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PDF WM2130 Data sheet ( Hoja de datos )
| Número de pieza | WM2130 | |
| Descripción | 10-BIT 30MSPS ANALOGUE- TO - DIGITAL CONVERTER | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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WM2130
10-bit 30MSPS Analogue-To-Digital Converter
Production Data, April 2001, Rev 1.2
DESCRIPTION
The WM2130 is a high speed 10-bit analogue-to-digital
converter and operates with independent analogue and
digital supplies of 3V to 5.5V. This device includes a high
bandwidth sample and hold and internal voltage references.
Conversion is controlled by a single clock input.
The differential-input sample and hold input gives excellent
www.DataSheet4Uco.cmomon-mode noise immunity and low distortion. The
device can also be driven in a single ended fashion.
The device provides internal reference voltages for setting
the ADC full-scale range without the requirement for
external circuitry. The WM2130 can also accept external
reference levels for applications where higher precision
references are required.
The WM2130 has also been designed to offer a speed
upgrade to users of the AD876 and a replacement for the
AD9200 and AD9202 devices. The WM2130 operates as
an AD876 in those design slots but at speeds of up to 50%
faster.
FEATURES
• 10-bit resolution ADC
• 30MSPS conversion rate
• Wide input bandwidth (150 MHz full-power bandwidth)
sample and hold input amplifier
• Independent analogue and digital supplies
• Adjustable internal voltage references
• Out of range indicator
• Low power: 87mW typical at 3V supplies
• Powerdown mode to 3mW typical
• 28-pin TSSOP package
APPLICATIONS
• Set Top Box (STB)
• IF and Baseband Digitisation
• Medical Imaging
• High speed data acquisition
BLOCK DIAGRAM
REFBF REFTF
REFSENSE
MODE
AIN
REFTS
REFBS
CLK
PRECISION
REFERENCE
CIRCUITS
WM2130
+
SHA
-
TIMING
CONTROL
ADC
OUTPUT
BUFFERS
POWER-DOWN
CONTROL
AVDD AGND
DVDD
DGND
M876B
OEB
D[9:0]
OVR
STBY
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: [email protected]
www.wolfsonmicro.com
Production Data datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd.
1 page  
Production Data
WM2130
Test Conditions:
AVDD = DVDD = 3.0V, fCLK = 30MHz, 50% Duty cycle, MODE = AVDD, REFTS = 2.5V, REFBS = 0.5V, TA = TMIN to TMAX,
unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
Analogue Reference Inputs / Outputs in Top/Bottom Mode (MODE=AVDD)
Bottom reference voltage
applied to REFBS
0
Top reference voltage applied to
REFTS
1
Differential reference input
(REFTS – REFBS)
VTB
1
www.DataSheet4U.cSRowEmiFtcBhSed input capacitance on
0.6
Switched input capacitance on
REFTS
0.6
REFBF output voltage
(AVDD -
VTB)/2
REFTF output voltage
(AVDD +
VTB)/2
Analogue Reference Inputs / Outputs in Centre-Span Mode (MODE=AVDD/2)
Reference voltage derived or
applied to VREF
1
REFBF output voltage
(AVDD -
VREF)/2
REFTF output voltage
(AVDD +
VREF)/2
Analogue Reference Inputs / Outputs in Full External Reference Mode (MODE=AGND) (Note 1)
Differential reference voltage
applied (REFTF – REFBF)
1
Reference input common mode
AVDD = 3.0V 1.3 1.5
(REFTF + REFBF) / 2
AVDD = 5.0V 2.0 2.5
Reference input resistance
680
VREF Input / Output specifications
Internal 1V reference to VREF
REFSENSE = VREF
0.95
1.0
Internal 2V reference to VREF
REFSENSE = AGND
1.9
2.0
External reference applied to
VREF pin in centre-span mode
REFSENSE = AVDD,
MODE = AVDD / 2
1
Input impedance in centre-span
mode
REFSENSE = AVDD,
MODE = AVDD / 2
18
Power Supplies
Operating supply current
IAVDD + IDVDD
AVDD = DVDD = 3V,
MODE = AGND
AVDD = DVDD = 5V
29
50
MAX
AVDD – 1
AVDD
2
2
2
1.7
3.0
1.05
2.1
2
40
UNIT
V
V
V
pF
pF
V
V
V
V
V
V
V
V
Ω
V
V
V
kΩ
mA
Standby Power
PSTBY
AVDD = DVDD = 3V,
MODE = AGND
3 5 mW
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL (Note 2)
0.2 x VDD
V
Input HIGH level
VIH
(Note 2)
0.8 x VDD
V
Notes
1. In full external reference mode the REFTF and REFTS pins should be shorted together, and the REFBF and REFBS
pins should be shorted together. Please refer to device operation examples in the device description section of the
datasheet.
2. Digital input and output levels refer to the supply used for the input/output buffer on the relevant pin. MODE refers to
the AVDD supply, all other digital input/output refers to the DVDD supply.
WOLFSON MICROELECTRONICS LTD
PD Rev 1.2 April 2001
5
5 Page 
Production Data
www.DataSheet4U.com
+FS
AVDD/2
-FS
AIN
REFTS
0.1µF
-
+
REFT =
AVDD/2 + [(+FS) - (-FS)] * GAIN/2
0.1µF
REFBS
REFTF
0.1µF
0.1µF
-
+
REFB =
AVDD/2 - [(+FS) - (-FS)] * GAIN/2
10µF
0.1µF REFBF
AVDD
REFSENSE
MODE
WM2130
Figure 8 Full External Mode with Kelvin connections (Reference Generator Disabled)
DIFFERENTIAL MODE (MODE = AVDD/2)
The WM2130 operates in differential mode when the voltage at the MODE pin is AVDD/2 (mid-
supply). The ADC reference voltages REFTF and REFBF are generated by the internal reference
buffer from VREF. Depending on the connection of the REFSENSE pin, VREF may be supplied by the
on-chip reference generator or driven by an external source, as discussed under ‘On-chip Reference
Voltage Generation’, below. REFTF and REFBF are centred around AVDD/2 by the internal
reference buffer and the voltage difference between them equals VREF.
AIN
REFTS
REFBS
+1
SAMPLE
-1/2 AND
HOLD
-1/2
REFTF = AVDD + VREF
2
ADC
CORE
VREF
AGND
INTERNAL
REFERENCE
BUFFER
REFBF = AVDD - VREF
2
Figure 9 ADC Reference Generation in Differential Mode
This mode is suitable for handling differentially presented inputs, which are applied to the AIN and
REFTS/REFBS pins. A special case of differential mode is centre span mode, in which the user
applies a single-ended signal to AIN and applies the mid-scale input voltage (VM) to the REFTS and
REFBS pins.
+FS
AIN
-FS
REFTS
AVDD/2
MODE
0.1µF
REFBS
REFTF
0.1µF
10µF 0.1µF
REFBF
REFSENSE
VREF
Figure 10 Differential Mode, 1V Reference Span
WOLFSON MICROELECTRONICS LTD
PD Rev 1.2 April 2001
11
11 Page | ||
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