MP8799AE Exar Corporation, MP8799AE Datasheet

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MP8799AE

Manufacturer Part Number
MP8799AE
Description
Manufacturer
Exar Corporation
Datasheet

Specifications of MP8799AE

Case
QFP
Dc
98+
FEATURES
GENERAL DESCRIPTION
Analog-to-Digital Converter with 8-channel mux that operates
over a wide range of input and sampling conditions. The
MP8799 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 MP8799 allows direct
interface to any analog input range between AGND and AV
to 2 V, 1 to 4 V, 0 to 5 V, etc.). The user simply sets V
V
ORDERING INFORMATION
REF(–)
10-Bit Resolution
8-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
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: MP87L99
The MP8799 is a flexible, easy to use, precision 10-bit
Rev. 3.00
to encompass the desired input range.
Package
Type
PQFP
Temperature
DD
–40 to +85 C
Range
REF(+)
Analog-to-Digital Converter with 8-Channel Mux
DD
and
MP8799AE
(0
Part No.
1
for customizing the transfer curve as well as providing a 1/2 span
reference voltage.
compatible.
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.
DB0 hold the current values and V
V
is approximately 3mW.
BENEFITS
APPLICATIONS
REF1(–).
Scaled reference resistor tap @ 1/4 R, 1/2 R and 3/4 R allows
The MP8799 uses a two-step flash technique. The first
When the power down input is “high”, the data outputs DB9 to
Reduced Board Space (Small Package)
Reduced External Parts, No Sample/Hold Needed
Suitable for Battery & Power Critical Applications
Designer can Adapt Input Range & Scaling
High Resolution Imaging – Scanners & Copiers
Wireless Digital Communications
Multiplexed Data Acquisition
P/DSP Interface and Control Applications
The power consumption during the power down mode
Very Low Power, 1 MSPS, 10-Bit
(LSB)
DNL
1
Digital outputs are CMOS and TTL
(LSB)
INL
2
REF(–)
MP8799
is disconnected from
CMOS

Related parts for MP8799AE

MP8799AE Summary of contents

Page 1

... DB0 hold the current values and The power consumption during the power down mode and REF1(–). REF(+) is approximately 3mW. Temperature DNL Range Part No. (LSB) –40 to +85 C MP8799AE 1 1 MP8799 CMOS Digital outputs are CMOS and TTL is disconnected from REF(–) INL (LSB) 2 ...

Page 2

MP8799 SIMPLIFIED BLOCK AND TIMING DIAGRAM Coarse Comparators REF(+) R3 Resolution REF(–) Ladder PD V REF1(–) A IN1 MUX Decoder 8 A IN8 PIN CONFIGURATIONS See Packaging ...

Page 3

PIN OUT DEFINITIONS PIN NO. NAME DESCRIPTION 1 DB6 Data Output Bit 6 2 DB7 Data Output Bit 7 3 DGND Digital Ground 4 DGND Digital Ground 5 DV Digital CLR Clear (Active Low ...

Page 4

MP8799 ELECTRICAL CHARACTERISTICS TABLE Unless Otherwise Specified 4. AGND REF(+) REF(–) A Parameter Symbol KEY FEATURES Resolution Sampling Rate F 2 ACCURACY (A Grade) Differential Non-Linearity DNL Integral Non-Linearity INL ...

Page 5

ELECTRICAL CHARACTERISTICS TABLE (CONT’D) Parameter Symbol DIGITAL OUTPUTS Logical “1” Voltage V Logical “0” Voltage V Tristate Leakage I 1 Data Hold Time ( See Figure 1.) t HLD 1 Data Valid Delay 1 Write Pulse Width ...

Page 6

MP8799 CLOCK SAMPLE AUTO SAMPLE AUTO N–1 BALANCE N BALANCE T S ANALOG INPUT V OH DATA V OL Figure 1. MP8799 Timing Diagram THEORY OF OPERATION Analog-to-Digital Conversion The MP8799 converts analog voltages ...

Page 7

Accuracy of Conversion: DNL and INL The transfer function for an ideal A/D converter is shown in Figure 4. DIGITAL CODES 0.5 LSB OFW = 0 1 LSB 3FE 3FD 002 001 000 LSB V V001 V002 V V REF(–) ...

Page 8

MP8799 Figure 7. gives a visual definition of the INL error. The chart shows a 3-bit converter transfer curve with greatly exaggerated DNL errors to show the deviation of the real transfer curve from the ideal one. After a tester ...

Page 9

Analog Input Multiplexer The MP8799 includes a 8-Channel analog input multiplexer. The relationship between the clock, the multiplexer address, the WR and the output data is shown in Figure 10. Clock Sample N Sample M Old Address New Address t ...

Page 10

MP8799 Power Down Figure 13. shows the relationship between the clock, sampled A to output data relationship and the effect of power IN down. CLK SAMPLE DB0-DB9 N-2 Valid REF(+) Figure 13. ...

Page 11

APPLICATION NOTES Tantalum 0.1 F Chip Cap or low inductance cap Clock Transmission Line Termination Reference Voltage Source ...

Page 12

MP8799 0.1 F 100k Figure 15. Example of a Reference Voltage Source – For use Beckman Instruments #694-3-R10k resistor array or equivalent. NOTE: High R values affect the input ...

Page 13

Power Down write values to DAC DAC 4 to minimize power consumption. Figure 18. A/D Ladder and A (of V Rev. 3.00 MP8799 MP7641 A IN DAC0 IN1 A DAC7 IN IN8 MP7226 ...

Page 14

MP8799 PERFORMANCE CHARACTERISTICS Graph 1. DNL vs. Sampling Frequency Graph 3. Supply Current vs. Sampling Frequency Graph 5. DNL vs. Reference Voltage Rev. 3.00 Graph 2. INL vs. Sampling Frequency Graph 4. Power Down Current vs. Sampling Frequency Graph 6. ...

Page 15

Graph 7. Supply Current vs. Temperature Graph 9. Reference Resistance vs. Rev. 3.00 Graph 8. Power Down Current vs. Temperature Temperature 15 MP8799 ...

Page 16

MP8799 44 LEAD PLASTIC QUAD FLAT PACK SYMBOL Coplanarity = 4 mil max. Rev. 3.00 (10mm X 10mm PQFP, METRIC) QN44 D D ...

Page 17

Rev. 3.00 Notes 17 MP8799 ...

Page 18

MP8799 Rev. 3.00 Notes 18 ...

Page 19

Rev. 3.00 Notes 19 MP8799 ...

Page 20

... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...

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