- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10094 > LTC2297IUP#TRPBF (Linear Technology)IC ADC DUAL 14BIT 40MSPS 64QFN PDF資料下載
參數(shù)資料
| 型號： | LTC2297IUP#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DUAL 14BIT 40MSPS 64QFN |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 40M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 285mW |
| 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： | 64-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 64-QFN（9x9） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個單端，雙極; 2 個差分, 雙極 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當(dāng)前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LTC2298/LTC2297/LTC2296
19
229876fa
APPLICATIO S I FOR ATIO
WU
UU
Reference Operation
Figure 9 shows the LTC2298/LTC2297/LTC2296 refer-
ence circuitry consisting of a 1.5V bandgap reference, a
difference amplifier and switching and control circuit. The
internal voltage reference can be configured for two pin
selectable input ranges of 2V (
±1V differential) or 1V
(
±0.5V differential). Tying the SENSE pin to VDD selects
the 2V range; tying the SENSE pin to VCM selects the 1V
range.
The 1.5V bandgap reference serves two functions: its
output provides a DC bias point for setting the common
mode voltage of any external input circuitry; additionally,
the reference is used with a difference amplifier to gener-
ate the differential reference levels needed by the internal
ADC circuitry. An external bypass capacitor is required for
the 1.5V reference output, VCM. This provides a high
frequency low impedance path to ground for internal and
external circuitry.
The difference amplifier generates the high and low refer-
ence for the ADC. High speed switching circuits are
connected to these outputs and they must be externally
bypassed. Each output has two pins. The multiple output
pins are needed to reduce package inductance. Bypass
capacitors must be connected as shown in Figure 9. Each
ADC channel has an independent reference with its own
bypass capacitors. The two channels can be used with the
same or different input ranges.
Other voltage ranges between the pin selectable ranges
can be programmed with two external resistors as shown
in Figure 10. An external reference can be used by applying
its output directly or through a resistor divider to SENSE.
It is not recommended to drive the SENSE pin with a logic
device. The SENSE pin should be tied to the appropriate
level as close to the converter as possible. If the SENSE pin
is driven externally, it should be bypassed to ground as
close to the device as possible with a 1
F ceramic capacitor.
For the best channel matching, connect an external reference
to SENSEA and SENSEB.
Figure 10. 1.5V Range ADC
Figure 9. Equivalent Reference Circuit
VCM
REFH
SENSE
TIE TO VDD FOR 2V RANGE;
TIE TO VCM FOR 1V RANGE;
RANGE = 2 VSENSE FOR
0.5V < VSENSE < 1V
1.5V
REFL
2.2
F
2.2
F
INTERNAL ADC
HIGH REFERENCE
BUFFER
0.1
F
229876 F09
4
DIFF AMP
1
F
1
F
INTERNAL ADC
LOW REFERENCE
1.5V BANDGAP
REFERENCE
1V
0.5V
RANGE
DETECT
AND
CONTROL
LTC2298/LTC2297/LTC2296
VCM
SENSE
1.5V
0.75V
2.2
F
12k
1
F
12k
229876 F10
LTC2298
LTC2297
LTC2296
Input Range
The input range can be set based on the application. The
2V input range will provide the best signal-to-noise perfor-
mance while maintaining excellent SFDR. The 1V input
range will have better SFDR performance, but the SNR will
degrade by 5.8dB. See the Typical Performance Charac-
teristics section.
Driving the Clock Input
The CLK inputs can be driven directly with a CMOS or TTL
level signal. A sinusoidal clock can also be used along with
a low jitter squaring circuit before the CLK pin (Figure 11).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VI-23R-IX-B1 | CONVERTER MOD DC/DC 7.5V 75W |
| MS3106A18-22SW | CONN PLUG 3POS STRAIGHT W/SCKT |
| AD7828BQ | IC ADC 8BIT 8CH HS 28-CDIP |
| IDT72225LB15PF8 | IC FIFO 1024X18 SYNC 15NS 64TQFP |
| AD7876BR-REEL7 | IC ADC 12BIT SAMPLING 10V 24SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2297UP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 14-Bit, 65/40/25Msps Low Power 3V ADCs |
| LTC2298 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 14-Bit, 65/40/25Msps Low Power 3V ADCs |
| LTC2298CUP | 制造商:Linear Technology 功能描述:ADC Dual Pipelined 65Msps 14-bit Parallel 64-Pin QFN EP |
| LTC2298CUP#PBF | 功能描述:IC ADC DUAL 14BIT 65MSPS 64QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| LTC2298CUP#TR | 制造商:Linear Technology 功能描述:ADC Dual Pipelined 65Msps 14-bit Parallel 64-Pin QFN EP T/R |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。