參數(shù)資料
型號： LTC2435IGN#PBF
廠商： Linear Technology
文件頁數(shù)： 1/42頁
文件大?。?/td> 0K
描述： IC ADC DIFF I/REF 20BIT 16-SSOP
標準包裝： 100
位數(shù)： 20
采樣率（每秒）： 15
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
轉換器數(shù)目： 2
功率耗散（最大）： 1mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應商設備封裝： 16-SSOP
包裝： 管件
輸入數(shù)目和類型： 1 個差分，雙極
LTC2435/LTC2435-1
1
24351fc
For more information www.linear.com/LTC2435
Typical applicaTions
FeaTures
applicaTions
DescripTion
20-Bit No Latency
∑
ADCs with Differential Input and
Differential Reference
The LTC2435/LTC2435-1 are 2.7V to 5.5V micropower
20-bit differential ∑ analog to digital converters with
integrated oscillator, 3ppm INL and 0.8ppm RMS noise.
They use delta-sigma technology and provide single
cycle settling time for multiplexed applications. Through
a single pin, the LTC2435 can be configured for better
than 110dB input differential mode rejection at 50Hz or
60Hz ±2%, or it can be driven by an external oscillator
for a user defined rejection frequency. The LTC2435-1
can be configured for better than 87dB input differential
mode rejection over the range of 49Hz to 61.2Hz (50Hz
and 60Hz ±2% simultaneously). The internal oscillator
requires no external frequency setting components.
The converters accept any external differential reference
voltage from 0.1V to VCC for flexible ratiometric and re-
mote sensing measurement configurations. The full-scale
differential input range is from –0.5VREF to 0.5VREF . The
reference common mode voltage, VREFCM, and the input
common mode voltage, VINCM, may be independently set
anywhere within the GND to VCC range of the LTC2435/
LTC2435-1. The DC common mode input rejection is
better than 120dB.
The LTC2435/LTC2435-1 communicate through a flexible
3-wire digital interface which is compatible with SPI and
MICROWIRE protocols.
Integral Nonlinearity vs Input
n
2× Speed Up Version of the LTC2430: 15Hz Output
Rate, 60Hz Notch—LTC2435; 13.75Hz Output Rate,
Simultaneous 50Hz/60Hz Notch—LTC2435-1
n
Differential Input and Differential Reference with
GND to VCC Common Mode Range
n
3ppm INL, No Missing Codes
n
10ppm Gain Error
n
0.8ppm Noise
n
Single Conversion Settling Time for Multiplexed
Applications
n
Internal Oscillator—No External Components Required
n
Single Supply 2.7V to 5.5V Operation
n
Low Supply Current (200A,4A in Auto Sleep)
n
20-Bit ADC in Narrow SSOP-16 Package
(SO-8 Footprint)
n
Direct Sensor Digitizer
n
Weight Scales
n
Direct Temperature Measurement
n
Gas Analyzers
n
Strain Gage Transducers
n
Instrumentation
n
Data Acquisition
n
Industrial Process Control
n
6-Digit DVMs
L
, LT, LTC and LTM are registered trademarks and C-Load and No Latency ∑ are trademarks
of Linear Technology Corporation. Protected by U.S. Patents including 6140950, 6169506.
VCC
FO
REF+
REF–
SCK
IN+
IN–
SDO
GND
CS
2
14
3
4
13
5
6
12
1, 7, 8, 9, 10, 15, 16
11
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG INPUT RANGE
–0.5VREF TO 0.5VREF
= INTERNAL OSC/50Hz REJECTION (LTC2435)
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION (LTC2435)
= INTERNAL 50Hz/60Hz REJECTION (LTC2435-1)
3-WIRE
SPI INTERFACE
1μF
2.7V TO 5.5V
LTC2435/
LTC2435-1
2435 TA01
VCC
10
8
6
4
2
0
–2
–4
–6
–8
–10
INPUT VOLTAGE (V)
–2.5
–1.5
–0.5
0.5
1.5
2435 TA01b
2.5
FO = GND
VCC = 5V
VREF = 5V
VINCM = VINCM = 2.5V
TA = –45°C
TA = 25°C
TA = 85°C
INL
(ppm
OF
V
REF
)
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