TLV0838IN - 8-Bit 37.9 kSPS Serial ADC | Texas Instruments
N.º de pieza: TLV0838IN ✓ ActivoTLV0838IN Descripción general
An ADC is a data-acquisition IC that converts an analog voltage into a digital code for processing, measurement, or control. The TLV0838 belongs to the successive-approximation ADC family, within the broader ADC/DAC and signal-conversion semiconductor hierarchy. Compared with a flash converter, its internal conversion architecture supports lower cost and lower power, while its serial output reduces the number of signals required to connect it to a controller.
The primary specifications are 8-bit resolution, a maximum sampling rate of 37.9 kSPS, and operation from a 3 V supply. Available input configurations include 4, 7, or 8 channels according to the manufacturer ordering information. Serial control provides a compact interface for embedded systems, and the analog input range extends from VSS to VCC. These features make the converter useful where a small, low-cost, low-power measurement channel is needed.
The converter uses a successive-approximation conversion process and supports either ratiometric referencing or a VCC-based reference. In ratiometric operation, the digital result changes in proportion to supply variation, which can compensate for excitation and reference drift when the sensor and converter share the same supply. Using VCC as the reference simplifies standalone circuits, although absolute accuracy then depends on the supply voltage and its tolerance. The serial interface is designed for compatibility with TTL and MOS input and output levels.
Typical applications include low-speed sensor acquisition, industrial control inputs, consumer measurement modules, battery-powered instrumentation, and microcontroller-based monitoring. The 37.9 kSPS conversion rate supports continuous monitoring of slowly changing analog quantities, while the ratiometric mode is particularly relevant to resistive sensors using divider-based excitation. The serial interface also helps conserve connector pins and PCB area compared with a parallel ADC.
Designers should verify the selected TLV0838 configuration's channel count, reference method, control timing, and absolute input limits against the manufacturer datasheet. The 20-pin PDIP package is suitable for through-hole prototype and legacy industrial assemblies but requires more PCB area than a modern surface-mount ADC. Input-source impedance, acquisition time, sampling clock timing, and reference stability must be considered when establishing conversion accuracy.
This page consolidates verified manufacturer and distributor information, explicitly marks unavailable electrical details, and distinguishes the verified TLV0838IP family alternative from unsupported cross-package or unverified substitutes. It also provides application guidance and design checks that are not normally presented together on a distributor catalog page.
Alternativas directas para TLV0838IN — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
TLV0838IP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TLV0838IN Valores máximos y características eléctricas
| ADC Resolution | 8 bit |
| Frecuencia de muestreo | 37.9 kSPS |
| Architecture | Successive-approximation (SAR) |
| Tensión de alimentación | 3 V |
| Input Channel Options | 4, 7, or 8 channels |
| Analog Input Range | VSS to VCC |
| Reference Mode | Ratiometric or VCC reference |
| Output Interface | Serial |
| Input Interface Compatibility | TTL/MOS compatible |
| Output Interface Compatibility | TTL/MOS compatible |
| Encapsulado | 20-pin PDIP |
| Tipo de montaje | Through-hole |
Guía de configuración de pines de TLV0838IN 20-pin pdip
Configuración de pines para TLV0838IN (encapsulado 20-pin pdip). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para TLV0838IN.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TLV0838IN es adecuado para 6 aplicacións: Resistive Sensor Acquisition, Industrial Control Inputs, Battery-Powered Instrumentation, Consumer Measurement Modules, Microcontroller Sensor Interfaces, Legacy Through-Hole Data Acquisition.
Resistive Sensor Acquisition
The TLV0838IN suits resistive sensors whose divider output varies slowly enough for an 8-bit, 37.9 kSPS converter. Its VSS-to-VCC input range permits sensing a fraction of the 3 V supply, while ratiometric operation can compensate for supply drift when the sensor divider and converter use the same excitation. The serial interface minimizes signal count, although source impedance and acquisition timing must be checked against the manufacturer specifications.
Industrial Control Inputs
The TLV0838IN can provide compact analog monitoring for industrial control boards that must measure several slowly changing process signals. According to the manufacturer ordering information, the family includes 4-, 7-, and 8-channel configurations, allowing design selection according to channel count. Its 3 V operation and TTL/MOS-compatible interface are useful for low-voltage embedded controllers, while the 20-pin PDIP format favors legacy or through-hole industrial assemblies.
Battery-Powered Instrumentation
The TLV0838IN is applicable to battery-powered metering equipment requiring low-speed measurement rather than high-bandwidth conversion. Its 8-bit SAR architecture and serial control interface can reduce wiring and external interface complexity compared with a parallel ADC. The trade-off is that the supplied data does not confirm active current, standby current, or shutdown behavior, so a battery-life design must obtain those values from the manufacturer datasheet before finalizing the power budget.
Consumer Measurement Modules
The TLV0838IN can convert slow analog levels in compact consumer measurement modules where an 8-bit result and 37.9 kSPS throughput are adequate. A 3 V supply aligns with many low-voltage embedded systems, and ratiometric measurement can be advantageous when the sensed quantity is a ratio of the supply. Designers should verify that the 20-pin PDIP package is appropriate for the intended assembly process and that the input bandwidth satisfies the signal bandwidth.
Microcontroller Sensor Interfaces
The serial output of the TLV0838IN is useful for microcontrollers that have limited parallel I/O capacity. Eight-bit conversion data can be transferred through the serial control interface without requiring a wide data bus, helping conserve connector pins and board area. The device is better suited to slow monitoring channels than to high-rate sampling, and software must honor the manufacturer’s control and conversion timing requirements.
Legacy Through-Hole Data Acquisition
The 20-pin PDIP package makes the TLV0838IN relevant to legacy through-hole data-acquisition and prototype boards that cannot readily accept modern fine-pitch surface-mount packages. The family supports multiple channel counts and two reference strategies, allowing the same converter family to address different analog-front-end arrangements. Its 8-bit resolution limits measurement precision, so applications requiring finer quantization should compare newer or higher-resolution ADCs instead.
Datos de referencia de ingeniería para TLV0838IN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TLV0838IP |
|---|---|---|
| ADC Resolution | 8 bit | 8 bit |
| Sampling Rate | 37.9 kSPS | 37.9 kSPS |
| Supply Voltage | 3 V | 3 V |
| Input Channel Options | 4, 7, or 8 channels | 4, 7, or 8 channels |
| Architecture | Successive-approximation (SAR) | Successive-approximation (SAR) |
| Reference Mode | Ratiometric or VCC reference | Ratiometric or VCC reference |
| Interface | Serial, TTL/MOS compatible | Serial, TTL/MOS compatible |
| Package | 20-pin PDIP | 20-pin PDIP - same package |
| Brand | Texas Instruments | Texas Instruments |
| Mounting Type | Through-hole | Through-hole |
| Analog Input Range | VSS to VCC | VSS to VCC |
Diferenciadores clave
- Matches the full stated converter core (frente a TLV0838IP)
- Uses the same physical PCB footprint (frente a TLV0838IP)
- Supports multiple channel-count options (frente a TLV0838IP)
Notas de diseño
Do not treat the 8-bit resolution as equivalent to a higher-resolution converter. One code represents approximately 0.39% of the selected analog input span, while actual usable accuracy also depends on reference error, noise, source impedance, and the selected measurement range. Confirm the application’s required resolution and tolerance before using the TLV0838IN for a precision measurement.
Allow sufficient acquisition time for the analog input to settle before starting conversion, especially when the source has high impedance. The supplied data does not include input-impedance, capacitance, acquisition-time, or noise specifications, so obtain those values from the manufacturer datasheet and use the published settling criteria rather than assuming that the maximum 37.9 kSPS rate is suitable for every source.
Use a stable 3 V supply and verify the permitted supply tolerance, analog and digital ground arrangement, and decoupling requirements in the Texas Instruments datasheet. Ratiometric operation can reduce sensitivity to shared supply variation, but it does not remove errors from an independently varying sensor excitation or an unstable supply used outside the sensing loop.
The 20-pin PDIP package is mechanically suited to through-hole assembly, but its footprint and pin spacing require more board area than a comparable surface-mount ADC. Preserve the manufacturer’s recommended layout around analog inputs, reference connections, and interface signals. Because the supplied evidence does not include the official pin table or layout drawing, do not infer pad positions from an unverified package image.
Información de cumplimiento
The supplied web excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The device is an analog-to-digital converter and is not an automotive-qualified variant in the supplied ordering information.