參數(shù)資料
型號： ADS7870
英文描述： 12-Bit ADC, MUX, PGA and Internal Reference DATA ACQUISITION SYSTEM
中文描述： 12位ADC，復(fù)用器，PGA和內(nèi)部基準數(shù)據(jù)采集系統(tǒng)
文件頁數(shù)： 1/27頁
文件大?。?/td> 262K
代理商： ADS7870
ADS7870
1999 Burr-Brown Corporation
PDS-1539A
Printed in U.S.A. December, 1999
FEATURES
G
16-BIT DYNAMIC RANGE
G
PGA GAINS: 1, 2, 4, 5, 8, 10, 16, 20V/V
G
4-CHANNEL DIFFERENTIAL/8-CHANNEL
SINGLE ENDED MULTIPLEXER
G
2.048V OR 2.5V INTERNAL REFERENCE
G
FAST SERIAL INTERFACE
G
HIGH THROUGHPUT RATE: 52ksamples/s
G
ERROR/OVERLOAD INDICATOR
G
2.7V TO 5.5V SINGLE-SUPPLY OPERATION
G
4-BIT DIGITAL I/O VIA SERIAL INTERFACE
G
SSOP-28 PACKAGE
DESCRIPTION
The ADS7870
(1)
is a complete low-power data acquisi-
tion system on a single chip. It consists of a 4-channel
differential/8-channel single-ended multiplexer, preci-
sion programmable gain amplifier, 12-bit successive
approximation analog-to-digital converter and a preci-
sion voltage reference.
The programmable-gain amplifier provides high input
impedance, excellent gain accuracy, good common-
mode rejection, and low noise.
For many low-level signals, no external amplification or
impedance buffering is needed between the signal
source and the A/D input.
12-Bit ADC, MUX, PGA and Internal Reference
DATA ACQUISITION SYSTEM
APPLICATIONS
G
PORTABLE/BATTERY POWERED
SYSTEMS
G
LOW POWER INSTRUMENTATION
G
LOW POWER CONTROL SYSTEMS
G
SMART SENSOR APPLICATIONS
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111
Twx: 910-952-1111 Internet: http://www.burr-brown.com/ Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
ADS7870
REF
Serial
Interface
ADS7870
DIN
SCLK
CS
CONVERT
RESET
RISE/FALL
BUSY
DOUT
Clock
Divider
Oscillator
OSC ENABLE
CCLK
BUF
OUT
/REF
IN
BUF
IN
V
REF
12-Bit
A/D
BUF
MUX
8 Ch
(4 Ch Diff.)
Analog
Inputs
Digital
I/O
Registers
and
Control
I/O 0
I/O 1
I/O 2
I/O 3
PGA
The offset voltage of the PGA is auto zeroed. Gains of
1, 2, 4, 5, 8, 10, 16 and 20V/V provide 16-bit dynamic
range and allow signals as low as 125mV to produce full
scale digital outputs.
The ADS7870 contains an internal reference, which is
trimmed for high initial accuracy and stability vs tem-
perature. Drift is typically 10ppm/
°
C. An external refer-
ence can be used in situations where multiple ADS7870s
share a common reference.
The serial interface allows the use of SPI, QSPI,
Microwire, and 8051-family protocols, without glue
logic.
NOTE: (1) Patent Pending.
For most current data sheet and other product
information, visit www.burr-brown.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS7870EA 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7870EA/1K 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7870EA/1KG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7870EA/250 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 12-Bit
ADS7870EAG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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