LTC2487 Linear Technology, LTC2487 Datasheet - Page 11

• Manufacturer Part Number: LTC2487
• Description: 16-Bit 2-/4-Channel ADC
• Manufacturer: Linear Technology

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FuncTional block DiagraM
pin FuncTions
selected inputs (IN
V
Outside this input range, the converter produces unique
over-range and under-range output codes.
CH0 to CH3 (Pin 8-Pin 11): Analog Inputs. May be pro-
grammed for single-ended or differential mode.
V
a 10µF tantalum capacitor in parallel with a 0.1µF ceramic
capacitor as close to the part as possible.
IN
CC
= (IN
(Pin 12): Positive Supply Voltage. Bypass to GND with
+
– IN
GND
–
V
) from –0.5 • V
CC
+
and IN
REF
REF
COM
CH0
CH1
CH2
CH3
+
–
–
) provide a bipolar input range
REF
/Gain to 0.5 • V
SENSOR
TEMP
MUX
IN
IN
+
–
∆Σ MODULATOR
–
DIFFERENTIAL
REF
3RD ORDER
/Gain.
+
REF
The voltage on these pins can have any value between
GND and V
REF
input, REF
= REF
to 0.5 • V
Exposed Pad (Pin 15): Ground. This pin is ground and
must be soldered to the PCB ground plane. For prototyping
purposes, this pin may remain floating.
AUTOCALIBRATION
+
+
DECIMATING FIR
, remains more positive than the negative reference
, REF
AND CONTROL
+
ADDRESS
– REF
REF
–
–
, by at least 0.1V. The differential voltage (V
CC
(Pin 13, Pin 14): Differential Reference Input.
/Gain) for all input channels.
–
) sets the full-scale range (–0.5 • V
as long as the reference positive input,
OSCILLATOR
INTERFACE
INTERNAL
I
2
C
2487 BD
1.7k
F
(INT/EXT)
SDA
SCL
CA0
CA1
O
LTC2487
REF

/Gain
2487fa
REF