AD7569BR-REEL

AD7569BR-REEL Datasheet


AD7569, Single DAC Output AD7669, Dual DAC Output On-Chip Bandgap Reference Fast Bus Interface Single or Dual 5 V Supplies

Part Datasheet
AD7569BR-REEL AD7569BR-REEL AD7569BR-REEL (pdf)
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AD7569TQ AD7569TQ AD7569TQ
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FEATURES 2 ADC with Track/Hold 1 DAC with Output Amplifier

AD7569, Single DAC Output AD7669, Dual DAC Output On-Chip Bandgap Reference Fast Bus Interface Single or Dual 5 V Supplies

LC2MOS Complete, 8-Bit Analog I/0 Systems

AD7569/AD7669

AD7569 FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION The AD7569/AD7669 is a complete, 8-bit, analog I/O system on a single monolithic chip. The AD7569 contains a high speed successive approximation ADC with 2 µs conversion time, a track/ hold with 200 kHz bandwidth, a DAC and an output buffer amplifier with 1 µs settling time. A temperature-compensated V bandgap reference provides a precision reference voltage for the ADC and the DAC. The AD7669 is similar, but contains two DACs with output buffer amplifiers.

A choice of analog input/output ranges is available. Using a supply voltage of +5 V, input and output ranges of zero to V and zero to volts may be programmed using the RANGE input pin. Using a ± 5 V supply, bipolar ranges of ± V or ± V may be programmed.

Digital interfacing is via an 8-bit I/O port and standard microprocessor control lines. Bus interface timing is extremely fast, allowing easy connection to all popular 8-bit microprocessors. A separate start convert line controls the track/hold and ADC to give precise control of the sampling period.

The AD7569/AD7669 is fabricated in Linear-Compatible CMOS LC2MOS , an advanced, mixed technology process combining precision bipolar circuits with low power CMOS logic. The AD7569 is packaged in a 24-pin, wide “skinny” DIP, a 24-terminal SOIC and 28-terminal PLCC and LCCC packages. The AD7669 is available in a 28-pin, plastic DIP, 28-terminal SOIC and 28-terminal PLCC package.

AD7669 FUNCTIONAL BLOCK DIAGRAM

PRODUCT HIGHLIGHTS Complete Analog I/O on a Single Chip.

The AD7569/AD7669 provides everything necessary to interface a microprocessor to the analog world. No external components or user trims are required and the overall accuracy of the system is tightly specified, eliminating the need to calculate error budgets from individual component specifications. Dynamic Specifications for DSP Users. In addition to the traditional ADC and DAC specifications, the AD7569/AD7669 is specified for ac parameters, including signal-to-noise ratio, distortion and input bandwidth. Fast Microprocessor Interface. The AD7569/AD7669 has bus interface timing compatible with all modern microprocessors, with bus access and relinquish times less than 75 ns and write pulse width less than 80 ns.

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel 617/329-4700

World Wide Web Site:

Fax 617/326-8703

Analog Devices, Inc., 1996

DAC SPECIFICATIONS1 VDD = +5 V 5% VSS2 = RANGE = AGNDDAC = AGNDADC = DGND = 0 V RL = 2 CL = 100 pF to AGNDDAC unless otherwise noted. All specifications TMIN to TMAX unless otherwise noted.

Parameter

AD7569 J, A Versions3 AD7669 J Version

AD7569 K, B Versions

AD7569 S Version T Version Units

Conditions/Comments

STATIC PERFORMANCE Resolution4 Total Unadjusted Error5 Relative Accuracy5 Differential Nonlinearity5

Unipolar Offset Error
+25°C TMIN to TMAX Bipolar Zero Offset Error
+25°C TMIN to TMAX Full-Scale Error6 AD7569 Only
+25°C TMIN to TMAX Full-Scale Error6 AD7669 Only
+25°C TMIN to TMAX DACA/DACB Full-Scale Error Match6

AD7669 Only

TA = +25°C TA = +25°C Load Regulation at Full Scale
8 ±2 ±1 ±1
±2 ±
±2 ±
±2 ±3
±3 ±
8 ±2 ± 1/2 ± 3/4
± ±2
±1 5 ±2
±1 ±2
ORDERING GUIDE

Model

Temperature Range

Relative Accuracy TMIN

Package Option1

AD7569JN AD7569JR AD7569AQ AD7569SQ2 AD7569BN AD7569KN AD7569BR AD7569BQ AD7569TQ2 AD7569JP AD7569SE2 AD7569KP AD7569TE2

AD7669AN AD7669JN AD7669JP AD7669AR AD7669JR
0°C to +70°C 0°C to +70°C to +85°C to +125°C to +85°C 0°C to +70°C to +85°C to +85°C to +125°C 0°C to +70°C to +125°C 0°C to +70°C to +125°C
to +85°C 0°C to +70°C 0°C to +70°C to +85°C 0°C to +70°C
± 1 LSB ± 1 LSB ± 1 LSB ± 1 LSB ± LSB ± LSB ± LSB ± LSB ± 1/2 LSB ± 1 LSB ± 1 LSB ± 1/2 LSB ± 1/2 LSB
± 1 LSB ± 1 LSB ± 1 LSB ± 1 LSB ± 1 LSB

N-24 R-24 Q-24 Q-24 N-24 N-24 R-24 Q-24 Q-24 P-28A E-28A P-28A E-28A

N-28 N-28 P-28A R-28 R-28

NOTES 1E = Leadless Ceramic Chip Carrier N = Plastic DIP P = Plastic Leaded Chip

Carrier Q = Cerdip R = Small Outline SOIC. 2To order MIL-STD-883, Class B processed parts, add /883B to part number.

Contact your local sales office for military data sheet.

AD7569/AD7669

PIN FUNCTION DESCRIPTION Applies to the AD7569 and AD7669 unless otherwise stated.

Pin Mnemonic

Pin Mnemonic

AGNDDAC

Analog Ground for the DAC s . Separate ground return paths are provided for the DAC s and ADC to minimize crosstalk.

VOUT

Output Voltage. VOUT is the buffered output

VOUTA, VOUTB voltage from the AD7569 DAC. VOUTA and

VOUTB are the buffered DAC output voltages
from the AD7669. Four different output volt-
age ranges can be achieved see Table I .

VSS RANGE

Negative Supply Voltage V for dual supply or 0 V for single supply . This pin is also used with the RANGE pin to select the different input/output ranges and changes the data format from binary VSS = 0 V to 2s complement VSS = V see Table I .

Range Selection Input. This is used with the VSS input to select the different ranges as per Table I. The range selected applies to both the analog input voltage of the ADC and the output voltage from the DAC s .

RESET

Reset Input Active Low . This is an asynchronous system reset that clears the DAC register s to all 0s and clears the INT line of the ADC i.e., makes the ADC ready for new conversion . In unipolar operation, this input sets the output voltage to 0 V in bipolar operation, it sets the output to negative full scale.

Data Bit Most Significant Bit MSB .

Data Bit 6 to Data Bit

DGND

Digital Ground.

Data Bit

Data Bit Least Significant Bit LSB .

Write Input Edge triggered . This is used in
conjunction with CS to write data into the
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Datasheet ID: AD7569BR-REEL 517735