MUXDAC, MD657B (7.0 GHz Grade)

MD657B (7p0G) – Analog Output Mode Selectable
MUXDAC
VCCP(+1.5V)VEE/VEED/VEEA(-3.5V)VCC(GND)

24

A[0:11]_P/N

2448:12
MUX

B[0:11]_P/N

24

C[0:11]_P/N

LATCH

LSB

12-bitDAC

2

OUT_P/N24

D[0:11]_P/N

MSB

AVC
MDSL

2CKI_P/N
VTT

÷4SELECTOR÷22

CK8O_P/N
2

CK4O_P/N
2DCTL

RESET_P/N SEL1 SEL2Sleep

KEY FEATURES• 4:1 multiplexing ratio for each input bit of DAC• 12-bit resolution DAC up to 7 Gsps rate for high dynamic range applications• For digital applications, low output jitter (< 10 ps) up to 7.8 Gsps.
• DAC analog output format can be selected between Normal-Hold (NH) mode or Return-to-Zero(RZ) mode
• Complementary outputs with 50-Ω back terminations• Both complementary divide-by-4 and divide-by-8 clock outputs are provided for datasynchronization• 2.8 W power consumption• Variable 400~800 mVPP single-ended output swing• On-chip 100 ohm termination between each differential input data and RESET pair• LQFP package with exposed pad

Description
MD657B_7p0G is a high-speed 12-bit Digital to Analog Converter (DAC) integrated with a
48:12 (12 channels of 4:1) input multiplexer. The on-chip DAC can be operated at a sampling
rate up to 7 Gsps for analog applications and up to 7.8 Gsps for digital applications with low
output jitters. The analog outputs of DAC can be selected between Normal-Hold mode (for the 1stNyquist band ) or Return-to-Zero mode (for the 1st, 2nd and 3rd Nyquist band) operation. The differential
digital data input interfaces are LVPECL, LVDS, and CML compatible. After the 48 pairs ofdifferential data inputs were multiplexed up to 4 times of speed, the 12 high speed data bits arelatched and encoded to drive DAC output stage. Complementary outputs are available with 50-Ω
output back terminations. Divided-by-4 clock outputs and sampling phase selection (SEL1 andSEL2) are provided to ease the alignment of sampling phase relative to the input data. Divided Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

2MUXDAC, MD657B (7.0 GHz Grade)by-8 clock outputs are also provided. A RESET function is provided for system applications
which need to synchronize the outputs from multiple MD657B’s.

Spur Free Dynamic Range Performance
fclk = 5.5 GHz
7060

60

5050

SFDR (dBc)

SFDR (dBc)

fclk = 4.5 GHz
70

4030
20
1040
30
20
100

00

0.5

1.0

1.5

2.0

2.5

3.0

3.5

00.5

Frequency (GHz)

1.5

2.0

2.5

3.0

3.5

3.0

3.5

Frequency (GHz)fclk = 6.0 GHz

fclk = 6.5 GHz

7070

60

605050SFDR (dBc)

SFDR (dBc)

1.0

4030
20104030
20
100000.5

1.0

1.5

2.0

2.5

3.0

3.5

Frequency (GHz)

00.5

1.0

1.5

2.0

2.5

Frequency (GHz)fclk = 6.7 GHz
70

SFDR (dBc)

6050
4030
20
1000

0.5

1.0

1.5

2.0

2.5

3.0

3.5

Frequency (GHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

3MUXDAC, MD657B (7.0 GHz Grade)

Representative Measured RF Spectrum

fclk = 4.5 GHz
fout = 3/64 * fclk

Power (dBm)-40-90-4001125

Frequency (MHz)2250

fout = 19/64 * fclk

-9002250

1125

Frequency (MHz)fout = 27/64 * fclk

Power (dBm)

10Power (dBm)

10-40-90

fout = 14/64 * fclk

10Power (dBm)

10-4001125

Frequency (MHz)2250-9002250

1125

Frequency (MHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

4MUXDAC, MD657B (7.0 GHz Grade)fclk = 5.5 GHz
fout = 3/64 * fclk

Power (dBm)-40-90

fout = 11/64 * fclk

10Power (dBm)

10-40

01375

2750

-900

Frequency (MHz)Frequency (MHz)fout = 21/64 * fclk

10Power (dBm)-40-90

fout = 29/64 * fclk

Power (dBm)

1027501375-4001375

Frequency (MHz)2750-9002750

1375

Frequency (MHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

5MUXDAC, MD657B (7.0 GHz Grade)fclk = 6.0 GHz
fout = 3/64 * fclk

10Power (dBm)

Power (dBm)

10-40-90

fout = 13/64 * fclk

-40

01500

3000

-900

Frequency (MHz)fout = 21/64 * fclk

Power (dBm)-40-90

3000

fout = 29/64 * fclk

10Power (dBm)

101500Frequency (MHz)

-40

01500

Frequency (MHz)

3000-9001500
Frequency (MHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

30006MUXDAC, MD657B (7.0 GHz Grade)fclk = 6.5 GHz
fout = 7/64 * fclk

10Power (dBm)

Power (dBm)

10-40-90

fout = 15/64 * fclk

-400

1625

3250

-900

fout = 21/64 * fclk

Power (dBm)-40-90

fout = 29/64 * fclk

10Power (dBm)

1032501625

Frequency (MHz)Frequency (MHz)

-40

0

1625

Frequency (MHz)3250-9003250

1625

Frequency (MHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

7MUXDAC, MD657B (7.0 GHz Grade)fclk = 6.7 GHz
fout = 7/64 * fclk

Power (dBm)-40-90

fout = 15/64 * fclk

10Power (dBm)

10-40

01675

3350

-900

Frequency (MHz)fout = 30/64 * fclk

Power (dBm)

Power (dBm)

10-40-903350

Frequency (MHz)fout = 21/64 * fclk

101675-400167
Frequency(MHz)53350-9003350

1675

Frequency (MHz) Euvis, Inc. 3319 Old Conejo Road, Newbury Park, CA 91320
Email: sales@euvis.com Web: www.euvis.com Tel.: (805) 498-8889

8