- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄375240 > AD7877ACPZ-REEL7 (ANALOG DEVICES INC) 16-Bit, Pseudo Bipolar, Fully Diff Input, 250kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC 8-MSOP -40 to 85 PDF資料下載
參數(shù)資料
| 型號(hào)： | AD7877ACPZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | 16-Bit, Pseudo Bipolar, Fully Diff Input, 250kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC 8-MSOP -40 to 85 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, ROHS COMPLIANT, MO-220VHHD-2, LFCSP-32 |
| 文件頁(yè)數(shù)： | 19/44頁(yè) |
| 文件大小： | 1002K |
| 代理商： | AD7877ACPZ-REEL7 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)當(dāng)前第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)
AD7877
AUXILIARY INPUTS
The AD7877 has three auxiliary analog inputs, AUX1 to AUX3.
These channels have a full-scale input range from 0 V to V
REF
.
The ADC channel addresses for AUX1 to AUX3 are 0011b,
0100b, and 0101b, and the results are stored in Registers 10011b,
10100b, and 10101b. These pins can also be reconfigured as
general-purpose logic inputs/outputs, as described in the GPIO
Configuration section.
Rev. A | Page 19 of 44
LIMIT COMPARISON
The AUX1 measurement, the two battery measurements, and
the TEMP1 measurement can all be compared with high and
low limits, and an out-of-limit result made to generate an alarm
output at the ALERT pin. The limits are stored in registers with
addresses from 00100b to 01011b. After a measurement from
any one of the four channels is converted, it is compared with
the corresponding high and low limits. An out-of-limit result
sets one of the status bits in the alert status/enable register. For
details on these and other registers, see the Register Maps and
Detailed Register Descriptions sections. For details on writing
and reading data, see the Serial Interface section.
As mentioned previously, the temperature comparison is made
using the result of the TEMP1 measurement, which is the diode
forward voltage. Because the temperature coefficient of the
diode is known but the actual forward voltage can have a wide
tolerance, it is not possible to program the high and low limit
registers with predetermined values.
Instead, it is necessary to calibrate the temperature measure-
ment, calculate the TEMP1 readings at the high and low limit
temperatures, and then program those values into the limit
registers, as follows:
1.
Calculate
LSB per degree
=
2.1 mV/(
V
REF
/4096).
2.
Save the calibration reading
D
CAL
at calibration temperature
T
CAL
.
3.
Subtract
T
CAL
from limit temperatures
T
HIGH
and
T
LOW
to get
the difference in degrees between the limit temperatures
and the calibration temperature.
4.
Multiply this value by
LSB per degree
to get the value in
LSBs.
5.
Add these values to the digital value at the calibration
temperature to get the digital high and low limit values.
Example:
The internal 2.5 V reference is used.
1.
T
HIGH
= +65°C and
T
LOW
=
10°C.
2.
LSB per degree
=
2.1 × 10
3
/(2.5/4096) =
3.44.
3.
D
CAL
= 983 decimal at 25°C.
4.
D
HIGH
= (65
25) ×
3.44 + 983 = 845.
5.
D
LOW
= (
10
25) ×
3.44 + 983 = 1103.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7877 | Touch Screen Controller |
| AD7877ACP-500RL7 | Touch Screen Controller |
| AD7877ACP-REEL | Touch Screen Controller |
| AD7877ACP-REEL7 | Touch Screen Controller |
| AD7877ACPZ-500RL7 | Touch Screen Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7877WACPZ-REEL7 | 功能描述:IC CTRLR TOUCH SCREEN 32LFCSP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 類(lèi)型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7878 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:LC2MOS Complete 12-Bit 100 kHz Sampling ADC with DSP Interface |
| AD7878AQ | 制造商:Rochester Electronics LLC 功能描述:COMPLETE 12 BIT ADC IC - Bulk |
| AD7878BQ | 功能描述:IC ADC 12BIT W/DSP INT 28-CDIP RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:250 系列:- 位數(shù):12 采樣率（每秒）:1.8M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:1.82W 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:48-LQFP 供應(yīng)商設(shè)備封裝:48-LQFP（7x7） 包裝:管件 輸入數(shù)目和類(lèi)型:2 個(gè)單端，單極 |
| AD7878JN | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel 28-Pin PDIP W 制造商:Rochester Electronics LLC 功能描述:COMPLETE 12 BIT ADC IC - Bulk 制造商:Analog Devices 功能描述:LC2MOS Complete 12-Bit 100 kHz Sampling ADC with DSP Interface |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。