LTC2435CGN Linear Technology, LTC2435CGN Datasheet - Page 17

• Manufacturer Part Number: LTC2435CGN
• Description: IC ADC DIFF I/REF 20BIT 16-SSOP
• Manufacturer: Linear Technology

Specifications of LTC2435CGN

• Number Of Bits: 20
• Sampling Rate (per Second): 15
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIO S I FOR ATIO
Figure 7a. LTC2435/LTC2435-1 Normal Mode
Rejection When Using an External Oscillator
of Frequency f
Table 3a. LTC2435 State Duration
State
CONVERT
SLEEP
DATA OUTPUT
Table 3b. LTC2435-1 State Duration
State
CONVERT
SLEEP
DATA OUTPUT
INPUT FREQUENCY DEVIATION FROM NOTCH FREQUENCY (%)
–100
–110
–120
–130
–140
–60
–70
–80
–90
–12
–8
EOSC
Operating Mode
Internal Oscillator
External Oscillator
Internal Serial Clock F
External Serial Clock with Frequency f
Operating Mode
Internal Oscillator
External Oscillator
Internal Serial Clock F
External Serial Clock with Frequency f
–4
without Running Averages
U
0
4
U
F
F
F
f
F
Frequency f
F
Simultaneous 50Hz/60Hz Rejection
F
f
F
Frequency f
8
EOSC
EOSC
O
O
O
O
O
O
O
O
O
2435 F07a
= LOW, (60Hz Rejection)
= HIGH, (50Hz Rejection)
= External Oscillator with Frequency 10278/f
= LOW/HIGH, (Internal Oscillator)
= External Oscillator with
= LOW
= External Oscillator with Frequency 10278/f
= LOW (Internal Oscillator)
= External Oscillator with
kHz (f
kHz (f
12
W
EOSC
EOSC
EOSC
EOSC
SCK
SCK
–100
–100
–120
–130
–140
/2560 Rejection)
/2560 Rejection)
–80
–90
kHz
kHz
kHz
kHz
Figure 7b. LTC2435-1 Normal Mode
Rejection When Using an Internal
Oscillator with Running Averages
48
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
U
50
52
54
Duration
67ms, Output Data Rate ≤ 15 Readings/s
80ms, Output Data Rate ≤ 12.4 Readings/s
As Long As CS = HIGH
As Long As CS = LOW But Not Longer Than 1.25ms (24 SCK cycles)
As Long As CS = LOW But Not Longer Than 192/f
As Long As CS = LOW But Not Longer Than 24/f
Duration
73ms, Output Data Rate ≤ 14 Readings/s
As Long As CS = HIGH
As Long As CS = LOW But Not Longer Than 1.4ms (24 SCK cycles)
As Long As CS = LOW But Not Longer Than 192/f
As Long As CS = LOW But Not Longer Than 24/f
56
58
EOSC
EOSC
60
s, Output Data Rate ≤ f
s, Output Data Rate ≤ f
2435 F07b
62
LTC2435/LTC2435-1
–100
–105
–110
–115
–120
–125
–130
–135
–140
–80
–85
–90
–95
DEVIATION FROM NOTCH FREQUENCY f
–12
Figure 7c. LTC2435/LTC2435-1
Normal Mode Rejection When Using
an External Oscillator of Frequency
f
EOSC
DIFFERENTIAL INPUT SIGNAL FREQUENCY
EOSC
EOSC
with Running Averages
–8
/10278 Readings/s
/10278 Readings/s
–4
SCK
SCK
EOSC
EOSC
ms (24 SCK cycles)
ms (24 SCK cycles)
0
ms (24 SCK cycles)
ms (24 SCK cycles)
4
EOSC
17
8
2435 F07c
/2560(%)
24351fb
12