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

a		Monolithic 8-Bit
		Video A/D Converter
		AD9048

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.

FUNCTIONAL BLOCK DIAGRAM

NLINV 12							AD9048
NMINV 28
VIN	23				1
RT	18
		R			2				1	D1 (MSB)
							E
		R					N		2	D2
							C
					127		O		3	D3
							D	L
		R/2					I	A	4	D3
							N	T
RM	27
		R/2					G	C	13	D5
					128		L	H		D6
									14
							O
							G		15	D7
		R					I
					254		C		16	D8 (LSB)
		R
RB 26					255
CONVERT 17
	6	10	7	8	9	5	11	19	25
	VCC			VEE		DGND		AGND

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 Products Databook or current AD9048/883B data sheet for detailed specifications.

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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: [phone]	www.analog.com
Fax: [phone]	© Analog Devices, Inc., 2001

AD9048–SPECIFICATIONS (typical with nominal supplies unless otherwise noted)

ABSOLUTE MAXIMUM RATINGS1

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

VEE to AGND . . . . . . . . . . . . . . . . . . . +0.5 V dc to –7.0 V dc VIN, VRT or VRB to AGND . . . . . . . . . . . . . . . . . . 0.5 V to VEE 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 dc2

Applied Output Current, Externally Forced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0 mA to +6.0 mA3, 4

Output Short-Circuit Duration . . . . . . . . . . . . . . . . . 1.0 sec5 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°C6 Maximum Junction Temperature (Hermetic) . . . . . . . 150°C6 Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

ELECTRICAL CHARACTERISTICS (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
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	25°C
Differential Nonlinearity		I		0.4	0.75		0.3	0.5		0.4	0.75		0.3	0.5	LSB
	Full	VI			1.0			0.75			1.0			0.75	LSB
Integral Nonlinearity	25°C	I		0.6	0.75		0.4	0.5		0.6	0.75		0.4	0.5	LSB
	Full	VI			1.0			0.75			1.0			0.75	LSB
No Missing Codes	Full	VI	GUARANTEED			GUARANTEED			GUARANTEED			GUARANTEED
INITIAL OFFSET ERROR	25°C
Top of Reference Ladder		I		5	12		5	12		5	12		5	12	mV
	Full	VI			12			12			12			12	mV
Bottom of Reference Ladder	25°C	I		4	8		4	8		4	8		4	8	mV
	Full	VI			8			8			8			8	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;
				+0.1			+0.1			+0.1			+0.1		V
Input Bias Current7	25°C	I		36	60		36	60		36	60		36	60	µA
	Full	VI			100			100			100			100	µA
Input Resistance	25°C	I	200	300		200	300		200	300		200	300		kΩ
	Full	VI	40			40			40			40			kΩ
Input Capacitance	25°C	IV		16	20		16	20		16	20		16	20	pF
Full Power Bandwidth8	25°C	IV	10	15		10	15		10	15		10	15		MHz
REFERENCE INPUT
Positive Reference Voltage9	Full	V		0.0			0.0			0.0			0.0		V
Negative Reference Voltage9	Full	V		–2.0			–2.0			–2.0			–2.0		V
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 PERFORMANCE10	25°C
Conversion Rate		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		25	50		25	50		25	50		25	50	ps
Output Delay (tPD)	25°C	I		13	15		9	15		9	15		9	15	ns
Output Hold Time (tOH)11	25°C	I	5	8		5	8		5	8		5	8		ns
Transient Response12	25°C	IV		6	20		6	20		6	20		6	20	ns
Overvoltage Recovery Time13	25°C	V		8			8			8			8		ns
Rise Time	25°C	I			9			9			9			9	ns
Fall Time	25°C	I			14			14			14			14	ns
Output Time Skew14	25°C	I		4.5	7		4.5	7		4.5	7		4.5	7	ns
NMINV and NLINV INPUTS															µA
0.4 V Input Current	Full	VI			200			200			200			200
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°C	IV		4	6		4	6		4	6		4	6	pF
Convert Pulsewidth (LOW)	25°C	I	18			18			18			18			ns
Convert Pulsewidth (HIGH)	25°C	I	10			10			10			10			ns

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AD9048

		Test	AD9048JJ/JQ			AD9048KJ/KQ			AD9048SE/SQ			AD9048TE/TQ
Parameter (Conditions)	Temp	Level	Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Unit
AC LINEARITY
In-Band Harmonics	25°C
dc to 2.438 MHz15		I	47	50		49	55		47	50		49	55		dBc
dc to 9.35 MHz16	25°C	V		48			48			48			48		dBc
Signal-to-Noise Ratio (SNR)15	25°C
1.248 MHz Input Frequency17		I	43.5	44		45	46		43.5	44		45	46		dB
2.438 MHz Input Frequency17	25°C	I	43	44		44	46		43	44		44	46		dB
1.248 MHz Input Frequency18	25°C	I	52.5	53		54	55		52.5	53		54	55		dB
2.438 MHz Input Frequency18	25°C	I	52	53		53	55		52	53		53	55		dB
Signal-to-Noise Ratio (SNR)16	25°C
1.248 MHz Input Frequency17		I	43.5	44		45	46		43.5	44		45	46		dB
9.35 MHz Input Frequency17	25°C	V		40.5			40.5			40.5			40.5		dB
Noise Power Ratio (NPR)19	25°C	IV	36.5	39		36.5	39		36.5	39		36.5	39		dB
Differential Phase 20	25°C	IV			1			1			1			1	Degree
Differential Gain 20	25°C	IV			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 Current5	Full	VI			30			30			30			30	mA
POWER SUPPLY	25°C
Positive Supply Current		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

1Maximum 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.

2Applied voltage must be current-limited to specified range. 3Forcing voltage must be limited to specified range.

4Current is specified as negative when flowing into the device. 5Output High; one pin to ground; one second duration. 6Typical thermal impedances (no air flow) are as follows:

Ceramic DIP: θJA = 49°C/W; θJC = 15°C/W, LCC: θJA = 69°C/W; θJC = 21°C/W, JLCC: θJA = 59°C/W; θJC = 19°C/W.

To calculate junction temperature (TJ), use power dissipation (PD) and thermal impedance: TJ = PD (θJA) + TAMBIENT = PD (θJC) = + TCASE.

7Measured with VIN = 0 V and CONVERT low (sampling mode). 8Determined by beat frequency testing for no missing codes. 9VRT ≥ VRB under all circumstances.

10Outputs terminated with 40 pF and eight 10 Ω pull-up resistors. 11Interval from 50% point of leading edge CONVERT pulse to change in

output data.

12For full-scale step input, 8-bit accuracy attained in specified time. 13Recovers to 8-bit accuracy in specified time after –3 V input overvoltage. 14Output time skew includes high-to-low and low-to-high transitions as well as

bit-to-bit time skew differences.

15Measured at 20 MHz encode rate with analog input 1 dB below full scale. 16Measured at 35 MHz encode rate with analog input 1 dB below full scale. 17RMS signal to rms noise.

18Peak signal to rms noise.

19DC to 8 MHz noise bandwidth with 1.248 MHz slot; four sigma loading; 20 MHz encode.

20Clock frequency = 4 × NTSC = 14.32 MHz. Measured with 40-IRE modulated ramp.

Specifications subject to change without notice.

EXPLANATIONOFTESTLEVELS

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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