- 您现在的位置：买卖IC网 > PDF目录10330 > LTC2496IUHF#PBF (Linear Technology)IC ADC 16BIT DELTA SIG 38-QFN PDF资料下载
参数资料
| 型号： | LTC2496IUHF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT DELTA SIG 38-QFN |
| 标准包装： | 52 |
| 位数： | 16 |
| 采样率（每秒）： | 6.9 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 800µW |
| 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： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 管件 |
| 输入数目和类型： | 16 个单端，双极；8 个差分，双极 |
| 配用： | DC1011A-B-ND - BOARD DELTA SIGMA ADC LTC2496 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
LTC2496
2496fb
applicaTions inForMaTion
The digital input signal range is 0.5V to VCC – 0.5V. During
transitions, the CMOS input circuits draw dynamic cur-
rent. For optimal performance, application of signals to
the serial data interface should be reserved for the sleep
and data output periods.
During the conversion period, overshoot and undershoot
of fast digital signals applied to both the serial digital
interface and the external oscillator pin (fO) may degrade
the converter performance. Undershoot and overshoot
occur due to impedance mismatch of the circuit board
trace at the converter pin when the transition time of an
external control signal is less than twice the propagation
delay from the driver to the input pin. For reference, on a
regularFR-4board,thepropagationdelayisapproximately
183ps/inch. In order to prevent overshoot, a driver with
a 1ns transition time must be connected to the converter
through a trace shorter than 2.5 inches. This becomes
difficult when shared control lines are used and multiple
reflections occur.
Parallel termination near the input pin of the LTC2496 will
eliminate this problem, but will increase the driver power
dissipation. A series resistor from 27
Ω to 54Ω (depend-
ing on the trace impedance and connection) placed near
the driver will also eliminate over/undershoot without
additional driver power dissipation.
For many applications, the serial interface pins (SCK, SDI,
CS, fO) remain static during the conversion cycle and no
degradation occurs. On the other hand, if an external
oscillator is used (fO driven externally) it is active during
the conversion cycle. Moreover, the digital filter rejection
is minimal at the clock rate applied to fO. Care must be
taken to ensure external inputs and reference lines do not
cross this signal or run near it. These issues are avoided
when using the internal oscillator.
Driving the Input and Reference
The input and reference pins of the LTC2496 are connected
directly to a switched capacitor network. Depending on
the relationship between the differential input voltage and
the differential reference voltage, these capacitors are
switched between these four pins. Each time a capacitor
is switched between two of these pins, a small amount
of charge is transferred. A simplified equivalent circuit is
shown in Figure 10.
Figure 10. LTC2496 Equivalent Analog Input Circuit
I IN
V
R
AVG
IN CM
REF CM
EQ
+
( ) = ( ) =
–
(
)
(
)
.
0 5
II REF
V
R
AVG
REF
REF CM
IN CM
+
( ) ≈
+
(
)
1 5
0 5
.
–
.
(
)
(
)
EEQ
IN
REF
EQ
REF
REF CM
V
R
where
V
REF
V
–
:
(
2
=
+
))
–
,
=
=
+
+
+
REF
V
IN
IN WHERE IN AN
IN
2
DDIN ARE THE SELECTEDINPUT CHANNELS
V
IN
IN CM
+
=
(
)
––IN
=
Ω
2
R
2.98M INTERNAL OSCILLATOR
R
EQ
EEQ
12
EOSC
0.833 10
/f
EXTERNAL OSCILLATOR
=
(
)
IN+
IN–
10k
INTERNAL
SWITCH
NETWORK
10k
CEQ
12pF
10k
IIN–
REF+
IREF+
IIN+
IREF–
2496 F10
SWITCHING FREQUENCY
fSW = 123kHz INTERNAL OSCILLATOR
fSW = 0.4 fEOSC EXTERNAL OSCILLATOR
REF–
10k
100
INPUT
MULTIPLEXER
EXTERNAL
CONNECTION
100
MUXOUTP
ADCINP
EXTERNAL
CONNECTION
MUXOUTN
ADCINN
相关PDF资料 |
PDF描述 |
|---|---|
| MS27468T25B61SLC | CONN HSG RCPT 61POS JAMNUT SCKT |
| LTC2497IUHF#PBF | IC ADC 16BIT W/PGA 38-QFN |
| MS3106R20-16P | CONN PLUG 9POS STRAIGHT W/PINS |
| D38999/26FG39SNLC | CONN HSG PLUG 39POS STRGHT SCKT |
| LTC2435CGN#PBF | IC ADC DIFF I/REF 20BIT 16-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2497CUHF#PBF | 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| LTC2497CUHF#TRPBF | 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2497IUHF#PBF | 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2497IUHF#TRPBF | 功能描述:IC ADC 16BIT W/PGA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC2498CUHF | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 38-Pin QFN EP |
发布紧急采购，3分钟左右您将得到回复。