1650ACS#PBF | LTC1650IS#PBF |
|---|---|---|---|---|
| Package | 16-PDIP (0.300 inch) | 16-PDIP (0.300 inch) - same | 16-SOIC N | 16-SOIC N |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Linearity Grade | A-grade (tightened) | Standard grade | A-grade (tightened) | Standard grade |
| Output Type | Voltage, Buffered, Rail-to-Rail | Voltage, Buffered, Rail-to-Rail | Voltage, Buffered, Rail-to-Rail | Voltage, Buffered, Rail-to-Rail |
| Supply Voltage | +/-5 V dual | +/-5 V dual | +/-5 V dual | +/-5 V dual |
| Glitch Impulse | 2 nV-s | 2 nV-s | 2 nV-s | 2 nV-s |
| Interface | 3-Wire SPI Cascadable | 3-Wire SPI Cascadable | 3-Wire SPI Cascadable | 3-Wire SPI Cascadable |
| Operating Temperature | -40C to +85C | -40C to +85C | 0C to +70C | -40C to +85C |
| Approx. Unit Price @ qty 1 | USD 14.50 | USD ~10.50 | USD ~14.50 | USD ~13.00 |
Diferenciadores clave
- Tightened A-grade linearity in 16-pin PDIP (frente a LTC1650IN#PBF)
- Through-hole PDIP for legacy industrial backplanes (frente a LTC1650ACS#PBF)
- Industrial -40C to +85C operating range (frente a LTC1650ACS#PBF)
Notas de diseño
Place 0.1 uF ceramic decoupling capacitors as close as possible to each supply pin: AVDD, AVSS, and DVDD. For the dual plus/minus 5 V analog supplies, add a 10 uF tantalum or ceramic bypass near the IC to suppress switching transients from upstream DC-DC converters. Power dissipation is typically 50 mW at +/-5 V, so the IC does not require a heatsink but does benefit from a small copper pour on AVDD/AVSS to keep thermal gradients away from the reference inputs.
Use a star-ground topology joining AGND and DGND at a single point directly beneath the LTC1650AIN#PBF package (pin 7 and pin 16 tie together at the IC). Route REFHI and REFLO as a tightly-coupled differential pair with ground guarding to preserve 16-bit linearity. Keep digital SPI traces (CS, SCK, DIN, DOUT) away from VOUT and the reference traces by at least 3x the trace-to-trace spacing to minimize digital-to-analog coupling.
Do not leave REFHI or REFLO floating - both must be driven to a defined DC voltage within the supply rails. A floating REFLO will cause the output buffer to operate in an undefined region and may exceed the absolute maximum ratings. For unipolar 0 to 4.096 V operation, tie REFLO to AGND and REFHI to a clean 4.096 V reference. Also, ensure the CLR pin is tied high (DVDD) through a 10 kohm resistor if asynchronous clear is not used, otherwise the DAC will hold at zero scale after power-up.
Información de cumplimiento
Pb-free #PBF suffix indicates RoHS-compliant lead finish. Industrial -40C to +85C temperature grade only; AEC-Q100 automotive and MIL-PRF grades not offered in the PDIP package. Halogen-free status not explicitly stated on datasheet and is set to unknown.
