Datasheet

ADS8556
ADS8557
ADS8558
www.ti.com SBAS404B –OCTOBER 2006– REVISED JANUARY 2012
RECOMMENDED OPERATING CONDITIONS
MIN TYP MAX UNIT
Supply voltage, AVDD to AGND 4.5 5 5.5 V
Low-voltage levels 2.7 3.0 3.6 V
Supply voltage, BVDD to BGND
5V logic levels 4.5 5 5.5 V
Range 1 (±2 × V
REF
) 2 × V
REF
16.5 V
Input supply voltage, HVDD to AGND
Range 2 (±4 × V
REF
) 4 × V
REF
16.5 V
Range 1 (±2 × V
REF
) –16.5 –2 × V
REF
V
Input supply voltage, HVSS to AGND
Range 2 (±4 × V
REF
) –16.5 –4 × V
REF
V
Reference input voltage (V
REF
) 0.5 2.5 3.0 V
Range 1 (±2 × V
REF
) –2 × V
REF
+2 × V
REF
V
Analog inputs
(also see the Analog Inputs section)
Range 1 (±4 × V
REF
) –4 × V
REF
+4 × V
REF
V
Operating ambient temperature range, T
A
–40 +125 °C
DISSIPATION RATINGS
(1)
DERATING FACTOR T
A
≤ +25°C T
A
= +70°C T
A
= +85°C T
A
= +125°C
PACKAGE ABOVE T
A
= +25°C POWER RATING POWER RATING POWER RATING POWER RATING
LQFP-64 20.8mW/°C 2.60W 1.66W 1.35W 0.52W
(1) Based on High-K θ
JA
.
THERMAL CHARACTERISTICS
Over recommended operating conditions, unless otherwise noted.
ADS8556, ADS8557, ADS8558
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Low-K thermal resistance
(1)
74 °C/W
θ
JA
Junction-to-air thermal resistance
High-K thermal resistance
(1)
48 °C/W
Junction-to-case thermal
θ
JC
16 °C/W
resistance
ADS8556, HVDD = +15V, HVSS = –15V, AVDD = 5V,
251.7 298.5 mW
BVDD = 3V, and f
DATA
= maximum
ADS8557, HVDD = +15V, HVSS = –15V, AVDD = 5V,
P
D
Device power dissipation 253.2 303.0 mW
BVDD = 3V, and f
DATA
= maximum
ADS8558, HVDD = +15V, HVSS = –15V, AVDD = 5V,
262.2 318.0 mW
BVDD = 3V, and f
DATA
= maximum
(1) Modeled in accordance with the Low-K or High-K thermal metric definitions of EIA/JESD51-3.
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