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參數資料
| 型號： | XRD8799AIQ |
| 廠商： | EXAR CORP |
| 元件分類： | ADC |
| 英文描述： | LOW POWER, 2 MSPS, 10-BIT, A/D CONVERTER WITH 8-CHANNEL MUX |
| 中文描述： | 8-CH 10-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件頁數： | 1/23頁 |
| 文件大小： | 408K |
| 代理商： | XRD8799AIQ |
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
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XRD8799
LOW POWER, 2 MSPS, 10-BIT, A/D CONVERTER WITH 8-CHANNEL MUX
FEBRUARY 2001
REV. 1.00
FEATURES
10-Bit Resolution
8-Channel Mux
Sampling Rate - < 1kHz - 2MHz
Low Power CMOS - 35 mW (typ)
Power Down; Lower Consumption - 0.8 mW (typ)
Input Range between GND and V
DD
No S/H Required for Analog Signals less than
100kHz
No S/H Required for CCD Signals less than 2MHz
Single Power Supply (4.5 to 5.5V)
Latch-Up Free
ESD Protection: 2000 Volts Minimum
APPLICATIONS
μ
P/DSP Interface and Control Application
High Resolution Imaging - Scanners & Copiers
Wireless Digital Communications
Multiplexed Data Acquisition
BENEFITS
Reduced Board Space (Small Package)
Reduced External Parts, No Sample/Hold Needed
Suitable for Battery & Power Critical Applications
Designer can Adapt Input Range & Scaling
GENERAL DESCRIPTION
The XRD8799 is a flexible, easy to use, precision 10-
bit analog-to-digital converter with 8-channel mux that
operates over a wide range of input and sampling
conditions. The XRD8799 can operate with pulsed
"on demand" conversion operation or continuous
"pipeline" operation for sampling rates up to 2MHz.
The elimination of the S/H requirements, very low
power, and small package size offer the designer a
low cost solution. No sample and hold is required for
CCD applications up to 2MHz, or multiplexed input
applications when the signal source bandwidth is lim-
ited to 100kHz. The input architecture of the
XRD8799 allows direct interface to any analog input
range between AGND and AV
DD
(0 to 1V, 1 to 4V, 0 to
5V, etc.). The user simply sets V
REF(+)
and V
REF(-)
to
encompass the desired input range.
Scaled reference resistor taps @ 1/4 R, 1/2 R and 3/4
R allow for customizing the transfer curve as well as
providing a 1/2 span reference voltage. Digital out-
puts are CMOS and TTL compatible.
The XRD8799 uses a two-step flash technique. The
first segment converts the 5 MSBs and consists of
autobalanced comparators, latches, an encoder, and
buffer storage registers. The second segment con-
verts the remaining 5 LSBs.
When the power down input is "high", the data out-
puts DB9 to DB0 hold the current values and V
REF(-)
is
disconnected from V
REF1(-)
. The power consumption
during the power down mode is 0.1mW.
ORDERING INFORMATION
P
ART
N
UMBER
P
ACKAGE
O
PERATING
T
EMPERATURE
R
ANGE
XRD8799AIQ
PQFP
-40
°
C to +85
°
C
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