AD7942 14-Bit, 250 kSPS PulSAR®, Pseudo Differential ADC in MSOP/LFCSP
The AD7942 is a 14-bit, charge redistribution, successive approximation PulSAR® ADC that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 14-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 VREF with respect to a ground sense, IN−. The reference voltage, VREF, is applied externally and is set up to be the supply voltage. Its power scales linearly with the 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 a separate supply (VIO).
The AD7942 is housed in a 10-lead MSOP or a 10-lead LFCSP package yet fits in the same size footprint as the 8-lead MSOP or SOT-23. Operation for the AD7942 is specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Data acquisition
- Instrumentation
- Medical instruments
- Process controls
Features and Benefits- 14-bit resolution with no missing codes
- Throughput: 250 kSPS
- INL: ±0.4 LSB typical, ±1 LSB maximum (±0.0061% of FSR)
- SINAD: 85 dB @ 20 kHz
- THD: −100 dB @ 20 kHz
- Pseudo differential analog input range
0 V to VREF with VREF up to VDD - No pipeline delay
- See Data Sheet for Additional Information
| AD7685 IBIS Models
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Data Sheets
Application Notes
User Guides
Product Highlight
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD7942BCPZRL7 Production | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 5.87 | Y |
| AD7942BRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 6.99 | 5.87 | Y |
| AD7942BRMZ-RL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 5.87 | 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-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-AD7942SDZ | Evaluation Board SDP Interface | 99 | 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
