具有串行接口的低功耗、12 位、2 通道、1MHz 单/双路单极输入 ADC
| Resolution (Bits) | 12 |
| Number of input channels | 2 |
| Sample rate (Max) (kSPS) | 1000 |
| Interface type | SPI |
| Architecture | SAR |
| Input type | Single-Ended |
| Multi-channel configuration | Multiplexed |
| Rating | Catalog |
| Reference mode | Ext |
| Input range (Max) (V) | 5.5 |
| Input range (Min) (V) | 0 |
| Features | Daisy-Chainable, Oscillator |
| Operating temperature range (C) | -40 to 85 |
| Power consumption (Typ) (mW) | 13.7 |
| Analog voltage AVDD (Min) (V) | 2.7 |
| SNR (dB) | 73.9 |
| Analog voltage AVDD (Max) (V) | 5.5 |
| INL (Max) (+/-LSB) | 0.5 |
| Digital supply (Min) (V) | 1.65 |
| Digital supply (Max) (V) | 5.5 |
- 2.7V to 5.5V Analog Supply, Low Power:
- 13.7mW (1MHz, +VA = 3V, +VBD = 1.8V)
- 1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,
900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V - Excellent DC Performance:
- ±0.15LSB Typ, ±0.5LSB Max INL
- ±0.12LSB Typ, ±0.5LSB Max DNL
- ±0.8mV Max Offset Error at 3V
- ±1.25mV Max Offset Error at 5V
- Excellent AC Performance at fi = 10kHz with 73.9dB SNR, 93.4dB SFDR, -88.5dB THD
- Built-In Conversion Clock (CCLK)
- 1.65V to 5.5V I/O Supply:
- SPI/DSP-Compatible Serial Interface
- SCLK up to 50MHz
- Comprehensive Power-Down Modes:
- Deep Power-Down
- Nap Power-Down
- Auto Nap Power-Down
- Unipolar Input Range: 0V to VREF
- Software Reset
- Global CONVST (Independent of CS)
- Programmable Status/Polarity EOC/INT
- 4 × 4 QFN-16 and TSSOP-16 Packages
- Multi-Chip Daisy-Chain Mode
- Programmable TAG Bit Output
- Auto/Manual Channel Select Mode (ADS7230)
- APPLICATIONS
- Communications
- Transducer Interface
- Medical Instruments
- Magnetometers
- Industrial Process Control
- Data Acquisition Systems
- Automatic Test Equipment
SPI is a trademark of Motorola, Inc.
All other trademarks are the property of their respective owners
The ADS7229 is a low-power, 12-bit, 1MSPS analog-to-digital converter (ADC) with a unipolar input. The device includes a 12-bit capacitor-based successive approximation register (SAR) ADC with inherent sample-and-hold.
The ADS7230 is based on the same core and includes a 2-to-1 input MUX with a programmable TAG bit output option. Both the ADS7229 and ADS7230 offer a high-speed, wide voltage serial interface and are capable of daisy-chain mode operation when multiple converters are used.
These devices are available in 4 × 4 QFN and TSSOP-16 packages, and are fully specified for operation over the industrial -40°C to +85°C temperature range.
