Measurement Computing

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USB-2404 Series

Specifications (USB-2404-10/USB-2404-60)

USB-2404-10 and USB-2404-60

Analog Input

Number Of Channels: 4

A/D Converter Resolution: 24-bit

A/D Converter Type: Delta-Sigma with analog pre-filtering

Sampling Mode: Simultaneous

Sample Rate: 1.613 kS/s to 50 kS/s1

Sample Rates (ƒ

s):

Internal Master Timebase: Frequency: 12.8 MHz

Accuracy: ±100 ppm maximum

Input Voltage Ranges (CH+ to CH–)

USB-2404-10

±10 V nominal

±10.52 V typ

±10.3 min

USB-2404-60

±60 V nominal

±62.64 V typ

±61.5 V min

Overvoltage Protection: ±100 V

Input Coupling: DC

Input Impedance (CH+ to CH–): 1 MΩ

Input Noise

USB-2404-10: 70 µV rms

USB-2404-60: 320 µV rms

Gain Drift: ±5 ppm/ºC

Offset Drift

USB-2404-10: ±24 µV/ºC

USB-2404-60: ±150 µV/ºC

Post Calibration Gain Match (Channel-to- Channel, 20 kHz): 0.22 dB max

Crosstalk (1 kHz): –130 dB

Phase Mismatch (Channel-to-Channel)

USB-2404-10: 0.075º/kHz max

USB-2404-60: 0.045º/kHz max

Phase Nonlinearity (ƒ

s= 50 kS/s): 0.11º max

Input Delay

USB-2404-10: 38.4 +3 µs

USB-2404-60: 38.4 +2.6 µs

Passband Frequency: 0.453

Passband Flatness (ƒ

s= 50 kS/s): ±100 mdB max

Stopband Frequency: 0.547 · ƒ

s

Stopband Rejection: 100 dB

Alias-Free Bandwidth: 0.453 · ƒ

s

–3 db Pre-Filter Bandwidth (ƒ

s= 50 kS/s): 24.56 kHz

Common Mode Rejection Ratio (ƒ

in= 60 Hz):

USB-2404-10: 126 dB

USB-2404-60: 116 dB

Spurious Free Dynamic Range (1 kHz, –60 dBFS): –128 dBFS

Total Harmonic Distortion

1 kHz, –1 dBFS: –99 dB

1 kHz, –20 dBFS:–105 dB

1 Full performance requires connections to a USB 2.0 Hi-Speed host controller

and USB 2.0 high-speed hubs.) The maximum sample rate may be lower on

USB 1.1 ports.

(ƒ

M ÷ 256)

n

, n = 1, 2, ... 31.

Accuracy

Measurement

Conditions

Percent of Reading

(Gain Error)

Percent of Range*

(Offset Error)

Calibrated

Maximum

(–0 ºC To 60 ºC)

±0.13%

±0.05%

Calibrated

Typical

(25 ºC, ±5 ºC)

±0.03%

±0.008%

Uncalibrated

Maximum

(–0 ºC To 60 ºC)

USB-2404-10: ±1.4%

USB-2404-60: ±1.2%

USB-2404-10: ±0.67%

USB-2404-60: ±0.55%

Uncalibrated

Typical

(25 ºC, ±5 ºC)

±0.3%

±0.11%

* The USB-2404-10 range equals 10.52 V.

The USB-2404-60 range equals 62.64 V.

Power

Current Consumption from USB: 500 mA, max

Bus Interface

USB Specification: USB 2.0 Hi-Speed mode (480 Mbps) is recommended. Other-

wise, USB 1.1 Full Speed mode (12 Mbps)

Environmental

Operating Temperature Range: 0 °C to 60 °C

Storage Temperature Range: –40 °C to 85 °C

Operating Humidity: 10% to 90% relative humidity, non-condensing

Storage Humidity: 5% to 95% relative humidity, non-condensing

Maximum Altitude: 2000 m (6562 feet)

Pollution Degree (IEC60664): 2

Mechanical

Dimensions (L × W × H): 114.30 × 139.7 × 38.1 mm (4.5 × 5.5 × 1.5 in)

Weight: 1.2 lbs. (544 grams)

Safety Voltages

Connect only voltages that are within the limits specified in this table.

Channel-to-Earth Ground Isolation

Continuous: 250 Vrms, Measurement Category II

Measurement Category II is for measurements performed on circuits

directly connected to the electrical distribution system. This cat-

egory refers to local-level electrical distribution, such as that provided

by a standard wall outlet, for example 115 V for US or 230 V for Europe.

Do not connect the device to signals or use for measurements within Measure-

ment Categories III or IV.

Withstand: 2,300 Vrms, verified by a 5 sec dielectric withstand test

Channel-to-Channel Isolation

Continuous: 250 Vrms, Measurement Category II (Note 4)

Withstand: 1390 Vrms, verified by a 5 sec dielectric withstand test