LTC1407 LINER [Linear Technology], LTC1407 Datasheet - Page 7

• Manufacturer Part Number: LTC1407
• Description: Serial 12-Bit/14-Bit, 3Msps Simultaneous Sampling Simultaneous Sampling
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
CH0
differentially with respect to CH0
differential swing and a 0 to V
CH0
differentially with respect to CH0
differential swing and a 0 to V
V
a solid analog ground plane with a 10 F ceramic capacitor
(or 10 F tantalum in parallel with 0.1 F ceramic). Can be
overdriven by an external reference voltage 2.55V and
CH1
differentially with respect to CH1
differential swing and a 0 to V
CH1
differentially with respect to CH1
differential swing and a 0 to V
GND (Pins 6, 11): Ground and Exposed Pad. This single
ground pin and the Exposed Pad must be tied directly to
the solid ground plane under the part. Keep in mind that
analog signal currents and digital output signal currents
flow through these connections.
REF
V
U
DD
+
–
+
–
(Pin 3): 2.5V Internal Reference. Bypass to GND and
.
(Pin 1): Noninverting Channel 0. CH0
(Pin 4): Noninverting Channel 1. CH1
(Pin 2): Inverting Channel 0. CH0
(Pin 5): Inverting Channel 1. CH1
U
2.4902
2.4900
2.4898
2.4896
2.4894
2.4892
2.4890
2.6
Reference Voltage vs V
U
2.8
W
3.0
DD
DD
DD
DD
V
DD
U
absolute input range.
absolute input range.
absolute input range.
absolute input range.
+
+
3.2
(V)
–
–
with a –2.5V to 0V
with a –2.5V to 0V
with a 0V to 2.5V
with a 0V to 2.5V
DD
3.4
–
–
+
+
operates fully
operates fully
operates fully
operates fully
3.6
1407 G12
V
supplies 3V to the entire chip. Bypass to GND pin and solid
analog ground plane with a 10 F ceramic capacitor (or
10 F tantalum) in parallel with 0.1 F ceramic. Keep in
mind that internal analog currents and digital output signal
currents flow through this pin. Care should be taken to
place the 0.1 F bypass capacitor as close to Pins 6 and 7
as possible.
SDO (Pin 8): Three-state Serial Data Output. Each pair of
output data words represent the two analog input chan-
nels at the start of the previous conversion.
SCK (Pin 9): External Clock Input. Advances the conver-
sion process and sequences the output data on the rising
edge. One or more pulses wake from sleep.
CONV (Pin 10): Convert Start. Holds the two analog input
signals and starts the conversion on the rising edge. Two
pulses with SCK in fixed high or fixed low state starts Nap
mode. Four or more pulses with SCK in fixed high or fixed
low state starts Sleep mode.
DD
(Pin 7): 3V Positive Supply. This single power pin
2.4902
2.4900
2.4898
2.4896
2.4894
2.4892
2.4890
V
DD
0
Reference Voltage
vs Load Current
0.2
= 3V, T
0.4
0.6
LOAD CURRENT (mA)
A
LTC1407/LTC1407A
= 25 C (LTC1407/LTC1407A)
0.8
1.0
1.2
1.4
1.6
1.8
1407 G13
2.0
7
1407f