AD9750

Features:

High Performance Member of Pin-Compatible
TxDAC Product Family
125 MSPS Update Rate
10-Bit Resolution
Excellent Spurious Free Dynamic Range Performance
SFDR to Nyquist @ 5 MHz Output: 76 dBc
Differential Current Outputs: 2 mA to 20 mA
Power Dissipation: 190 mW @ 5 V
Power-Down Mode: 20 mW @ 5 V
On-Chip 1.20 V Reference
CMOS-Compatible +2.7 V to +5.5 V Digital Interface
Packages: 28-Lead SOIC and TSSOP
Edge-Triggered Latches





Application

Wideband Communication Transmit Channel:
Direct IF
Basestations
Wireless Local Loop
Digital Radio Link
Direct Digital Synthesis (DDS)
Instrumentation




Pinout






Specifications

Parameter	With Respect to	Min Max	Units
AVDD	ACOM	0.3 +6.5	V
DVDD	DCOM	0.3 +6.5	V
ACOM	DCOM	0.3 +0.3	V
AVDD	DVDD	6.5 +6.5	V
CLOCK, SLEEP	DCOM	0.3 DVDD +0.3	V
Digital Inputs	DCOM	0.3 DVDD +0.3	V
IOUTA, IOUTB	ACOM	1.0 AVDD +0.3	V
ICOMP	ACOM	0.3 AVDD +0.3	V
REFIO, FSADJ	ACOM	0.3 AVDD +0.3	V
REFLO	ACOM	0.3 +0.3	V
Junction Temperature		+150	°C
Storage Temperature		65 +150	°C
Lead Temperature(10 sec)		+300	°C

Description

The AD9750 is manufactured on an advanced CMOS process. A segmented current source architecture is combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance. Edge-triggered input latches and a 1.2 V temperature compensated bandgap reference have been integrated to provide a complete monolithic DAC solution.

The digital inputs support +2.7 V and +5 V CMOS logic families. The AD9750 is a 10-bit resolution, wideband, second generation member of the TxDAC series of high performance, low power CMOS digital-to-analog-converters (DACs). The TxDAC family, which consists of pin compatible 8-, 10-, 12-, and 14-bit DACs, is specifically optimized for the transmit signal path of communication systems. All of the devices share the same interface options, small outline package and pinout, thus providing an upward or downward component selection path based on performance, resolution and cost. The AD9750 offers exceptional ac and dc performance while supporting update rates up to 125 MSPS.

The AD9750's flexible single-supply operating range of 4.5 V to 5.5 V and low power dissipation are well suited for portable and low power applications. Its power dissipation can be further reduced to a mere 65 mW, without a significant degradation in performance, by lowering the full-scale current output. Also, a power-down mode reduces the standby power dissipation to apprixmatley 20 mW.