MP8798
CMOS
Very Low Power, 1 MSPS 10-Bit
Analog-to-Digital Converter with 4-Channel Mux
FEATURES
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10-Bit Resolution
4-Channel Mux
Sampling Rates from <1 kHz to 1 MHz
Very Low Power CMOS - 30 mW (typ)
Power Down; Lower Consumption – 3 mW (typ)
Input Range between GND and V
DD
No S/H Required for Analog Signals less than 100 kHz
No S/H Required for CCD Signals less than 1 MHz
Single Power Supply (4 to 6 Volts)
Latch-Up Free
High ESD Protection: 4000 Volts Minimum
3 V Version: MP87L98
BENEFITS
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Reduced Board Space (Small Package)
Reduced External Parts, No Sample/Hold Needed
Suitable for Battery & Power Critical Applications
Designer can Adapt Input Range & Scaling
µP/DSP
Interface and Control Applications
High Resolution Imaging – Scanners & Copiers
Wireless Digital Communications
Multiplexed Data Acquisition
APPLICATIONS
GENERAL DESCRIPTION
The MP8798 is a flexible, easy to use, precision 10-bit
Analog-to-Digital Converter with 4-channel mux that operates
over a wide range of input and sampling conditions. The
MP8798 can operate with pulsed “on demand” conversion
operation or continuous “pipeline” operation for sampling rates
up to 1 MHz. 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 charge couple
device applications, up to 1 MHz, or multiplexed input
applications when the signal source bandwidth is limited to 100
kHz. The input architecture of the MP8798 allows direct
interface to any analog input range between AGND and AV
DD
(0
to 2 V, 1 to 4 V, 0 to 5 V, etc.). The user simply sets V
REF(+)
and
V
REF(–)
to encompass the desired input range.
Scaled reference resistor tap 1/2 R allows for customizing
the transfer curve as well as providing a 1/2 span reference
voltage. Digital outputs are CMOS and TTL compatible.
The MP8798 uses a two-step flash technique. The first
segment converts the 4 MSBs and consists of 15 autobalanced
comparators, latches, an encoder, and buffer storage registers.
The second segment converts the remaining 6 LSBs.
When the power down input is “high”, the data outputs DB9 to
DB0 hold the current values and V
REF(–)
is disconnected from
V
REF1(–).
The power consumption during the power down mode
is approximately 3mW.
Specified for operation over the commercial / industrial (–40
to +85°C) temperature range, the MP8798 is available in plastic
dual-in-line (PDIP), surface mount (SOIC), and shrink small
outline (SSOP) packages.
ORDERING INFORMATION
Package
Type
SOIC
PDIP
SSOP
Temperature
Range
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
Part No.
MP8798AS
MP8798AN
MP8798AQ
DNL
(LSB)
1
1
1
INL
(LSB)
2
2
2
Rev. 3.00
1
EXAR [ EXAR CORPORATION ]
