RHF1201 STMICROELECTRONICS [STMicroelectronics], RHF1201 Datasheet

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RHF1201

Manufacturer Part Number
RHF1201
Description
Rad-hard 12-bit 0.5 to 50 Msps A/D converter
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
Features
Applications
Description
The RHF1201 is a 12-bit 50MHz maximum
sampling frequency analog to digital converter
using pure (ELDRS-free) CMOS 0.25µm
technology combining high performance, radiation
robustness and very low power consumption.
The RHF1201 is based on a pipeline structure
and digital error correction to provide excellent
static linearity and achieve 10.3 effective bits at
F
June 2007
S
= 50Msps, and F
Wide sampling range: 0.5Msps to 50Msps
Optimwatt
44mW @ 0.5Msps, 100mW @ 50Msps
Input range: 2 V
SFDR up to 75dB @
F
2.5V / 3.3V compatible digital I/O
Built-in reference voltage with external bias
capability
Hermetic package
Rad-hard: 300 kRad(Si) TID
Failure immune (SEFI) and latchup immune
(SEL) up to 120 MeV-cm
125°C
Qml-V qualified, smd 5962-05217
Digital communication satellites
Space data acquisition systems
Aerospace instrumentation
Nuclear and high-energy physics
in
= 15MHz
TM
adaptive power:
pp
in
= 15MHz.
differential
F
S
= 50Msps,
2
/mg at 2.7V and
Rad-hard 12-bit 0.5 to 50 Msps A/D converter
Rev 2
Specifically designed for optimizing power
consumption, the RHF1201 can dissipate as little
as 100mW at 50Msps, while maintaining a high
level of performance.
It integrates a proprietary track-and-hold structure
to ensure IF-sampling applications up to 150
MHz.
A voltage reference is integrated in the circuit to
simplify the design and minimize external
components. A tri-state capability is available on
the outputs to allow common bus sharing. Output
data can be coded in two different formats.
A Data Ready signal which is raised when the
data is valid on the output can be used for
synchronization purposes.
The RHF1201 is available in -55° C to +125° C
temperature range, in a small 48-pin hermetic
SO-48 package.
24
Pin connections (top view)
1
SO-48 package
RHF1201
48
25
www.st.com
1/18
18

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RHF1201 Summary of contents

Page 1

... Output data can be coded in two different formats. A Data Ready signal which is raised when the data is valid on the output can be used for synchronization purposes. The RHF1201 is available in -55° +125° C temperature range small 48-pin hermetic SO-48 package. Rev 2 RHF1201 ...

Page 2

... Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 Timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 6 6 Electrical characteristics (unchanged after 300kRad Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7.1 RHF1201 operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7.2 Driving the analog input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.2.1 7.2.2 7.2.3 7.3 Reference connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7.3.1 7.3.2 7.4 Clock input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.5 Power consumption optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 ...

Page 3

... RHF1201 1 Block diagram Figure 1. Block diagram VIN INCM VINB CLK 2 Pin connections Figure 2. Pin connections (top view) +2.5V +2.5V/3.3V stage stage 1 2 Sequencer-phase shifting Timing Digital data correction GND Block diagram ...

Page 4

... V/3 Non connected 44 CC Non connected 45 DGND 2.5 V/3 CLK DGND 2 DGND RHF1201 Description Observation 2.5 V/3.3 V CMOS Slew rate control input input 2.5 V/3.3 V CMOS Output Enable input input 2.5 V/3.3 V CMOS Data Format Select input input Analog power supply 2.5 V Analog power supply 2.5 V Analog ground ...

Page 5

... RHF1201 4 Timing characteristics Table 2. Timing table Symbol F Sampling frequency S T Sampling clock cycle ck DC Clock duty cycle T Clock pulse width (high Clock pulse width (low) C2 Data output delay (fall clock to data valid) T Data pipeline delay pd Data ready delay after data ...

Page 6

... Forced top voltage V REFP reference Bottom internal reference V REFM voltage 6/18 Parameter (1) (1) (1) (1) - HBM Parameter Test conditions Values 3.6 -100 to 100 -65 to +150 Min Typ Max 2.3 2.5 2.7 2.3 2.5 2.7 2.3 2.5 2.7 2.3 2.5 3.4 0 0.5 RHF1201 Unit °C °C/W kV Unit ...

Page 7

... RHF1201 6 Electrical characteristics (unchanged after 300kRad) Test conditions, unless otherwise specified are MHz Table 5. Analog inputs Symbol Parameter V -V Full scale reference voltage IN INB C Input capacitance in R Input resistance in Effective resolution ERB (1) bandwidth 1. See Section 8: Definitions of specified parameters on page 14 Table 6 ...

Page 8

... MHz 145 MHz MHz MHz 145 MHz MHz MHz 145 MHz in for more information. RHF1201 Min Typ Max 0 0.2 V CCBE - 0.2 - Min Typ Max ±0.3 ±0.5 ±1.7 Guaranteed Min Typ Max -75 -63 -70 -57 ...

Page 9

... RHF1201 7 Application information The RHF1201 is a high speed analog to digital converter based on a pipeline architecture and a 0.25 µm CMOS process to achieve the best performance in terms of linearity and power consumption. The pipeline structure consists of 11 internal conversion stages in which the analog signal is fed and sequentially converted into digital data. Signal input is sampled on the rising edge of the clock ...

Page 10

... Driving the analog input 7.2.1 Differential inputs The RHF1201is designed to obtain optimum performance when driven on differential inputs transformer is an efficient way of achieving this high performance. Figure 4: Differential input configuration the primary of the transformer, while the secondary drives both ADC inputs. The common ...

Page 11

... In particular, the Track-and-Hold in the first stage of the pipeline is designed to minimize the linearity limitations as analog frequency increases.This is achieved by making the input impedance independent from the input frequency result, the RHF1201 can maintain high performance analog frequency of 150 MHz. ADT1-1 ...

Page 12

... VREFP VIN RHF1201 VINB VREFM to obtain optimum performance. 1kΩ VCCA VREFP VIN external reference RHF1201 VINB VREFM is internally set to a voltage close to REFP in order to minimize low and high for the schematics. 330pF 470nF 10nF Figure 7: External 470nF 330pF 10nF RHF1201 ...

Page 13

... Power consumption optimization The internal architecture of the RHF1201 makes it possible to optimize power consumption according to the sampling frequency of the application. For this purpose, an External R resistor is placed between the IPOL pin and the analog Ground. Therefore, the total dissipation can be adjusted across all the sampling range 0.5 Msps to 50 Msps to fulfil the requirements of applications where power saving is a must ...

Page 14

... The effective number of bits (ENOB) is easily deduced from the SINAD, using the formula: SINAD = 6.02 × ENOB + 1.76 dB. When the applied signal is not full scale (FS), but has an amplitude A expression becomes: SINAD = 6.02 × ENOB + 1. log (2A The ENOB is expressed in bits. 14/ excluding DC, fundamental and the first five s /FS) 0 RHF1201 , the SINAD 0 ...

Page 15

... RHF1201 Effective resolution bandwidth For a given sampling rate and clock jitter, the analog input frequency at which the SINAD is reduced of 3 dB. Pipeline delay Delay between the initial sample of the analog input and the availability of the corresponding digital data output on the output bus. Also called data latency expressed as a number of clock cycles ...

Page 16

... Max. 2.18 2.47 2.72 0.20 0.254 0.30 0.12 0.15 0.18 15.57 15.75 15.92 9.52 9.65 9.78 10.90 6.22 6.35 6.48 1.52 1.65 1.78 0.635 0.20 12.28 12.58 12.88 1.30 1.45 1.60 0.66 0.79 0.92 0.25 0.43 0.61 RHF1201 Inches Min. Typ. Max. 0.086 0.097 0.107 0.008 0.010 0.012 0.005 0.006 0.007 0.613 0.620 0.627 0.375 0.380 0.385 0.429 0.245 0.250 0.255 0.060 0.065 0.070 0.025 0.008 0.483 0.495 0.507 0.051 0.057 0.063 0.026 0.031 0.036 ...

Page 17

... Revision 1 Initial release in new format. Updated failure immune and latchup immune value /mg. 2 Updated package mechanical data. Removed reference to non rad-hard components from External reference on page Ordering information Package Marking SO-48 RHF1201KSO1 SO-48 RHF1201KSO2 SO-48 F0521701VXC Changes 120 MeV- Section 7.3.2: 12. 17/18 ...

Page 18

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 18/18 Please Read Carefully: © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com RHF1201 ...

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