AD7687 16-Bit, 1.5 LSB INL, 250 kSPS PulSAR™ Differential ADC in MSOP/QFN
The AD76871 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The device also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, the AD7687 the samples the voltage difference between IN+ and IN− pins, which can range from −VREF to +VREF. The reference voltage, VREF, is applied externally and can be set up to the supply voltage.
The power consumption of the device scales linearly with throughput.
The SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus and provides an optional BUSY indicator by means of the SDI pin. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO.
The AD7687 comes in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Data acquisitions
- Instrumentation
- Medical instruments
- Process controls
Features and Benefits- 16-bit resolution with no missing codes
- Throughput: 250 kSPS
- INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)
- Dynamic range: 96.5 dB
- SNR: 95.5 dB at 20 kHz
- THD: −118 dB at 20 kHz
- True differential analog input range
- No pipeline delay
- Single-supply 2.3 V to 5.5 V operation with 1.8 V/2.5 V/3 V/
5 V logic interface - Refer to data sheet for additional features.
| AD7685 IBIS Models
Reference Designs |
Data Sheets
Application Notes
User Guides
Product Highlight
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD7687BCPZ-R2 Production | LFCSP:LEADFRM CHIP SCALE | REEL 250 | -40 to 85C | 0 | 0 | Y |
| AD7687BCPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 11.05 | Y |
| AD7687BRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 12.37 | 11.05 | Y |
| AD7687BRMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 11.05 | 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-AD7687SDZ | Evaluation Board SDP Interface | 99 | Y |
| EVAL-AD7688-PMDZ | Evaluation Board PMOD compatible form factor | 27 | 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
