AD7688 500 kSPS 16- BIT Differential PulSAR® A/D Converter in µSOIC/QFN
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.
Battery Powered Equipment
Medical instruments
Mobile communications
Personal digital assistants
Data Acquisition
Instrumentation
Medical Instruments
Process Control
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
Features and Benefits- 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
| AD7685 IBIS Models
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Data Sheets
Application Notes
User Guides
Product Highlight
Technical Books
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD7688BCPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 16.25 | Y |
| AD7688BRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 19.18 | 16.25 | Y |
| AD7688BRMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 16.25 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD7685-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7686-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7687-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7688-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7688SDZ | Evaluation Board SDP Interface | 99 | Y |
| EVAL-AD7690-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7691-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7693-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7942-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7946-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7980-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7982-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7983-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7984-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7988-1-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7988-5-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-SDP-CB1Z | Evaluation Controller Board SDP | 99 | Y |
| SDP-PMD-IB1Z | Evaluation Interposer Board PMOD to SDP w/ Power Supply | 55 | Y |
Reference Materials
