Texas Instruments THS5651A Evaluation Module THS5651EVM THS5651EVM Datenbogen
Produktcode
THS5651EVM
CommsDAC System Description
comprises two input buffers, CommsDAC control logic, a CommsDAC, an external Vref, a
transformer, and an operational amplifier(op amp). This illustration provides a general overview of the
EVM. It is not meant to replace the circuit diagram, but to give a brief indication of the features and
functions available. It should be read in combination with the circuit diagram supplied and the device data
sheet SLAS247A.
EVM. It is not meant to replace the circuit diagram, but to give a brief indication of the features and
functions available. It should be read in combination with the circuit diagram supplied and the device data
sheet SLAS247A.
1.2
CommsDAC System Description
This printed wiring board (PWB) EVM supports four digital-to-analog converters (DACs).
•
THS5641A
•
THS5651A
•
THS5661A
•
THS5671A
The resolution is the main difference between these parts.
General features of these DACs are given in
Table 1-2. General ADC Features
Supports
Output
Vref_int/
Throughput
Throughput
Available
EVM Order
Device
Res.
Channels
Vref_Ext
VDD =3.3V
VDD= 5 V
Package
Number
THS5571A
14-bit
2
Yes
67 MSPS
100 MSPS
DW/PW
THS5671 EVM
THS5661A
12-bit
2
Yes
67 MSPS
100 MSPS
DW/PW
THS5661 EVM
THS5651A
10
–
bit
2
Yes
67 MSPS
100 MSPS
DW/PW
THS5651 EVM
THS5641A
8
–
bit
2
Yes
67 MSPS
100 MSPS
DW/PW
THS5641 EVM
1.2.1 THS5671A/THS5661A/THS5651A/THS5641A CommsDAC
The low-power CMOS CommsDAC device integrates a 1.2-V bandgap reference, a current-source-array,
a control amplifier, output current switches, and input latches/logic for controlling the differential output
current switches. The device, which can directly drive a 50-
a control amplifier, output current switches, and input latches/logic for controlling the differential output
current switches. The device, which can directly drive a 50-
Ω
load, has good linearity and excellent SFDR
specs, symmetrical output ON/OFF switching, and differential output. The CommsDAC family consists of
pin-compatible 14-, 12-, 10-, and 8-bit DACs. All devices offer identical user interface and operate from an
analog supply of 5 V and a digital supply of 3.3 V or 5 V. The THS56X1A full-scale current is adjustable
from 2 mA to 20 mA. Power dissipation at 5 V is less than 175 mW and in sleep mode the standby power
is about 25 mW. The THS56X1A is driven by the on-chip voltage reference or by an external voltage
reference.
pin-compatible 14-, 12-, 10-, and 8-bit DACs. All devices offer identical user interface and operate from an
analog supply of 5 V and a digital supply of 3.3 V or 5 V. The THS56X1A full-scale current is adjustable
from 2 mA to 20 mA. Power dissipation at 5 V is less than 175 mW and in sleep mode the standby power
is about 25 mW. The THS56X1A is driven by the on-chip voltage reference or by an external voltage
reference.
Any of the digital-to-analog converters (DACs) present on the EVM can be used to either process the
output of a parallel output ADC or to act as an independent device driven by either a pattern generator or
a DSP starter kit (DSK) board.
output of a parallel output ADC or to act as an independent device driven by either a pattern generator or
a DSP starter kit (DSK) board.
9
SLAU032C
–
February 2001
–
Revised April 2011
EVM Overview
Copyright
©
2001
–
2011, Texas Instruments Incorporated