Features: • 8-Bit Resolution
• Up to 10 MHz Sampling Rate
• Internal S/H Function
• Single Supply: 3.3V
• VIN DC Range: 0V to VDD
• VREF DC Range: 1V to VDD
• Low Power: 25mW typ. (excluding reference)
• Latch-Up Free
• ESD Protection: 2000V Minimum
• 20-Pin Package Available: XRD87L75Application• Digital Color Copiers
• Cellular Telephones
• CCDs and Scanners
• Video Capture BoardsPinout
Specifications
| Res (Bits) |
8 |
| Spd |
6-MSPS |
| Max P P Con. (mW) |
26mW |
| No. ofCH |
1 |
| Track/Hold |
Yes |
| Vref |
1 to 3V |
| mP Bus P=Parallel S=Serial |
8, P |
| 3V VerAvail |
Yes |
| Pkgs |
PDIP-24, SOIC-24, SSOP-24 |
VDD to GND ...................................................... 5.5V
VRT & V RB......................... VDD +0.5 to GND 0.5V
VIN .................................... VDD +0.5 to GND 0.5V
All Inputs ........................... VDD +0.5 to GND 0.5V
All Outputs ......................... VDD +0.5 to GND 0.5V
Storage Temperature ........................65 to +150
Lead Temperature (Soldering 10 seconds) ...+300
Package Power Dissipation Rating @ 75
PDIP, SOIC, SOP ................................. 675mW
Derates above 75 ........................... 12mW/
NOTES:
1. Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation at or above this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
2. Any input pin which can see a value outside the absolute maximum ratings should be protected by Schottky diode clamps (HP5082-2835) from input pin to the supplies. All inputs have protection diodes which will protect the device from short transients outside the supplies of less than 100mA for less than 100ms.
3. VDD refers to AVDD and DVDD. GND refers to AGND and DGND.
Description
The XRD87L85 is an 8-bit Analog-to-Digital Converter that operates at 3.3 V. Designed using an advanced CMOS process, this part offers excellent performance, low power consumption and latch-up free operation.
This device uses a two-step flash architecture to maintain low power consumption at high conversion rates. The input circuitry of the XRD87L85 includes an on-chip S/H function which allows this user to digitize analog input signals between GND and VDD. Careful design and chip layout have achieved a low analog input capacitance. This reduces "kickback" and eases the requirements of the buffer/amplifier used to drive the XRD87L85.
The designer can choose the internally generated reference voltages by connecting VRB to VRBS and VRT to VRTS, or provide external reference voltages to the VRB and VRT pins. The internal reference generates 0.4V at VRB and 1.72V at VRT. Providing external reference voltages allows easy interface to any input signal range between AGND and AVDD. This also allows the system to adjust these voltages to cancel zero scale and full scale errors, or to change the input range as need.
The device operates from a single +3.3 V supply +/-10%. Power consumption is 25 mW maximum at Fs=6 MHz.
XRD87L85 Data Sheet
