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USB-7202
Specifications
Revision 1.1, October, 2009
© Copyright 2009, Measurement Computing Corporation
Specifications
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input section
Table 1. Analog input specifications
Parameter
Conditions
A/D converter type
Number of channels
Input configuration
Sampling method
Absolute maximum input voltage
Input impedance
Input ranges
Sampling rate
Throughput
Specification
CHx IN to GND
Software selectable
Scan to PC memory
Burst scan to 32 k sample FIFO
Software paced
Scan to PC memory (Note 1)
BURSTIO scan to 32 k Sample FIFO
Resolution
No missing codes
Crosstalk
Trigger source
Calibration
Note 1:
Signal DC-25 KHz
Software selectable
16-bit successive approximation type
8 single-ended
Individual A/D per channel
Simultaneous
±15 V maximum
100 MOhm minimum
±10 V, ±5 V, ±2 V, ±1 V
0.6 S/s to 50 kS/s, software programmable
20 S/s to 50 kS/s, software programmable
500 S/s all channels, system-dependent
(100 kS/s) / (# of channels); maximum of
50 kS/s for any channel
= (200 kS/s) / (# of channels), maximum of
50 kS/s for any channel
16 bits
15 bits
-80 dB
External digital: TRIG_IN
Cal factors stored in firmware. Cal factors
must be applied to data via application
software.
Maximum throughput scanning to PC memory is machine dependent.
Table 2. Calibrated absolute accuracy
Range
Accuracy (mV)
±10 V
±5 V
±2 V
±1 V
5.66
2.98
1.31
0.68
Table 3. Accuracy components - All values are (±)
Range
% of Reading
Gain error at FS (mV)
Offset (mV)
±10 V
±5 V
±2 V
±1 V
0.04
0.04
0.04
0.04
4.00
2.00
0.80
0.40
1.66
0.98
0.51
0.28
Table 4 summarizes the noise performance for the USB-7202. Noise distribution is determined by gathering
50 K samples with inputs tied to ground at the user connector. Samples are gathered at the maximum specified
sampling rate of 50 kS/s.
2
USB-7202
Specifications
Table 4. Noise performance
Range
Typical counts
LSBrms
±10 V
±5 V
±2 V
±1 V
10
10
11
14
1.52
1.52
1.67
2.12
Digital input/output
Table 5. Digital I/O specifications
Parameter
Specification
Digital type
Number of I/O
Configuration
Pull-up/pull-down configuration
Input high voltage
Input low voltage
Output high voltage (IOH = –2.5 mA)
Output low voltage (IOL = 2.5 mA)
Power on and reset state
CMOS
8 (DIO0 through DIO7)
Independently configured for input or output
All pins configurable via jumper (JP1) to Vs or Ground via 47 K resistors.
2.0 V minimum, 5.5 V absolute maximum
0.8 V maximum, –0.5 V absolute minimum
3.8 V minimum
0.7 V maximum
Input
External trigger
Table 6. External trigger specifications
Parameter
Conditions
Specification
Trigger source (Note 2)
Trigger mode
External digital
Software selectable
TRIG_IN
Edge sensitive: user configurable for CMOS
compatible rising or falling edge.
10 µs maximum
1µs minimum
4.0 V minimum, 5.5 V absolute maximum
1.0 V maximum, –0.5 V absolute minimum
±1.0µA
Trigger latency
Trigger pulse width
Input high voltage
Input low voltage
Input leakage current
Note 2:
TRIG_IN is a Schmitt trigger input protected with a 1.5K Ohm series resistor.
3
USB-7202
Specifications
External clock input/output
Table 7. External clock I/O specifications
Parameter
Conditions
Pin name
Pin type
Software selectable direction
Input clock rate
Clock pulse width
Input leakage current
Input high voltage
Input low voltage
Output high voltage (Note 3)
Output low voltage (Note 3)
Note 3:
Specification
SYNC
Bidirectional
Outputs internal A/D pacer clock.
Receives A/D pacer clock from external source.
50 kHz, maximum
1µs minimum
5µs minimum
±1.0µA
4.0 V minimum, 5.5 V absolute maximum
1.0 V maximum, –0.5 V absolute minimum
3.3 V minimum
3.8 V minimum
1.1 V maximum
0.6 V maximum
Output
Input
Input
Output
IOH = –2.5 mA
No load
IOL = 2.5 mA
No Load
SYNC is a Schmitt trigger input and is over-current protected with a 1.5 kOhm series resistor.
Counter section
Table 8. Counter specifications
Parameter
Specification
Pin name (Note 4)
Counter type
Number of channels
Input type
Input source
Resolution
Schmidt trigger hysteresis
Input leakage current
Maximum input frequency
High pulse width
Low pulse width
Input high voltage
Input low voltage
CTR
Event counter
1
TTL, rising edge triggered
CTR screw terminal
32 bits
20 mV to 100 mV
±1µA
1 MHz
500 ns minimum
500 ns minimum
4.0 V minimum, 5.5 V absolute maximum
1.0 V maximum, –0.5 V absolute minimum
Note 4:
CTR is a Schmitt trigger input protected with a 1.5K Ohm series resistor.
Memory
Table 9. Memory specifications
Parameter
Specification
Data FIFO
EEPROM
EEPROM configuration
32,768 samples, 65,536 bytes
1,024 bytes
Address range
Access
Description
0x000-0x1FF
0x200-0x3FF
Reserved
Read/write
512 bytes system and Cal data
512 bytes user area
4
USB-7202
Specifications
Microcontroller
Table 10. Microcontroller specifications
Parameter
Specification
Type
Program memory
Data memory
High performance 8-bit RISC microcontroller
32,768 words
3,936 bytes
Indicator LEDs
Table 11. Indicator LED specifications
Parameter
Specification
Power LED (top)
Status LED
OEM power
Indicates that the device’s microcontroller has power and is configured.
Blinks to indicate USB communications.
OEM Connector; LED sink current up to 5 mA per LED @ 5 Vmax
Power
Table 12. Power specifications
Parameter
Conditions
Specification
Supply current
USB enumeration
Continuous mode
 Connected to self-powered hub
 Connected to externally-powered root port hub
< 100 mA
150 mA (Note 5)
4.5 V minimum, 5.25 V maximum
+5 VUSER power available
(Note 6)
Output current (Note 7)
Fuse F1, (F4 spare)
Fuse F2, (F3 spare)
Note 5:
Note 6:
Note 7:
350 mA maximum
0452.500 - Littelfuse 0.5A NANO2® Slo-Blo® Subminiature Surface Mount Fuse
0452.375 - Littelfuse 0.375A NANO2® Slo-Blo® Subminiature Surface Mount Fuse
This is the total current requirement for the USB-7202, which includes up to 10 mA for the status
LED.
"Self-powered hub" refers to a USB hub with an external power supply. Self-powered hubs allow a
connected USB device to draw up to 500 mA. "Root port hubs" reside in the PC’s USB host
Controller. The USB port(s) on your PC are root port hubs. All externally-powered root port hubs
(desktop PC’s) provide up to 500 mA of current for a USB device. Battery-powered root port hubs
provide 100 mA or 500 mA, depending upon the manufacturer. A laptop PC that is not connected to
an external power adapter is an example of a battery-powered root port hub. If your laptop PC is
constrained to the 100 mA maximum, you need to purchase a self-powered hub.
This is the total amount of current that can be sourced from the +5 VUSER and digital outputs. Fuse
for +5V terminal is rated at 375 mA.
5
USB-7202
Specifications
General
Table 13. General specifications
Parameter
Specification
Device type
Device compatibility
DEFAULTS for
programmable options and
"DEV:RESET/DEFAULT"
message
USB 2.0 (full-speed)
USB 1.1, USB 2.0
AInScan
Low channel = 0
High channel = 0
Samples = 1000
Rate = 1000
Range = ±10 V
Pacer = Disabled (Slave)
Transfer mode = BlockIO
Trigger = Disabled
Status = Idle
AITrig
Trigger polarity = Rising
CTR
Value = 0
Environmental
Table 14. Environmental specifications
Parameter
Specification
Operating temperature range
Storage temperature range
Humidity
0 to 70 °C
-40 to 70 °C
0 to 90% non-condensing
Mechanical
Table 15. Mechanical specifications
Parameter
Specification
Dimensions
3.55" (L) x 3.75" (W) x 0.5" (H)
4.40" (L) with detachable screw terminals connected
3 meters maximum
3 meters maximum
USB cable length
User connection length
6
USB-7202
Specifications
Main connector and pin out
Table 16. Main connector specifications
Parameter
Specification
Connector type
Wire gauge range
Detachable screw terminal
16 AWG to 30 AWG
Table 17. Main connector pin out
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal Name
CH0 IN
AGND
CH1 IN
AGND
CH2 IN
AGND
CH3 IN
AGND
CH4 IN
AGND
CH5 IN
AGND
CH6 IN
AGND
CH7 IN
AGND
N/C (do not connect anything to this pin)
AGND
AGND
AGND
Pin
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
7
Signal Name
DIO0
GND
DIO1
GND
DIO2
GND
DIO3
GND
DIO4
GND
DIO5
GND
DIO6
GND
DIO7
SYNC
TRIG_IN
CTR
+5VUSER output
GND
USB-7202
Specifications
OEM connector and pin out (P4)
Table 18. OEM connector specifications
Parameter
Specification
Connector type
10 position 0.1" box header
Table 19. OEM connector pin out
Pin
1
3
5
7
9
Signal Name
N/C
N/C
N/C (do not connect anything to this pin)
N/C (do not connect anything to this pin)
N/C (do not connect anything to this pin)
Pin
2
4
6
8
10
Signal Name
VBUS (fuse protected)
DD+
GND
SHIELD
Trigger/Sync connector and pin out (P5)
Table 20. Trigger/Sync connector specifications
Parameter
Specification
Connector type
10 position 0.1" box header
Table 21. Trigger/Sync connector pin out
Pin
1
3
5
7
9
Signal Name
TRIG_IN
N/C
SYNC
N/C
N/C
Pin
2
4
6
8
10
8
Signal Name
GND
GND
GND
GND
N/C
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail: [email protected]
www.mccdaq.com
USB-7202-spec.docx

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