Features: • 14-bit resolution ADC
• 8 MSPS conversion rate
• Differential input
• 3.3V single supply
• Very low current power down mode - 20A typical
• Microprocessor compatible parallel interface
• Internal or external voltage reference
• High bandwidth sample and hold amplifier- 140MHz full-power bandwidth
• Programmable Gain Amplifier (PGA)
• Programmable DC offset
• Binary or two's complement output format
• Out of range indicator
• 48-pin TQFP package, body thickness 1mmApplication• Communications
• xDSL Front ends
• Industrial control
• InstrumentationPinout
Specifications
| CONDITION |
MIN |
MAX |
| Analogue Supply Voltage (AVDD to AGND) |
-0.3 |
4 V |
| Digital Supply Voltage (DVDD to DGND) |
-0.3 |
4 V |
| Reference Input Voltage Range (VBG) |
AGND -0.3V |
AVDD +0.3V |
| Analogue Inputs Voltage Range |
AGND -0.3V |
AVDD +0.3V |
| Digital Inputs Voltage Range |
DGND -0.3V |
DVDD +0.3V |
| Operating temperature range, TA |
C suffix |
0°C
-40°C |
70°C
85°C |
| I suffix |
| Storage temperature |
-65°C |
150°C |
| Lead temperature 1.6mm (1/16 inch) soldering for 10 seconds |
|
260°C |
DescriptionThe WM2148 is a 14-bit, 8 MSPS analogue to digitalconverter with an on-chip voltage reference, high bandwidthsample and hold amplifier and programmable gain. Theanalogue input is differential, giving excellent commonmodenoise immunity and low distortion.
The WM2148 is designed for use in highly integrated, lowpower3.3V systems. A high speed, microprocessorcompatible parallel interface allows control of the ADC inputgain, digital DC offset, internal / external reference andoutput data format. Both binary and two's complementformats are supported. The device also features an out ofrange indicator pin to show when the input signal exceedsthe converter's full-scale range.
In Power Down mode, all analogue circuitry is internallydisconnected from the power supply, reducing total supplycurrent to 20A.
The WM2148 is available in a 1mm thin 48-pin TQFPpackage in standard commercial and industrial temperatureranges.
WM2148 Data Sheet
