AD9768 datasheet(2/4 Pages) AD

Numer części	AD9768

Szczegółowy opis	Ultrahigh Speed IC D/A Converter

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Producent	AD [Analog Devices]

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REV. A

–2–

AD9768–SPECIFICATIONS

(typical @ +25 C under following conditions unless otherwise noted; nominal digital

input levels; nominal power supplies; RL = 50

; RSET = 220

; VRET = 0 V)

AD9768SD D/A Schematic

Parameter

Unit

AD9768SJD/SD/SE

RESOLUTION(FS = FULL SCALE)

Bits

8

LSB WEIGHT (CURRENT)

µA78

ACCURACY

1

Differential Nonlinearity

± % FS

0.2

Integral Nonlinearity

± % FS

0.2

Monotonicity

Guaranteed

Zero Offset (lnitial)

µA60

TEMPERATURE COEFFICIENTS

Zero Offset

ppm/

°C

1.5

Reference Voltage (–1.26 V)

ppm/

°C70

DIGITAL DATA INPUTS

Logic Compatibility

ECL

Logic Voltage Levels “l” =

V

–0.9

“0” =

V

–1.7

Coding

Binary (BIN) = Unipolar Out

Offset Binary (OBN) = Bipolar Out

OUTPUT

Current (Unipolar) FS

mA (max)

2 to 20 (30)

IOUT (@ Pin 13)

All Digital “1” Input

mA

20

All Digital “0” Input

mA

0

IOUT(@ Pin 14)

All Digital “l” Input

mA

0

All Digital “0” Input

mA

20

Compliance

V (Pin 13)

–0.7 to +3.0

V (Pin 14)

–1.1 to +3.0

Impedance

Ω (±15%)

750

SPEED PERFORMANCE

Settling Time (to 0.2% FS)

2

ns

5

Slew Rate

V/

µs

400

Update Rate

MSPS

100

Rise Time

ns

1.8

Glitch Energy

pV-sec

200

REFERENCE

Internal, Monolithic

3

V

–1.26

External, Variable

4

Voltage-Multiplying Mode

V (max)

0 to –1.1 (–2)

Current-Multiplying Mode

mA (max)

0 to –5 (–7.5 )

VOLTAGE-MULTIPLYING MODE

4 (See Figure 2)

VM Range (at Pin 16)

V

±0.5

VM Center

V

–0.6

Resistance (at Pin 16)

k

Ω

800

Transfer Function –

Measured at Pin 13; Digital “0” Applied

to Bits 1-8:

–0.1 VM Input = 0 mA IOUT

–1.1 VM Input = 0 mA IOUT

Measured at Pin 13; Digital “1” Applied

to Bits 1-8:

–0.1 VM Input = 1 mA IOUT

–1.1 VM Input = 20 mA IOUT

Large Signal Bandwidth (–3 dB Point)

kHz

250

Parameter

Unit

AD9768SJD/SD/SE

CURRENT-MULTIPLYING MODE

(See Figure 4)

IM Range (at Pins 17 & 18)

mA

0 to 5

Resistance (at Pin 18)

Ω

160

Transfer Function –

Measured at Pin 13; Digital “0” Applied

to Bits 1-8:

1 mA IM Input = 0 mA IOUT

5 mA IM Input = 0 mA IOUT

Measured at Pin 13; Digital “1” Applied

to Bits 1-8:

1 mA IM Input = 4 mA IOUT

5 mA IM Input = 20 mA IOUT

Large Signal Bandwidth (–3dB Point)

MHz

40

POWER REQUIREMENTS

–5.2 V

±0.25

mA (max)

66(70)

+5.0 V

±0.25

mA (max)

14(15)

Power Dissipation

mW (max)

410(430)

Power Supply Sensitivity

5

%/%

0.07

TEMPERATURE RANGES

6

Operating

AD9768JD

°C

0 to +70

AD9768SD/SE

°C

–55 to +125

Storage

°C

–55 to +150

THERMAL RESlSTANCE

7

Junction to Air,

θ

JA (Free Air)

°C/W

90

Junction to Case,

θ

JA

°C/W

20

PACKAGE OPTION

8

Ceramic (D-18)

AD9768JD

AD9768SD

LCC (E-20A)

AD9768SE

NOTES

1Relative to FS, including linearity (within voltage compliance limits).

2Worst case settling time; includes FS and Most Significant Bit (MSB) transitions.

3Applies when operating AD9768 as standard D/A.

4Based on R

L = 50 ohms; RSET = 220 ohms; VRET = 0 V.

51% change in either power supply voltage causes 0.07% change in analog output.

6Case temperature.

7Maximum junction temperature 125

°C.

8D = Ceramic DIP, E = Leadless Ceramic Chip Carrier.

Specifications subject to change without notice.

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