Description
The ADS8556/7/8 contain six low-power, 16-, 14-, or 12-bit, successive approximation register (SAR) based analog-to-digital converters (ADCs) with true bipolar inputs. Each channel contains a sample-and-hold circuit that allows simultaneous high-speed multi-channel signal acquisition.
The ADS8556/7/8 support data rates of up to 730kSPS in parallel interface mode or up to 500kSPS if the serial interface is used. The bus width of the parallel interface can be set to eight or 16 bits. In serial mode, up to three output channels can be activated.
The ADS8556/7/8 is specified over the full industrial temperature range of -40°C to +125°C and is available in an LQFP-64 package.
Features
- Family of 16-, 14-, 12-Bit, Pin- and Software-Compatible ADCs
- Six SAR ADCs Grouped in Three Pairs
- Maximum Data Rate Per Channel with Internal Conversion Clock and Reference:
ADS8556: 630kSPS (PAR) or 450kSPS (SER)
ADS8557: 670kSPS (PAR) or 470kSPS (SER)
ADS8558: 730kSPS (PAR) or 500kSPS (SER)
- Maximum Data Rate with External Conversion Clock and Reference:
800kSPS (PAR) or 530kSPS (SER)
- Pin-Selectable or Programmable Input Voltage Ranges: Up to ±12V
- Excellent Signal-to-Noise Performance:
91.5dB (ADS8556)
85dB (ADS8557)
73.9dB (ADS8558)
- Programmable and Buffered Internal Reference: 0.5V to 2.5V and 0.5V to 3.0V
- Comprehensive Power-Down Modes:
Deep Power-Down (Standby Mode)
Partial Power-Down
Auto-Nap Power-Down
- Selectable Parallel or Serial Interface
- Operating Temperature Range: -40°C to +125°C
- LQFP-64 Package
- APPLICATIONS
- Power Quality Measurement
- Protection Relays
- Multi-Axis Motor Control
- Programmable Logic Controllers
- Industrial Data Acquisition
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Parametrics
| |
ADS8556 |
ADS8557 |
ADS8558 |
| Resolution(Bits) |
16 |
14 |
12 |
| Sample Rate (max) |
630kSPS |
670kSPS |
730kSPS |
| # Input Channels |
6 |
6 |
6 |
| Interface |
Parallel, Serial SPI Interface |
Parallel, Serial SPI Interface |
Parallel, Serial SPI Interface |
| INL(Max)(+/-LSB) |
4 |
1 |
0.75 |
| SNR(dB) |
91.5 |
85 |
73.9 |
| Power Consumption(Typ)(mW) |
251.7 |
253.2 |
262.2 |
| Architecture |
SAR |
SAR |
SAR |
| Analog Voltage AV/DD(Min)(V) |
4.5 |
4.5 |
4.5 |
| Analog Voltage AV/DD(Max)(V) |
5.5 |
5.5 |
5.5 |
| Operating Temperature Range(°C) |
-40 to 125 |
-40 to 125 |
-40 to 125 |
| Digital Supply(Min)(V) |
2.7 |
2.7 |
2.7 |
| Digital Supply(Max)(V) |
5.5 |
5.5 |
5.5 |
|
