参数资料
型号: LTC2452IDDB#TRPBF
厂商: Linear Technology
文件页数: 19/22页
文件大小: 0K
描述: IC ADC 16BIT DELTA SIG 8-DFN
标准包装: 2,500
位数: 16
采样率(每秒): 60
数据接口: 串行,SPI?
转换器数目: 2
功率耗散(最大): 2.4mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
供应商设备封装: 8-DFN(3x2)
包装: 带卷 (TR)
输入数目和类型: 1 个差分,双极
配用: DC1384A-A-ND - BOARD DELTA SIGMA ADC LTC2452
LTC2452
6
2452fd
For more information www.linear.com/LTC2452
applicaTions inForMaTion
block DiagraM
pin FuncTions
SCK (Pin 1): Serial Clock Input. SCK synchronizes the
serial data output. While digital data is available (the ADC
is not in CONVERT state) and CS is LOW (ADC is not in
SLEEP state) a new data bit is produced at the SDO output
pin following every falling edge applied to the SCK pin.
GND (Pin 2): Ground. Connect to a ground plane through
a low impedance connection.
REF (Pin 3): Reference Input. The voltage on REF can have
any value between 2.5V and VCC. The reference voltage
sets the full-scale range.
VCC (Pin 4): Positive Supply Voltage. Bypass to GND
(Pin 2) with a 10F capacitor in parallel with a low-series-
inductance0.1FcapacitorlocatedasclosetotheLTC2452
as possible.
IN(Pin 5), IN+ (Pin 6): Differential Analog Input.
CS (Pin 7): Chip Select (Active LOW) Digital Input. A LOW
on this pin enables the SDO digital output. A HIGH on this
pin places the SDO output pin in a high impedance state.
SDO (Pin 8): Three-State Serial Data Output. SDO is used
for serial data output during the DATA OUTPUT state and
can be used to monitor the conversion status.
Exposed Pad (Pin 9): Ground. Must be soldered to PCB
ground. For prototyping purposes, this pad may remain
floating.
Figure 1. Functional Block Diagram
16-BIT ΔΣ
A/D CONVERTER
DECIMATING
SINC FILTER
SCK
REF
VCC
GND
IN+
IN
SDO
CS
2452 BD
16-BIT ΔΣ
A/D CONVERTER
SPI
INTERFACE
INTERNAL
OSCILLATOR
3
4
7
8
1
2, 9
6
5
CONVERTER OPERATION
Converter Operation Cycle
The LTC2452 is a low power, fully differential, delta-sigma
analog-to-digital converter with a simple 3-wire SPI in-
terface (see Figure 1). Its operation is composed of three
successive states: CONVERT, SLEEP and DATA OUTPUT.
The operating cycle begins with the CONVERT state, is
followed by the SLEEP state, and ends with the DATA OUT-
PUT state (see Figure 2). The 3-wire interface consists of
serial data output (SDO), serial clock input (SCK), and the
active low chip select input (CS).
TheCONVERTstatedurationisdeterminedbytheLTC2452
conversion time (nominally 16.6 milliseconds). Once
相关PDF资料
PDF描述
LTC2453IDDB#TRPBF IC ADC 16BIT DELTA SIG 8-DFN
D38999/20FE26BA CONN HSG RCPT 26POS WALL MT SCKT
MS27499E8B44P CONN RCPT 4POS BOX MNT W/PINS
MS27499E8A44P CONN RCPT 4POS BOX MNT W/PINS
D38999/20WE26BA CONN HSG RCPT 26POS WALL MT SCKT
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