AD7656YSTZ-1-RL - 16-Bit, 250kSPS 6-Ch Bipolar ADC | ADI
Teilenummer: AD7656YSTZ-1-RL ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $32.5 | $32,50 |
| 10 | $28.75 | $287,50 |
| 100 | $25.1 | $2.510,00 |
| 500 | $22.8 | $11.400,00 |
| 1.000 | $20.5 | $20.500,00 |
AD7656YSTZ-1-RL Übersicht
What is a successive-approximation ADC (SAR ADC)? A SAR ADC is a converter architecture that uses a binary search algorithm and an internal capacitive DAC to compare the sampled input against a reference. Each conversion takes a fixed number of clock cycles and produces a deterministic, low-latency result. SAR ADCs are valued for low power consumption, zero pipeline delay, and excellent DC accuracy, making them the standard choice for multi-channel data-acquisition systems, motor control, and instrumentation where simultaneous sampling and precise per-channel timing are required.
Key features of the AD7656YSTZ-1-RL include six independent 16-bit ADC cores, six true bipolar inputs with pin- or software-selectable ranges of ±5 V, ±10 V, 0 V to 5 V, and 0 V to 10 V, simultaneous sampling driven by three CONVST pins (one per ADC pair), and an integrated 2.5 V on-chip reference. The device supports both a high-speed parallel interface and a serial interface, allowing flexible connection to microprocessors, DSPs, or FPGAs. Power consumption is reduced to 140 mW at full throughput, with a power-down mode that drops the supply current to 6 µA.
Architecturally, the AD7656-1 family is pin- and software-compatible with the original AD7656/AD7657/AD7658 family, but with significantly reduced decoupling requirements - a single 0.1 µF capacitor on each AVCC is sufficient. The iCMOS process combines high-voltage bipolar input structures with sub-micron CMOS logic on one die, allowing ±10 V true bipolar inputs from a single 5 V supply. The internal reference can be used to drive the ADC and a small external buffer, or an external reference can be applied for ratiometric measurements.
Typical applications include multi-axis motor control and power-line monitoring, multi-channel instrumentation and process control, and data-acquisition systems. The wide bipolar input range, simultaneous sampling, and serial/parallel interface flexibility make it ideal for industrial PLC analog front-ends and three-phase power-quality analyzers.
When designing with the AD7656YSTZ-1-RL, note that the bipolar input range of ±10 V must be respected on every channel - the input clamps protect the device only up to ±20 V. Place a single 10 µF plus 100 nF decoupling pair near each AVCC pin and keep analog and digital grounds joined at a single point beneath the exposed pad.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für AD7656YSTZ-1-RL – 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 AD7656YSTZ-1-RL (gleiche Bauform und Footprint) – abweichend in Input Type, Package, Resolution, Architecture, RoHS Status.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AD7656YSTZ-1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7656BSTZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7656YSTZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7656A-1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS8556IPM
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS8558
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7656YSTZ-1-RL Grenzwerte & elektrische Eigenschaften
| Auflösung | 16 bits |
| Number of Channels | 6 |
| Abtastrate | 250 kSPS per channel |
| Architecture | Successive Approximation (SAR) |
| Input Type | True bipolar, single-ended |
| Input Voltage Ranges | ±5 V, ±10 V, 0-5 V, 0-10 V (pin/software selectable) |
| Simultaneous Sampling | Yes (3 CONVST pins) |
| Data Interface | Parallel + Serial |
| On-Chip Reference | 2.5 V |
| Power Consumption | 140 mW at 250 kSPS |
| Power-Down Current | 6 µA |
| Supply Voltage (AVCC) | 5 V |
| Supply Voltage (VDRIVE) | 2.7 V to 5.25 V |
| Betriebstemperaturbereich | -40 C to +85 C |
| Gehäuse | 64-LQFP (ST-10, 10x10 mm) |
| Montageart | Surface Mount |
| MSL-Level | 3 (168 hours) |
| RoHS-Status | Compliant |
| Process Technology | iCMOS (industrial CMOS) |
AD7656YSTZ-1-RL Pin-Konfiguration
| Pin 1 | AVCC — +5 V analog supply |
| Pin 2 | AVCC — +5 V analog supply |
| Pin 3 | AGND — Analog ground |
| Pin 4 | REFCAP — Reference bypass capacitor |
| Pin 5 | REFIN/OUT — Reference input/output (2.5 V nominal) |
| Pin 6 | REFGND — Reference ground |
| Pin 7 | V1 — Analog input channel 1 |
| Pin 8 | V2 — Analog input channel 2 |
| Pin 9 | V3 — Analog input channel 3 |
| Pin 10 | V4 — Analog input channel 4 |
| Pin 11 | V5 — Analog input channel 5 |
| Pin 12 | V6 — Analog input channel 6 |
| Pin 13 | AGND — Analog ground (input stage return) |
| Pin 14 | AVCC — +5 V analog supply (input stage) |
| Pin 15 | RANGE — Input range select (HW or SW) |
| Pin 16 | CONVST_A — Conversion start, ADC pair A (V1, V4) |
| Pin 17 | CONVST_B — Conversion start, ADC pair B (V2, V5) |
| Pin 18 | CONVST_C — Conversion start, ADC pair C (V3, V6) |
| Pin 19 | BUSY — Output: low while conversion in progress |
| Pin 20 | DGND — Digital ground |
| Pin 21 | VDRIVE — Logic supply (2.7 V to 5.25 V) |
| Pin 22 | DOUT_A — Serial data out, pair A |
| Pin 23 | DOUT_B — Serial data out, pair B |
| Pin 24 | DOUT_C — Serial data out, pair C |
| Pin 25 | DB15 — Parallel data bit 15 (MSB) |
| Pin 26 | DB14 — Parallel data bit 14 |
| Pin 27 | DB13 — Parallel data bit 13 |
| Pin 28 | DB12 — Parallel data bit 12 |
| Pin 29 | DB11 — Parallel data bit 11 |
| Pin 30 | DB10 — Parallel data bit 10 |
| Pin 31 | DB9 — Parallel data bit 9 |
| Pin 32 | DB8 — Parallel data bit 8 |
| Pin 33 | DB7 — Parallel data bit 7 |
| Pin 34 | DB6 — Parallel data bit 6 |
| Pin 35 | DB5 — Parallel data bit 5 |
| Pin 36 | DB4 — Parallel data bit 4 |
| Pin 37 | DB3 — Parallel data bit 3 |
| Pin 38 | DB2 — Parallel data bit 2 |
| Pin 39 | DB1 — Parallel data bit 1 |
| Pin 40 | DB0 — Parallel data bit 0 (LSB) |
| Pin 41 | DGND — Digital ground |
| Pin 42 | RD — Parallel read (active low) |
| Pin 43 | CS — Parallel chip select (active low) |
| Pin 44 | WR — Parallel write / input configuration (active low) |
| Pin 45 | OB/2C — Output coding: 0 = straight binary, 1 = twos complement |
| Pin 46 | SER/PAR — Interface mode select (1 = serial) |
| Pin 47 | HWL/SEL — Hardware/software mode for RANGE select |
| Pin 48 | STBY — Standby control |
| Pin 49 | RESET — Reset input (active low) |
| Pin 50 | SCLK — Serial interface clock |
| Pin 51 | SYNC — Serial interface sync |
| Pin 52 | DCEN — Daisy-chain enable (serial mode) |
| Pin 53 | W/B — Word/byte mode for serial interface |
| Pin 54 | AVCC — +5 V analog supply (PLL/digital) |
| Pin 55 | AGND — Analog ground |
| Pin 56 | AVCC — +5 V analog supply |
| Pin 57 | AGND — Analog ground |
| Pin 58 | AVCC — +5 V analog supply |
| Pin 59 | AVCC — +5 V analog supply |
| Pin 60 | AVCC — +5 V analog supply |
| Pin 61 | REGCAP — Internal regulator bypass |
| Pin 62 | DGND — Digital ground |
| Pin 63 | DGND — Digital ground |
| Pin 64 | EP — Exposed pad (recommended to tie to AGND for thermal dissipation) |
Typische Anwendungen
AD7656YSTZ-1-RL ist geeignet für 7 Anwendungs: Three-Phase Power Quality Analyzer, Multi-Axis Motor Control Feedback, PLC Analog Input Module, Data-Acquisition System (DAQ), Medical Patient Monitor Front-End, Automotive Test and Measurement, Audio and Vibration Analyzer.
Three-Phase Power Quality Analyzer
The AD7656YSTZ-1-RL's six true bipolar ±10 V inputs and simultaneous sampling (driven by three independent CONVST signals) map one-to-one onto the three phase voltages and three phase currents of a three-phase AC system. At 250 kSPS per channel a 50/60 Hz fundamental is oversampled by >4000x, enabling accurate harmonic analysis up to the 50th harmonic or higher. The integrated 2.5 V reference eliminates per-channel drift between voltage and current channels, which is critical for accurate real-power (W) and reactive-power (VAR) computation.
Empfohlen
Multi-Axis Motor Control Feedback
Industrial servo drives require precise, low-latency feedback of three-phase currents per axis; the AD7656YSTZ-1-RL delivers these via its simultaneous-sampling SAR architecture with zero pipeline delay. Current-sense amplifiers scale ±10 V or ±5 V shunt signals into the bipolar ranges the AD7656YSTZ-1-RL accepts natively, and the 140 mW power dissipation keeps junction temperatures low in a compact drive enclosure. At 250 kSPS per channel the device supports field-oriented control (FOC) loops with sub-microsecond effective latency.
Empfohlen
PLC Analog Input Module
Programmable-logic-controller (PLC) analog input modules typically need 4-8 voltage or current channels per slot, with ±10 V bipolar compliance for legacy industrial sensors. The AD7656YSTZ-1-RL delivers 6 bipolar channels per chip in a compact 64-LQFP footprint, fitting a 4-slot module with 16 channels of analog input. The pin/software-selectable input ranges let one module cover ±5 V, ±10 V, 0-5 V, and 0-10 V without external resistor networks. The serial interface option reduces microcontroller pin count, while the parallel option enables higher burst throughput.
Empfohlen
Data-Acquisition System (DAQ)
Multi-channel bench-top and rack-mount DAQ systems use the AD7656YSTZ-1-RL as the front-end ADC for vibration, strain-gauge, and general-purpose voltage measurements. Six simultaneous channels capture per-axis acceleration data from MEMS accelerometers or piezoelectric sensors without timing skew between channels. The -1 reduced-decoupling requirement cuts board space and BOM by eliminating the bank of bulk capacitors the original AD7656 needed; one 100 nF per AVCC pin plus a single 10 µF bulk is sufficient.
Empfohlen
Medical Patient Monitor Front-End
Multi-parameter patient monitors (ECG, EEG, EMG, SpO2) require 6 or more channels of low-noise, mid-bandwidth data acquisition. The AD7656YSTZ-1-RL's 16-bit resolution and bipolar inputs adapt naturally to conditioned bioelectric signals and ±5 V transducer outputs. The 250 kSPS per channel allows oversampling of slow bioelectric waveforms, while the 6 µA power-down mode supports battery-powered portable monitors. Note: medical-safety cert like IEC 60601-1 must be evaluated at the system level.
Empfohlen
Automotive Test and Measurement
Bench-top automotive test rigs measure battery voltage, current, and temperature on multi-cell battery stacks in parallel. The AD7656YSTZ-1-RL's 6-channel simultaneous sampling captures all 6 thermocouples or cell voltages at the same instant - critical for accurate thermal-runaway detection. The wide bipolar input range accommodates 12 V/24 V/48 V automotive systems directly. The operating temperature range of -40 C to +85 C covers underhood and cabin electronics; derate at extreme ambient as recommended by Analog Devices.
Empfohlen
Audio and Vibration Analyzer
Multi-channel vibration analyzers and audio test equipment use the AD7656YSTZ-1-RL for simultaneous multi-axis accelerometer capture. Six phase-locked channels capture vibration across the X/Y/Z axes of multiple transducers, eliminating time-skew artifacts in cross-channel frequency analysis. The 250 kSPS per channel supports vibration analysis up to ~100 kHz, covering most structural-health and NVH (noise, vibration, harshness) measurements. Bipolar input ranges adapt to IEPE-type accelerometer outputs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD7656YSTZ-1-RL – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AD7656YSTZ-1 | AD7656BSTZ | AD7656YSTZ | AD7656A-1 | ADS8556IPM | ADS8558 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Package | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (PM-10x10) | 64-LQFP (PM-10x10) |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 12 bits |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Channels | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Reduced Decoupling (-1 variant) | Yes | Yes | No | No | Yes (improved PSS) | Yes (TI variant) | Yes (TI variant) |
| On-Chip Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | Ext. only | Ext. only |
| Interface | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial |
| Operating Temp Range | -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 | -40 C to +85 C |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Wichtigste Unterscheidungsmerkmale
- True bipolar ±10 V inputs from a single 5 V supply (vs. ADS8556IPM)
- Integrated 2.5 V reference shared across all six channels (vs. ADS8558)
- Reduced-decoupling (-1) variant cuts BOM cost (vs. AD7656YSTZ (non- -1))
- Six independent converters with three CONVST pins (vs. AD7324BRUZ)
Designhinweise
The AD7656YSTZ-1-RL draws 140 mW at full 250 kSPS throughput and 6 µA in power-down. Estimated: at 5 V AVCC, peak supply current is approximately 28 mA; design the +5 V regulator to deliver at least 40 mA per chip with 100 mV headroom. Place a 10 µF bulk tantalum or polymer plus 100 nF ceramic pair within 25 mm of each AVCC pin. The reduced-decoupling specification applies only to the -1 die; if replacing with the original AD7656YSTZ non-(-1) variant, add the legacy bulk-capacitor network.
On the 64-LQFP, route analog inputs (V1-V6) on the inner layers or top with ground-shielded traces to avoid digital noise coupling. Keep digital outputs (DB0-DB15, DOUT_*, BUSY) grouped and away from the analog input traces. Reference the exposed pad to a single large ground plane island that ties into the analog ground at one star ground point under the IC. Recommended: dedicate separate analog and digital ground planes joined under the chip's exposed pad.
Do not exceed the bipolar input ±20 V clamp limit on V1-V6 - transients on industrial sensor lines can destroy the input stage. Place 10 kΩ input series resistors and bidirectional TVS clamps (e.g. 16 V) at each input. The on-chip reference requires a 10 µF (min) REFCAP capacitor; with less bypass, the ADC SNR degrades by 5-8 dB. Avoid using CONVST_A, CONVST_B, and CONVST_C simultaneously at asynchronous intervals if simultaneous-channel capture is needed - drive them from the same clock edge for true simultaneous sampling.
When using the parallel bus, place 22 Ω series damping resistors on each DB0-DB15 trace close to the ADC, and clamp each line with 1-10 kΩ pull-down to prevent floating-state transients at 250 kSPS. Estimated: total parallel-bus edge rate is approximately 6 ns with 50 pF total external load; the damping resistor reduces ringing amplitude by 30-50%. For serial mode, the DOUT_A/B/C lines transition at up to 50 MHz - keep these traces short (under 40 mm) and reference them to ground on both sides.
Compliance-Informationen
RoHS-compliant per ADI product page and DigiKey listing. AEC-Q100 not applicable - this is an industrial/consumer grade ADC not qualified for automotive production; see ADI automotive-grade variants separately. Conflict-mineral status per ADI corporate policy - check with ADI legal for specific declaration.
