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參數(shù)資料
| 型號(hào)： | DC1500A-B |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 5/26頁(yè) |
| 文件大小： | 0K |
| 描述： | BOARD SAR ADC LTC2392-16 |
| 軟件下載： | QuikEval II System |
| 設(shè)計(jì)資源： | DC1500A Design File DC1500A Schematic |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 500k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 輸入范圍： | ±4.096 V |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 110mW @ 500kSPS |
| 工作溫度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2392-16 |
| 已供物品： | 板 |
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LTC2392-16
13
239216fa
applications inFormation
INPUT DRIVE CIRCUITS
A low impedance source can directly drive the high imped-
ance inputs of the LTC2392-16 without gain error. A high
impedance source should be buffered to minimize settling
time during acquisition and to optimize the distortion
performance of the ADC.
For best performance, a buffer amplifier should be used to
drive the analog inputs of the LTC2392-16. The amplifier
provides low output impedance to allow for fast settling
of the analog signal during the acquisition phase. It also
provides isolation between the signal source and the ADC
inputswhichdrawasmallcurrentspikeduringacquisition.
Input Filtering
The noise and distortion of the buffer amplifier and other
circuitry must be considered since they add to the ADC
noiseanddistortion.Noisyinputcircuitryshouldbefiltered
prior to the analog inputs to minimize noise. A simple
1-pole RC filter is sufficient for many applications.
Large filter RC time constants slow down the settling at
the analog inputs. It is important that the overall RC time
constants be short enough to allow the analog inputs to
completely settle to 16-bit resolution within the acquisi-
tion time (tACQ).
High quality capacitors and resistors should be used in the
RC filter since these components can add distortion. NPO
and silver mica type dielectric capacitors have excellent
linearity. Carbon surface mount resistors can generate
distortion from self heating and from damage that may
occurduringsoldering.Metalfilmsurfacemountresistors
are much less susceptible to both problems.
Single-to-Differential Conversion
For single-ended input signals, a single-ended-to-differ-
ential conversion circuit must be used to produce a differ-
ential signal at the ADC inputs. The LT6350 ADC driver is
recommendedforperformingasingle-ended-to-differential
conversion, as shown in Figure 4a. Its low noise and good
DC linearity allows the LTC2392-16 to meet full data sheet
specifications. An alternative solution using two op amps
is shown in Figure 4b. Using two LT1806 op amps, the
circuit achieves 94dB signal-to-noise ratio (SNR). For a
20kHz input signal, the input of the LTC2392-16 has been
bandwidth limited to about 25kHz.
ADC REFERENCE
A low noise, low temperature drift reference is critical to
achieving the full data sheet performance of the ADC. The
LTC2392-16 provides an excellent internal reference with
a ±20ppm/°C (max) temperature coefficient. For better
accuracy, an external reference can be used.
The high speed, low noise internal reference buffer is used
for both internal and external reference applications. It
cannot be bypassed.
Figure 4a. Recommended Single-Ended-to-Differential
Conversion Circuit Using the LT6350 ADC Driver
Figure 4b. Alternative Single-Ended-to-Differential
Conversion Circuit Using Two LT1806 Op Amps
249
301
ANALOG
INPUT
0V TO 4.096V
COMMON
MODE
VOLTAGE
301
0.013F
LTC2392-16
239216 F04b
IN+
IN–
–
+
LT1806
–
+
LT1806
249
ANALOG INPUT
0V TO 4.096V
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
249
2200pF
LTC2392-16
239216 F04a
IN+
IN–
LT6350
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DC1500A-C | 功能描述:BOARD SAR ADC LTC2391-16 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| DC1500B2 PK2 | 制造商:Duracell 功能描述:Battery, Rechargeable, Nickel Metal Hydride, AA cell, 2 pk, 1.2 V |
| DC1500B4 PK4 | 制造商:Duracell 功能描述:Battery, Rechargeable, Nickel Metal Hydride, AA cell, 4 PK, 1.2 V |
| DC1500B4N | 制造商:Duracell 功能描述:BATTERY, RECHARGEABLE, NIMH, 2.45AH; Battery Size Code:AA; Battery Capacity:2.45Ah; Battery Voltage:1.2V; Battery Technology:Nickel Metal Hydride; External Diameter:14.5mm; External Height:49.5mm; Weight:28g; Battery NEDA Code:1.2H1 |
| DC1500B4N005 | 制造商:Duracell 功能描述:AA NiMH Rechargeable Batteries - 4 pack |
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