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| 型号： | DC1500A-B |
| 厂商： | Linear Technology |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | BOARD SAR ADC LTC2392-16 |
| 软件下载： | QuikEval II System |
| 设计资源： | DC1500A Design File DC1500A Schematic |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 500k |
| 数据接口： | 串行，并联 |
| 输入范围： | ±4.096 V |
| 在以下条件下的电源（标准）： | 110mW @ 500kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2392-16 |
| 已供物品： | 板 |
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LTC2392-16
12
239216fa
applications inFormation
OVERVIEW
The LTC2392-16 is a low noise, high speed 16-bit suc-
cessive approximation register (SAR) ADC. Operating
from a single 5V supply, the LTC2392-16 supports a
large ±4.096V fully differential input range, making it ideal
for high performance applications which require a wide
dynamic range. The LTC2392-16 achieves ±2LSB INL
max, no missing codes at 16 bits and 94dB SNR (typ).
The LTC2392-16 includes a precision internal reference
with a guaranteed 0.5% initial accuracy and a ±20ppm/°C
(max) temperature coefficient. Fast 500ksps throughput
with no cycle latency in both parallel and serial interface
modes makes the LTC2392-16 ideally suited for a wide
varietyofhighspeedapplications.Aninternaloscillatorsets
theconversiontime,easingexternaltimingconsiderations.
TheLTC2392-16dissipatesonly110mWat500ksps,while
both nap and sleep power-down modes are provided to
further reduce power during inactive periods.
CONVERTER OPERATION
The LTC2392-16 operates in two phases. During the ac-
quisition phase, the charge redistribution capacitor D/A
converter (CDAC) is connected to the IN+ and IN– pins
to sample the differential analog input voltage. A falling
edge on the CNVST pin initiates a conversion. During the
conversion phase, the 16-bit CDAC is sequenced through
asuccessiveapproximationalgorithm,effectivelycompar-
ing the sampled input with binary-weighted fractions of
the reference voltage (e.g., VREF/2, VREF/4 … VREF/65536)
usingthedifferentialcomparator.Attheendofconversion,
the CDAC output approximates the sampled analog input.
The ADC control logic then prepares the 16-bit digital
output code for parallel or serial transfer.
TRANSFER FUNCTION
The LTC2392-16 digitizes the full-scale voltage of 2 VREF
into216levels,resultinginanLSBsizeof125VwhenVREF
=4.096V.Theidealtransferfunctionfortwo’scomplement
is shown in Figure 2. The OB/2C pin selects either offset
binary or two’s complement format.
ANALOG INPUT
The analog inputs of the LTC2392-16 are fully differential
in order to maximize the signal swing that can be digitized.
The analog inputs can be modeled by the equivalent circuit
showninFigure3.ThediodesattheinputprovideESDpro-
tection. The analog inputs should not exceed the supply or
go below ground. In the acquisition phase, each input sees
approximately40pF(CIN)fromthesamplingCDACinseries
with 50Ω (RIN) from the on-resistance of the sampling
switch. Any unwanted signal that is common to both
inputs will be reduced by the common mode rejection of
the ADC. The inputs draw only one small current spike
while charging the CIN capacitors during acquisition.
During conversion, the analog inputs draw only a small
leakage current.
Figure 2. LTC2392-16 Two’s Complement Transfer Function
Figure 3. The Equivalent Circuit for the
Differential Analog Input of the LTC2392-16
INPUT VOLTAGE (V)
0V
OUTPUT
CODE
(T
WO’S
COMPLEMENT)
–1
LSB
239216 F02
011...111
011...110
000...001
000...000
100...000
100...001
111...110
1
LSB
BIPOLAR
ZERO
111...111
FSR/2 – 1LSB
–FSR/2
FSR = +FS – –FS
1LSB = FSR/65536
IN+
RIN
CIN
AVP
BIAS
VOLTAGE
IN–
RIN
239216 F03
CIN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1500A-C | 功能描述:BOARD SAR ADC LTC2391-16 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| 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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