| Technical specifications |
| Analog Output |
| Resolution: | 12-bits, 1 in 4,096 |
| Output range | 0 V to 2.5 V |
| Number of channels | 2 |
| Throughput (software paced) | 10 S/s single channel type |
| USB operation | Initializes to 000h code |
| Bluetooth operation | The outputs can be individually configured to initialize to 000h or to have user-configurable values written to the outputs when the Bluetooth host device is connected or disconnected. |
| Output current drive (each D/A OUT) | 5 mA source capability |
| Slew rate | 0.75 V/ µs typ |
| Analog Output Accuracy |
| All values are (±) accuracy tested at no load Range | 0 V to 2.5 V |
| Accuracy (LSB) | 8.0 typ, 73.0 max |
| Analog Output Accuracy Components (All Values are (±)) |
| Range | 0 V to 2.5 V |
| % of Reading | 0.16 typ, 1.44 max |
| Gain error at full scale | 4.0 mV typ, 36.0 mV max |
| Offset | 1.0 mV typ, 9.0 mV max
Zero-scale offsets may result in a fixed zero-scale error producing a dead-band digital input code region. In this case, changes in digital input code at values less than 0x040 may not produce a corresponding change in the output volt-age. The offset error is tested and specified at code 0x040. |
| Accuracy at full scale | 5.0 mV typ, 45.0 mV max |
| Digital Input/Output |
| Digital type | 3.3 V open drain |
| Output value mapping | 0 written Output drives to DGND
1 written Output is pulled up to 3.3 V by internal resistor |
| Number of I/O | 8 |
| Configuration | Individually configurable |
| Input voltage range | 0 V to 5.5 V Each transistor source pin is internally connected to DGND Pull up/pull-down configuration:47.5 kO pull-up resistors (to 3.3 V), 2.2 kOseries resistors |
| Input high voltage threshold | 2.0 V min |
| Input high voltage limit | 5.5 V absolute max |
| Input low voltage threshold | 0.8 V max |
| Input Low voltage limit | –0.5 V absolute min, 0 V recommended min |
| Output Voltage range | 0 V to 3.3 V (no external pull up resistor), 0 V to 5.5 V max The external pull-up is connected to the digital output bit through an external pull-up resistor. Adding an external pull-up resistor connects it in parallel with the internal 47.5 kO pull-up resistor of that particular digital input/output bit. Careful consideration should be made when considering the external pull-up resistor value and the resultant pull-up voltage produced at the load. |
| Output off state leakage current | 1.0 µA typ Does not include the additional leakage current contribution through the internal or any external pull-up resistor. |
| Sink Current capability | 50 mA max (continuous) per pin |
| Transistor on resistance | 0.7 O max |
| Power on and reset state | USB operation: All input
Bluetooth operation: The digital I/O can either be all input at power on/reset or may be configured to have user-configurable patterns written to the DIO when the Bluetooth host is connected or disconnected. Each transistor source pin is internally connected to DGND. |
| External Trigger |
| Trigger source | External digital; TRIG terminal |
| Trigger mode | Software configurable for edge or level sensitive, rising or falling edge, high or low level. |
| Trigger latency | 10 µs max |
| Trigger pulse width | 1 µs min |
| Input type | Schmitt trigger, 47 kO pull-down to ground |
| Schmitt trigger hysteresis | 0.76 V typ, 0.4 V min, 1.2 V maxInput high voltage threshold:1.74 V typ, 1.3 V min, 2.2 V max |
| Input high voltage limit | 5.5 V absolute max |
| Input low voltage threshold | 0.98 V typ, 0.6 V min, 1.5 V max |
| Input low voltage limit | –0.5 V absolute min, 0 V recommended min |
| External Clock Input |
| Terminal name | AICKI |
| Terminal type | Input |
| Input clock rate | 50 kHz, max |
| Clock pulse width | 1 µs min |
| Input type | Schmitt trigger, 47 kO pull-down to ground |
| Schmitt trigger hysteresis | 0.76 V typ, 0.4 V min, 1.2 V max |
| Input high voltage threshold | 1.74 V typ, 1.3 V min, 2.2 V max |
| Input high voltage limit | 5.5 V absolute max |
| Input low voltage threshold | 0.98 V typ, 0.6 V min, 1.5 V max |
| Input low voltage limit | –0.5 V absolute min, 0 V recommended min |
| Counter |
| Pin name | CTR |
| Counter type | Event counter |
| Number of channels | 1 |
| Input type | Schmitt trigger, 47 kO pull-down to ground, rising edge triggered |
| Input source | CTR screw terminal |
| Resolution | 32 bits |
| Maximum input frequency | 1 MHz |
| High pulse width | 500 ns min |
| Low pulse width | 500 ns min |
| Schmitt trigger hysteresis | 0.76 V typ, 0.4 V min, 1.2 V max |
| Input high voltage threshold | 1.74 V typ, 1.3 V min, 2.2 V max |
| Input high voltage limit | 5.5 V absolute max |
| Input low voltage threshold | 0.98 V typ, 0.6 V min, 1.5 V max |
| Input low voltage limit | –0.5 V absolute min, 0 V recommended min |
| Memory |
| FIFO | 12K (12,288) samples |
| Non-volatile EEPROM | 2,048 bytes (768 bytes calibration, 256 bytes user, 1,024 bytes firmware use) |
| Microcontroller |
| Type | High performance 16-bit RISC microcontroller |
| Power |
Supply current, USB Source
During enumeration | < 100 mA |
| After USB enumeration or connected to USB charger/supply | < 500 mA |
| Battery power | Two AA cells; alkaline, NiCd, and NiMH cells supported |
| Battery charging | NiMH and NiCd charging supported. Alkaline cells automati-cally detected and not charged.When operating from batteries, there is a user configurable power-off timer that will turn the device off when there is no host connection for the speci-fied amount of time. The timer can be disabled or set to a value from 1 – 255 minutes. |
| +VO power available (after USB enumeration or Bluetooth connection) | 3.3 V nominal |
| +VO output current (after USB enumeration or Bluetooth connection) | 50 mA max |
| Bluetooth |
| Device type | Bluetooth 2.1 |
| Device compatibility | Backwards compatible with Bluetooth 2.0, 1.2, and 1.1 |
| Bluetooth profile | Serial Port Profile (SPP) |
| Radio range | Class II, 10 m typ |
| USB |
| Device type | USB 2.0 full speed |
| Device compatibility | USB 1.1, USB 2.0 |
| Environmental |
| Operating temperature range | 0 °C to 50 °C (32 °F to 122 °F) |
| Storage temperature range | –40 °C to 70 °C (–40 °F to 158 °F) |
| Humidity | 0% to 90% non-condensing |
| Mechanical |
| Dimensions (L × W × H)BTH-1208LS | 146.56 × 81.31 × 27.18 mm (5.77 × 3.28 × 1.07 in.) |
| BTH-1208LS-OEM (PCB dimensions) | 99.06 × 68.58 × 14.61 mm(3.90 × 2.70 × 0.58 in.) |
| USB cable length | 3 m (9.84 ft) max |
| User connection length | 3 m (9.84 ft) max |
| Signal Connector |
| Connector type | BTH-1208LS: Screw terminal
BTH-1208LS-OEM: Three 2 × 8 pin, 0.1 in. pitch headers |
| Wire gauge range | 16 AWG to 30 AWG |
