Datasheet

ADS850
SBAS154C
3
www.ti.com
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= full specified temperature range, V
S
= +5V, specified differential input range = 1.5V to 3.5V, internal reference input, sampling rate = 10MSPS after calibration,
and V
REF
= 2V, unless otherwise specified.
ADS850Y
PARAMETER CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Logic Family +3V/+5V Logic Compatible CMOS
Convert Command Start Conversion Rising Edge of Convert Clock
High Level Input Current (V
IN
= 5V)
(4)
100 µA
Low Level Input Current (V
IN
= 0V) ±10 µA
High Level Input Voltage +2.0 V
Low Level Input Voltage +1.0 V
Input Capacitance 5pF
DIGITAL OUTPUTS
Logic Family +3V/+5V Logic Compatible CMOS V
Logic Coding Straight Offset Binary
Low Output Voltage (I
OL
= 50µA) 0.1 V
Low Output Voltage (I
OL
= 1.6mA) 0.4 V
High Output Voltage (I
OH
= 50µA) +4.5 V
High Output Voltage (I
OH
= 0.5mA) +2.4 V
3-State Enable Time OE = LOW 20 40 ns
3-State Disable Time OE = HIGH 2 10 ns
Output Capacitance 5pF
ACCURACY (4Vp-p Input Range)
Zero Error (Referred to –FS) At 25°C ±0.2 %FS
Zero Error Drift (Referred to –FS) ±5 ppm/°C
Gain Error
(5)
At 25°C ±0.7 %FS
Gain Error Drift
(5)
±15 ppm/°C
Gain Error
(6)
At 25°C ±0.042 %FS
Gain Error Drift
(6)
±15 ppm/°C
Power-Supply Rejection of Gain ∆V
S
= ±5% 82 dB
Reference Input Resistance 1.6 kΩ
Internal Voltage Reference Tolerance (V
REF
= 2.0V)
(7)
At 25°C ±13.5mV mV
Internal Voltage Reference Tolerance (V
REF
= 1.0V)
(7)
At 25°C ±6mV mV
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +V
S
Operating +4.7 +5.0 +5.3 V
Supply Voltage: VDRV Operating +2.7 +5.3 V
Supply Current: +I
S
Operating 53 mA
Power Dissipation VDRV = 3V External Reference 240 mW
VDRV = 5V External Reference 245 mW
VDRV = 3V Internal Reference 250 275 mW
VDRV = 5V Internal Reference 255 mW
Power-Down 20 mW
Thermal Resistance,
θ
JA
TQFP-48 56.5 °C/W
NOTES: (1) Spurious-Free Dynamic Range refers to the difference in magnitude between the fundamental and the next largest harmonic. (2) dBFS means dB
relative to full scale. (3) Effective number of bits (ENOB) is defined by (SINAD – 1.76)/6.02. (4) Internal 50kΩ pull-down resistor. (5) Includes internal reference.
(6) Excludes internal reference. (7) Typical reference tolerance based on ±1 sigma of distribution.