A-5 General Specs [T-Series Datasheet]
All specifications are at 25 °C and Vsupply = 5.0 V unless otherwise noted.
Power Supply Input
The following table shows the supply voltage that is required. The USB hub or 5V USB adapter in use should fall within the acceptable range.
Table A5-1.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Supply Voltage | - | 4.75 | - | 5.25 | Volts |
Supply Current | T4, No connected loads [1] | - | 210 | - | mA |
T7, No connected loads [1] | - | 280 | - | mA | |
T8, No connected loads, AIN active [1] | 670 | mA |
[1] With no connected loads, the supply current is just the "Power Consumption" from the tables below. The total supply current is this power consumption plus the current provided to any loads (e.g. out of VS terminals). Total supply current should be kept to 500 mA or less on the T4 and T7.
VS Outputs
The following table provides specifications for the VS outputs.
Table A5-2.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Voltage [1] | - | 4.75 | - | 5.25 | Volts |
Max Output Current [2] | T4 | - | 290 | - | mA |
T7 | - | 220 | - | mA | |
T8, DAC and REFO unused | 300 | mA | |||
T8, Both DACs outputting 20 mA | 150 | mA | |||
T8, Both DACs at 20 mA, RefO at 100 mA | 75 | mA |
[1] VS voltage is the same as the power supply voltage.
[2] The max total supply current is 500 mA, so the max current available from VS is 500 mA minus the power consumption of the device from the tables below.
Core Clock
The following table provides specifications for the core clock.
Table A5-3.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Clock Error | T4, T7 at ~ 25 °C | - | - | ±20 | ppm |
T4, T7 from -10 to 60 °C | - | - | ±50 | ppm | |
T4, T7 from -40 to 85 °C | - | - | ±100 | ppm | |
T8 from -20 to +75 ºC | - | - | 10 | ppm | |
T8 from -45 to +85 ºC | - | - | 30 | ppm | |
Nominal Core Clock Speed | T4 | - | 80 | - | MHz |
T7 | - | 80 | - | MHz | |
T8 | - | 200 | - | MHz |
Physical
Table A5-4.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
USB Cable Length | - | - | 2 | 5 | meters |
Operating Temperature [1] | - | -40 | - | 85 | °C |
Operating Humidity [2] | Non-Condensing | - | - | - | - |
Screw Terminal Wire Gauge | - | - | 26 | 14 | AWG |
Mounting Screws | wood screw sizes | #4 | #6 | #8 | - |
Enclosure Screws | PH1 pan head | - | #4-20 x 5/8" | - | Phil #1 |
[1] The device operates across this temperature range, but note that many specs in this appendix are specified at room temperature. In particular, analog input absolute accuracy specs are valid at room temperature, and beyond that there is a tempco that describes how readings might change with temperature.
[2] There is no specific limit on humidity, but the environment must be non-condensing. The T7 must be protected from moisture and particulates.
Power Consumption
At this time USB and Core speed are not intended for user level control, but have been included in the following table to show the capabilities of the device. The values shown are typical.
T4 Power Consumption
Table A5-5. T4 Power Consumption
Core Speed | Ethernet [1] | Ethernet Linked | LEDs | USB [1] | USB Linked | Draw (mA) | Typical Deviation (%) |
|---|---|---|---|---|---|---|---|
80M | ON | Yes | ON | ON | Yes | 210 | ±4 |
80M | ON | Yes | ON | ON | No | 195 | ±4 |
80M | ON | No | ON | ON | Yes | 170 | ±4 |
80M | ON | No | OFF | ON | Yes | 140 | ±10 |
[1] Ethernet and USB require that the core be running at least 20MHz.
T7 Power Consumption
Table A5-6. T7 Power Consumption
Core Speed | Ethernet [1] | Ethernet Linked | AINs | WiFi | WiFi Linked | LEDs | USB[1] | Draw (mA) | Typical Deviation (%) |
|---|---|---|---|---|---|---|---|---|---|
80M | ON | Yes | ON | ON | Yes | ON | ON | 280 | +/- 4 |
80M | ON | Yes | ON | ON | No | ON | ON | 280 | +/- 3 |
80M | ON | Yes | ON | OFF | No | ON | ON | 250 | +/- 4 |
80M | ON | No | ON | OFF | No | ON | ON | 200 | +/- 5 |
80M | OFF | No | ON | OFF | No | ON | ON | 170 | +/- 4 |
80M | OFF | No | OFF | OFF | No | ON | ON | 140 | +/- 4 |
80M | OFF | No | OFF | OFF | No | OFF | ON | 94 | +/- 11 |
80M | OFF | No | OFF | OFF | No | OFF | OFF | 86 | +/- 9 |
20M | OFF | No | OFF | OFF | No | OFF | OFF | 28 | +/- 18 |
2M | OFF | No | OFF | OFF | No | OFF | OFF | 10 | +/- 20 |
250k | OFF | No | OFF | OFF | No | OFF | OFF | 6 | +/- 33 |
[1] Ethernet and USB require that the core be running at least 20MHz.
T8 Power Consumption
The T8 has several switching power supplies which maintain the proper operating voltages. If the incoming voltage changes, the power supplies will change their current draw. This ensures constant voltage and power to the T8’s systems. The specs below were measured with Vs at 5.0 V.
Table A5-7. T8 Power Consumption
Core Speed (MHz) | Ethernet Linked | # AINs Enabled | DAC0 Sourcing (mA) | DAC1 Sourcing (mA) | REFO Sourcing (mA) | Draw (mA) | Typical Deviation (±%) |
|---|---|---|---|---|---|---|---|
100 | No | 8 | 0 | 0 | 0 | 670 | 4 |
100 | No | 0 | 0 | 0 | 0 | 302 | 5 |
100 | No | 8 | 20 | 0 | 0 | 765 | 5 |
100 | No | 8 | 0 | 20 | 0 | 765 | 5 |
100 | No | 8 | 20 | 20 | 0 | 872 | 5 |
100 | No | 8 | 0 | 0 | 100 | 766 | 5 |
100 | Yes | 8 | 0 | 0 | 0 | 695 | 5 |
Table A5-8.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Accuracy vs. Cal Value [1] | ~ 25 °C | - | ±0.1 | ±0.2 | % |
Accuracy vs. Nominal [1] | ~ 25 °C | - | - | ±5 | % |
Temperature Coefficient 200UA [2] | ~ 25 °C | - | - | - | ppm/°C |
Temperature Coefficient 10UA [2] | ~ 25 °C | - | - | - | ppm/°C |
Maximum Voltage | - | - | 2.0V less than VS | - | volts |
[1] First spec is the accuracy compared to the value stored during calibration. The second spec is the accuracy compared to the nominal value (e.g. 200.0 µA for the 200µA source).
[2] The temperature coefficient varies strongly with temperature. See the charts in 12.0 200uA and 10uA.
VM+ and VM- (T7)
Table A5-9.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Typical Voltage | No-load | - | ±13 | - | volts |
@ 2.5 mA | - | ±12 | - | volts | |
Maximum Current | - | - | 2.5 | - | mA |
3.3V RefOut (T8)
The 3.3V Reference output is a load compensated supply which is intended for bridge circuits etc.
Table A5-10.
Parameter | Condition | Min | Typical | Max | Units |
|---|---|---|---|---|---|
Voltage | - | 3.293 | 3.3 | 3.307 | V |
Current Regulation | - | 8 | 18 | 28 | µV/mA |
Maximum Current | - | - | 100 | - | mA |