AD7564BR Analog Devices Inc, AD7564BR Datasheet

IC DAC 12BIT LC2MOS QUAD 28-SOIC

AD7564BR

Manufacturer Part Number
AD7564BR
Description
IC DAC 12BIT LC2MOS QUAD 28-SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7564BR

Rohs Status
RoHS non-compliant
Settling Time
500ns
Number Of Bits
12
Data Interface
Serial
Number Of Converters
4
Voltage Supply Source
Single Supply
Power Dissipation (max)
50µW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)

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a
GENERAL DESCRIPTION
The AD7564 contains four 12-bit DACs in one monolithic
device. The DACs are standard current output with separate
V
a single +3.3 V to +5 V supply.
The AD7564 is a serial input device. Data is loaded using
FSIN, CLKIN and SDIN. Two address pins A0 and A1 set up
a device address, and this feature may be used to simplify device
loading in a multi-DAC environment. Alternatively, A0 and A1
can be ignored and the serial out capability used to configure a
daisy-chained system.
All DACs can be simultaneously updated using the asynchro-
nous LDAC input, and they can be cleared by asserting the
asynchronous CLR input.
The device is packaged in 28-pin SOIC, SSOP and DIP
REV. A
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.
packages.
REF
FEATURES
Four 12-Bit DACs in One Package
4-Quadrant Multiplication
Separate References
Single Supply Operation
Guaranteed Specifications with +3.3 V/+5 V Supply
Low Power
Versatile Serial Interface
Simultaneous Update Capability
Reset Function
28-Pin SOIC, SSOP and DIP Packages
APPLICATIONS
Process Control
Portable Instrumentation
General Purpose Test Equipment
, I
OUT1
, I
OUT2
and R
FB
terminals. These DACs operate from
+3.3 V/+5 V, Low Power, Quad 12-Bit DAC
PRODUCT HIGHLIGHTS
1. The AD7564 contains four 12-bit current output DACs with
2. The AD7564 can be operated from a single +3.3 V to +5 V
3. Simultaneous update capability and reset function are
4. The AD7564 features a fast, versatile serial interface com-
5. Low power, 50 W at 5 V and 33 W at 3.3 V.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
CLKIN
SDIN
separate V
supply.
available.
patible with modern 3 V and 5 V microprocessors and
microcomputers.
FSIN
CONTROL LOGIC
12
NC
A0 A1
REF
FUNCTIONAL BLOCK DIAGRAM
INPUT SHIFT
REGISTER
AGND
+
inputs.
LATCH A
LATCH B
LATCH C
LATCH D
INPUT
INPUT
INPUT
INPUT
V
DD
SDOUT
DGND
12
12
12
12
LATCH
LATCH
LATCH
V
LATCH
DAC A
DAC B
DAC C
DAC D
REF
D
V
REF
C
12
12
12
12
V
REF
AD7564
AD7564
B
V
DAC A
DAC B
DAC C
DAC D
REF
Fax: 617/326-8703
LC
A
R
FB
2
A
MOS
CLR
LDAC
I
I
R
I
I
R
I
I
R
I
I
OUT1
OUT2
OUT2
OUT2
OUT1
OUT1
OUT1
OUT2
FB
FB
FB
B
C
D
A
A
B
B
C
C
D
D

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AD7564BR Summary of contents

Page 1

FEATURES Four 12-Bit DACs in One Package 4-Quadrant Multiplication Separate References Single Supply Operation Guaranteed Specifications with +3.3 V/+5 V Supply Low Power Versatile Serial Interface Simultaneous Update Capability Reset Function 28-Pin SOIC, SSOP and DIP Packages APPLICATIONS Process ...

Page 2

AD7564–SPECIFICATIONS (V = +4. +5. Normal Mode unless otherwise noted) Parameter B Grade ACCURACY Resolution 12 Relative Accuracy 0.5 Differential Nonlinearity 0.5 Gain Error + MIN MAX 2 Gain ...

Page 3

Biased Mode T , unless otherwise noted) MAX Parameter ACCURACY Resolution Relative Accuracy Differential Nonlinearity Gain Error + MIN MAX 3 Gain Temperature Coefficient Output Leakage ...

Page 4

AD7564 AC Performance Characteristics (V = +4. +5. AD843 MIN Normal Mode not subject to test.) Parameter B Grade DYNAMIC PERFORMANCE Output Voltage Settling Time 550 Digital-to-Analog Glitch Impulse ...

Page 5

Timing Specifications ( Limit at Parameter +3 180 125 7 ...

Page 6

... Although the AD7564 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Model AD7564BN AD7564BR AD7564BRS AD7564AR-B AD7564ARS DIP SOIC SSOP. DIP, SOIC and SSOP Packages + 0 ...

Page 7

Pin Number Mnemonic Description 1 DGND Digital Ground terminal for DAC C. This should normally connect to the signal ground of the system. OUT2 OUT2 3 V Positive power supply. This ...

Page 8

AD7564 TERMINOLOGY Relative Accuracy Relative accuracy or endpoint linearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function measured after ad- justing for zero error and full-scale ...

Page 9

NORMAL MODE OF OPERATION 0.4 0.3 0.2 0.1 0 – Volts REF Figure 3. Differential Nonlinearity Error vs. V (Normal Mode 20V ...

Page 10

AD7564 2 AMP = AD820 1.6 V REF 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.2 0.4 0.6 0.8 1.0 |V – – Volts REF BIAS Figure 9. ...

Page 11

GENERAL DESCRIPTION D/A Section The AD7564 contains four 12-bit current output D/A convert- ers. A simplified circuit diagram for one of the D/A converters is shown in Figure 15. V REF ...

Page 12

AD7564 BIPOLAR OPERATION 4-Quadrant Multiplication) Figure 18 shows the standard connection diagram for bipolar operation of any one of the DACs in the AD7564. The coding is offset binary as shown in Table IV. When V the circuit performs 4-quadrant ...

Page 13

MICROPROCESSOR INTERFACING AD7564 to 80C51 Interface A serial interface between the AD7564 and the 80C51 micro- controller is shown in Figure 21. TXD of the 80C51 drives SCLK of the AD7564 while RXD drives the serial data line of the ...

Page 14

AD7564 AD7564 to ADSP-2101/ADSP-2103 Interface Figure 23 shows a serial interface between the AD7564 and the ADSP-2101/ADSP-2103 digital signal processors. The ADSP- 2101 operates from 5 V while the ADSP-2103 operates from 3 V supplies. These processors are set up ...

Page 15

APPLICATIONS Programmable State Variable Filter The AD7564 with its multiplying capability and fast settling time is ideal for many types of signal conditioning applications. The circuit of Figure 25 shows its use in a state variable filter design. This type ...

Page 16

AD7564 28 1 0.200 (5.080) MAX 0.020 (0.508) 0.015 (0.381) LEADS ARE SOLDER DIPPED OR TIN-PLATED ALLOY 42 OR COPPER. 28 0.299 (7.60) 0.291 (7.39) PIN 1 1 0.01 (0.254) 0.050 (1.27) 0.006 (0.15) 28 PIN 1 0.008 (0.203) 0.002 ...

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