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[ Analog Devices EVAL‑AD7687SDZ Evaluation Board for the AD7687 PulSAR ADC ]
ABOUT THIS ITEM
UI: [ V003104 ]
**[ New ]**
INCLUDES: [Development Tool]
FEATURED DESCRIPTION:
📘 EVAL‑AD7687SDZ — Technical Specifications
🧩 What the Board Evaluates
ADC Device: AD7687
Resolution: 16‑bit
Max Throughput: 250 kSPS
Architecture: SAR (Successive Approximation Register)
Input Type: Differential (true differential analog input)
Interface: SPI-compatible serial interface
🔧 Hardware Features
Analog Front End
Differential input signal path optimized for the AD7687
Input driver circuitry included for best dynamic performance
On‑board reference and buffer options
Configurable input ranges depending on reference selection
Clocking & Control
Uses the SDP-B/SDP-S controller board (via 120‑pin connector)
SPI interface handled through the SDP board and PC software
Power
Powered through the SDP connector
On‑board regulators generate required ADC supply rails
Typical supply:
VDD: 2.7 V to 5.5 V
VREF: 2.5 V (default), configurable
Output
Serial data output via SPI
Supports daisy‑chain or standalone readout
🖥️ Software Support
ACE (Analog Devices Analysis | Control | Evaluation) software
Provides:
Real‑time sampling
FFT analysis
Time‑domain plots
Register configuration
Data export
📐 Performance Characteristics (AD7687 Device)
These are the ADC’s internal specs, which the eval board exposes:
Parameter Value
Resolution 16 bits
Throughput 250 kSPS
INL ±0.6 LSB typical
DNL ±0.25 LSB typical
SNR ~91 dB (typical)
THD –105 dB (typical)
Input Type Differential
Input Range ±VREF
Reference External or internal buffer options
Power Consumption ~3 mW at 250 kSPS
🛠️ Included on the Evaluation Board
AD7687 ADC
Precision reference (ADR series depending on revision)
Input driver amplifier
Low‑noise regulators
Test points for:
Analog input
Reference
Supplies
Digital interface signals
📘 AD7687 — 16‑Bit, 250 kSPS Differential SAR ADC (IC Specifications)
🧩 Core Converter Specs
Parameter Specification
Resolution 16 bits
Architecture SAR (Successive Approximation Register)
Max Sample Rate 250 kSPS
Input Type True differential
Input Range ±VREF
Input Impedance >1 GΩ (sampling capacitor input)
Latency No pipeline latency (SAR)
⚡ Electrical Characteristics
Analog Input
Differential input: IN+ and IN−
Input range: ±VREF
Input common‑mode: 0.1 V to VDD – 0.1 V
Sampling capacitor: ~30 pF
Reference
External reference required
Typical reference voltage: 2.5 V
Reference input current: ~50 µA
Power Supplies
Supply Voltage
VDD 2.7 V to 5.5 V
VIO (digital I/O) 1.8 V to VDD
Power Consumption ~3 mW at 250 kSPS
📊 Dynamic Performance
Parameter Typical Value
SNR ~91 dB
SINAD ~90 dB
THD –105 dB
SFDR 105 dB
INL ±0.6 LSB
DNL ±0.25 LSB (no missing codes)
🖧 Digital Interface
SPI-compatible serial interface
Modes:
CS mode (standard SPI)
Chain mode (daisy‑chain multiple ADCs)
Supports:
Read during conversion
Read after conversion
⏱️ Timing
Conversion time: 3.2 µs
Acquisition time: 1.5 µs
Throughput: 250 kSPS max
🧪 What the EVAL‑AD7687SDZ Adds
If you want the board specs (not just the IC), here’s what the evaluation board includes:
Precision reference (ADR series)
Input driver amplifier
Low‑noise regulators
Test points for analog/digital signals
120‑pin SDP connector for USB control
ACE software support
Delivery Details:
WE DO NOT SHIP INTERNATIONALLY! UNITED STATES SHIPMENT ONLY. We try our best to ship order after payment is received. Order placed on weekends or holiday will be shipped on Monday or next business day. We will ONLY ship the item to your eBay Confirmed Address, so please confirm that your delivery address is correct before you place an order. Address cannot be changed after an order has been sent. We ship out next day if item is purchase and paid for before 1:45 pm Central. Otherwise, will be shipped out next day. We are closed on the weekends and Holidays, so no shipping nor customer service are available. For all LOCAL PICKUP, guest must schedule an appointment prior to pick up. Order value of $300.00 or more will require a signature to receive package to prevent loss of package. Please arrange someone to be available.