LT1461 LINER [Linear Technology], LT1461 Datasheet - Page 6

• Manufacturer Part Number: LT1461
• Description: Easy-to-Use, Ultra-Tiny, Differential, 16-Bit ADC With I2C Interface
• Manufacturer: LINER [Linear Technology]

PIN FUNCTIONS
LTC2453
GND (Pin 1): Ground. Connect to a ground plane through
a low impedance connection.
REF
The voltage on these pins can have any value between
GND and V
remains more positive than the negative reference input,
REF
(V
V
(Pin 1) with a 10μF capacitor in parallel with a low-se-
ries-inductance 0.1μF capacitor located as close to the
part as possible.
IN
BLOCK DIAGRAM
6
CC
REF
–
–
(Pin 5), IN
–
(Pin 4): Positive Supply Voltage. Bypass to GND
, by at least 2.5V. The differential reference voltage
(Pin 2), REF
= REF
CC
+
as long as the reference positive input, REF
to REF
+
(Pin 6): Differential Analog Input.
+
(Pin 3): Differential Reference Input.
–
) sets the full-scale range.
6
5
IN
IN
+
–
A/D CONVERTER
A/D CONVERTER
16-BIT ΔΣ
16-BIT ΔΣ
3
2
REF
REF
+
–
–
+
,
DECIMATING
SINC FILTER
SCL (Pin 7): Serial Clock Input of the I
LTC2453 can only act as a slave and the SCL pin only
accepts external serial clock. Data is shifted into the SDA
pin on the rising edges of SCL and output through the
SDA pin on the falling edges of SCL.
SDA (Pin 8): Bidirectional Serial Data Line of the I
Interface. The conversion result is output through the
SDA pin. The pin is high impedance unless the LTC2453
is in the data output mode. While the LTC2453 is in the
data output mode, SDA is an open drain pull down (which
requires an external 1.7k pull-up resistor to V
Exposed Pad (Pin 9): Ground. Must be soldered to PCB
ground.
4
1
V
GND
CC
OSCILLATOR
INTERFACE
INTERNAL
I
2
C
SCL
SDA
2453 BD
7
8
2
C Interface. The
CC
).
2453f
2
C