AD7609BSTZ - 18-Bit 8-Ch Simultaneous Sampling ADC | Analog Devices
MPN: AD7609BSTZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $52.63 | $52.63 |
| 10 | $48.5 | $485.00 |
| 100 | $42.1 | $4,210.00 |
| 500 | $36.8 | $18,400.00 |
| 1,000 | $32.5 | $32,500.00 |
Drop-in alternatives for AD7609BSTZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7609BSTZ-RL
β Drop-Inπ Reference alternative (not in catalog)
AD7606BSTZ
β Drop-Inβ In Stock
$17.2 / Unit
View Datasheet βAD7608BSTZ
β Drop-Inβ In Stock
$21.2 / Unit
View Datasheet βAD7607BSTZ
β Drop-Inπ Reference alternative (not in catalog)
AD7606BSTZ-6
β Drop-Inπ Reference alternative (not in catalog)
AD7609BSTZ Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Number of Channels | 8 |
| Sampling Rate | 200 kSPS |
| Input Type | Differential |
| Input Voltage Range | Β±5 V, Β±10 V |
| Interface | SPI, DSP, Parallel |
| Reference Type | Internal, External |
| Reference Voltage | 2.5 V |
| Supply Voltage | 4.75 V to 5.25 V |
| Power Dissipation | 142 mW (typical) |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Number of Bits | 18 |
| Data Acquisition System | Yes |
AD7609BSTZ Pin Configuration
| Pin 1 | AVCC β Analog supply voltage (5 V) |
| Pin 2 | V1 β Analog input channel 1 (positive) |
| Pin 3 | V1GND β Analog input channel 1 (negative) |
| Pin 4 | V2 β Analog input channel 2 (positive) |
| Pin 5 | V2GND β Analog input channel 2 (negative) |
| Pin 6 | V3 β Analog input channel 3 (positive) |
| Pin 7 | V3GND β Analog input channel 3 (negative) |
| Pin 8 | V4 β Analog input channel 4 (positive) |
| Pin 9 | V4GND β Analog input channel 4 (negative) |
| Pin 10 | V5 β Analog input channel 5 (positive) |
| Pin 11 | V5GND β Analog input channel 5 (negative) |
| Pin 12 | V6 β Analog input channel 6 (positive) |
| Pin 13 | V6GND β Analog input channel 6 (negative) |
| Pin 14 | V7 β Analog input channel 7 (positive) |
| Pin 15 | V7GND β Analog input channel 7 (negative) |
| Pin 16 | V8 β Analog input channel 8 (positive) |
| Pin 17 | V8GND β Analog input channel 8 (negative) |
| Pin 18 | AGND β Analog ground |
| Pin 19 | REFIN/REFOUT β Reference input/output |
| Pin 20 | REFCAP β Reference buffer output |
| Pin 21 | AVCC β Analog supply voltage (5 V) |
| Pin 22 | AVCC β Analog supply voltage (5 V) |
| Pin 23 | AGND β Analog ground |
| Pin 24 | RANGE β Input range select (Β±5 V or Β±10 V) |
| Pin 25 | OS0 β Oversampling ratio bit 0 |
| Pin 26 | OS1 β Oversampling ratio bit 1 |
| Pin 27 | OS2 β Oversampling ratio bit 2 |
| Pin 28 | PAR/SER/BYTE β Parallel/serial/byte select |
| Pin 29 | STBY β Standby mode |
| Pin 30 | CONVST A β Conversion start A |
| Pin 31 | CONVST B β Conversion start B |
| Pin 32 | CS β Chip select |
| Pin 33 | RD/SCLK β Read/Serial clock |
| Pin 34 | WR/DIN β Write/Serial data in |
| Pin 35 | BUSY β Busy output |
| Pin 36 | FRSTDATA β First data output |
| Pin 37 | DB0 β Parallel data bit 0 |
| Pin 38 | DB1 β Parallel data bit 1 |
| Pin 39 | DB2 β Parallel data bit 2 |
| Pin 40 | DB3 β Parallel data bit 3 |
| Pin 41 | DB4 β Parallel data bit 4 |
| Pin 42 | DB5 β Parallel data bit 5 |
| Pin 43 | DB6 β Parallel data bit 6 |
| Pin 44 | DB7 β Parallel data bit 7 |
| Pin 45 | DB8 β Parallel data bit 8 |
| Pin 46 | DB9 β Parallel data bit 9 |
| Pin 47 | DB10 β Parallel data bit 10 |
| Pin 48 | DB11 β Parallel data bit 11 |
| Pin 49 | DB12 β Parallel data bit 12 |
| Pin 50 | DB13 β Parallel data bit 13 |
| Pin 51 | DB14 β Parallel data bit 14 |
| Pin 52 | DB15 β Parallel data bit 15 |
| Pin 53 | DVCC β Digital supply voltage |
| Pin 54 | DGND β Digital ground |
| Pin 55 | RESET β Reset input |
| Pin 56 | DOUTA β Serial data output A |
| Pin 57 | DOUTB β Serial data output B |
| Pin 58 | DB16 β Parallel data bit 16 |
| Pin 59 | DB17 β Parallel data bit 17 |
| Pin 60 | DB18 β Parallel data bit 18 |
| Pin 61 | DB19 β Parallel data bit 19 |
| Pin 62 | DB20 β Parallel data bit 20 |
| Pin 63 | DB21 β Parallel data bit 21 |
| Pin 64 | DB22 β Parallel data bit 22 |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7609BSTZ is suitable for 6 applications: Power Line Monitoring, Motor Control, Industrial Data Acquisition, Protective Relays, Medical Instrumentation, Test and Measurement.
Power Line Monitoring
The AD7609BSTZ's 8-channel simultaneous sampling and 18-bit resolution enable accurate measurement of three-phase voltages and currents with precise phase alignment. Its Β±10 V input range directly interfaces with voltage and current transformers, while the integrated antialiasing filter simplifies signal conditioning. The 200 kSPS throughput supports harmonic analysis up to the 40th harmonic of 50/60 Hz power systems. The device's robust input clamp protection (Β±16.5 V) ensures reliability in transient-rich power environments. This makes it ideal for power quality analyzers, smart grid sensors, and protective relays.
Recommended
Motor Control
In motor control, the AD7609BSTZ provides simultaneous sampling of three-phase currents and voltages, essential for accurate vector control algorithms. The 18-bit resolution ensures precise current sensing, improving torque control and reducing harmonic distortion. The 200 kSPS sampling rate is sufficient for high-bandwidth current loops. The differential inputs reject common-mode noise from motor drives, and the integrated reference simplifies design. The device operates from a single 5 V supply, compatible with industrial control systems. Its industrial temperature range (-40Β°C to +85Β°C) suits harsh factory environments.
Recommended
Industrial Data Acquisition
The AD7609BSTZ is a complete data acquisition system for industrial applications requiring high accuracy and multi-channel synchronization. Its 8 differential inputs can be configured for Β±5 V or Β±10 V ranges, accommodating various sensor outputs. The integrated antialiasing filter and track-and-hold amplifiers reduce external component count and design complexity. The serial SPI interface simplifies connection to microcontrollers, while the parallel interface offers high-speed data transfer. The device's low power consumption (142 mW) is suitable for portable data loggers. The wide operating temperature range ensures reliable operation in industrial settings.
Recommended
Protective Relays
Protective relays require fast and accurate measurement of voltage and current waveforms to detect faults. The AD7609BSTZ's simultaneous sampling ensures that all channels are captured at the same instant, preserving phase relationships critical for distance and differential protection. The 18-bit resolution provides high dynamic range for detecting small fault currents. The 200 kSPS throughput allows sampling of 50/60 Hz waveforms with high oversampling for accurate RMS calculation. The integrated input clamp protection (Β±16.5 V) withstands transient surges. The device's parallel interface enables fast data transfer to the relay's processor.
Recommended
Medical Instrumentation
In medical instrumentation, the AD7609BSTZ provides high-resolution, multi-channel data acquisition for applications like patient monitoring and diagnostic equipment. The 18-bit resolution ensures accurate measurement of physiological signals, such as ECG and EEG, which require high dynamic range. The simultaneous sampling capability is beneficial for multi-lead ECG systems where timing alignment is crucial. The low power consumption is advantageous for portable devices. The device's small 64-LQFP package fits compact PCB designs. The industrial temperature range is suitable for clinical environments.
Recommended
Test and Measurement
The AD7609BSTZ is ideal for test and measurement equipment, such as data loggers, spectrum analyzers, and multi-channel recorders. Its 18-bit resolution and 200 kSPS sampling rate enable accurate capture of transient signals. The simultaneous sampling ensures phase-accurate measurements across channels, essential for analyzing multi-phase systems. The flexible interface (SPI/parallel) allows easy integration with FPGAs and DSPs. The device's wide input range (Β±10 V) accommodates various signal levels without external scaling. The integrated reference and antialiasing filter reduce external component count, simplifying design.
Recommended
Recommended Products Summary
Engineering reference data for AD7609BSTZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7609BSTZ-RL | AD7606BSTZ | AD7608BSTZ |
|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 bit | 18 bit | 16 bit | 18 bit |
| Number of Channels | 8 | 8 | 8 | 8 |
| Sampling Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Input Type | Differential | Differential | Differential | Differential |
| Interface | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
Key Differentiators
- 18-bit resolution with no missing codes (vs AD7606BSTZ)
- True differential inputs with Β±10 V range (vs AD7608BSTZ)
- Integrated antialiasing filter and reference (vs AD7606BSTZ)
Design Notes
Decouple the AVCC and DVCC pins with 10 Β΅F and 0.1 Β΅F capacitors placed as close to the pins as possible. Use separate analog and digital ground planes to minimize noise coupling. The AVCC supply should be clean and regulated; a low-dropout regulator is recommended. The DVCC can be tied to the same 5 V supply or a lower voltage (2.3 V to 5.25 V) to interface with different logic levels.
For optimal performance, route the analog input traces as differential pairs with proper grounding. Keep the analog input traces short and away from digital traces to reduce crosstalk. The REFIN/REFOUT pin should be bypassed with a 1 Β΅F capacitor. The exposed pad (if present) should be soldered to the ground plane for thermal and electrical performance.
Ensure the input voltage does not exceed the absolute maximum ratings (Β±16.5 V) even though the clamp protection is present. The RANGE pin must be set correctly for the desired input range (Β±5 V or Β±10 V). When using the parallel interface, ensure the timing requirements are met to avoid data corruption. The CONVST pins should be triggered simultaneously for true simultaneous sampling.
Compliance Information
RoHS compliant per DigiKey listing. No AEC-Q100 qualification for this industrial part.