AD7946 14-Bit, 500 kSPS PulSAR® ADC in MSOP
Applications
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
The AD7946 is a 14-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 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.
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 AD7946 is housed in a 10-lead µSOIC or 10-lead QFN (LFCSP) with operation specified from –40°C to +85°C.
Applications
- Battery-powered equipment
- Data acquisition
- Instrumentation
- Medical instruments
- Process control
Features and Benefits- 14-bit resolution with no missing codes
- Throughput: 500 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 REF with REF up to VDD
- No pipeline delay
- Single-supply 5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface - 1.8 V/2.5 V/3 V/5 V logic interface
- Serial interface, SPI/QSPI/MICROWIRE™/DSP compatible
- Daisy-chain multiple ADCs and BUSY indicator
- Power dissipation 3.3 mW @ 5 V/100 kSPS 3.3 μW @ 5 V/100 SPS
| 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 |
|---|
| AD7946BCPZRL7 Last Time Buy | 10 ld LFCSP (3x3mm) | REEL 1500 | -40 to 85C | 0 | 7.46 | Y |
| AD7946BRMZ Production | 10 ld MSOP | OTH 50 | -40 to 85C | 10.19 | 9.1 | Y |
| AD7946BRMZRL7 Production | 10 ld MSOP | REEL 1000 | -40 to 85C | 0 | 9.1 | 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-AD7946-PMDZ | Evaluation Board PMOD compatible form factor | 27 | Y |
| EVAL-AD7946SDZ | Evaluation Board SDP Interface | 99 | 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 | 99 | Y |
| SDP-PMD-IB1Z | Evaluation Interposer Board PMOD to SDP w/ Power Supply | 55 | Y |
Reference Materials
