AD7653ASTZRL - 16-Bit 1 MSPS SAR ADC | Analog Devices | LQFP-48
Teilenummer: AD7653ASTZRL ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.4 | $164,00 |
| 100 | $14.3 | $1.430,00 |
| 500 | $12.65 | $6.325,00 |
| 1.000 | $11.2 | $11.200,00 |
AD7653ASTZRL Übersicht
What is a SAR ADC? A successive-approximation register analog-to-digital converter is a precision data converter that resolves the input voltage through a binary search using a single comparator and a switched-capacitor DAC. Compared to pipeline ADCs, SAR converters offer zero latency (true single-shot conversion), deterministic behavior, and excellent DC accuracy with low power consumption, which makes them ideal for multiplexed data acquisition, industrial process control, and precision instrumentation. Within the broader signal-chain taxonomy, a precision SAR ADC sits above general-purpose 12-bit ADCs but below 18/24-bit delta-sigma converters in resolution, trading oversampling for single-cycle latency.
Key features include 16-bit resolution with no missing codes, throughput of 1 MSPS in Warp mode (800 kSPS Normal, 666 kSPS Impulse), internal 2.5V reference, on-chip reference buffer, software-configurable analog input ranges (0V to VREF / 0V to 2×VREF), and selectable parallel or serial interface. The integrated reference eliminates external reference noise pickup and simplifies BOM. The pulSAR core delivers typical INL of ±1 LSB and SNR of 86 dB, supporting demanding measurement bandwidths.
Architecturally, the AD7653 uses ADI's proprietary pulSAR switching technique that minimizes input transient currents and allows direct connection to high-impedance front-ends with minimal settling time. Power dissipation is 25 mW at 1 MSPS, scaling linearly with throughput - a major efficiency advantage over continuously-sampling converters. The device supports hardware/software configurable input ranges and provides an internal clock option.
Typical applications include industrial process control (PLC analog front-ends), multichannel data acquisition systems, precision weigh scales, instrumentation and medical imaging front-ends, and digital oscilloscope input stages. The combination of true 16-bit accuracy, internal reference, and zero pipeline delay suits closed-loop control loops where each sample must be acted upon in real time.
When designing with this device, ensure adequate input RC anti-alias filtering, place the AVCC decoupling capacitors as close as possible to the supply pins, and route the AGND/DGND grounds as a star at the device. Compared to discrete ADC + external reference designs, the integrated reference reduces long-term drift and improves thermal stability across the -40C to +85C industrial range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für AD7653ASTZRL – 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 AD7653ASTZRL (gleiche Bauform und Footprint) – abweichend in Architecture, Package, Resolution, Input Type, Sample Rate.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AD7653ASTZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7653ACPZRL
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
AD7623ASTZRL
✅ Drop-In✓ Auf Lager
$18.9 / Stück
Datenblatt ansehen →AD7650ACPZRL
✅ Drop-In✓ Auf Lager
$17.92 / Stück
Datenblatt ansehen →AD7656YSTZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS8482IBRGZR
✅ Drop-In✓ Auf Lager
$14.45 / Stück
Datenblatt ansehen →ADS8472IRGZR
✅ Drop-In✓ Auf Lager
$8.5 / Stück
Datenblatt ansehen →AD7653ASTZRL Grenzwerte & elektrische Eigenschaften
| Auflösung | 16 bit |
| Number of Inputs | 1 |
| Architecture | SAR (pulSAR) |
| Throughput (Warp mode) | 1 MSPS |
| Throughput (Normal mode) | 800 kSPS |
| Throughput (Impulse mode) | 666 kSPS |
| Analog Input Range | 0V to VREF / 0V to 2xVREF (software-configurable) |
| Internal Reference | 2.5 V |
| Pipeline Delay | 0 (none, single-cycle SAR) |
| Data Interface | Parallel and Serial (software-selectable) |
| Analog Supply Voltage | 5 V nominal |
| Power Dissipation (1 MSPS) | 25 mW |
| Betriebstemperaturbereich | -40C to +85C |
| Gehäuse / Bauform | 48-LQFP (7x7 mm) |
| Package Suffix | ST = LQFP, Z = Lead-free, RL = Tape & Reel |
| INL (typical) | ±1 LSB |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
AD7653ASTZRL Pin-Konfiguration
| Pin 1 | DGND — Digital ground |
| Pin 2 | DB0 — Data bit 0 (LSB) |
| Pin 3 | DB1 — Data bit 1 |
| Pin 4 | DB2 — Data bit 2 |
| Pin 5 | DB3 — Data bit 3 |
| Pin 6 | DB4 — Data bit 4 |
| Pin 7 | DB5 — Data bit 5 |
| Pin 8 | DB6 — Data bit 6 |
| Pin 9 | DB7 — Data bit 7 |
| Pin 10 | DB8 — Data bit 8 |
| Pin 11 | DB9 — Data bit 9 |
| Pin 12 | DB10 — Data bit 10 |
| Pin 13 | DB11 — Data bit 11 |
| Pin 14 | DB12 — Data bit 12 |
| Pin 15 | DB13 — Data bit 13 |
| Pin 16 | DB14 — Data bit 14 |
| Pin 17 | DB15 — Data bit 15 (MSB) |
| Pin 18 | RDC — Read data / serial clock |
| Pin 19 | CS — Chip select, active low |
| Pin 20 | BUSY — Conversion busy output, active high |
| Pin 21 | OB/2C — Output bus / serial data |
| Pin 22 | WARP — Warp mode select, active high |
| Pin 23 | IMPULSE — Impulse mode select, active high |
| Pin 24 | RANGE — Input range select |
| Pin 25 | AVCC — Analog 5V supply |
| Pin 26 | AGND — Analog ground |
| Pin 27 | REF — Reference decoupling pin |
| Pin 28 | REFCAP — Reference bypass capacitor |
| Pin 29 | REFGND — Reference ground |
| Pin 30 | IN+ — Analog input positive |
| Pin 31 | IN- — Analog input negative (tied to AGND for unipolar) |
| Pin 32 | AGND — Analog ground (return path) |
| Pin 33 | AVCC — Analog 5V supply |
| Pin 34 | AGND — Analog ground |
| Pin 35 | AVCC — Analog 5V supply |
| Pin 36 | PWRDWN — Power down, active low |
| Pin 37 | STBY — Standby mode, active low |
| Pin 38 | RESET — Reset, active low |
| Pin 39 | CONVST — Conversion start, active low |
| Pin 40 | CLK — External clock input |
| Pin 41 | CLKSEL — Clock select (internal/external) |
| Pin 42 | DGND — Digital ground |
| Pin 43 | HBE — High byte enable (parallel mode) |
| Pin 44 | LBE — Low byte enable (parallel mode) |
| Pin 45 | SER/PAR — Serial/parallel mode select |
| Pin 46 | DOUT — Serial data output |
| Pin 47 | SCLK — Serial clock input |
| Pin 48 | SYNC — Synchronization, active low |
Typische Anwendungen
AD7653ASTZRL ist geeignet für 7 Anwendungs: Industrial Process Control (PLC Analog Input), Precision Weigh Scale / Load Cell Measurement, Data Acquisition Systems (DAQ) Front-End, Medical Instrumentation Front-End, Digital Oscilloscope / Spectrum Analyzer Input Stage, Power Line Monitoring / Three-Phase Energy Metering, Vibration and Acoustic Monitoring.
Industrial Process Control (PLC Analog Input)
The AD7653ASTZRL is well-suited for PLC analog input modules that require 16-bit resolution, 1 MSPS throughput, and industrial temperature operation. Its integrated 2.5V reference eliminates the need for an external reference IC, reducing BOM cost in multi-channel 4-20 mA loop-powered modules. With SAR zero-pipeline-delay architecture, the device delivers deterministic conversion time critical for closed-loop proportional-integral control loops. The 48-LQFP-7x7 footprint allows placement adjacent to a multiplexer that scans multiple input channels, with single-cycle latency preserving control-loop stability. Typical signal-conditioning uses a front-end instrumentation amplifier (e.g., AD8221) plus an RC anti-alias filter; the ADC's wide input bandwidth supports scan rates up to 100 kHz per channel.
Empfohlen
Precision Weigh Scale / Load Cell Measurement
Weigh scales and force measurement systems benefit from the AD7653ASTZRL's 16-bit no-missing-codes resolution and integrated low-noise reference. Load cells produce millivolt-level differential signals at low frequency; the ADC's low-INL SAR core and high CMRR make it ideal for digitizing the bridge output of a 24-bit ADC companion or for medium-precision industrial scales up to 0.01% accuracy. The 5V single-supply operation simplifies power design in portable handheld scales, and the 1 MSPS throughput allows multiple strain-gauge channels to be multiplexed at 100 Hz update rates with substantial oversampling for noise averaging. The zero-latency SAR architecture eliminates settling delays that would otherwise limit throughput in multiplexed channels.
Empfohlen
Data Acquisition Systems (DAQ) Front-End
Multi-channel data-acquisition cards based on the AD7653ASTZRL can scan 16+ analog input channels at high throughput by combining the 1 MSPS ADC with an external multiplexer. The pulSAR architecture delivers ±1 LSB INL typical and excellent AC performance for vibration, acoustic, and seismic measurement. The parallel interface option supports FPGA-based DAQ designs where the 1 MSPS rate must be sustained without DMA stalls, while the serial interface mode simplifies connection to microcontrollers and DSPs at lower data rates. Compared to multi-channel delta-sigma ADCs, the AD7653 provides true single-cycle conversion with deterministic timing, which simplifies interrupt-driven firmware in industrial embedded controllers.
Empfohlen
Medical Instrumentation Front-End
Patient-monitoring and diagnostic-instrumentation front-ends use the AD7653ASTZRL to digitize bioelectric signals (ECG, EMG, EEG) and pressure/temperature sensor outputs. The 16-bit resolution and zero-pipeline-delay SAR architecture avoid latency that could corrupt real-time waveform display, while the integrated reference provides the long-term stability needed for 24-hour patient-monitoring traces. The -40C to +85C industrial temperature range supports portable medical-device enclosures, and the 48-LQFP surface-mount package simplifies automated PCB assembly. Typical signal chain uses an AD8221 instrumentation amp for ECG with right-leg drive, followed by an anti-alias RC filter and the AD7653 at 1 MSPS to capture the full diagnostic bandwidth.
Empfohlen
Digital Oscilloscope / Spectrum Analyzer Input Stage
The AD7653ASTZRL's 1 MSPS Warp-mode throughput makes it usable in digitizer sub-systems and low-bandwidth oscilloscope front-ends, particularly for repetitive waveform capture where equivalent-time sampling extends the effective bandwidth. The 16-bit dynamic range outperforms 8/10-bit oscilloscope ADCs by 30-40 dB, enabling sensitive harmonic-distortion and noise measurements. Combined with an external low-noise front-end amplifier (e.g., AD8009 or AD8055) and an anti-alias filter, the ADC provides low-cost 16-bit measurement front-ends for production-test ATE and bench-top instrumentation. The parallel digital interface allows direct connection to FPGAs that perform real-time DSP such as FFT analysis.
Empfohlen
Power Line Monitoring / Three-Phase Energy Metering
Three-phase power-quality meters and energy-monitoring systems use the AD7653ASTZRL (or its higher-throughput variant AD7656YSTZ for simultaneous sampling) to digitize voltage and current waveforms sampled at 4 kSPS to 16 kSPS for 50/60 Hz line frequencies plus harmonic analysis up to the 50th harmonic. The 16-bit resolution captures both fundamental and harmonic content with 84 dB of spurious-free dynamic range, while the integrated reference provides 0.1% gain accuracy over the industrial temperature range. The zero-pipeline-delay SAR architecture ensures phase-correct sampling across voltage and current channels, which is essential for accurate active/reactive power computation. Communication is typically through the serial SPI interface to a microcontroller that calculates per-phase power.
Empfohlen
Vibration and Acoustic Monitoring
Condition-monitoring and vibration-analysis systems digitize accelerometer and microphone outputs using the AD7653ASTZRL at sample rates of 10-100 kSPS per channel. The 16-bit dynamic range captures both DC bias and AC vibration signatures, while the SAR architecture's lack of latency ensures phase-coherent multi-channel sampling from multiple accelerometers mounted on rotating machinery. The integrated reference provides low long-term drift critical for trending vibration spectra over months of operation. Compared to oversampling delta-sigma ADCs, the SAR architecture supports higher per-channel sample rates and more flexible trigger-driven capture, which is useful for impact-detection and transient-event analysis in industrial condition monitoring.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD7653ASTZRL – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AD7653ASTZ | AD7623ASTZRL | AD7656YSTZ | ADS8482IBRGZR |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-TQFP (RGZ) - equivalent |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Throughput (max) | 1 MSPS (Warp) | 1 MSPS | 1.25 MSPS | 250 kSPS/ch (6 ch) | 1 MSPS |
| Number of Channels | 1 | 1 | 1 | 6 (simultaneous) | 1 |
| Internal Reference | 2.5 V (yes) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (4.096V) |
| Input Range | 0V-VREF / 0V-2xVREF (unipolar) | Same as AD7653ASTZRL | Differential (pseudo-bipolar) | 0V-VREF / 0V-2xVREF | 0V-4.096V unipolar |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pipeline Delay | 0 (SAR) | 0 | 0 | 0 | 0 |
Wichtigste Unterscheidungsmerkmale
- Integrated 2.5V precision reference eliminates external reference BOM (vs. ADS8482IBRGZR)
- Single-channel 1 MSPS throughput in small 48-LQFP footprint (vs. AD7656YSTZ)
- Software-configurable 0V-VREF or 0V-2xVREF input range (vs. AD7623ASTZRL)
- Zero pipeline delay SAR architecture for closed-loop control (vs. AD7606)
Designhinweise
The AD7653ASTZRL draws approximately 25 mW at 1 MSPS from a single 5V analog supply. Decouple AVCC with a 10 uF tantalum bulk capacitor plus a 100 nF ceramic placed within 5 mm of the AVCC pins (25, 33, 35); place an additional 10 uF on the REFCAP pin. Estimated: at 5V supply and 1 MSPS, supply current is approximately 5 mA, giving 25 mW dissipation. Use a star-ground topology with separate analog and digital ground returns tied at the ADC's AGND/DGND pins to avoid digital return currents in the analog signal path. For applications requiring low-noise ADC operation, add an external ADP150 3.3V LDO or ferrite-bead-filtered 5V rail to isolate the ADC from digital switching noise on the board.
Use a 4-layer PCB with a dedicated ground plane and a split power plane (5V analog on top, 3.3V digital below). Place the ADC, analog input amplifier, and reference bypass capacitors on the same layer, avoiding vias in the analog signal path. Keep digital traces (DB0-DB15, BUSY, CS, CONVST) routed away from the analog input pin (IN+, IN-) and the REFCAP pin; if traces must cross, cross perpendicular and keep ground plane continuity. Place a guard ring around the analog input pins tied to AGND to absorb stray leakage from digital signals. The exposed pad of the LQFP-48 should be soldered to the analog ground plane for thermal and electrical performance.
The AD7653ASTZRL achieves full 16-bit performance only with proper input RC filtering and ground layout. Use a 100 ohm series resistor plus 1 nF capacitor at the ADC input to limit the input bandwidth to about 1.6 MHz (-3 dB), which provides adequate anti-alias filtering for the 1 MSPS sample rate (Nyquist 500 kHz). Estimated: input bandwidth (-3 dB) is 1/(2 x pi x R x C) = 1.59 MHz. Keep the input trace length below 25 mm and place the RC filter within 10 mm of the IN+ pin. Match impedance from the front-end amplifier to the ADC input to avoid reflections that could cause settling errors during the 200 ns acquisition window.
Avoid the following common errors: (1) Do not connect the IN- pin to any signal source; tie it directly to AGND at the pin. (2) Do not exceed the absolute maximum analog input of AVCC + 0.3V or below AGND - 0.3V; use external clamping diodes or an ADG708 multiplexer with overvoltage protection. (3) The 2.5V internal reference requires 10 uF on REFCAP; insufficient bypass causes gain error and degraded linearity. (4) In Warp mode, the BUSY signal remains active continuously - ensure the FPGA reads data within the conversion period; switching to Normal mode if excessive jitter is observed. (5) The 48-LQFP pin spacing is 0.5 mm - use ENIG surface finish and 0.1 mm solder paste apertures for reliable assembly.
Compliance-Informationen
RoHS compliant per Analog Devices product page. Lead-free LQFP package with Matte Tin lead finish. The ST suffix indicates industrial temperature grade (-40C to +85C); not AEC-Q100 qualified.
