THS5661A_15 Datasheet, PDF (3/34 Pages) Texas Instruments – DIGITAL-TO-ANALOG CONVERTER

THS5661A
12ĆBIT, 125 MSPS, CommsDAC
DIGITALĆTOĆANALOG CONVERTER
SLAS247B − NOVEMBER 1999 REVISED SEPTEMBER 2002
Terminal Functions
TERMINAL
NAME
I/O
NO.
DESCRIPTION
AGND
20
I Analog ground return for the internal analog circuitry
AVDD
BIASJ
24
I Positive analog supply voltage (3 V to 5.5 V)
18 O Full-scale output current bias
CLK
28
I External clock input. Input data latched on rising edge of the clock.
COMP1
19
I Compensation and decoupling node, requires a 0.1 µF capacitor to AVDD.
COMP2
23
I Internal bias node, requires a 0.1 µF decoupling capacitor to AGND.
D[11:0]
[1:12]
I Data bits 0 through 11.
D11 is most significant data bit (MSB), D0 is least significant data bit (LSB).
DGND
26
I Digital ground return for the internal digital logic circuitry
DVDD
EXTIO
27
I Positive digital supply voltage (3 V to 5.5 V)
17 I/O Used as external reference input when internal reference is disabled (i.e., EXTLO = AVDD). Used as internal
reference output when EXTLO = AGND, requires a 0.1 µF decoupling capacitor to AGND when used as reference
output.
EXTLO
IOUT1
16
O Internal reference ground. Connect to AVDD to disable the internal reference source.
22 O DAC current output. Full scale when all input bits are set 1
IOUT2
21 O Complementary DAC current output. Full scale when all input bits are 0
MODE
25
I Mode select. Internal pulldown. Mode 0 is selected if this pin is left floating or connected to DGND. See
timing diagram.
NC
[13:14] N No connection
SLEEP
15
I Asynchronous hardware power down input. Active high. Internal pulldown. Requires 5 µs to power down but 3 ms
to power up.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)^†
Supply voltage range, AV_DD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 6.5 V
DV_DD (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 6.5 V
Voltage between AGND and DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 0.5 V
Supply voltage range, AV_DD to DV_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.5 V to 6.5 V
CLK, SLEEP, MODE (see Note 2) . . . . . . . . . . . . . . . . . . . . . . −0.3 V to DV_DD + 0.3 V
Digital input D11−D0 (see Note 2) . . . . . . . . . . . . . . . . . . . . . −0.3 V to DV_DD + 0.3 V
IOUT1, IOUT2 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1 V to AV_DD + 0.3 V
COMP1, COMP2 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to AV_DD + 0.3 V
EXTIO, BIASJ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to AV_DD + 0.3 V
EXTLO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 0.3 V
Peak input current (any input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Peak total input current (all inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA
Operating free-air temperature range, T_A: THS5661AI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from the case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Measured with respect to AGND.
2. Measured with respect to DGND.
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