AD7685 16-Bit, 250 kSPS PulSAR® ADC in MSOP/QFN
The AD7685 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 part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage.
Power dissipation 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 or 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 AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Medical instruments
- Mobile communications
- Personal digital assistants (PDAs)
- Data acquisition
- Instrumentation
- Process controls
Features and Benefits- 16-bit resolution with no missing codes
- Throughput: 250 kSPS
- INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
- SINAD: 93.5 dB @ 20 kHz
- THD: −110 dB @ 20 kHz
- Pseudo differential analog input range 0 V to VREF with VREF up to VDD
- No pipeline delay
- Single-supply operation 2.3 V to 5.5 V with 1.8 V to 5 V logic interface
- Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
- Daisy-chain multiple ADCs, BUSY indicator
- Power dissipation
1.4 μW @ 2.5 V/100 SPS
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS - Standby current: 1 nA
| AD7685 IBIS Models
Reference Designs |
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 |
|---|
| AD7685ACPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 6.58 | Y |
| AD7685ARMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 7.28 | 6.58 | Y |
| AD7685ARMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 6.58 | Y |
| AD7685BCPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 8.1 | Y |
| AD7685BRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 8.96 | 8.1 | Y |
| AD7685BRMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 8.1 | Y |
| AD7685CCPZRL Last Time Buy | 10 ld LFCSP (3x3mm) | REEL 5000 | -40 to 85C | 0 | 9.72 | Y |
| AD7685CCPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 9.72 | Y |
| AD7685CRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 10.75 | 9.72 | Y |
| AD7685CRMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 9.72 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD7685-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7685SDZ | Evaluation Board SDP Interface | 99 | 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-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
