AD7688
PRODUCTION500 kSPS 16- BIT Differential PulSAR® A/D Converter in µSOIC/QFN
- Part Models
- 3
- 1ku List Price
- Starting From $20.60
Part Details
- 16 Bits Resolution with No Missing 16-Bit Codes
- Throughput: 500 kSPS
- INL: ±0.4 LSB Typ, ±1.5 LSB Max
- S/(N+D): 95 dB @ 20 kHz
- Power Dissipation:
4 mW @ 100 kSPS
4 µW @ 100 SPS - True Differential Analog input range: ±VREF 0 V to VREF with VREF up to VDD on Both Inputs
- No Pipeline Delay
- Single Supply 5V Operation with 1.8V to 5 V Logic Interface
- Multiple ADCs Daisy Chain, with BUSY Indicator
- Serial Interface SPI/QSPI/Wire/DSP compatible
- µSOIC Package (µSO8 Size) and 3 mm by 3 mm QFN (LFCSP) (SOT23 size)
- Pin-to-Pin Compatible with the AD7685, AD7686, AD7687
The AD7688 is a 16-bit, 500 kSPS, charge redistribution successive-approximation Analog-to-Digital Converter which operates from a single 5V power supply, VDD. It contains a very low power high-speed 16-bit sampling ADC with no missing codes, an internal conversion clock and a versatile serial interface port. The part also contains a low noise, wide bandwidth, very short aperture delay track/hold circuit. On the CNV rising edge, it samples the voltage difference between IN+ and IN- pins. The voltages on these pins usually swing in opposite phase between 0 V to REF. The reference voltage REF is applied externally and can be set up to the supply voltage.
Its power scales linearly with throughput.
The SPI compatible serial interface also features the ability, using the SDI input, to “Daisy chain” several ADCs on a single 3 wire bus and provides an optional Busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V or 5 V logic using the separate supply VIO.
The AD7688 is housed in a 10-lead µSOIC or 10-lead QFN (Chip Scale package) with operation
APPLICATIONS
- Battery Powered Equipment
- Medical instruments
- Mobile communications
- Personal digital assistants
- Data Acquisition
- Instrumentation
- Medical Instruments
- Process Control
Documentation
Data Sheet 1
User Guide 2
Application Note 1
Technical Articles 1
Product Highlight 2
Tested Product Combinations 1
Tutorial 2
Product Highlight 2
Product Selection Guide 1
Technical Book 1
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7688BCPZRL7 | 10-Lead LFCSP (3mm x 3mm) | ||
| AD7688BRMZ | 10-Lead MSOP | ||
| AD7688BRMZRL7 | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 20, 2024 - 23_0143 Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process |
||
| AD7688BCPZRL7 | PRODUCTION | |
| AD7688BRMZ | PRODUCTION | |
| AD7688BRMZRL7 | PRODUCTION | |
|
Jul 5, 2022 - 21_0271 Qualification of an Alternate Adhesive Material and Molding Compound for Select LFCSP Packages |
||
| AD7688BCPZRL7 | PRODUCTION | |
|
Oct 18, 2016 - 16_0036 Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products |
||
| AD7688BCPZRL7 | PRODUCTION | |
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| AD7688BRMZ | PRODUCTION | |
| AD7688BRMZRL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Low Input Bias Current Op Amps (≤100 pA) 2 | ||
| ADA4627-1 | PRODUCTION | 36 V, 19 MHz, Low Noise, Low Bias Current, JFET Op Amp |
| ADA4637-1 | PRODUCTION | 30 V, 80 MHz, Low Noise, Low Bias Current, JFET Op Amp |
| Low Noise Op Amps (≤ 10nV/√Hz) 3 | ||
| ADA4897-1 | RECOMMENDED FOR NEW DESIGNS | 1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
| AD8615 | PRODUCTION |
Precision 20 MHz CMOS Single RRIO Operational Amplifier |
| ADA4896-2 | RECOMMENDED FOR NEW DESIGNS | 1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
| Low Power Op Amps (≤ 1mA/amp) 1 | ||
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 3 | ||
| AD8021 | PRODUCTION | Low Noise, High Speed Amplifier for 16-Bit Systems |
| AD8605 | PRODUCTION | Precision, Low Noise, CMOS, RRIO Op Amp (single) |
| ADA4841-1 | PRODUCTION | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| Series Voltage References 4 | ||
| ADR4525 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 2.5V Voltage Reference |
| ADR391 | PRODUCTION | 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
| ADR435 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR4550 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference |
| Standard Digital Isolators 4 | ||
| ADUM4401 | PRODUCTION |
5 kV RMS Quad-Channel Digital Isolators |
| ADUM3481 | PRODUCTION | Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality) |
| ADUM3401 | PRODUCTION | Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability |
| ADUM1401 | PRODUCTION | Quad-Channel Digital Isolator (3/1 Channel Directionality) |
Tools & Simulations
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
Open ToolAD7685 IBIS Models 1
Evaluation Kits
16-Bit, 500 kSPS PulSAR® ADC PMOD Evaluation Board
Resources
Software
AD7688 Evaluation Board