TLV571IDW - 8-Bit 1.25 MSPS SAR ADC | Texas Instruments
MPN: TLV571IDW ✓ ActiveTLV571IDW Overview
An ADC is a data-acquisition semiconductor that converts a continuous analog voltage into a numeric code for processing, measurement, or control. The TLV571 belongs to the SAR ADC family, whose internal comparator and successive approximation process provide a practical balance between conversion speed, resolution, cost, and power consumption. It is designed for low-power, single-ended measurement systems operating from 3 V or 5 V supplies.
Key features include a maximum conversion rate of 1.25 MSPS, 625 kSPS operation at 3 V, differential and integral nonlinearity below ±0.5 LSB, and a wide analog input range of 0 V to AVDD. Binary and two's-complement output formats are supported. Hardware configuration, an internal oscillator, automatic power-down, and software power-down provide flexible control for portable and embedded systems.
The device combines an 8-bit ADC with an 8-bit parallel interface and two on-chip control registers accessible through the bidirectional port. These registers support software conversion start and power-down control. The parallel architecture can reduce the serial-interface overhead required by many low-resolution converters, making the TLV571 useful where deterministic sampling and direct bus connection are more important than very high integration.
Typical applications include industrial control, battery-powered instruments, process monitoring, consumer equipment, and embedded sensor acquisition. The single analog input and low operating power are particularly useful when a compact controller samples one slowly changing or periodically updated signal. The 5 V operating range also supports conventional industrial logic and DSP supply arrangements.
Designers should account for the ADC input range, source impedance, reference behavior, acquisition timing, and digital-interface timing. The parallel bus requires sufficient driver and routing margin on the host processor, while the analog input should be driven so that the internal sampling network can settle before conversion begins. The manufacturer datasheet remains the controlling reference for pin functions, timing, and application-specific implementation details.
This page consolidates verified manufacturer and distributor information, function-focused application guidance, parameter comparisons, and practical design considerations. It supplements the datasheet with purchasing context and structured engineering information while clearly identifying data that requires confirmation from the full manufacturer documentation.
Drop-in alternatives for TLV571IDW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
TLV571IDWG4
✅ Drop-In📋 Reference alternative (not in catalog)
TLV571IDW Maximum Ratings & Electrical Characteristics
| ADC Type | Successive-approximation-register (SAR) ADC |
| Resolution | 8 bit |
| Number of Channels | 1 channel |
| Maximum Throughput | 1.25 MSPS |
| Throughput at 3 V | 625 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Analog Input Range | 0 V to AVDD |
| Differential Nonlinearity | Less than ±0.5 LSB |
| Integral Nonlinearity | Less than ±0.5 LSB |
| Power at 3 V | 12 mW |
| Power at 5 V | 35 mW |
| Automatic Power-Down Current | 1 mA maximum |
| Software Power-Down Current | 10 µA maximum |
| Output Interface | 8-bit parallel |
| Supported Output Formats | Binary and two's complement |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 24-pin SOIC (DW) |
| Mounting Type | Surface mount |
| Internal Oscillator | Yes |
| Hardware Configuration | Yes |
| Reference Unit Price | $1.7709 as of 2026-10-28 |
| Stock Status | In stock as of 2026-10-28 |
TLV571IDW 24-pin soic (dw) Pin Configuration Guide
Pin configuration for TLV571IDW (24-pin soic (dw) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for TLV571IDW.
Refer to the datasheet for full pin configuration.
Typical Applications
TLV571IDW is suitable for 6 applications: Industrial Sensor Acquisition, Battery-Powered Portable Meter, Process and Threshold Monitoring, Digital Potentiometer and Control Loop, Consumer Interface and Key Scanning, Educational and Prototype Data Acquisition.
Industrial Sensor Acquisition
The TLV571IDW fits industrial sensor acquisition when one analog channel must be digitized into an 8-bit code for a controller or display. Its 1.25 MSPS maximum throughput and 625 kSPS rate at 3 V are sufficient for many pressure, temperature, position, and level signals, while the 0 V to AVDD input range supports conditioned unipolar sensors. The 8-bit parallel interface reduces serial overhead in a PLC-oriented control board. Design the input network to settle within the converter’s acquisition interval and use the manufacturer timing information to coordinate hardware conversion start with bus capture.
Recommended
Battery-Powered Portable Meter
The TLV571IDW is appropriate for a battery-powered portable meter because it operates from 2.7 V to 5.5 V and consumes 12 mW at 3 V according to the Texas Instruments manufacturer datasheet. Automatic power-down is specified at 1 mA maximum, while software power-down is specified at 10 µA maximum, allowing intermittent measurement operation. The 8-bit resolution provides 256 codes across the analog range for display or threshold decisions. A practical implementation can keep the converter disabled between samples, enable it, acquire one or more readings, and return the host to a low-power state.
Recommended
Process and Threshold Monitoring
The TLV571IDW can monitor a conditioned process variable when 8-bit quantization is sufficient for threshold decisions, status indication, or slow feedback. Its single-ended 0 V to AVDD input range accepts a scaled transducer signal, and the specified differential and integral nonlinearity below ±0.5 LSB limits code-distortion concerns. The 1.25 MSPS maximum rate also allows repeated sampling for peak or trend detection. Keep the analog front end local to the converter, minimize leakage around high-impedance sensors, and verify acquisition settling against the source impedance before interpreting small code changes.
Recommended
Digital Potentiometer and Control Loop
The TLV571IDW is suitable for closing a simple digital control loop around a potentiometer, sensor, or resistive divider. The 8-bit parallel output provides direct feedback to a microcontroller, and 1.25 MSPS throughput is more than adequate for typical low-bandwidth control loops. At 3 V, the converter supports 625 kSPS, while power use is listed as 12 mW. The implementation should account for the ADC input bandwidth, sampling capacitor settling, and control-loop delay; the converter should not be oversampled without confirming that the input can drive the required acquisition capacitance.
Recommended
Consumer Interface and Key Scanning
The TLV571IDW can digitize a resistive control or simple analog input in consumer equipment, providing an 8-bit value for LED brightness, menu positioning, or keypad thresholding. Its parallel output can be read efficiently by an embedded controller, and the 2.7 V minimum supply supports compact portable systems. A 1.25 MSPS maximum rate allows rapid scanning when several muxed sensor channels are added around the converter. Keep the input divider and switch resistance low enough for settling, and account for the control-register interface when coordinating software conversion start and power-down.
Recommended
Educational and Prototype Data Acquisition
The TLV571IDW is practical for educational prototypes and laboratory instruments that require an accessible, parallel-output ADC rather than a serial-interface converter. Its 8-bit resolution, 1.25 MSPS maximum throughput, and 2.7 V to 5.5 V supply range simplify laboratory wiring around 3.3 V or 5 V logic. The 24-pin SOIC package also provides accessible pins for educational assembly. Designers should use the official datasheet for pin names, control-register timing, and the exact conversion sequence, while the device’s parallel bus length should remain short enough to preserve signal integrity.
Recommended
Recommended Products Summary
Engineering reference data for TLV571IDW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLV571IDWG4 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 24-pin SOIC (DW) | 24-pin SOIC (DW) |
| Resolution | 8 bit | 8 bit |
| Number of Channels | 1 channel | 1 channel |
| Maximum Throughput | 1.25 MSPS | 1.25 MSPS |
| Throughput at 3 V | 625 kSPS | 625 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Analog Input Range | 0 V to AVDD | 0 V to AVDD |
| Output Interface | 8-bit parallel | 8-bit parallel |
| Differential Nonlinearity | Less than ±0.5 LSB | Less than ±0.5 LSB |
| Integral Nonlinearity | Less than ±0.5 LSB | Less than ±0.5 LSB |
| Power at 3 V | 12 mW | 12 mW |
| Power at 5 V | 35 mW | 35 mW |
Key Differentiators
- Direct 8-bit parallel data transfer (vs TLV571IDWG4)
- Throughput suited to compact acquisition systems (vs TLV571IDWG4)
- Low-power operation with flexible shutdown (vs TLV571IDWG4)
Design Notes
Use the TLV571IDW’s stated operating range of 2.7 V to 5.5 V to define the analog, digital, and reference supplies. Power is specified as 12 mW at 3 V and 35 mW at 5 V, so a 5 V design has a higher stated consumption. For intermittent measurements, use the documented automatic or software power-down modes and confirm that the host waits for the required startup and conversion interval before reading the parallel output.
Treat the 8-bit output as a synchronous parallel bus. Route D7 through D0, conversion control, and the bidirectional control-register signals together over a compact board area, and use the datasheet timing information to establish setup and hold requirements. Avoid long traces or unnecessary stubs, particularly where the ADC and host use different supply domains. The converter’s 1.25 MSPS maximum rate should not be treated as permission to relax digital timing when operating with slow or heavily loaded host buses.
The verified input specification is 0 V to AVDD, so do not apply a negative or above-rail signal without suitable conditioning and protection. Also verify source impedance and acquisition settling before using the maximum conversion rate with a resistive divider or sensor. The TLV571IDWG4 appears in the verified results as a close family alternative, but its ordering attributes should be confirmed in TI’s current ordering table rather than inferred from the suffix alone.
Place the analog input and supply connections close to the converter and keep the parallel digital outputs away from the analog input trace. Provide the decoupling arrangement specified in the manufacturer datasheet and maintain a quiet return path for AVDD. Since the package is a 24-pin SOIC, check the complete official pin configuration before assigning power, ground, analog input, and control functions on the PCB.
Compliance Information
The supplied search extracts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The TLV571IDWG4 G4 suffix should not be treated as proof of a specific compliance claim without the current TI product documentation.
