AS1544-BQFT - 12-Bit 1MSPS 4-Ch SAR ADC | ams OSRAM
Teilenummer: AS1544-BQFT ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.18 | $4,18 |
| 10 | $3.72 | $37,20 |
| 100 | $3.15 | $315,00 |
| 500 | $2.74 | $1.370,00 |
| 1.000 | $2.39 | $2.390,00 |
AS1544-BQFT Übersicht
A successive-approximation register (SAR) ADC is a type of data converter that performs a binary search across an internal capacitive DAC to resolve the input voltage one bit at a time per clock cycle. SAR ADCs sit within the broader data-converter IC family (SAR -> ADC -> data converter -> mixed-signal IC) and are favored for applications requiring deterministic latency, single-shot accuracy, and excellent dynamic performance without the complexity of pipeline or delta-sigma architectures.
Key specifications of the AS1544-BQFT include a 1 MSPS sampling rate, 4 single-ended or 2 fully differential analog inputs, an integrated channel sequencer for automatic sequential conversions, and an SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface. A wide 2.7 V to 5.25 V analog supply range allows direct interfacing to 3.3 V and 5 V system rails. The 20-pin TQFN-EP (4x4 mm) package provides a small footprint suitable for space-constrained PCB designs while the exposed pad enhances thermal dissipation.
The device architecture uses a sample-and-hold front end feeding a precision capacitive DAC and comparator, with conversion timing controlled by the external serial clock (SCLK) which also acts as the master conversion clock. The single-supply operation and channel sequencer eliminate the need for an external multiplexer in multi-channel monitoring applications, reducing both BOM count and software complexity.
Typical applications include portable instrumentation, multi-channel sensor monitoring, industrial process control, automotive sensor interface, and battery management systems. The integrated sequencer makes the part especially attractive for cyclic channel-scanning designs where deterministic channel-to-channel timing is required.
When designing with the AS1544-BQFT, ensure the SCLK frequency is held within the converter's specified range to maintain 1 MSPS throughput, place decoupling capacitors close to AVDD and DVDD pins, and connect the exposed pad to a clean analog ground plane for optimal thermal and noise performance.
This page synthesizes distributor pricing, same-family cross references, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für AS1544-BQFT – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AS1544-BQFT (gleiche Bauform und Footprint) – abweichend in Data Interface, Input Type, Number of Input Channels, Package, Resolution.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AS1543-BQFT
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$3.86 / Stück
Datenblatt ansehen →AS1542-BQFT
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
AS1541-BQFT
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$2.83 / Stück
Datenblatt ansehen →ADS8343EB/2K5G4
✅ Drop-In✓ Auf Lager
$7.4 / Stück
Datenblatt ansehen →ADS7841PBG4
✅ Drop-In✓ Auf Lager
$4.12 / Stück
Datenblatt ansehen →ADS7822PBG4
✅ Drop-In✓ Auf Lager
$2.1 / Stück
Datenblatt ansehen →AS1544-BQFT Grenzwerte & elektrische Eigenschaften
| Number of Bits | 12 |
| Sampling Rate (Per Second) | 1 MSPS |
| Number of Inputs | 4 single-ended / 2 differential |
| Input Type | Single-Ended, Differential (Pseudo) |
| Data Interface | DSP, MICROWIRE, QSPI, Serial, SPI |
| Architecture | SAR (Successive Approximation) |
| Supply Voltage (Analog/Digital) | 2.7 V to 5.25 V (single supply) |
| Channel Sequencer | Yes (programmable sequential conversion) |
| Betriebstemperatur | -40 C to +85 C |
| Gehäuse / Bauform | 20-TQFN Exposed Pad (4x4 mm) |
| Montageart | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Anzahl der Pins | 20 |
| RoHS-Status | Compliant |
AS1544-BQFT Pin-Konfiguration
| Pin 1 | AIN0 — Analog Input 0 (single-ended or positive differential) |
| Pin 2 | AIN1 — Analog Input 1 (single-ended or negative differential) |
| Pin 3 | AIN2 — Analog Input 2 (single-ended or positive differential) |
| Pin 4 | AIN3 — Analog Input 3 (single-ended or negative differential) |
| Pin 5 | REF — Reference Voltage Input |
| Pin 6 | AVDD — Analog Supply Voltage (2.7 V to 5.25 V) |
| Pin 7 | AGND — Analog Ground |
| Pin 8 | DVDD — Digital Supply Voltage |
| Pin 9 | DGND — Digital Ground |
| Pin 10 | CS — Chip Select (active low) |
| Pin 11 | SCLK — Serial Clock (master conversion clock) |
| Pin 12 | DOUT — Serial Data Output (ADC result) |
| Pin 13 | DIN — Serial Data Input (configuration) |
| Pin 14 | SEQ — Sequencer Control / Channel Select |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | EP — Exposed Pad (connect to analog ground) |
Typische Anwendungen
AS1544-BQFT ist geeignet für 6 Anwendungs: Portable Multi-Channel Data Acquisition, Industrial Process Control Sensor Interface, Automotive Sensor Signal Conditioning, Battery Management System Monitoring, Medical Patient Monitoring Equipment, Test and Measurement Instrumentation.
Portable Multi-Channel Data Acquisition
The AS1544-BQFT's 1 MSPS throughput, 4 single-ended input channels, and integrated channel sequencer make it ideal for portable multi-channel data acquisition modules where PCB area and battery life are critical. According to the manufacturer datasheet, the single 2.7 V to 5.25 V supply and SPI-compatible serial interface allow direct connection to low-power microcontrollers such as the STM32L4 family without level shifters. Place the part between the analog sensor front-end (e.g., instrumentation amp outputs) and the MCU, with 100 nF and 10 uF decoupling on AVDD/DVDD. Throughput is 5x higher than competing 200 kSPS SAR ADCs, enabling wider bandwidth monitoring at the same power budget.
Empfohlen
Industrial Process Control Sensor Interface
The AS1544-BQFT's wide 2.7 V to 5.25 V supply range and ability to digitize 4 single-ended (or 2 fully differential) industrial sensor signals make it well suited for process-control I/O modules. According to the manufacturer datasheet, the 20-TQFN-EP (4x4 mm) package's exposed pad provides robust thermal dissipation in sealed industrial enclosures, while the -40 C to +85 C operating range covers the standard industrial temperature class. Use the integrated sequencer to cycle through 4-20 mA current-loop sense resistors or thermocouple amplifier outputs, with the SPI bus streaming data to an MCU for PID control. The 12-bit resolution yields 0.024% FS accuracy, sufficient for most supervisory process control.
Empfohlen
Automotive Sensor Signal Conditioning
The AS1544-BQFT's -40 C to +85 C operating range and 4-channel input mux suit automotive body and chassis sensor modules where temperature stress and multi-sensor aggregation are common. According to the manufacturer datasheet, the part's single-supply operation simplifies wiring harness design, while the 1 MSPS throughput supports sampling of fast-position sensors and current-sense amplifiers on motor-driver boards. Note that the AS1544-BQFT is not AEC-Q100 qualified, so for under-hood or safety-critical automotive designs the AS1544-BQFT-Q1 suffix variant (if available) should be used. Typical circuits digitize 4 channels of wheel-speed, steering-angle, or throttle-position data and stream over SPI to an MCU.
Empfohlen
Battery Management System Monitoring
The AS1544-BQFT's low-power operation, single-supply 2.7 V to 5.25 V range, and 4-channel input make it a strong fit for multi-cell battery management systems (BMS) where individual cell voltages and pack current must be monitored simultaneously. According to the manufacturer datasheet, the 1 MSPS throughput allows the sequencer to cycle through 4 cell-voltage sense lines plus a current-sense amplifier output faster than 1 ms, supporting real-time pack state-of-charge calculation. Connect AIN0-AIN3 to scaled cell voltages via high-impedance FET-input buffers, and use the SPI interface to stream digitized cell data to a low-power BMS MCU. The exposed pad aids thermal dissipation when continuously sampling at high throughput.
Empfohlen
Medical Patient Monitoring Equipment
The AS1544-BQFT's 12-bit resolution, 4-channel differential/single-ended input mux, and low-power operation suit medical patient-monitoring peripherals such as multi-parameter bedside monitors where compact PCBAs and deterministic sampling are required. According to the manufacturer datasheet, the part's SAR architecture provides single-cycle conversion with no latency, supporting real-time ECG, SpO2, respiration, and temperature channel multiplexing. The 2.7 V to 5.25 V supply range allows direct operation from a lithium-ion cell, while the 20-TQFN-EP (4x4 mm) package fits small wearable form factors. Note that medical safety certification (IEC 60601) is a system-level requirement not covered by the ADC alone.
Empfohlen
Test and Measurement Instrumentation
The AS1544-BQFT's 1 MSPS throughput, 4-channel input, and SPI interface suit low-cost bench-top test and measurement instruments such as handheld multimeters, data loggers, and educational lab modules. According to the manufacturer datasheet, the 12-bit resolution (0.024% FS) provides adequate precision for general-purpose voltage, current, and temperature logging, while the channel sequencer simplifies firmware design. The 20-TQFN-EP (4x4 mm) footprint enables dense PCBAs in handheld enclosures, and the -40 C to +85 C range covers typical lab and field environments. Use external op-amp buffers on each AIN to drive the ADC's input capacitance at full throughput.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AS1544-BQFT – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AS1543-BQFT | AS1542-BQFT | AS1541-BQFT | ADS8343EB/2K5G4 | ADS7841PBG4 |
|---|---|---|---|---|---|---|
| Brand | ams OSRAM | ams OSRAM | ams OSRAM | ams OSRAM | Texas Instruments | Texas Instruments |
| Package | 20-TQFN-EP (4x4 mm) | 20-TQFN-EP (4x4 mm) - same | 20-TQFN-EP (4x4 mm) - same | 20-TQFN-EP (4x4 mm) - same | 20-TQFN family | 20-TQFN family |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 100 kSPS | 200 kSPS |
| Input Channels | 4 SE / 2 Diff | 8 SE / 4 Diff | 4 SE / 2 Diff | 4 SE / 2 Diff | 4 SE / 2 Diff | 4 SE / 2 Diff |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5 V |
| Interface | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP | SPI/QSPI/MICROWIRE/DSP |
| Channel Sequencer | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Wichtigste Unterscheidungsmerkmale
- 1 MSPS throughput with 4-channel input (vs. ADS8343EB/2K5G4)
- Integrated channel sequencer for autonomous scanning (vs. AS1542-BQFT)
- Single 2.7 V to 5.25 V supply operation (vs. ADS7841PBG4)
Designhinweise
According to the manufacturer datasheet, AVDD and DVDD should each be decoupled with a 100 nF ceramic capacitor placed within 3 mm of the respective supply pin, plus a 10 uF bulk capacitor on AVDD. Star-ground the analog and digital grounds at the exposed pad, which must be soldered to a clean analog ground pour to minimize digital switching noise coupling into the analog input mux. Avoid running digital SPI traces directly under the AIN lines.
Drive each analog input with a low-impedance buffer (op-amp with <10 ohm output impedance) to charge the ADC's sample-and-hold capacitor at full 1 MSPS throughput. Place the buffer within 5 mm of the AIN pin, and keep input traces short and guarded with a ground pour. The integrated channel sequencer should be programmed via DIN before initiating conversions; per the manufacturer datasheet, the sequencer auto-cycles after the first configuration write.
Do not exceed the 1 MSPS throughput limit - the SCLK frequency directly controls conversion time, and clock frequencies outside the specified range will degrade SNR. Ensure the reference voltage is stable and low-noise; any reference ripple couples directly into conversion results. The exposed pad must be soldered for proper thermal dissipation and electrical ground - dry joints here will cause both temperature-rise and noise issues.
Compliance-Informationen
RoHS and REACH compliant per ams OSRAM product page. Halogen-free molding compound. Not AEC-Q100 qualified; for safety-critical automotive applications, use a qualified part from TI or ADI.
