USB-1608HS Series
16-Bit Simultaneous Sampling DAQ DevicesFeatures• Simultaneous analog sampling• Sample rates up to 250 kS/s perchannel• Eight SE or DIFF analog inputs• Up to two analog outputs• 8 digital inputs and 8 digitaloutputs• One trigger input• One event counter• External 5 V power adapter
and DIN rail clips included

Supported Operating Systems• Windows® 11/10/8/7/Vista®/

The USB-1608HS Series provides simultaneous sampling at rates up to 250 kS/s per channel.

Overview

XP 32/64-bit• Linux®

With one A/D converter per channel, the USB-1608HS Series offers true simultaneous sampling of up to eight 16-bit analog inputs at 250 kHz per channel.
The USB-1608HS Series is housed in a heavy-duty chassis with integrated mounting slots, ensuring that the hardware is rugged enough for any DAQ application.
A required external power supply is included.

Analog Input

Users can configure the pull-up/down
configuration with onboard jumpers. EachDIO pin has an associated LED to indicate
the digital input/output state.

The USB-1608HS Series provides eightsingle-ended or eight differential analog
inputs. Users can mix SE and DIFF channels. Each input has a dedicated 16-bit A/Dconverter for true simultaneous sampling
per channel. The input range is softwareselectable, and the sample rate is 250 kS/s
per channel. Users can pace operations
with an internal or external clock.

Trigger Input

Analog Output•

Positive or negative slope•

Edge or level sensitive•

Retrigger on or off

The USB-1608HS-2AO provides two independent, 16-bit analog voltage outputs.
The throughput rate is 70 kS/s for one
channel, and 35 kS/s for two channels.
Users can clock output operations withthe onboard scan clock.

An analog trigger input can be used tostart an acquisition. The trigger thresholdrange is ±10 V. The threshold resolution
12 bits. Users can set the following trigger options:

The trigger is automatically rearmed after
acquiring a specified number of samples.

Users can enable remote sensing for each
output to compensate for any voltage drop
error that may occur.

Digital I/O
The 16 digital I/O lines are configured
as 8 inputs and 8 outputs. The digital
I/O transfer rate is up to 8000 port or
single bit reads/writes per second, systemdependent.

Measurement Computing

Counter Input
The counter channel is a TTL-level input
to a 32-bit event counter. The counterincrements when the TTL level transitions
from low to high. The counter can countfrequencies of up to 1 MHz.

Clock I/O
Users can pace operations with theinternal clock or with an external source.
Two terminals are provided for external
clocking and multi-unit synchronization:•SYNC_IN externally paces A/D conversions. TTL-level input signals ofup to 250 kHz are supported.

•SYNC_OUT outputs the clock for
A/D conversions.

Users can connect the SYNC_OUT pin on
one device to the SYNC_IN pin of a second
device and acquire data synchronously
from 16 analog input channels.

USB-1608HS Series Selection Chart
ModelAnalog
Input

Sample Rate
per Channel(max)AnalogOutputDigitalI/OCounter
Input

Clock
SourceUSB-1608HS

8 SE/
8 DIFF250 kS/s

08 input
8 output

1

Internal,
external input
and output

USB-1608HS-2AO

8 SE/
8 DIFF250 kS/s

2

8 input
8 output

1

Internal,
external input
and output(508) 946-5100

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USB-1608HS SeriesFeatures
PowerCalibration

The USB-1608HS Series requires external power. A 5 V power
adapter (PS-5V2AEPS) is included with each shipment.

The USB-1608HS Series is factory-calibrated using a NIST-traceablecalibration process. Specifications are guaranteed for one year.
The USB-1608HS Series also supports field calibration for users
to calibrate the device locally with the InstaCal utility.

USB-1608HS Series Block Diagram
USB
High-speed
USB 2.0
CompliantInterface

32k x 16
SRAM

161616

CH7_H

CH7_L

CH6_H

CH6_L

CH5_H

CH5_L

CH4_H

CH4_L

CH3_H

CH3_L

CH2_H

CH2_L

CH1_H

CH1_L

CHO_H

CHO_L

A/D 6

G=1,2,5,10

CH1 force

32-biteventcounter

DAC 1DigitalOutput

CH1 sense

DigitalInput

DAC 01SPI

2CH0 sense

8

SYNC_OUT

8

A/D 3

USB-1608HS-2AO
only

CH0 force

SYNC_IN

TRIG_INUSB
Microcontroller

Screw terminal I/O connector

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USB-1608HS Series
Software
Software Support
The USB-1608HS Series is supported by the software in the table below.
Ready-to-Run Applications

DAQami™

Data acquisition companion software with drag-and-drop interface that is used to acquire,view, and log data, and generate signals. DAQami can be configured to log analog, digital, andcounter channels, and to view that data in real-time or post-acquisition on user-configurable
displays. Logged data can be exported for use in Excel® or MATLAB®. Windows OS
DAQami is included with the free MCC DAQ Software bundle.

InstaCal™

TracerDAQ™ andTracerDAQ Pro

An interactive installation, configuration, and test utility for MCC hardware. Windows OS
InstaCal is included with the free MCC DAQ Software bundle.
Virtual strip chart, oscilloscope, function generator, and rate generator applications used togenerate, acquire, analyze, display, and export data. Supported features may vary by hardware.
The Pro version provides enhanced features. Windows OS
TracerDAQ is included with the free MCC DAQ Software bundle.
TracerDAQ Pro is available as a purchased software download.

General-Purpose Programming Support
Universal Library™
(UL) for Windows

Library for developing applications in C, C++, VB, C# .Net, VB .Net, and Python on Windows.
The UL for Windows is included with the free MCC DAQ Software bundle.
The UL Python API for Windows is available on GitHub (github.com/mccdaq/mcculw).

Library for developing applications in C, C++, and Python on Linux.
UL for Linux®

UL for Linux is available on GitHub (github.com/mccdaq/uldaq).
Open-source, third-party Linux drivers are also available for supported MCC devices.

Application-Specific Programming Support
ULx forNI LabVIEW™

DASYLab®

MATLAB driver®

A comprehensive library of VIs and example programs for NI LabVIEW that is used to develop
custom applications that interact with most MCC devices. Windows OS
ULx for NI LabVIEW is included with the free MCC DAQ Software bundle.
Icon-based data acquisition, graphics, control, and analysis software that allows users to create
complex applications in minimal time without text-based programming. Windows OS
DASYLab is available as a purchased software download. An evaluation version is available for28 days.
High-level language and interactive environment for numerical computation,visualization, and programming. The Mathworks Data Acquisition Toolbox™ allows users toacquire data from most MCC PCI and USB devices.
Visit www.mathworks.com for more information about the Data Acquisition Toolbox.

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USB-1608HS SeriesSpecifications
Noise Performance

All specifications are subject to change without notice.
These specifications apply to both standard and OEM versions unless noted.

Range
(V)

Analog Input

A/D converter type: 16-bit successive approximation type
Number of channels: Eight differential or eight single-ended
Input configuration: Individual A/D per channel
Sampling method: Simultaneous
Analog input modes
Power up and reset state: CHx_H and CHx_L inputs are disconnected fromtheir screw terminal pins and internally connected to GND; recommended
configuration for unused inputs.
Single-ended: CHx_H inputs are connected directly to their screw terminal pins.
CHx_L inputs are disconnected from their screw terminal pins and internallyconnected to GND.
Differential: CHx_H and CHx_L inputs are connected directly to their screw
terminal pins.
Absolute maximum input voltage:
CHx IN to GND: ±25 V max (power on)
TRIG_IN to GND: ±15 V max (power off)
Input impedance (CHx IN): 1 GΩ (power on), 1.5 kΩ (power off)
Input bandwidth (–3 dB) (all input ranges): 330 kHz
Input leakage current: ±25 pA
Input capacitance: 50 pf
Input ranges (software-selectable per channel): ±10 V, ±5 V, ±2 V, ±1 V
A/D pacing : Onboard A/D clock, external source (SYNC_IN). Refer to “ExternalClock Input/Output” on page 5.
A/D trigger source: TRIG_IN input. Refer to “External Trigger” on page 5.
A/D trigger modes: External analog. Refer to “External Trigger” on page 5.
Maximum working voltage (signal + common mode): FSR ±0.05% FSR max
Sampling rate: 0.009 S/s to 250 kS/s, software-selectable
Throughput
Software paced: 33 to 8000 S/s all channels, system dependent
Scan to PC memory: 250 kS/s per channel max (limited on USB 1.1 ports)
Resolution: 16 bits
Differential non-linearity
Calibrated: ±2.0
Uncalibrated: ± 0.5 LSB typ, ±1.0 LSB max (applies to the entire 0 °C to 55 °C
temperature range)
CMRR (60 Hz)±10 V: 81 dB min±5 V: 81 dB min±2 V: 92 dB min±1 V: 92 dB min

Range (V)±1±0.702

1.218881.211.211.21Analog Input Calibration

Recommended warm-up time: 15 minutes min
Calibration method: Software calibration
Calibration interval: 1 year
Calibration reference: +10.000 V, ±5 mV max. Actual measured values storedin EEPROM
Tempco: 5 ppm/°C max
Long term stability: 30 ppm/1000 h

Range(V)Integral
Non-Linearity(% FSR)

Gain
Error at
FS (mV)

Offset(mV)Gain
Tempco(ppm/°C)

OffsetTempco(µV/°C)±100.00915

4.578

1.526

3.8

19.5

±5±2±10.00915
0.009150.00915

2.289
0.916
0.458

0.763
0.305
0.153

7.0
16.5
40.1

19.5
24.3
29.2

Digital Input/Output

Digital type: 5 V CMOS
Number of I/O: 16
Configuration: Eight input, eight output
Pull-up/down configuration: The eight input pins have 47 kΩ resistors that may
be configured to either pull-up or pull-down with a jumper.
Digital I/O transfer rate: System dependent, 33 to 8000 port reads/writes or single
bit reads/writes per second.
Input high voltage: 2.0 V min, 5.5 V absolute max
Input low voltage: 0.8 V max, –0.5 V absolute min
Output high voltage: (IOH = –2.5 mA): 3.8 V min
Output low voltage: (IOL = 2.5 mA): 0.7 V max
Power on and reset state: Outputs: driven low
LED indicators: Each I/O pin has an associated LED status indicator. A high state
turns the LED on. The LEDs may be disabled with jumpers JP1 (input LEDs)
and JP2 (output LEDs).

All values are ±. When connecting differential inputs to floating input sources,
the user must provide a DC return path from each differential input to ground byconnecting a resistor from each differential input to AGND. A value of approximately 100 kΩ can be used for most applications.

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Number of channels: Two independent
Resolution: 16 bits
Output range: ±10 VThroughput
Single channel: 70 kS/s
Two channel: 35 kS/s
Pacer source: Onboard D/A clock
Monotonicity: 16 bits
Glitch energy: 200 nV/s
Current output: ±10 mA max single channel, ±20 mA max two channels.
The maximum load that the analog output can drive is calculated by dividing
the full scale output voltage by the current output specification or (10 V/10 mA)= 1000 Ω. This calculation is valid whether the remote sense feature is enabledor disabled.
Output short-circuit protection (Output connect to GND): 100 ms max
Output coupling: DCPower up and reset state: DACs clear to midscale, (0 V, ±20 mV). Remote sense
is disabled.
Remote sense configuration: Enabled or disabled through software control.
Remote sense compliance voltage (Note 4): ±10.75 V max
The remote sense feature can compensate for any series resistance up to 75 Ω
between its force terminal pins and its output load.
Remote sense compensation range (Note 5): 0 to 75 Ω max
Rload should not exceed the specified 1000 Ω, and Rseries should not exceed its
specified limit of 75 Ω.
Output noise: 100 nV/Hz
Settling time (to 0.003%):20 V output step, (RL = 5 kΩ, CL = 200 pf): 5 µS max
Slew rate: 10 V/µs
Absolute accuracy: ±0.25% of FSR max
Offset error drift: ±4 ppm/°C
Gain error drift: ±10 ppm/°C

Accuracy Components

Measurement Computing±10±5±2±1Analog Output (USB-1608HS-2AO only)

Accuracy (mV)
±7.019±3.509±1.403

RMS Noise(LSBrms)

All values are ±. Noise distribution is determined by gathering 50 kS with inputs
tied to ground at the user connector. Samples are gathered at the maximum specified sampling rate of 250 kS/s.

Calibrated Absolute Accuracy±10±5±2

Peak to Peak Noise(Counts)

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USB-1608HS Series
Ordering
External Trigger

Counter

Trigger source: TRIG_IN input
Trigger input range: ±10 V max
Absolute maximum input voltage
TRIG_IN to GND: ±25 V max (power on), ±15 V max (power off)
Trigger threshold levels: ±10 V/4096; software-selectable.
Input impedance: 1 MΩ (power on), 1.5 kΩ (power off)
Trigger modes: Positive/negative slope, edge/level sensitive, retrigger on/off
Threshold resolution: 12 bits, 1 in 4096
Threshold accuracy: ±0.25% FSR
Hysteresis: ±5 mV
Full power bandwidth (–3 dB): 640 kHz

Pin name: CTR
Counter type: Event counter; Schmitt trigger input protected with a 1 kΩ series
resistor.
Number of channels: 1Input type : TTL, rising edge triggered
Input source: CTR screw terminal
Resolution: 32 bits
Schmidt trigger hysteresis: 0.58 V to 0.93 V
Input leakage current: ±5 µA
Maximum input frequency: 1 MHz
High pulse width: 500 ns min
Low pulse width: 500 ns min
Input high voltage: 2.4 V min, 6.5 V absolute max
Input low voltage: 2.19 V max, –0.5 V absolute minExternal Clock Input/Output

Pin names: SYNC_IN, SYNC_OUT
Pin type
SYNC_IN: Input; receives the A/D pacer clock signal from an external source;
rising edge sensitive.
SYNC_OUT: Output; outputs the A/D pacer clock signal. Over-current protectedwith a 200 Ω series resistor.
Input clock rate: 250 kHz max
Clock pulse width
SYNC_IN: 1 µs min
SYNC_OUT: 2 µs min
Input leakage current: ±2.0 µA
Input high voltage: 3.5 V min, 6.5 V absolute max
Input low voltage: 1.5 V max, –0.5 V absolute min
Output high voltage
IOH = –2.5 mA: 3.3 V min
No load: 3.8 V min
Output low voltage
IOL = 2.5 mA: 1.1 V max
No load: 0.6 V max

PowerSupply current
Continuous mode: 920 mA. This is the total current requirement, and does
not include any additional contribution due to the power output pin current,analog output source current, or DIO loading.
+5V EXT pin output voltage range: 4.5 V min, 5.25 V max. Output voltage range
assumes that the input power supply is within specified limits.
+5V EXT pin output current: +10 mA max. This is the total amount of current
that can be sourced for general use from the power output pin.
External power input: +5.0 VDCExternal power adapter: +5 V, ±5% @ 2 A (MCC p/n PS-5V2AEPS included)

Environmental

Operating temperature range: 0 °C to 55 °C max
Storage temperature range: –40 °C to 85 °C max
Humidity: 0% to 90% non-condensing

Mechanical

Dimensions (L × W × H)
Board: 203.2 × 121.9 × 15.2 mm (8.0 × 4.8 × 0.6 in.)
Enclosure: 241.3 × 125.7 × 58.9 mm (9.50 × 4.95 × 2.32 in.)

Order Information

Software also Available from MCC

HardwarePart No.

Description

TracerDAQ Pro

Out-of-the-box virtual instrument suite with strip chart,
oscilloscope, function generator, and rate generator –professional version

DASYLabIcon-based data acquisition, graphics, control, and analysis
softwarePart No.

Description

USB-1608HS

16-bit, 250 kS/s device with eight SE and eight DIFF
simultaneous sampling analog inputs, one counter,and 16 DIO lines. Includes USB cable, external power
supply (PS-5V2AEPS), and DIN rail mounting clips.

USB-1608HS-2AO

16-bit, 250 kS/s device with eight SE and eight DIFF
simultaneous sampling analog inputs, two analog
outputs, one counter, and 16 DIO lines. Includes USB
cable, external power supply (PS-5V2AEPS), and DIN
rail mounting clips.

PS-5V2AEPS

Replacement power supply; interchangeable plugs areavailable separately.

Measurement Computing
DS USB-1608HS(508) 946-5100

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September 2019. Rev 4© Measurement Computing Corporation