LTC2420IS8 Linear Technology, LTC2420IS8 Datasheet - Page 34

• Manufacturer Part Number: LTC2420IS8
• Description: IC ADC 20BIT MICROPOWER 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC2420IS8

• Number Of Bits: 20
• Sampling Rate (per Second): 7.5
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC2420
2.048MHz Oscillator for 100sps Output Ratio
The oscillator circuit shown in Figure 40 can be used to
drive the F
LTC2420 for applications that do not require a notch at
50Hz or 60Hz. This oscillator is not sensitive to hysteresis
voltage of a Schmitt trigger device as are simpler
TYPICAL APPLICATIO S
34
O
pin, boosting the conversion rate of the
100smps, F
30smps, F
U1: 74HC14 OR EQUIVALENT
U
Figure 40. 2.048MHz Oscillator for 100sps Output Rate
270pF
1k
5k
O
O
= 614.4kHz
= 2.048MHz
10k
1
2N3904
10pF
U1-A
47k
2
5pF
3
U1-B
4
47k
1k
relaxation oscillators using the 74HC14 or similar de-
vices. The circuit can be tuned over a 3:1 range with only
one resistor and can be gated. The use of transmission
gates could be used to shift the frequency in order to
provide setable conversion rates.
11
5
9
U1-D
U1-C
U1-E
2420 F40
10
6
8
TO LTC2420
F
12
O
PIN
U1-F
13
HALT