Overview
The ADV7125KST50, produced by Analog Devices Inc., is a triple high-speed digital-to-analog converter (DAC) integrated on a single monolithic chip. This device features three high-speed, 8-bit video DACs with complementary outputs, a standard TTL input interface, and high impedance analog output current sources. It operates with a single +5 V or +3.3 V power supply and requires a clock signal to function. The ADV7125KST50 also includes additional video control signals such as composite SYNC and BLANK, as well as a power-save mode. Fabricated in a 5 V CMOS process, this device ensures greater functionality with lower power dissipation and is available in 48-lead LQFP and LFCSP packages.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions |
|---|---|---|---|---|---|
| Resolution (Each DAC) | - | - | 8 Bits | - | - |
| Integral Nonlinearity (INL) | -1 LSB | ±0.4 LSB | +1 LSB | - | VAA = 5 V ± 5%, VREF = 1.235 V, RSET = 560 Ω, CL = 10 pF |
| Conversion Rate | - | - | 50 Msps | - | - |
| Max Operating Temperature | -40°C | - | 85°C | - | - |
| Max Supply Voltage | - | - | 5.25 V | - | - |
| Power Dissipation | 30 mW (Min @ 3 V) | - | - | - | - |
| Power Standby Mode | - | 6 mW (Typ @ 3 V) | - | - | - |
Key Features
- Triple high-speed, 8-bit video DACs with complementary outputs
- Standard TTL input interface and high impedance analog output current sources
- Single +5 V or +3.3 V power supply and clock required for operation
- Additional video control signals: composite SYNC and BLANK, and a power-save mode
- Fabricated in a 5 V CMOS process ensuring lower power dissipation
- Available in 48-lead LQFP and LFCSP packages
- Guaranteed monotonic to eight bits and compatible with high resolution color graphics systems (RS-343A and RS-170)
- Capable of directly driving a 37.5 Ω load, such as a doubly terminated 75 Ω coaxial cable
Applications
- Digital video systems
- High resolution color graphics
- Digital radio modulation
- Image processing
- Instrumentation
- Video signal reconstruction
Q & A
- What is the ADV7125KST50?
The ADV7125KST50 is a triple high-speed digital-to-analog converter (DAC) produced by Analog Devices Inc.
- What are the key features of the ADV7125KST50?
It includes three high-speed, 8-bit video DACs, a standard TTL input interface, high impedance analog output current sources, and additional video control signals like SYNC and BLANK. It also has a power-save mode and operates with a single +5 V or +3.3 V power supply
- What are the package options for the ADV7125KST50?
The device is available in 48-lead LQFP and LFCSP packages
- What is the maximum operating temperature of the ADV7125KST50?
The maximum operating temperature is 85°C, with an industrial temperature range of –40°C to +85°C
- What is the conversion rate of the ADV7125KST50?
The conversion rate is up to 50 Msps
- Is the ADV7125KST50 compatible with high resolution color graphics systems?
Yes, it is compatible with a wide variety of high resolution color graphics systems, including RS-343A and RS-170
- How does the ADV7125KST50 handle power dissipation?
The device has low power dissipation, with a minimum of 30 mW at 3 V, and a power standby mode of 6 mW (typical at 3 V)
- Can the ADV7125KST50 drive a 75 Ω coaxial cable directly?
Yes, each of the three RGB current outputs is capable of directly driving a 37.5 Ω load, such as a doubly terminated 75 Ω coaxial cable
- What are the additional control signals available on the ADV7125KST50?
The device includes additional video control signals such as composite SYNC and BLANK, which can be encoded onto the RGB video output
- How does the ADV7125KST50 ensure monotonicity and low glitch performance?
The use of identical current sources in a monolithic design guarantees monotonicity and low glitch performance. The on-board operational amplifier stabilizes the full-scale output current against temperature and power supply variations
