THS5641AIDWG4 Datasheet, PDF (2/31 Pages) Texas Instruments – 8-BIT, 100 MSPS, CommsDAC DIGITAL-TO-ANALOG CONVERTER

THS5641A
8ĆBIT, 100 MSPS, CommsDAC
DIGITALĆTOĆANALOG CONVERTER
SLAS277A −MARCH 2000 − REVISED SEPTEMBER 2002
description (continued)
The THS5641A provides a nominal full-scale differential output current of 20 mA and >300 kΩ output
impedance, supporting both single-ended and differential applications. The output current can be directly fed
to the load (e.g., external resistor load or transformer), with no additional external output buffer required. An
accurate on-chip reference and control amplifier allows the user to adjust this output current from 20 mA down
to 2 mA, with no significant degradation of performance. This reduces power consumption and provides 20 dB
gain range control capabilities. Alternatively, an external reference voltage and control amplifier may be applied
in applications using a multiplying DAC.
The THS5641A is available in both a 28-pin SOIC and TSSOP package. The device is characterized for
operation over the industrial temperature range of −40°C to 85°C.
AVAILABLE OPTIONS
PACKAGE
TA
28-TSSOP
28-SOIC
(PW)
(DW)
−40°C to 85°C
THS5641AIPW THS5641AIDW
functional block diagram
C1 ^AVDD
EXTLO
CEXT
0.1 µF
2 kΩ
EXTIO
BIASJ
I _BIAS
RBIAS
DVDD
D[7:0]
SLEEP COMP1
1.2 V
REF
1 nF
−
+
Control
AMP
0.1 µF
COMP2
0.1 µF
Current
Source
Array
Output
Current
Switches
Logic
Control
IOUT1
50 Ω ^RLOAD
IOUT2
50 Ω ^RLOAD
MODE
CLK
DGND
AGND
2
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