Datasheet

TLV1572
2.7 V TO 5.5 V, 10-BIT, 1.25 MSPS
SERIAL ANALOG-TO-DIGITAL CONVERTER WITH AUTO-POWERDOWN
SLAS171A – DECEMBER 1997– REVISED SEPTEMBER 1998
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, V
CC
= 5 V,
V
REF
= 5 V, f
SCLK
= 20 MHz (unless otherwise noted)
digital specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Logic inputs
I
IH
High-level input current V
CC
= 5 V –50 50 µA
I
IL
Low-level input current V
CC
= 5 V –50 50 µA
C
i
input capacitance 5 pF
Logic outputs
V
OH
High-level output voltage I
OH
= 50 µA – 0.5 mA V
CC
–0.4 V
V
OL
Low-level output voltage I
OL
= 50 µA – 0.5 mA 0.4 V
I
OZ
High-impedance-state output current –50 50 µA
C
O
Output capacitance 5 pF
dc specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Resolution 10 Bits
Accuracy
INL Integral nonlinearity Best fit ±0.5 ±1 LSB
DNL Differential nonlinearity ±0.3 ±1 LSB
Offset error ±0.1 ±0.15 %FSR
Gain error ±0.1 ±0.2 %FSR
Analog input
Input full scale range GND V
CC
V
Input capacitance 15 pF
input leakage current V
AIN
= 0 to V
CC
50 µA
Voltage reference input
V
REF+
Positive reference voltage 3 V
CC
V
V
REF–
Negative reference voltage Internally connects to GND GND V
Input resistance 2 KΩ
Input capacitance 300 pF
Power supply
I
CC
+I
REF
O
p
erating su
pp
ly current
V
CC
= 5.5 V, f
SCLK
= 20 MHz 5.5 8.5
mA
I
CC
+
I
REF
Operating
supply
current
V
CC
= 3 V, f
SCLK
= 10 MHz 2.7
mA
I
PD
Supply current in powerdown mode V
CC
10 µA
Power dissipation V
CC
= 5 V 25 mW
Power dissipation V
CC
= 3 V 8 mW