MP8798AQ 查看數據表（PDF） - Exar Corporation

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MP8798AQ

CMOS Very Low Power, 1 MSPS 10-Bit Analog-to-Digital Converter with 4-Channel Mux

Exar Corporation 

MP8798

CMOS

Very Low Power, 1 MSPS 10-Bit

Analog-to-Digital Converter with 4-Channel Mux

FEATURES

BENEFITS

• 10-Bit Resolution

• Reduced Board Space (Small Package)

• 4-Channel Mux

• Reduced External Parts, No Sample/Hold Needed

• Sampling Rates from <1 kHz to 1 MHz

• Suitable for Battery & Power Critical Applications

• Very Low Power CMOS - 30 mW (typ)

• Designer can Adapt Input Range & Scaling

• Power Down; Lower Consumption – 3 mW (typ)

APPLICATIONS

• Input Range between GND and VDD

• No S/H Required for Analog Signals less than 100 kHz • µP/DSP Interface and Control Applications

• No S/H Required for CCD Signals less than 1 MHz • High Resolution Imaging – Scanners & Copiers

• Single Power Supply (4 to 6 Volts)

• Wireless Digital Communications

• Latch-Up Free

• Multiplexed Data Acquisition

• High ESD Protection: 4000 Volts Minimum

• 3 V Version: MP87L98

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 AVDD (0

to 2 V, 1 to 4 V, 0 to 5 V, etc.). The user simply sets VREF(+) and

VREF(–) 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 VREF(–) is disconnected from

VREF1(–). 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

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