Analog Devices AD9048TQ, AD9048TE, AD9048SQ, AD9048SE, AD9048KQ Datasheet

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Monolithic 8-Bit

FEATURES 35 MSPS Encode Rate 16 pF Input Capacitance 550 mW Power Dissipation Industry-Standard Pinouts MIL-STD-883 Compliant Versions Available

APPLICATIONS Professional Video Systems Special Effects Generators Electro-Optics Digital Radio Electronic Warfare (ECM, ECCM, ESM)

GENERAL DESCRIPTION

The AD9048 is an 8-bit, 35 MSPS flash converter, made on a high speed bipolar process, which is an alternate source for the TDC1048 unit, offers enhancements over its predecessor. Lower power dissipation makes the AD9048 attractive for a variety of system designs.

Because of its wide bandwidth, it is an ideal choice for real-time conversion of video signals. Input bandwidth is flat with no missing codes.

Clocked latching comparators, encoding logic and output buffer registers operating at minimum rates of 35 MSPS preclude a need for a sample-and-hold (S/H) or track-and-hold (T/H) in most system designs using the AD9048. All digital control inputs and outputs are TTL compatible.

Devices operating over two ambient temperature ranges and with two grades of linearity are available. Linearities of either

0.5 LSB or 0.75 LSB can be ordered for a commercial range of 0°C to 70°C or extended case temperatures of –55°C to +125°C.

Video A/D Converter

AD9048

FUNCTIONAL BLOCK DIAGRAM

NLINV

NMINV

CONVERT

R/2

6 10

127

128

254

255

8 9

Commercial versions are packaged in 28-lead DIPs; extended temperature versions are available in ceramic DIP and ceramic LCC packages. Both commercial units and MIL-STD-883 units are standard products.

The AD9048 A/D converter is available in versions compliant with MIL-STD-883. Refer to the Analog Devices Military Prod- ucts Databook or current AD9048/883B data sheet for detailed specifications.

AD9048

E N C O D

H L O G

DGND AGND

D1 (MSB)

D8 (LSB)

REV. E

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 that 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: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001

AD9048–SPECIFICATIONS

(typical with nominal supplies unless otherwise noted)

ABSOLUTE MAXIMUM RATINGS

VCC to DGND . . . . . . . . . . . . . . . . . . . –0.5 V dc to +7.0 V dc

AGND to DGND . . . . . . . . . . . . . . . . –0.5 V dc to +0.5 V dc

to AGND . . . . . . . . . . . . . . . . . . . +0.5 V dc to –7.0 V dc

, VRT or VRB to AGND . . . . . . . . . . . . . . . . . . 0.5 V to V

VRT to VRB . . . . . . . . . . . . . . . . . . . . . . –2.2 V dc to +2.2 V dc

CONV, NMINV or NLINV to DGND –0.5 V dc to +5.5 V dc Applied Output Voltage to DGND . . –0.5 V dc to +5.5 V dc Applied Output Current, Externally Forced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0 mA to +6.0 mA

ELECTRICAL CHARACTERISTICS

Parameter (Conditions) Temp Level Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit

RESOLUTION 8 8 8 8 Bits

DC ACCURACY

Differential Nonlinearity 25°C I 0.4 0.75 0.3 0.5 0.4 0.75 0.3 0.5 LSB

Integral Nonlinearity 25°C I 0.6 0.75 0.4 0.5 0.6 0.75 0.4 0.5 LSB

No Missing Codes Full VI GUARANTEED GUARANTEED GUARANTEED GUARANTEED

INITIAL OFFSET ERROR

Top of Reference Ladder 25°CI 512 512 512 512mV

Bottom of Reference Ladder 25°CI 48 48 48 48 mV

Offset Drift Coefficient Full V 20 20 20 20 µV/°C

ANALOG INPUT

Input Voltage Range Full V –2.1; –2.1; –2.1; –2.1;

Input Bias Current

Input Resistance 25°C I 200 300 200 300 200 300 200 300 kΩ

Input Capacitance 25°C IV 1620 1620 1620 1620 pF Full Power Bandwidth

REFERENCE INPUT

Positive Reference Voltage Negative Reference Voltage Differential Reference Voltage Full V 2.0 2.0 2.0 2.0 V Reference Ladder Resistance Full VI 30 60 125 30 60 125 30 60 125 30 60 125 Ω Ladder Temperature Coefficient Full V 0.22 0.22 0.22 0.22 Ω/°C Reference Ladder Current Full VI 23 40 23 40 23 40 23 40 mA Reference Input Bandwidth 25°C V 10 10 10 10 MHz

DYNAMIC PERFORMANCE

Conversion Rate 25°C I 35 38 35 38 35 38 35 38 MHz Aperture Delay 25°C IV 2.4 5 2.4 5 2.4 5 2.4 5 ns Aperture Uncertainty (Jitter) 25°C IV 2550 2550 2550 2550 ps Output Delay (tPD)25°C I 13 15 9 15 9 15 9 15 ns Output Hold Time (tOH) Transient Response Overvoltage Recovery Time Rise Time 25°CI 9 9 9 9 ns Fall Time 25°C I 14 14 14 14 ns Output Time Skew

NMINV and NLINV INPUTS

0.4 V Input Current Full VI 200 200 200 200 µA

2.4 V Input Current Full VI 150 150 150 150 µA

5.5 V Input Current Full VI 150 150 150 150 µA

CONVERT INPUT

Logic “1” Voltage Full VI 2.0 2.0 2.0 2.0 V Logic “0” Voltage Full VI 0.8 0.8 0.8 0.8 V Logic “1” Current Full VI 150 150 150 150 µA Logic “0” Current Full VI 500 500 500 500 µA Input Capacitance 25°CIV4646 4646pF Convert Pulsewidth (LOW) 25°C I 18 18 18 18 ns Convert Pulsewidth (HIGH) 25°C I 10 10 10 10 ns

Output Short-Circuit Duration . . . . . . . . . . . . . . . . . 1.0 sec

Operating Temperature Range (Ambient)

AD9048JJ/KJ/JQ/KQ . . . . . . . . . . . . . . . . . . . . 0°C to 70°C

AD9048SE/SQ/TE/TQ . . . . . . . . . . . . . . –55°C to +125°C

Maximum Junction Temperature (Plastic) . . . . . . . . . 150°C

Maximum Junction Temperature (Hermetic) . . . . . . . 150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

3, 4

(VCC = +5.0 V; VEE = –5.2 V; Differential Reference Voltage = 2.0 V, unless otherwise noted)

Test AD9048JJ/JQ AD9048KJ/KQ AD9048SE/SQ AD9048TE/TQ

Full VI 1.0 0.75 1.0 0.75 LSB

Full VI 12 12 12 12 mV

Full VI 8 8 8 8 mV

25°C I 36 60 36 60 36 60 36 60 µA Full VI 100 100 100 100 µA

Full VI 40 40 40 40 kΩ

25°CIV1015101510151015MHz

Full V 0.0 0.0 0.0 0.0 V Full V –2.0 –2.0 –2.0 –2.0 V

25°CI 58 58 58 58 ns 25°C IV 6 20 6 20 6 20 6 20 ns 25°CV88 88ns

25°C I 4.5 7 4.5 7 4.5 7 4.5 7 ns

+0.1 +0.1 +0.1 +0.1 V

–2–

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AD9048

Parameter (Conditions) Temp Level Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit

Test AD9048JJ/JQ AD9048KJ/KQ AD9048SE/SQ AD9048TE/TQ

AC LINEARITY

In-Band Harmonics

dc to 2.438 MHz dc to 9.35 MHz

Signal-to-Noise Ratio (SNR)

25°C I 47 50 49 55 47 50 49 55 dBc 25°C V 48 48 48 48 dBc

1.248 MHz Input Frequency1725°C I 43.5 44 45 46 43.5 44 45 46 dB

2.438 MHz Input Frequency1725°C I 43 44 44 46 43 44 44 46 dB

1.248 MHz Input Frequency1825°C I 52.5 53 54 55 52.5 53 54 55 dB

2.438 MHz Input Frequency1825°C I 52 53 53 55 52 53 53 55 dB

Signal-to-Noise Ratio (SNR)

1.248 MHz Input Frequency1725°C I 43.5 44 45 46 43.5 44 45 46 dB

9.35 MHz Input Frequency Noise Power Ratio (NPR) Differential Phase Differential Gain

25°C V 40.5 40.5 40.5 40.5 dB 25°C IV 36.5 39 36.5 39 36.5 39 36.5 39 dB 25°C IV 1 1 1 1 Degree 25°CIV 2 2 2 2 %

DIGITAL OUTPUTS

Logic “1” Voltage Full VI 2.4 2.4 2.4 2.4 V Logic “0” Voltage Full VI 0.5 0.5 0.5 0.5 V Short Circuit Current

Full VI 30 30 30 30 mA

POWER SUPPLY

Positive Supply Current 25°C I 34 56 34 56 34 56 34 56 mA

Full VI 58 58 58 58 mA

Negative Supply Current 25°C I 90 110 90 110 90 110 90 110 mA

Full VI 120 120 120 120 mA Nominal Power Dissipation 25°C V 550 550 550 550 mW Reference Ladder Dissipation 25°C V 45 45 45 45 mW

NOTES

Maximum ratings are limiting values to be applied individually, and beyond which the serviceability of the device may be impaired. Functional operation under any of these conditions is not necessarily implied. Exposure to absolute maximum rating conditions for extended periods of time may affect device reliability.

Applied voltage must be current-limited to specified range.

Forcing voltage must be limited to specified range.

Current is specified as negative when flowing into the device.

Output High; one pin to ground; one second duration.

Typical thermal impedances (no air flow) are as follows: Ceramic DIP: θJA = 49°C/W; JLCC: θJA = 59°C/W; θJC = 19°C/W.

θJC = 15°C/W, LCC: θJA = 69°C/W;

= 21°C/W,

To calculate junction temperature (TJ), use power dissipation (PD) and thermal impedance: TJ = PD (θJA) + T

Measured with VIN = 0 V and CONVERT low (sampling mode).

Determined by beat frequency testing for no missing codes.

VRT ≥ VRB under all circumstances.

= PD (θJC) = + T

AMBIENT

CASE

Outputs terminated with 40 pF and eight 10 Ω pull-up resistors.

Interval from 50% point of leading edge CONVERT pulse to change in

output data.

For full-scale step input, 8-bit accuracy attained in specified time.

Recovers to 8-bit accuracy in specified time after –3 V input overvoltage.

Output time skew includes high-to-low and low-to-high transitions as well as

bit-to-bit time skew differences.

Measured at 20 MHz encode rate with analog input 1 dB below full scale.

Measured at 35 MHz encode rate with analog input 1 dB below full scale.

RMS signal to rms noise.

Peak signal to rms noise.

DC to 8 MHz noise bandwidth with 1.248 MHz slot; four sigma loading;

20 MHz encode.

Clock frequency = 4 × NTSC = 14.32 MHz. Measured with 40-IRE

modulated ramp.

Specifications subject to change without notice.

EXPLANATION OF TEST LEVELS

Test Level I – 100% production tested. Test Level II – 100% production tested at 25°C and

sample tested at specific temperatures. Test Level III – Sample tested only. Test Level IV – Parameter is guaranteed by design and

characterization testing. Test Level V – Parameter is a typical value only. Test Level VI – All devices are 100% production tested at

25°C. 100% production tested at temperature

extremes for military temperature devices;

sample tested at temperature extremes for

commercial/industrial devices.

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