Datasheet LTC1420 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 12-Bit, 10Msps, Sampling ADC |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTIO. 10Msps Sample Rate. Single 5V Supply or. 5V … |
| Dateiformat / Größe | PDF / 257 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. 10Msps Sample Rate. Single 5V Supply or. 5V Supplies. 71dB S/(N + D) and 83dB SFDR at Nyquist
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LTC1420 12-Bit, 10Msps, Sampling ADC
U FEATURES DESCRIPTIO
■
10Msps Sample Rate
The LTC®1420 is a 10Msps, 12-bit sampling A/D converter ■
Single 5V Supply or
±
5V Supplies
that draws only 250mW from either single 5V or dual ±5V ■
71dB S/(N + D) and 83dB SFDR at Nyquist
supplies. This easy-to-use device includes a high dynamic ■
100MHz Full-Power Bandwidth Sampling
range sample-and-hold, a precision reference and a PGA ■
Input PGA
input circuit. ■ Integral Nonlinearity Error <0.35LSB The LTC1420 has a flexible input circuit that allows full- ■ Differential Nonlinearity <0.25LSB scale input ranges of ±2.048V ±1.024V and ±0.512V. The ■ ±2.048V, ±1.024V and ±0.512V Bipolar Input Range input common mode voltage is arbitrary, though a 2.5V ■ Out-of-Range Indicator reference is provided for single supply applications. The ■ True Differential Inputs with 75dB CMRR input PGA has a digitally selectable 1x or 2x gain. ■ Power Dissipation: 250mW ■ 28-Pin Narrow SSOP Package Maximum DC specs include ±1LSB INL and ±1LSB DNL over temperature. Outstanding AC performance includes
U
71dB S/(N + D) and 83dB SFDR at the Nyquist input
APPLICATIO S
frequency of 5MHz. ■ Telecommunications The unique differential input sample-and-hold can acquire ■ Digital Signal Processing single-ended or differential input signals up to its 100MHz ■ Multiplexed Data Acquisition Systems bandwidth. The 75dB common mode rejection allows ■ High Speed Data Acquisition users to eliminate ground loops and common mode noise ■ Spectral Analysis by measuring signals differentially from the source. A ■ Imaging Systems separate output logic supply allows direct connection to , LTC and LT are registered trademarks of Linear Technology Corporation. 3V components. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO
5V 5V 5V OPTIONAL 3V LOGIC SUPPLY 1µF 1µF 1µF 28 7 23 22 GAIN VDD VDD OVDD
Typical INL Curve
1 +AIN 1.00 + VIN S/H PIPELINED 12-BIT ADC OF 27 0.75 2 –AIN – D11 (MSB) 10 0.50 3 VCM OUTPUT 0.25 BUFFERS DIGITAL 1 OUTPUT µF 0 DIGITAL CORRECTION MODE SELECT LOGIC D0 (LSB) 20 INL (LSBs) 4 SENSE –0.25 CLK 26 –0.50 2.5V 10MHz CLK REFERENCE –0.75 5 VREF –1.00 1µF 2.048V 0 1024 2048 3072 4096 CODE 1420 TA02 V GND GND OGND SS GND 1420 TA01 25 6 8 24 21 1µF 0V OR –5V 1420fa 1
U FEATURES DESCRIPTIO
■
10Msps Sample Rate
The LTC®1420 is a 10Msps, 12-bit sampling A/D converter ■
Single 5V Supply or
±
5V Supplies
that draws only 250mW from either single 5V or dual ±5V ■
71dB S/(N + D) and 83dB SFDR at Nyquist
supplies. This easy-to-use device includes a high dynamic ■
100MHz Full-Power Bandwidth Sampling
range sample-and-hold, a precision reference and a PGA ■
Input PGA
input circuit. ■ Integral Nonlinearity Error <0.35LSB The LTC1420 has a flexible input circuit that allows full- ■ Differential Nonlinearity <0.25LSB scale input ranges of ±2.048V ±1.024V and ±0.512V. The ■ ±2.048V, ±1.024V and ±0.512V Bipolar Input Range input common mode voltage is arbitrary, though a 2.5V ■ Out-of-Range Indicator reference is provided for single supply applications. The ■ True Differential Inputs with 75dB CMRR input PGA has a digitally selectable 1x or 2x gain. ■ Power Dissipation: 250mW ■ 28-Pin Narrow SSOP Package Maximum DC specs include ±1LSB INL and ±1LSB DNL over temperature. Outstanding AC performance includes
U
71dB S/(N + D) and 83dB SFDR at the Nyquist input
APPLICATIO S
frequency of 5MHz. ■ Telecommunications The unique differential input sample-and-hold can acquire ■ Digital Signal Processing single-ended or differential input signals up to its 100MHz ■ Multiplexed Data Acquisition Systems bandwidth. The 75dB common mode rejection allows ■ High Speed Data Acquisition users to eliminate ground loops and common mode noise ■ Spectral Analysis by measuring signals differentially from the source. A ■ Imaging Systems separate output logic supply allows direct connection to , LTC and LT are registered trademarks of Linear Technology Corporation. 3V components. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO
5V 5V 5V OPTIONAL 3V LOGIC SUPPLY 1µF 1µF 1µF 28 7 23 22 GAIN VDD VDD OVDD
Typical INL Curve
1 +AIN 1.00 + VIN S/H PIPELINED 12-BIT ADC OF 27 0.75 2 –AIN – D11 (MSB) 10 0.50 3 VCM OUTPUT 0.25 BUFFERS DIGITAL 1 OUTPUT µF 0 DIGITAL CORRECTION MODE SELECT LOGIC D0 (LSB) 20 INL (LSBs) 4 SENSE –0.25 CLK 26 –0.50 2.5V 10MHz CLK REFERENCE –0.75 5 VREF –1.00 1µF 2.048V 0 1024 2048 3072 4096 CODE 1420 TA02 V GND GND OGND SS GND 1420 TA01 25 6 8 24 21 1µF 0V OR –5V 1420fa 1