AD9957BSVZ Analog Devices Inc, AD9957BSVZ Datasheet - Page 31

• Manufacturer Part Number: AD9957BSVZ
• Description: IC DDS 1GSPS 14BIT IQ 100TQFP
• Manufacturer: Analog Devices Inc

Specifications of AD9957BSVZ

• Resolution (bits): 14 b
• Master Fclk: 1GHz
• Tuning Word Width (bits): 32 b
• Voltage - Supply: 1.8V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Frequency Range: 60MHz To 1GHz
• Rf Type: Quadrature
• Supply Voltage Range: 1.71V To 1.89V, 3.135V To 3.465
• Rf Ic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: -40°C To +85°C
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 100
• Mounting: Surface Mount
• Case Height: 1mm
• Screening Level: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AD9957/PCBZ - BOARD EVAL AD9957 QUADRATURE MOD
• Lead Free Status / Rohs Status: Compliant

The circled numbers in Figure 44 indicate specific events,
explained as follows:
Event 1—an I/O update or profile change activates the RAM
bidirectional ramp mode.
Event 2—the RT pin switches to Logic 1. The state machine
initializes to the start address of RAM Segment Register 0 and
begins incrementing the RAM address counter.
Event 3—the RT pin remained at Logic 1 long enough for the
state machine to reach the end address of RAM Segment
Register 0, at which point the address counter is halted.
Event 4—the RT pin switches to Logic 0. The state machine
initializes to the end address of RAM Segment Register 1, resets
the internal timer, and begins decrementing the RAM address
counter.
Rev. B | Page 31 of 64
Event 5—the RT pin switches to Logic 1. The state machine
initializes to the start address of RAM Segment Register 0,
resets the internal timer, and begins incrementing the RAM
address counter.
Event 6—the RT pin switches to Logic 0. The state machine
initializes to the end address of RAM Segment Register 1, resets
the internal timer, and begins decrementing the RAM address
counter.
Event 7—the RT pin remained at Logic 0 long enough for the
state machine to reach the start address of RAM Segment
Register 1, at which point the address counter is halted.
Event 8—the RT pin switches to Logic 1. The state machine
initializes to the start address of RAM Segment Register 0,
resets the internal timer, and begins incrementing the RAM
address counter.
AD9957